Merge branch 'dev' into misc/interaction

Reviewed-on: #10

.gitignore

@@ -1,6 +1,5 @@
 .*
 !.gitignore
 
-*.olean
 /build
 /lake-packages

LICENSE

@@ -1,190 +0,0 @@
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
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-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
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-   6. Trademarks. This License does not grant permission to use the trade
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-   7. Disclaimer of Warranty. Unless required by applicable law or
-      agreed to in writing, Licensor provides the Work (and each
-      Contributor provides its Contributions) on an "AS IS" BASIS,
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-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
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-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
-      unless required by applicable law (such as deliberate and grossly
-      negligent acts) or agreed to in writing, shall any Contributor be
-      liable to You for damages, including any direct, indirect, special,
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-      result of this License or out of the use or inability to use the
-      Work (including but not limited to damages for loss of goodwill,
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-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
-   Copyright 2024 Leni Aniva
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
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-       http://www.apache.org/licenses/LICENSE-2.0
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-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.

Main.lean

@@ -1,15 +1,14 @@
 import Lean.Data.Json
 import Lean.Environment
 
+import Pantograph.Version
 import Pantograph
-import Repl
 
 -- Main IO functions
-open Pantograph.Repl
-open Pantograph.Protocol
+open Pantograph
 
 /-- Parse a command either in `{ "cmd": ..., "payload": ... }` form or `cmd { ... }` form. -/
-def parseCommand (s: String): Except String Command := do
+def parse_command (s: String): Except String Commands.Command := do
   let s := s.trim
   match s.get? 0 with
   | .some '{' => -- Parse in Json mode
@@ -23,50 +22,94 @@ def parseCommand (s: String): Except String Command := do
       return { cmd := s.take offset, payload := payload }
   | .none => throw "Command is empty"
 
-partial def loop : MainM Unit := do
+unsafe def loop : MainM Unit := do
   let state ← get
   let command ← (← IO.getStdin).getLine
   if command.trim.length = 0 then return ()
-  match parseCommand command with
+  match parse_command command with
   | .error error =>
-    let error  := Lean.toJson ({ error := "command", desc := error }: InteractionError)
+    let error  := Lean.toJson ({ error := "command", desc := error }: Commands.InteractionError)
     -- Using `Lean.Json.compress` here to prevent newline
     IO.println error.compress
   | .ok command =>
-    try
-      let ret ← execute command
-      let str := match state.options.printJsonPretty with
-        | true => ret.pretty
-        | false => ret.compress
-      IO.println str
-    catch e =>
-      let message ← e.toMessageData.toString
-      let error  := Lean.toJson ({ error := "main", desc := message }: InteractionError)
-      IO.println error.compress
+    let ret ← execute command
+    let str := match state.options.printJsonPretty with
+      | true => ret.pretty
+      | false => ret.compress
+    IO.println str
   loop
 
+namespace Lean
+
+/-- This is better than the default version since it handles `.` and doesn't
+ crash the program when it fails. -/
+def setOptionFromString' (opts : Options) (entry : String) : ExceptT String IO Options := do
+  let ps := (entry.splitOn "=").map String.trim
+  let [key, val] ← pure ps | throw "invalid configuration option entry, it must be of the form '<key> = <value>'"
+  let key := Pantograph.str_to_name key
+  let defValue ← getOptionDefaultValue key
+  match defValue with
+  | DataValue.ofString _ => pure $ opts.setString key val
+  | DataValue.ofBool _   =>
+    match val with
+    | "true" => pure $ opts.setBool key true
+    | "false" => pure $ opts.setBool key false
+    | _ => throw  s!"invalid Bool option value '{val}'"
+  | DataValue.ofName _   => pure $ opts.setName key val.toName
+  | DataValue.ofNat _    =>
+    match val.toNat? with
+    | none   => throw s!"invalid Nat option value '{val}'"
+    | some v => pure $ opts.setNat key v
+  | DataValue.ofInt _    =>
+    match val.toInt? with
+    | none   => throw s!"invalid Int option value '{val}'"
+    | some v => pure $ opts.setInt key v
+  | DataValue.ofSyntax _ => throw s!"invalid Syntax option value"
+
+end Lean
+
 
 unsafe def main (args: List String): IO Unit := do
   -- NOTE: A more sophisticated scheme of command line argument handling is needed.
   -- Separate imports and options
   if args == ["--version"] then do
-    IO.println s!"{Pantograph.version}"
+    println! s!"{version}"
     return
 
-  Pantograph.initSearch ""
+  Lean.enableInitializersExecution
+  Lean.initSearchPath (← Lean.findSysroot)
 
-  let coreContext ← args.filterMap (λ s => if s.startsWith "--" then .some <| s.drop 2 else .none)
-    |>.toArray |> Pantograph.createCoreContext
+  let options? ← args.filterMap (λ s => if s.startsWith "--" then .some <| s.drop 2 else .none)
+    |>.foldlM Lean.setOptionFromString' Lean.Options.empty
+    |>.run
+  let options ← match options? with
+    | .ok options => pure options
+    | .error e => throw $ IO.userError s!"Options cannot be parsed: {e}"
   let imports:= args.filter (λ s => ¬ (s.startsWith "--"))
-  let coreState ← Pantograph.createCoreState imports.toArray
+
+  let env ← Lean.importModules
+    (imports := imports.map (λ str => { module := str_to_name str, runtimeOnly := false }))
+    (opts := {})
+    (trustLevel := 1)
   let context: Context := {
     imports
   }
+  let coreContext: Lean.Core.Context := {
+    currNamespace := Lean.Name.str .anonymous "Aniva"
+    openDecls := [],     -- No 'open' directives needed
+    fileName := "<Pantograph>",
+    fileMap := { source := "", positions := #[0], lines := #[1] },
+    options := options
+  }
   try
-    let coreM := loop.run context |>.run' {}
+    let termElabM := loop.run context |>.run' {}
+    let metaM := termElabM.run' (ctx := {
+      declName? := some "_pantograph",
+      errToSorry := false
+    })
+    let coreM := metaM.run'
     IO.println "ready."
-    discard <| coreM.toIO coreContext coreState
+    discard <| coreM.toIO coreContext { env := env }
   catch ex =>
-    let message := ex.toString
-    let error  := Lean.toJson ({ error := "io", desc := message }: InteractionError)
-    IO.println error.compress
+    IO.println "Uncaught IO exception"
+    IO.println ex.toString

Pantograph.lean

@@ -1,8 +1,174 @@
-import Pantograph.Condensed
-import Pantograph.Environment
-import Pantograph.Frontend
-import Pantograph.Goal
-import Pantograph.Library
-import Pantograph.Protocol
+import Pantograph.Commands
 import Pantograph.Serial
-import Pantograph.Version
+import Pantograph.Symbols
+import Pantograph.Tactic
+import Pantograph.SemihashMap
+
+namespace Pantograph
+
+structure Context where
+  imports: List String
+
+/-- Stores state of the REPL -/
+structure State where
+  options: Commands.Options := {}
+  goalStates: SemihashMap GoalState := SemihashMap.empty
+
+-- State monad
+abbrev MainM := ReaderT Context (StateT State Lean.Elab.TermElabM)
+-- For some reason writing `CommandM α := MainM (Except ... α)` disables certain
+-- monadic features in `MainM`
+abbrev CR α := Except Commands.InteractionError α
+
+def execute (command: Commands.Command): MainM Lean.Json := do
+  let run { α β: Type } [Lean.FromJson α] [Lean.ToJson β] (comm: α → MainM (CR β)): MainM Lean.Json :=
+    match Lean.fromJson? command.payload with
+    | .ok args => do
+      match (← comm args) with
+      | .ok result =>  return Lean.toJson result
+      | .error ierror => return Lean.toJson ierror
+    | .error error => return Lean.toJson $ errorCommand s!"Unable to parse json: {error}"
+  match command.cmd with
+  | "reset"          => run reset
+  | "stat"           => run stat
+  | "expr.echo"      => run expr_echo
+  | "lib.catalog"    => run lib_catalog
+  | "lib.inspect"    => run lib_inspect
+  | "options.set"    => run options_set
+  | "options.print"  => run options_print
+  | "goal.start"     => run goal_start
+  | "goal.tactic"    => run goal_tactic
+  | "goal.delete"    => run goal_delete
+  | cmd =>
+    let error: Commands.InteractionError :=
+      errorCommand s!"Unknown command {cmd}"
+    return Lean.toJson error
+  where
+  errorI (type desc: String): Commands.InteractionError := { error := type, desc := desc }
+  errorCommand := errorI "command"
+  errorIndex := errorI "index"
+  -- Command Functions
+  reset (_: Commands.Reset): MainM (CR Commands.StatResult) := do
+    let state ← get
+    let nGoals := state.goalStates.size
+    set { state with goalStates := SemihashMap.empty }
+    return .ok { nGoals }
+  stat (_: Commands.Stat): MainM (CR Commands.StatResult) := do
+    let state ← get
+    let nGoals := state.goalStates.size
+    return .ok { nGoals }
+  lib_catalog (_: Commands.LibCatalog): MainM (CR Commands.LibCatalogResult) := do
+    let env ← Lean.MonadEnv.getEnv
+    let names := env.constants.fold (init := #[]) (λ acc name info =>
+      match to_filtered_symbol name info with
+      | .some x => acc.push x
+      | .none => acc)
+    return .ok { symbols := names }
+  lib_inspect (args: Commands.LibInspect): MainM (CR Commands.LibInspectResult) := do
+    let state ← get
+    let env ← Lean.MonadEnv.getEnv
+    let name := str_to_name args.name
+    let info? := env.find? name
+    match info? with
+    | none => return .error $ errorIndex s!"Symbol not found {args.name}"
+    | some info =>
+      let module? := env.getModuleIdxFor? name >>=
+        (λ idx => env.allImportedModuleNames.get? idx.toNat) |>.map toString
+      let value? := match args.value?, info with
+        | .some true, _ => info.value?
+        | .some false, _ => .none
+        | .none, .defnInfo _ => info.value?
+        | .none, _ => .none
+      return .ok {
+        type := ← serialize_expression state.options info.type,
+        value? := ← value?.mapM (λ v => serialize_expression state.options v),
+        module? := module?
+      }
+  expr_echo (args: Commands.ExprEcho): MainM (CR Commands.ExprEchoResult) := do
+    let state ← get
+    let env ← Lean.MonadEnv.getEnv
+    match syntax_from_str env args.expr with
+    | .error str => return .error $ errorI "parsing" str
+    | .ok syn => do
+      match (← syntax_to_expr syn) with
+      | .error str => return .error $ errorI "elab" str
+      | .ok expr => do
+        try
+          let type ← Lean.Meta.inferType expr
+          return .ok {
+              type := (← serialize_expression (options := state.options) type),
+              expr := (← serialize_expression (options := state.options) expr)
+          }
+        catch exception =>
+          return .error $ errorI "typing" (← exception.toMessageData.toString)
+  options_set (args: Commands.OptionsSet): MainM (CR Commands.OptionsSetResult) := do
+    let state ← get
+    let options := state.options
+    set { state with
+      options := {
+        -- FIXME: This should be replaced with something more elegant
+        printJsonPretty := args.printJsonPretty?.getD options.printJsonPretty,
+        printExprPretty := args.printExprPretty?.getD options.printExprPretty,
+        printExprAST := args.printExprAST?.getD options.printExprAST,
+        proofVariableDelta := args.proofVariableDelta?.getD options.proofVariableDelta,
+        printAuxDecls := args.printAuxDecls?.getD options.printAuxDecls,
+        printImplementationDetailHyps := args.printImplementationDetailHyps?.getD options.printImplementationDetailHyps
+      }
+    }
+    return .ok {  }
+  options_print (_: Commands.OptionsPrint): MainM (CR Commands.OptionsPrintResult) := do
+    return .ok (← get).options
+  goal_start (args: Commands.GoalStart): MainM (CR Commands.GoalStartResult) := do
+    let state ← get
+    let env ← Lean.MonadEnv.getEnv
+    let expr?: Except _ Lean.Expr ← (match args.expr, args.copyFrom with
+      | .some expr, .none =>
+        (match syntax_from_str env expr with
+        | .error str => return .error <| errorI "parsing" str
+        | .ok syn => do
+          (match (← syntax_to_expr syn) with
+          | .error str => return .error <| errorI "elab" str
+          | .ok expr => return .ok expr))
+      | .none, .some copyFrom =>
+        (match env.find? <| str_to_name copyFrom with
+        | .none => return .error <| errorIndex s!"Symbol not found: {copyFrom}"
+        | .some cInfo => return .ok cInfo.type)
+      | .none, .none =>
+        return .error <| errorI "arguments" "At least one of {expr, copyFrom} must be supplied"
+      | _, _ => return .error <| errorI "arguments" "Cannot populate both of {expr, copyFrom}")
+    match expr? with
+    | .error error => return .error error
+    | .ok expr =>
+      let goalState ← GoalState.create expr
+      let (goalStates, goalId) := state.goalStates.insert goalState
+      set { state with goalStates }
+      return .ok { goalId }
+  goal_tactic (args: Commands.GoalTactic): MainM (CR Commands.GoalTacticResult) := do
+    let state ← get
+    match state.goalStates.get? args.goalId with
+    | .none => return .error $ errorIndex s!"Invalid goal index {args.goalId}"
+    | .some goalState =>
+      let result ← GoalState.execute goalState args.tactic |>.run state.options
+      match result with
+      | .success goals =>
+        if goals.isEmpty then
+          return .ok {}
+        else
+          -- Append all goals
+          let (goalStates, goalIds, sGoals) := Array.foldl (λ acc itr =>
+            let (map, indices, serializedGoals) := acc
+            let (goalState, sGoal) := itr
+            let (map, index) := map.insert goalState
+            (map, index :: indices, sGoal :: serializedGoals)
+            ) (state.goalStates, [], []) goals
+          set { state with goalStates }
+          return .ok { goals? := .some sGoals.reverse.toArray, goalIds? := .some goalIds.reverse.toArray }
+      | .failure messages =>
+        return .ok { tacticErrors? := .some messages }
+  goal_delete (args: Commands.GoalDelete): MainM (CR Commands.GoalDeleteResult) := do
+    let state ← get
+    let goalStates := args.goalIds.foldl (λ map id => map.remove id) state.goalStates
+    set { state with goalStates }
+    return .ok {}
+
+end Pantograph

Pantograph/Commands.lean

@@ -0,0 +1,163 @@
+/-
+All the command input/output structures are stored here
+
+Note that no command other than `InteractionError` may have `error` as one of
+its field names to avoid confusion with error messages generated by the REPL.
+-/
+import Lean.Data.Json
+
+namespace Pantograph.Commands
+
+
+/-- Main Option structure, placed here to avoid name collision -/
+structure Options where
+  -- When false, suppress newlines in Json objects. Useful for machine-to-machine interaction.
+  -- This should be  false` by default to avoid any surprises with parsing.
+  printJsonPretty: Bool    := false
+  -- When enabled, pretty print every expression
+  printExprPretty: Bool    := true
+  -- When enabled, print the raw AST of expressions
+  printExprAST: Bool       := false
+  -- When enabled, the types and values of persistent variables in a proof goal
+  -- are not shown unless they are new to the proof step. Reduces overhead
+  proofVariableDelta: Bool := false
+  -- See `pp.auxDecls`
+  printAuxDecls: Bool      := false
+  -- See `pp.implementationDetailHyps`
+  printImplementationDetailHyps: Bool := false
+  deriving Lean.ToJson
+
+abbrev OptionsT := ReaderT Options
+
+--- Expression Objects ---
+
+structure BoundExpression where
+  binders: Array (String × String)
+  target: String
+  deriving Lean.ToJson
+structure Expression where
+  -- Pretty printed expression
+  pp?: Option String             := .none
+  -- AST structure
+  sexp?: Option String           := .none
+  deriving Lean.ToJson
+
+structure Variable where
+  name: String
+  /-- Does the name contain a dagger -/
+  isInaccessible?: Option Bool := .none
+  type?: Option Expression  := .none
+  value?: Option Expression := .none
+  deriving Lean.ToJson
+structure Goal where
+  /-- String case id -/
+  caseName?: Option String  := .none
+  /-- Is the goal in conversion mode -/
+  isConversion: Bool        := false
+  /-- target expression type -/
+  target: Expression
+  /-- Variables -/
+  vars: Array Variable      := #[]
+  deriving Lean.ToJson
+
+
+
+--- Individual Commands and return types ---
+
+structure Command where
+  cmd: String
+  payload: Lean.Json
+  deriving Lean.FromJson
+
+structure InteractionError where
+  error: String
+  desc: String
+  deriving Lean.ToJson
+
+
+--- Individual command and return types ---
+
+
+structure Reset where
+  deriving Lean.FromJson
+structure Stat where
+  deriving Lean.FromJson
+structure StatResult where
+  -- Number of goals states
+  nGoals: Nat
+  deriving Lean.ToJson
+
+-- Return the type of an expression
+structure ExprEcho where
+  expr: String
+  deriving Lean.FromJson
+structure ExprEchoResult where
+  expr: Expression
+  type: Expression
+  deriving Lean.ToJson
+
+-- Print all symbols in environment
+structure LibCatalog where
+  deriving Lean.FromJson
+structure LibCatalogResult where
+  symbols: Array String
+  deriving Lean.ToJson
+-- Print the type of a symbol
+structure LibInspect where
+  name: String
+  -- If true/false, show/hide the value expressions; By default definitions
+  -- values are shown and theorem values are hidden.
+  value?: Option Bool := .some false
+  deriving Lean.FromJson
+structure LibInspectResult where
+  type: Expression
+  value?: Option Expression := .none
+  module?: Option String
+  deriving Lean.ToJson
+
+/-- Set options; See `Options` struct above for meanings -/
+structure OptionsSet where
+  printJsonPretty?: Option Bool
+  printExprPretty?: Option Bool
+  printExprAST?: Option Bool
+  proofVariableDelta?: Option Bool
+  printAuxDecls?: Option Bool
+  printImplementationDetailHyps?: Option Bool
+  deriving Lean.FromJson
+structure OptionsSetResult where
+  deriving Lean.ToJson
+structure OptionsPrint where
+  deriving Lean.FromJson
+abbrev OptionsPrintResult := Options
+
+structure GoalStart where
+  -- Only one of the fields below may be populated.
+  expr: Option String     -- Proof expression
+  copyFrom: Option String -- Theorem name
+  deriving Lean.FromJson
+structure GoalStartResult where
+  goalId: Nat := 0 -- Proof tree id
+  deriving Lean.ToJson
+structure GoalTactic where
+  -- Identifiers for tree, state, and goal
+  goalId: Nat
+  tactic: String
+  deriving Lean.FromJson
+structure GoalTacticResult where
+  -- Existence of this field shows success
+  goals?: Option (Array Goal)          := .none
+  -- Next proof state id, if successful
+  goalIds?: Option (Array Nat)          := .none
+  -- Existence of this field shows failure
+  tacticErrors?: Option (Array String) := .none
+  deriving Lean.ToJson
+
+-- Remove a bunch of goals.
+structure GoalDelete where
+  goalIds: List Nat
+  deriving Lean.FromJson
+structure GoalDeleteResult where
+  deriving Lean.ToJson
+
+
+end Pantograph.Commands

Pantograph/Condensed.lean

@@ -1,95 +0,0 @@
-/- structures for FFI based interface -/
-import Lean
-import Pantograph.Goal
-import Pantograph.Expr
-
-open Lean
-
-namespace Pantograph
-namespace Condensed
-
--- Mirrors Lean's LocalDecl
-structure LocalDecl where
-  -- Default value is for testing
-  fvarId: FVarId := { name := .anonymous }
-  userName: Name
-
-  -- Normalized expression
-  type : Expr
-  value? : Option Expr := .none
-
-structure Goal where
-  mvarId: MVarId := { name := .anonymous }
-  userName: Name := .anonymous
-  context: Array LocalDecl
-  target: Expr
-
-@[export pantograph_goal_is_lhs]
-def isLHS (g: Goal) : Bool := isLHSGoal? g.target |>.isSome
-
--- Functions for creating contexts and states
-@[export pantograph_elab_context]
-def elabContext: Elab.Term.Context := {
-    errToSorry := false
-  }
-
-end Condensed
-
--- Get the list of visible (by default) free variables from a goal
-@[export pantograph_visible_fvars_of_mvar]
-protected def visibleFVarsOfMVar (mctx: MetavarContext) (mvarId: MVarId): Option (Array FVarId) := do
-  let mvarDecl ← mctx.findDecl? mvarId
-  let lctx := mvarDecl.lctx
-  return lctx.decls.foldl (init := #[]) fun r decl? => match decl? with
-    | some decl => if decl.isAuxDecl ∨ decl.isImplementationDetail then r else r.push decl.fvarId
-    | none      => r
-
-@[export pantograph_to_condensed_goal_m]
-def toCondensedGoal (mvarId: MVarId): MetaM Condensed.Goal := do
-  let ppAuxDecls     := Meta.pp.auxDecls.get (← getOptions)
-  let ppImplDetailHyps := Meta.pp.implementationDetailHyps.get (← getOptions)
-  let mvarDecl ← mvarId.getDecl
-  let lctx     := mvarDecl.lctx
-  let lctx     := lctx.sanitizeNames.run' { options := (← getOptions) }
-  Meta.withLCtx lctx mvarDecl.localInstances do
-    let ppVar (localDecl : LocalDecl) : MetaM Condensed.LocalDecl := do
-      match localDecl with
-      | .cdecl _ fvarId userName type _ _ =>
-        let type ← instantiate type
-        return { fvarId, userName, type }
-      | .ldecl _ fvarId userName type value _ _ => do
-        let userName := userName.simpMacroScopes
-        let type ← instantiate type
-        let value ← instantiate value
-        return { fvarId, userName, type, value? := .some value }
-    let vars ← lctx.foldlM (init := []) fun acc (localDecl : LocalDecl) => do
-      let skip := !ppAuxDecls && localDecl.isAuxDecl ||
-        !ppImplDetailHyps && localDecl.isImplementationDetail
-      if skip then
-        return acc
-      else
-        let var ← ppVar localDecl
-        return var::acc
-    return {
-        mvarId,
-        userName := mvarDecl.userName,
-        context := vars.reverse.toArray,
-        target := ← instantiate mvarDecl.type
-    }
-  where
-  instantiate := instantiateAll
-
-@[export pantograph_goal_state_to_condensed_m]
-protected def GoalState.toCondensed (state: GoalState):
-    CoreM (Array Condensed.Goal):= do
-  let metaM := do
-    let goals := state.goals.toArray
-    goals.mapM fun goal => do
-      match state.mctx.findDecl? goal with
-      | .some _ =>
-        let serializedGoal ← toCondensedGoal goal
-        pure serializedGoal
-      | .none => throwError s!"Metavariable does not exist in context {goal.name}"
-  metaM.run' (s := state.savedState.term.meta.meta)
-
-end Pantograph

Pantograph/Environment.lean

@@ -1,153 +0,0 @@
-import Pantograph.Protocol
-import Pantograph.Serial
-import Lean
-
-open Lean
-open Pantograph
-
-namespace Pantograph.Environment
-
-@[export pantograph_is_name_internal]
-def isNameInternal (n: Name): Bool :=
-  -- Returns true if the name is an implementation detail which should not be shown to the user.
-  n.isAuxLemma ∨ n.hasMacroScopes
-
-/-- Catalog all the non-internal and safe names -/
-@[export pantograph_environment_catalog]
-def env_catalog (env: Environment): Array Name := env.constants.fold (init := #[]) (λ acc name _ =>
-  match isNameInternal name with
-  | false => acc.push name
-  | true => acc)
-
-@[export pantograph_environment_module_of_name]
-def module_of_name (env: Environment) (name: Name): Option Name := do
-  let moduleId ←  env.getModuleIdxFor? name
-  return env.allImportedModuleNames.get! moduleId.toNat
-
-def toCompactSymbolName (n: Name) (info: ConstantInfo): String :=
-  let pref := match info with
-  | .axiomInfo  _ => "a"
-  | .defnInfo   _ => "d"
-  | .thmInfo    _ => "t"
-  | .opaqueInfo _ => "o"
-  | .quotInfo   _ => "q"
-  | .inductInfo _ => "i"
-  | .ctorInfo   _ => "c"
-  | .recInfo    _ => "r"
-  s!"{pref}{toString n}"
-
-def toFilteredSymbol (n: Lean.Name) (info: Lean.ConstantInfo): Option String :=
-  if isNameInternal n || info.isUnsafe
-  then Option.none
-  else Option.some <| toCompactSymbolName n info
-def catalog (_: Protocol.EnvCatalog): CoreM Protocol.EnvCatalogResult := do
-  let env ← Lean.MonadEnv.getEnv
-  let names := env.constants.fold (init := #[]) (λ acc name info =>
-    match toFilteredSymbol name info with
-    | .some x => acc.push x
-    | .none => acc)
-  return { symbols := names }
-def inspect (args: Protocol.EnvInspect) (options: @&Protocol.Options): CoreM (Protocol.CR Protocol.EnvInspectResult) := do
-  let env ← Lean.MonadEnv.getEnv
-  let name :=  args.name.toName
-  let info? := env.find? name
-  let info ← match info? with
-    | none => return .error $ Protocol.errorIndex s!"Symbol not found {args.name}"
-    | some info => pure info
-  let module? := env.getModuleIdxFor? name >>=
-    (λ idx => env.allImportedModuleNames.get? idx.toNat) |>.map toString
-  let value? := match args.value?, info with
-    | .some true, _ => info.value?
-    | .some false, _ => .none
-    | .none, .defnInfo _ => info.value?
-    | .none, _ => .none
-  let type ← unfoldAuxLemmas info.type
-  let value? ← value?.mapM (λ v => unfoldAuxLemmas v)
-  -- Information common to all symbols
-  let core := {
-    type := ← (serializeExpression options type).run',
-    isUnsafe := info.isUnsafe,
-    value? := ← value?.mapM (λ v => serializeExpression options v |>.run'),
-    publicName? := Lean.privateToUserName? name |>.map (·.toString),
-    -- BUG: Warning: getUsedConstants here will not include projections. This is a known bug.
-    typeDependency? := if args.dependency?.getD false
-      then .some <| type.getUsedConstants.map (λ n => serializeName n)
-      else .none,
-    valueDependency? := if args.dependency?.getD false
-      then value?.map (λ e =>
-        e.getUsedConstants.filter (!isNameInternal ·) |>.map (λ n => serializeName n) )
-      else .none,
-    module? := module?
-  }
-  let result ← match info with
-    | .inductInfo induct => pure { core with inductInfo? := .some {
-          numParams := induct.numParams,
-          numIndices := induct.numIndices,
-          all := induct.all.toArray.map (·.toString),
-          ctors := induct.ctors.toArray.map (·.toString),
-          isRec := induct.isRec,
-          isReflexive := induct.isReflexive,
-          isNested := induct.isNested,
-      } }
-    | .ctorInfo ctor => pure { core with constructorInfo? := .some {
-          induct := ctor.induct.toString,
-          cidx := ctor.cidx,
-          numParams := ctor.numParams,
-          numFields := ctor.numFields,
-      } }
-    | .recInfo r => pure { core with recursorInfo? := .some {
-          all := r.all.toArray.map (·.toString),
-          numParams := r.numParams,
-          numIndices := r.numIndices,
-          numMotives := r.numMotives,
-          numMinors := r.numMinors,
-          rules := ← r.rules.toArray.mapM (λ rule => do
-              pure {
-                ctor := rule.ctor.toString,
-                nFields := rule.nfields,
-                rhs := ← (serializeExpression options rule.rhs).run',
-              })
-          k := r.k,
-      } }
-    | _ => pure core
-  return .ok result
-def addDecl (args: Protocol.EnvAdd): CoreM (Protocol.CR Protocol.EnvAddResult) := do
-  let env ← Lean.MonadEnv.getEnv
-  let tvM: Elab.TermElabM (Except String (Expr × Expr)) := do
-    let type ← match parseTerm env args.type with
-      | .ok syn => do
-        match ← elabTerm syn with
-        | .error e => return .error e
-        | .ok expr => pure expr
-      | .error e => return .error e
-    let value ← match parseTerm env args.value with
-      | .ok syn => do
-        try
-          let expr ← Elab.Term.elabTerm (stx := syn) (expectedType? := .some type)
-          Lean.Elab.Term.synthesizeSyntheticMVarsNoPostponing
-          let expr ← instantiateMVars expr
-          pure $ expr
-        catch ex => return .error (← ex.toMessageData.toString)
-      | .error e => return .error e
-    pure $ .ok (type, value)
-  let (type, value) ← match ← tvM.run' (ctx := {}) |>.run' with
-    | .ok t => pure t
-    | .error e => return .error $ Protocol.errorExpr e
-  let constant := Lean.Declaration.defnDecl <| Lean.mkDefinitionValEx
-    (name := args.name.toName)
-    (levelParams := [])
-    (type := type)
-    (value := value)
-    (hints := Lean.mkReducibilityHintsRegularEx 1)
-    (safety := Lean.DefinitionSafety.safe)
-    (all := [])
-  let env' ← match env.addDecl (← getOptions) constant with
-    | .error e => do
-      let options ← Lean.MonadOptions.getOptions
-      let desc ← (e.toMessageData options).toString
-      return .error $ { error := "kernel", desc }
-    | .ok env' => pure env'
-  Lean.MonadEnv.modifyEnv (λ _ => env')
-  return .ok {}
-
-end Pantograph.Environment

Pantograph/Expr.lean

@@ -1,162 +0,0 @@
-import Lean
-import Std.Data.HashMap
-
-open Lean
-
-namespace Pantograph
-
-structure ProjectionApplication where
-  projector: Name
-  numParams: Nat
-  inner: Expr
-
-@[export pantograph_expr_proj_to_app]
-def exprProjToApp (env: Environment) (e: Expr): ProjectionApplication :=
-  let (typeName, idx, inner) := match e with
-    | .proj typeName idx inner => (typeName, idx, inner)
-    | _ => panic! "Argument must be proj"
-  let ctor := getStructureCtor env typeName
-  let fieldName := getStructureFields env typeName |>.get! idx
-  let projector := getProjFnForField? env typeName fieldName |>.get!
-  {
-    projector,
-    numParams := ctor.numParams,
-    inner,
-  }
-
-def _root_.Lean.Name.isAuxLemma (n : Lean.Name) : Bool := n matches .num (.str _ "_auxLemma") _
-
-/-- Unfold all lemmas created by `Lean.Meta.mkAuxLemma`. These end in `_auxLemma.nn` where `nn` is a number. -/
-@[export pantograph_unfold_aux_lemmas]
-def unfoldAuxLemmas (e : Expr) : CoreM Expr := do
-  Lean.Meta.deltaExpand e Lean.Name.isAuxLemma
-
-/--
-Force the instantiation of delayed metavariables even if they cannot be fully
-instantiated. This is used during resumption to provide diagnostic data about
-the current goal.
-
-Since Lean 4 does not have an `Expr` constructor corresponding to delayed
-metavariables, any delayed metavariables must be recursively handled by this
-function to ensure that nested delayed metavariables can be properly processed.
-The caveat is this recursive call will lead to infinite recursion if a loop
-between metavariable assignment exists.
-
-This function ensures any metavariable in the result is either
-1. Delayed assigned with its pending mvar not assigned in any form
-2. Not assigned (delay or not)
- -/
-partial def instantiateDelayedMVars (eOrig: Expr) : MetaM Expr := do
-  --let padding := String.join $ List.replicate level "│ "
-  --IO.println s!"{padding}Starting {toString eOrig}"
-  let mut result ← Meta.transform (← instantiateMVars eOrig)
-    (pre := fun e => e.withApp fun f args => do
-      let .mvar mvarId := f | return .continue
-      --IO.println s!"{padding}├V {e}"
-      let mvarDecl ← mvarId.getDecl
-
-      -- This is critical to maintaining the interdependency of metavariables.
-      -- Without setting `.syntheticOpaque`, Lean's metavariable elimination
-      -- system will not make the necessary delayed assigned mvars in case of
-      -- nested mvars.
-      mvarId.setKind .syntheticOpaque
-
-      mvarId.withContext do
-        let lctx ← MonadLCtx.getLCtx
-        if mvarDecl.lctx.any (λ decl => !lctx.contains decl.fvarId) then
-          let violations := mvarDecl.lctx.decls.foldl (λ acc decl? => match decl? with
-            | .some decl => if lctx.contains decl.fvarId then acc else acc ++ [decl.fvarId.name]
-            | .none => acc) []
-          panic! s!"In the context of {mvarId.name}, there are local context variable violations: {violations}"
-
-        if let .some assign ← getExprMVarAssignment? mvarId then
-          --IO.println s!"{padding}├A ?{mvarId.name}"
-          assert! !(← mvarId.isDelayedAssigned)
-          return .visit (mkAppN assign args)
-        else if let some { fvars, mvarIdPending } ← getDelayedMVarAssignment? mvarId then
-          --let substTableStr := String.intercalate ", " $ Array.zipWith fvars args (λ fvar assign => s!"{fvar.fvarId!.name} := {assign}") |>.toList
-          --IO.println s!"{padding}├MD ?{mvarId.name} := ?{mvarIdPending.name} [{substTableStr}]"
-
-          if args.size < fvars.size then
-            throwError "Not enough arguments to instantiate a delay assigned mvar. This is due to bad implementations of a tactic: {args.size} < {fvars.size}. Expr: {toString e}; Origin: {toString eOrig}"
-          --if !args.isEmpty then
-            --IO.println s!"{padding}├── Arguments Begin"
-          let args ← args.mapM self
-          --if !args.isEmpty then
-            --IO.println s!"{padding}├── Arguments End"
-          if !(← mvarIdPending.isAssignedOrDelayedAssigned) then
-            --IO.println s!"{padding}├T1"
-            let result := mkAppN f args
-            return .done result
-
-          let pending ← mvarIdPending.withContext do
-            let inner ← instantiateDelayedMVars (.mvar mvarIdPending) --(level := level + 1)
-            --IO.println s!"{padding}├Pre: {inner}"
-            pure <| (← inner.abstractM fvars).instantiateRev args
-
-          -- Tail arguments
-          let result := mkAppRange pending fvars.size args.size args
-          --IO.println s!"{padding}├MD {result}"
-          return .done result
-        else
-          assert! !(← mvarId.isAssigned)
-          assert! !(← mvarId.isDelayedAssigned)
-          --if !args.isEmpty then
-          --  IO.println s!"{padding}├── Arguments Begin"
-          let args ← args.mapM self
-          --if !args.isEmpty then
-          --  IO.println s!"{padding}├── Arguments End"
-
-          --IO.println s!"{padding}├M ?{mvarId.name}"
-          return .done (mkAppN f args))
-  --IO.println s!"{padding}└Result {result}"
-  return result
-  where
-  self e := instantiateDelayedMVars e --(level := level + 1)
-
-/--
-Convert an expression to an equiavlent form with
-1. No nested delayed assigned mvars
-2. No aux lemmas
-3. No assigned mvars
- -/
-@[export pantograph_instantiate_all_m]
-def instantiateAll (e: Expr): MetaM Expr := do
-  let e ← instantiateDelayedMVars e
-  let e ← unfoldAuxLemmas e
-  return e
-
-structure DelayedMVarInvocation where
-  mvarIdPending: MVarId
-  args: Array (FVarId × (Option Expr))
-  -- Extra arguments applied to the result of this substitution
-  tail: Array Expr
-
--- The pending mvar of any delayed assigned mvar must not be assigned in any way.
-@[export pantograph_to_delayed_mvar_invocation_m]
-def toDelayedMVarInvocation (e: Expr): MetaM (Option DelayedMVarInvocation) := do
-  let .mvar mvarId := e.getAppFn | return .none
-  let .some decl ← getDelayedMVarAssignment? mvarId | return .none
-  let mvarIdPending := decl.mvarIdPending
-  let mvarDecl ← mvarIdPending.getDecl
-  -- Print the function application e. See Lean's `withOverApp`
-  let args := e.getAppArgs
-
-  assert! args.size ≥ decl.fvars.size
-  assert! !(← mvarIdPending.isAssigned)
-  assert! !(← mvarIdPending.isDelayedAssigned)
-  let fvarArgMap: Std.HashMap FVarId Expr := Std.HashMap.ofList $ (decl.fvars.map (·.fvarId!) |>.zip args).toList
-  let subst ← mvarDecl.lctx.foldlM (init := []) λ acc localDecl => do
-    let fvarId := localDecl.fvarId
-    let a := fvarArgMap[fvarId]?
-    return acc ++ [(fvarId, a)]
-
-  assert! decl.fvars.all (λ fvar => mvarDecl.lctx.findFVar? fvar |>.isSome)
-
-  return .some {
-    mvarIdPending,
-    args := subst.toArray,
-    tail := args.toList.drop decl.fvars.size |>.toArray,
-  }
-
-end Pantograph

Pantograph/Frontend.lean

@@ -1,4 +0,0 @@
-/- Adapted from lean-training-data by semorrison -/
-import Pantograph.Frontend.Basic
-import Pantograph.Frontend.Elab
-import Pantograph.Frontend.MetaTranslate

Pantograph/Frontend/Basic.lean

@@ -1,120 +0,0 @@
-import Lean.Parser
-import Lean.Elab.Frontend
-
-open Lean
-
-namespace Lean.FileMap
-
-/-- Extract the range of a `Syntax` expressed as lines and columns. -/
--- Extracted from the private declaration `Lean.Elab.formatStxRange`,
--- in `Lean.Elab.InfoTree.Main`.
-@[export pantograph_frontend_stx_range]
-protected def stxRange (fileMap : FileMap) (stx : Syntax) : Position × Position :=
-  let pos    := stx.getPos?.getD 0
-  let endPos := stx.getTailPos?.getD pos
-  (fileMap.toPosition pos, fileMap.toPosition endPos)
-
-end Lean.FileMap
-namespace Lean.PersistentArray
-
-/--
-Drop the first `n` elements of a `PersistentArray`, returning the results as a `List`.
--/
--- We can't remove the `[Inhabited α]` hypotheses here until
--- `PersistentArray`'s `GetElem` instance also does.
-protected def drop [Inhabited α] (t : PersistentArray α) (n : Nat) : List α :=
-  List.range (t.size - n) |>.map fun i => t.get! (n + i)
-
-end Lean.PersistentArray
-
-
-namespace Pantograph.Frontend
-
-abbrev FrontendM := Elab.Frontend.FrontendM
-
-structure CompilationStep where
-  fileName : String
-  fileMap : FileMap
-  src : Substring
-  stx : Syntax
-  before : Environment
-  after : Environment
-  msgs : List Message
-  trees : List Elab.InfoTree
-
-namespace CompilationStep
-
-@[export pantograph_frontend_compilation_step_message_strings_m]
-def messageStrings (step: CompilationStep) : IO (Array String) := do
-  List.toArray <$> step.msgs.mapM (·.toString)
-
-end CompilationStep
-
-
-/--
-Process one command, returning a `CompilationStep` and
-`done : Bool`, indicating whether this was the last command.
--/
-@[export pantograph_frontend_process_one_command_m]
-def processOneCommand: FrontendM (CompilationStep × Bool) := do
-  let s := (← get).commandState
-  let before := s.env
-  let done ← Elab.Frontend.processCommand
-  let stx := (← get).commands.back
-  let src := (← read).inputCtx.input.toSubstring.extract (← get).cmdPos (← get).parserState.pos
-  let s' := (← get).commandState
-  let after := s'.env
-  let msgs := s'.messages.toList.drop s.messages.toList.length
-  let trees := s'.infoState.trees.drop s.infoState.trees.size
-  let ⟨_, fileName, fileMap⟩  := (← read).inputCtx
-  return ({ fileName, fileMap, src, stx, before, after, msgs, trees }, done)
-
-partial def mapCompilationSteps { α } (f: CompilationStep → IO α) : FrontendM (List α) := do
-  let (cmd, done) ← processOneCommand
-  if done then
-    if cmd.src.isEmpty then
-      return []
-    else
-      return [← f cmd]
-  else
-    return (← f cmd) :: (← mapCompilationSteps f)
-
-
-@[export pantograph_frontend_find_source_path_m]
-def findSourcePath (module : Name) : IO System.FilePath := do
-  return System.FilePath.mk ((← findOLean module).toString.replace ".lake/build/lib/" "") |>.withExtension "lean"
-
-/--
-Use with
-```lean
-let m: FrontendM α := ...
-let (context, state) ← createContextStateFromFile ...
-m.run context |>.run' state
-```
--/
-@[export pantograph_frontend_create_context_state_from_file_m]
-def createContextStateFromFile
-    (file : String) -- Content of the file
-    (fileName : String := "<anonymous>")
-    (env? : Option Lean.Environment := .none) -- If set to true, assume there's no header.
-    (opts : Options := {})
-    : IO (Elab.Frontend.Context × Elab.Frontend.State) := unsafe do
-  --let file ← IO.FS.readFile (← findSourcePath module)
-  let inputCtx := Parser.mkInputContext file fileName
-
-  let (env, parserState, messages) ← match env? with
-    | .some env => pure (env, {}, .empty)
-    | .none =>
-      let (header, parserState, messages) ← Parser.parseHeader inputCtx
-      let (env, messages) ← Elab.processHeader header opts messages inputCtx
-      pure (env, parserState, messages)
-  let commandState := Elab.Command.mkState env messages opts
-  let context: Elab.Frontend.Context := { inputCtx }
-  let state: Elab.Frontend.State := {
-    commandState := { commandState with infoState.enabled := true },
-    parserState,
-    cmdPos := parserState.pos
-  }
-  return (context, state)
-
-end Pantograph.Frontend

Pantograph/Frontend/Elab.lean

@@ -1,223 +0,0 @@
-/- Adapted from https://github.com/semorrison/lean-training-data -/
-import Lean.Elab.Import
-import Lean.Elab.Command
-import Lean.Elab.InfoTree
-
-import Pantograph.Frontend.Basic
-import Pantograph.Frontend.MetaTranslate
-import Pantograph.Goal
-import Pantograph.Protocol
-
-open Lean
-
-namespace Lean.Elab.Info
-/-- The `Syntax` for a `Lean.Elab.Info`, if there is one. -/
-protected def stx? : Info → Option Syntax
-  | .ofTacticInfo         info => info.stx
-  | .ofTermInfo           info => info.stx
-  | .ofCommandInfo        info => info.stx
-  | .ofMacroExpansionInfo info => info.stx
-  | .ofOptionInfo         info => info.stx
-  | .ofFieldInfo          info => info.stx
-  | .ofCompletionInfo     info => info.stx
-  | .ofUserWidgetInfo     info => info.stx
-  | .ofCustomInfo         info => info.stx
-  | .ofFVarAliasInfo      _    => none
-  | .ofFieldRedeclInfo    info => info.stx
-  | .ofOmissionInfo       info => info.stx
-/-- Is the `Syntax` for this `Lean.Elab.Info` original, or synthetic? -/
-protected def isOriginal (i : Info) : Bool :=
-  match i.stx? with
-  | none => true   -- Somewhat unclear what to do with `FVarAliasInfo`, so be conservative.
-  | some stx => match stx.getHeadInfo with
-    | .original .. => true
-    | _ => false
-end Lean.Elab.Info
-
-namespace Lean.Elab.TacticInfo
-
-/-- Find the name for the outermost `Syntax` in this `TacticInfo`. -/
-def name? (t : TacticInfo) : Option Name :=
-  match t.stx with
-  | Syntax.node _ n _ => some n
-  | _ => none
-/-- Decide whether a tactic is "substantive",
-or is merely a tactic combinator (e.g. `by`, `;`, multiline tactics, parenthesized tactics). -/
-def isSubstantive (t : TacticInfo) : Bool :=
-  match t.name? with
-  | none => false
-  | some `null => false
-  | some ``cdot => false
-  | some ``cdotTk => false
-  | some ``Lean.Parser.Term.byTactic => false
-  | some ``Lean.Parser.Tactic.tacticSeq => false
-  | some ``Lean.Parser.Tactic.tacticSeq1Indented => false
-  | some ``Lean.Parser.Tactic.«tactic_<;>_» => false
-  | some ``Lean.Parser.Tactic.paren => false
-  | _ => true
-
-end Lean.Elab.TacticInfo
-
-namespace Lean.Elab.InfoTree
-
-/--
-Keep `.node` nodes and `.hole` nodes satisfying predicates.
-
-Returns a `List InfoTree`, although in most situations this will be a singleton.
--/
-partial def filter (p : Info → Bool) (m : MVarId → Bool := fun _ => false) :
-    InfoTree → List InfoTree
-  | .context ctx tree => tree.filter p m |>.map (.context ctx)
-  | .node info children =>
-    if p info then
-      [.node info (children.toList.map (filter p m)).join.toPArray']
-    else
-      (children.toList.map (filter p m)).join
-  | .hole mvar => if m mvar then [.hole mvar] else []
-
-end Lean.Elab.InfoTree
-
-
-namespace Pantograph.Frontend
-
--- Info tree filtering functions
-
-structure TacticInvocation where
-  info : Elab.TacticInfo
-  ctx : Elab.ContextInfo
-  children : PersistentArray Elab.InfoTree
-namespace TacticInvocation
-
-/-- Return the range of the tactic, as a pair of file positions. -/
-@[export pantograph_frontend_tactic_invocation_range]
-protected def range (t : TacticInvocation) : Position × Position := t.ctx.fileMap.stxRange t.info.stx
-
-/-- Pretty print a tactic. -/
-protected def pp (t : TacticInvocation) : IO Format :=
-  t.ctx.runMetaM {} try
-    Lean.PrettyPrinter.ppTactic ⟨t.info.stx⟩
-  catch _ =>
-    pure "<failed to pretty print>"
-
-/-- Run a tactic on the goals stored in a `TacticInvocation`. -/
-protected def runMetaMGoalsBefore (t : TacticInvocation) (x : List MVarId → MetaM α) : IO α := do
-  t.ctx.runMetaM {} <| Meta.withMCtx t.info.mctxBefore <| x t.info.goalsBefore
-
-/-- Run a tactic on the after goals stored in a `TacticInvocation`. -/
-protected def runMetaMGoalsAfter (t : TacticInvocation) (x : List MVarId → MetaM α) : IO α := do
-  t.ctx.runMetaM {} <| Meta.withMCtx t.info.mctxAfter <| x t.info.goalsAfter
-
-/-- Run a tactic on the main goal stored in a `TacticInvocation`. -/
-protected def runMetaM (t : TacticInvocation) (x : MVarId → MetaM α) : IO α := do
-  match t.info.goalsBefore.head? with
-  | none => throw <| IO.userError s!"No goals at {← t.pp}"
-  | some g => t.runMetaMGoalsBefore fun _ => do g.withContext <| x g
-
-protected def goalState (t : TacticInvocation) : IO (List Format) := do
-  t.runMetaMGoalsBefore (fun gs => gs.mapM fun g => do Meta.ppGoal g)
-
-protected def goalStateAfter (t : TacticInvocation) : IO (List Format) := do
-  t.runMetaMGoalsAfter (fun gs => gs.mapM fun g => do Meta.ppGoal g)
-
-protected def ppExpr (t : TacticInvocation) (e : Expr) : IO Format :=
-  t.runMetaM (fun _ => do Meta.ppExpr (← instantiateMVars e))
-
-protected def usedConstants (t: TacticInvocation) : NameSet :=
-  let info := t.info
-  info.goalsBefore
-    |>.filterMap info.mctxAfter.getExprAssignmentCore?
-    |>.map Expr.getUsedConstantsAsSet
-    |>.foldl .union .empty
-
-end TacticInvocation
-
-/-- Analogue of `Lean.Elab.InfoTree.findInfo?`, but that returns a list of all results. -/
-partial def findAllInfo (t : Elab.InfoTree) (context?: Option Elab.ContextInfo) (pred : Elab.Info → Bool) :
-    List (Elab.Info × Option Elab.ContextInfo × PersistentArray Elab.InfoTree) :=
-  match t with
-  | .context inner t => findAllInfo t (inner.mergeIntoOuter? context?) pred
-  | .node i children  =>
-      (if pred i then [(i, context?, children)] else []) ++ children.toList.bind (fun t => findAllInfo t context? pred)
-  | _ => []
-
-/-- Return all `TacticInfo` nodes in an `InfoTree` corresponding to tactics,
-each equipped with its relevant `ContextInfo`, and any children info trees. -/
-private def collectTacticNodes (t : Elab.InfoTree) : List TacticInvocation :=
-  let infos := findAllInfo t none fun i => match i with
-    | .ofTacticInfo _ => true
-    | _ => false
-  infos.filterMap fun p => match p with
-    | (.ofTacticInfo i, some ctx, children) => .some ⟨i, ctx, children⟩
-    | _ => none
-
-def collectTactics (t : Elab.InfoTree) : List TacticInvocation :=
-  collectTacticNodes t |>.filter fun i => i.info.isSubstantive
-
-@[export pantograph_frontend_collect_tactics_from_compilation_step_m]
-def collectTacticsFromCompilationStep (step : CompilationStep) : IO (List Protocol.InvokedTactic) := do
-  let tacticInfoTrees := step.trees.bind λ tree => tree.filter λ
-    | info@(.ofTacticInfo _) => info.isOriginal
-    | _ => false
-  let tactics := tacticInfoTrees.bind collectTactics
-  tactics.mapM λ invocation => do
-    let goalBefore := (Format.joinSep (← invocation.goalState) "\n").pretty
-    let goalAfter := (Format.joinSep (← invocation.goalStateAfter) "\n").pretty
-    let tactic ← invocation.ctx.runMetaM {} do
-      let t ← PrettyPrinter.ppTactic ⟨invocation.info.stx⟩
-      return t.pretty
-    let usedConstants := invocation.usedConstants.toArray.map λ n => n.toString
-    return {
-      goalBefore,
-      goalAfter,
-      tactic,
-      usedConstants,
-    }
-
-structure InfoWithContext where
-  info: Elab.Info
-  context?: Option Elab.ContextInfo := .none
-
-private def collectSorrysInTree (t : Elab.InfoTree) : List InfoWithContext :=
-  let infos := findAllInfo t none fun i => match i with
-    | .ofTermInfo { expectedType?, expr, stx, .. } =>
-      expr.isSorry ∧ expectedType?.isSome ∧ stx.isOfKind `Lean.Parser.Term.sorry
-    | .ofTacticInfo { stx, goalsBefore, .. } =>
-      -- The `sorry` term is distinct from the `sorry` tactic
-      let isSorry := stx.isOfKind `Lean.Parser.Tactic.tacticSorry
-      isSorry ∧ !goalsBefore.isEmpty
-    | _ => false
-  infos.map fun (info, context?, _) => { info, context? }
-
--- NOTE: Plural deliberately not spelled "sorries"
-@[export pantograph_frontend_collect_sorrys_m]
-def collectSorrys (step: CompilationStep) : List InfoWithContext :=
-  step.trees.bind collectSorrysInTree
-
-
-
-/--
-Since we cannot directly merge `MetavarContext`s, we have to get creative. This
-function duplicates frozen mvars in term and tactic info nodes, and add them to
-the current `MetavarContext`.
--/
-@[export pantograph_frontend_sorrys_to_goal_state]
-def sorrysToGoalState (sorrys : List InfoWithContext) : MetaM GoalState := do
-  assert! !sorrys.isEmpty
-  let goalsM := sorrys.mapM λ i => do
-    match i.info with
-    | .ofTermInfo termInfo  => do
-      let mvarId ← MetaTranslate.translateMVarFromTermInfo termInfo i.context?
-      return [mvarId]
-    | .ofTacticInfo tacticInfo => do
-      MetaTranslate.translateMVarFromTacticInfoBefore tacticInfo i.context?
-    | _ => panic! "Invalid info"
-  let goals := List.join (← goalsM.run {} |>.run' {})
-  let root := match goals with
-    | [] => panic! "No MVars generated"
-    | [g] => g
-    | _ => { name := .anonymous }
-  GoalState.createFromMVars goals root
-
-
-
-end Pantograph.Frontend

Pantograph/Frontend/MetaTranslate.lean

@@ -1,164 +0,0 @@
-import Lean.Meta
-import Std.Data.HashMap
-
-open Lean
-
-namespace Pantograph.Frontend
-
-namespace MetaTranslate
-
-structure Context where
-  sourceMCtx : MetavarContext := {}
-  sourceLCtx : LocalContext := {}
-
-abbrev FVarMap := Std.HashMap FVarId FVarId
-
-structure State where
-  -- Stores mapping from old to new mvar/fvars
-  mvarMap: Std.HashMap MVarId MVarId := {}
-  fvarMap: Std.HashMap FVarId FVarId := {}
-
-/-
-Monadic state for translating a frozen meta state. The underlying `MetaM`
-operates in the "target" context and state.
--/
-abbrev MetaTranslateM := ReaderT Context StateRefT State MetaM
-
-def getSourceLCtx : MetaTranslateM LocalContext := do pure (← read).sourceLCtx
-def getSourceMCtx : MetaTranslateM MetavarContext := do pure (← read).sourceMCtx
-def addTranslatedFVar (src dst: FVarId) : MetaTranslateM Unit := do
-  modifyGet λ state => ((), { state with fvarMap := state.fvarMap.insert src dst })
-def addTranslatedMVar (src dst: MVarId) : MetaTranslateM Unit := do
-  modifyGet λ state => ((), { state with mvarMap := state.mvarMap.insert src dst })
-
-def saveFVarMap : MetaTranslateM FVarMap := do
-  return (← get).fvarMap
-def restoreFVarMap (map: FVarMap) : MetaTranslateM Unit := do
-  modifyGet λ state => ((), { state with fvarMap := map })
-def resetFVarMap : MetaTranslateM Unit := do
-  modifyGet λ state => ((), { state with fvarMap := {} })
-
-mutual
-private partial def translateLevel (srcLevel: Level) : MetaTranslateM Level := do
-  let sourceMCtx ← getSourceMCtx
-  let (_, level) := instantiateLevelMVarsImp sourceMCtx srcLevel
-  match level with
-  | .zero => return .zero
-  | .succ inner => do
-    let inner' ← translateLevel inner
-    return .succ inner'
-  | .max l1 l2 => do
-    let l1' ← translateLevel l1
-    let l2' ← translateLevel l2
-    return .max l1' l2'
-  | .imax l1 l2 => do
-    let l1' ← translateLevel l1
-    let l2' ← translateLevel l2
-    return .imax l1' l2'
-  | .param p => return .param p
-  | .mvar _ =>
-    Meta.mkFreshLevelMVar
-private partial def translateExpr (srcExpr: Expr) : MetaTranslateM Expr := do
-  let sourceMCtx ← getSourceMCtx
-  -- We want to create as few mvars as possible
-  let (srcExpr, _) := instantiateMVarsCore (mctx := sourceMCtx) srcExpr
-  --IO.println s!"Transform src: {srcExpr}"
-  let result ← Core.transform srcExpr λ e => do
-    let state ← get
-    match e with
-    | .fvar fvarId =>
-      let .some fvarId' := state.fvarMap[fvarId]? | panic! s!"FVar id not registered: {fvarId.name}"
-      assert! (← getLCtx).contains fvarId'
-      return .done $ .fvar fvarId'
-    | .mvar mvarId => do
-      -- Must not be assigned
-      assert! !(sourceMCtx.eAssignment.contains mvarId)
-      match state.mvarMap[mvarId]? with
-      | .some mvarId' => do
-        return .done $ .mvar mvarId'
-      | .none => do
-        -- Entering another LCtx, must save the current one
-        let fvarMap ← saveFVarMap
-        let mvarId' ← translateMVarId mvarId
-        restoreFVarMap fvarMap
-        return .done $ .mvar mvarId'
-    | .sort level => do
-      let level' ← translateLevel level
-      return .done $ .sort level'
-    | _ => return .continue
-  Meta.check result
-  return result
-
-partial def translateLocalInstance (srcInstance: LocalInstance) : MetaTranslateM LocalInstance := do
-  return {
-    className := srcInstance.className,
-    fvar := ← translateExpr srcInstance.fvar
-  }
-partial def translateLocalDecl (srcLocalDecl: LocalDecl) : MetaTranslateM LocalDecl := do
-  let fvarId ← mkFreshFVarId
-  addTranslatedFVar srcLocalDecl.fvarId fvarId
-  match srcLocalDecl with
-  | .cdecl index _ userName type bi kind => do
-    --IO.println s!"[CD] {userName} {toString type}"
-    return .cdecl index fvarId userName (← translateExpr type) bi kind
-  | .ldecl index _ userName type value nonDep kind => do
-    --IO.println s!"[LD] {toString type} := {toString value}"
-    return .ldecl index fvarId userName (← translateExpr type) (← translateExpr value) nonDep kind
-
-partial def translateLCtx : MetaTranslateM LocalContext := do
-  resetFVarMap
-  let lctx ← MonadLCtx.getLCtx
-  assert! lctx.isEmpty
-  (← getSourceLCtx).foldlM (λ lctx srcLocalDecl => do
-    let localDecl ← Meta.withLCtx lctx #[] do
-      translateLocalDecl srcLocalDecl
-    pure $ lctx.addDecl localDecl
-  ) lctx
-
-partial def translateMVarId (srcMVarId: MVarId) : MetaTranslateM MVarId := do
-  if let .some mvarId' := (← get).mvarMap[srcMVarId]? then
-    return mvarId'
-  let mvarId' ← Meta.withLCtx .empty #[] do
-    let srcDecl := (← getSourceMCtx).findDecl? srcMVarId |>.get!
-    withTheReader Context (λ ctx => { ctx with sourceLCtx := srcDecl.lctx }) do
-      let lctx' ← translateLCtx
-      let localInstances' ← srcDecl.localInstances.mapM translateLocalInstance
-      Meta.withLCtx lctx' localInstances' do
-        let target' ← translateExpr srcDecl.type
-        let mvar' ← Meta.mkFreshExprMVar target' srcDecl.kind srcDecl.userName
-        let mvarId' := mvar'.mvarId!
-        if let .some { fvars, mvarIdPending }:= (← getSourceMCtx).getDelayedMVarAssignmentExp srcMVarId then
-          -- Map the fvars in the pending context.
-          let mvarIdPending' ← translateMVarId mvarIdPending
-          let fvars' ← mvarIdPending'.withContext $ fvars.mapM translateExpr
-          assignDelayedMVar mvarId' fvars' mvarIdPending'
-        pure mvarId'
-  addTranslatedMVar srcMVarId mvarId'
-  return mvarId'
-end
-
-def translateMVarFromTermInfo (termInfo : Elab.TermInfo) (context? : Option Elab.ContextInfo)
-    : MetaTranslateM MVarId := do
-  withTheReader Context (λ ctx => { ctx with
-    sourceMCtx := context?.map (·.mctx) |>.getD {},
-    sourceLCtx := termInfo.lctx,
-  }) do
-    let type := termInfo.expectedType?.get!
-    let lctx' ← translateLCtx
-    let mvar ← Meta.withLCtx lctx' #[] do
-      let type' ← translateExpr type
-      Meta.mkFreshExprSyntheticOpaqueMVar type'
-    return mvar.mvarId!
-
-
-def translateMVarFromTacticInfoBefore (tacticInfo : Elab.TacticInfo) (_context? : Option Elab.ContextInfo)
-    : MetaTranslateM (List MVarId) := do
-  withTheReader Context (λ ctx => { ctx with sourceMCtx := tacticInfo.mctxBefore }) do
-    tacticInfo.goalsBefore.mapM translateMVarId
-
-
-end MetaTranslate
-
-export MetaTranslate (MetaTranslateM)
-
-end Pantograph.Frontend

Pantograph/Goal.lean

@@ -1,397 +0,0 @@
-/-
-Functions for handling metavariables
-
-All the functions starting with `try` resume their inner monadic state.
--/
-import Pantograph.Tactic
-import Lean
-
-
-namespace Pantograph
-open Lean
-
-def filename: String := "<pantograph>"
-
-/--
-Represents an interconnected set of metavariables, or a state in proof search
- -/
-structure GoalState where
-  savedState : Elab.Tactic.SavedState
-
-  -- The root hole which is the search target
-  root: MVarId
-
-  -- Parent state metavariable source
-  parentMVar?: Option MVarId
-
-  -- Existence of this field shows that we are currently in `conv` mode.
-  -- (convRhs, goal, dormant)
-  convMVar?: Option (MVarId × MVarId × List MVarId) := .none
-  -- Previous RHS for calc, so we don't have to repeat it every time
-  -- WARNING: If using `state with` outside of `calc`, this must be set to `.none`
-  calcPrevRhs?: Option (MVarId × Expr) := .none
-
-@[export pantograph_goal_state_create_m]
-protected def GoalState.create (expr: Expr): Elab.TermElabM GoalState := do
-  -- May be necessary to immediately synthesise all metavariables if we need to leave the elaboration context.
-  -- See https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Unknown.20universe.20metavariable/near/360130070
-
-  --Elab.Term.synthesizeSyntheticMVarsNoPostponing
-  --let expr ← instantiateMVars expr
-  let root ← Meta.mkFreshExprMVar expr (kind := MetavarKind.synthetic) (userName := .anonymous)
-  let savedStateMonad: Elab.Tactic.TacticM Elab.Tactic.SavedState := MonadBacktrack.saveState
-  let savedState ← savedStateMonad { elaborator := .anonymous } |>.run' { goals := [root.mvarId!]}
-  return {
-    root := root.mvarId!,
-    savedState,
-    parentMVar? := .none,
-  }
-@[export pantograph_goal_state_create_from_mvars_m]
-protected def GoalState.createFromMVars (goals: List MVarId) (root: MVarId): MetaM GoalState := do
-  let savedStateMonad: Elab.Tactic.TacticM Elab.Tactic.SavedState := MonadBacktrack.saveState
-  let savedState ← savedStateMonad { elaborator := .anonymous } |>.run' { goals } |>.run' {}
-  return {
-    root,
-    savedState,
-    parentMVar? := .none,
-  }
-@[export pantograph_goal_state_is_conv]
-protected def GoalState.isConv (state: GoalState): Bool :=
-  state.convMVar?.isSome
-protected def GoalState.goals (state: GoalState): List MVarId :=
-  state.savedState.tactic.goals
-@[export pantograph_goal_state_goals]
-protected def GoalState.goalsArray (state: GoalState): Array MVarId := state.goals.toArray
-protected def GoalState.mctx (state: GoalState): MetavarContext :=
-  state.savedState.term.meta.meta.mctx
-protected def GoalState.env (state: GoalState): Environment :=
-  state.savedState.term.meta.core.env
-
-@[export pantograph_goal_state_meta_context_of_goal]
-protected def GoalState.metaContextOfGoal (state: GoalState) (mvarId: MVarId): Option Meta.Context := do
-  let mvarDecl ← state.mctx.findDecl? mvarId
-  return { lctx := mvarDecl.lctx, localInstances := mvarDecl.localInstances }
-protected def GoalState.metaState (state: GoalState): Meta.State :=
-  state.savedState.term.meta.meta
-
-protected def GoalState.withContext (state: GoalState) (mvarId: MVarId) (m: MetaM α): MetaM α := do
-  mvarId.withContext m |>.run' (← read) state.metaState
-
-protected def GoalState.withParentContext { n } [MonadControlT MetaM n] [Monad n] (state: GoalState): n α → n α :=
-  Meta.mapMetaM <| state.withContext state.parentMVar?.get!
-protected def GoalState.withRootContext { n } [MonadControlT MetaM n] [Monad n] (state: GoalState): n α → n α :=
-  Meta.mapMetaM <| state.withContext state.root
-
-private def GoalState.mvars (state: GoalState): SSet MVarId :=
-  state.mctx.decls.foldl (init := .empty) fun acc k _ => acc.insert k
-protected def GoalState.restoreMetaM (state: GoalState): MetaM Unit :=
-  state.savedState.term.meta.restore
-protected def GoalState.restoreElabM (state: GoalState): Elab.TermElabM Unit :=
-  state.savedState.term.restore
-private def GoalState.restoreTacticM (state: GoalState) (goal: MVarId): Elab.Tactic.TacticM Unit := do
-  state.savedState.restore
-  Elab.Tactic.setGoals [goal]
-
-@[export pantograph_goal_state_focus]
-protected def GoalState.focus (state: GoalState) (goalId: Nat): Option GoalState := do
-  let goal ← state.savedState.tactic.goals.get? goalId
-  return {
-    state with
-    savedState := {
-      state.savedState with
-      tactic := { goals := [goal] },
-    },
-    calcPrevRhs? := .none,
-  }
-
-/-- Immediately bring all parent goals back into scope. Used in automatic mode -/
-@[export pantograph_goal_state_immediate_resume_parent]
-protected def GoalState.immediateResume (state: GoalState) (parent: GoalState): GoalState :=
-  -- Prune parents solved goals
-  let mctx := state.mctx
-  let parentGoals := parent.goals.filter $ λ goal => mctx.eAssignment.contains goal
-  {
-    state with
-    savedState := {
-      state.savedState with
-      tactic := { goals := state.goals ++ parentGoals },
-    },
-  }
-
-/--
-Brings into scope a list of goals
--/
-@[export pantograph_goal_state_resume]
-protected def GoalState.resume (state: GoalState) (goals: List MVarId): Except String GoalState :=
-  if ¬ (goals.all (λ goal => state.mvars.contains goal)) then
-    let invalid_goals := goals.filter (λ goal => ¬ state.mvars.contains goal) |>.map (·.name.toString)
-    .error s!"Goals {invalid_goals} are not in scope"
-  else
-    -- Set goals to the goals that have not been assigned yet, similar to the `focus` tactic.
-    let unassigned := goals.filter (λ goal =>
-      let mctx := state.mctx
-      ¬(mctx.eAssignment.contains goal || mctx.dAssignment.contains goal))
-    .ok {
-      state with
-      savedState := {
-        term := state.savedState.term,
-        tactic := { goals := unassigned },
-      },
-    }
-/--
-Brings into scope all goals from `branch`
--/
-@[export pantograph_goal_state_continue]
-protected def GoalState.continue (target: GoalState) (branch: GoalState): Except String GoalState :=
-  if !target.goals.isEmpty then
-    .error s!"Target state has unresolved goals"
-  else if target.root != branch.root then
-    .error s!"Roots of two continued goal states do not match: {target.root.name} != {branch.root.name}"
-  else
-    target.resume (goals := branch.goals)
-
-@[export pantograph_goal_state_root_expr]
-protected def GoalState.rootExpr? (goalState: GoalState): Option Expr := do
-  if goalState.root.name == .anonymous then
-    .none
-  let expr ← goalState.mctx.eAssignment.find? goalState.root
-  let (expr, _) := instantiateMVarsCore (mctx := goalState.mctx) (e := expr)
-  if expr.hasExprMVar then
-    -- Must not assert that the goal state is empty here. We could be in a branch goal.
-    --assert! ¬goalState.goals.isEmpty
-    .none
-  else
-    assert! goalState.goals.isEmpty
-    return expr
-@[export pantograph_goal_state_parent_expr]
-protected def GoalState.parentExpr? (goalState: GoalState): Option Expr := do
-  let parent ← goalState.parentMVar?
-  let expr := goalState.mctx.eAssignment.find! parent
-  let (expr, _) := instantiateMVarsCore (mctx := goalState.mctx) (e := expr)
-  return expr
-@[export pantograph_goal_state_get_mvar_e_assignment]
-protected def GoalState.getMVarEAssignment (goalState: GoalState) (mvarId: MVarId): Option Expr := do
-  let expr ← goalState.mctx.eAssignment.find? mvarId
-  let (expr, _) := instantiateMVarsCore (mctx := goalState.mctx) (e := expr)
-  return expr
-
---- Tactic execution functions ---
-
-protected def GoalState.step (state: GoalState) (goal: MVarId) (tacticM: Elab.Tactic.TacticM Unit)
-  : Elab.TermElabM GoalState := do
-  unless (← getMCtx).decls.contains goal do
-    throwError s!"Goal is not in context: {goal.name}"
-  goal.checkNotAssigned `GoalState.step
-  let (_, newGoals) ← tacticM { elaborator := .anonymous } |>.run { goals := [goal] }
-  let nextElabState ← MonadBacktrack.saveState
-  return {
-    state with
-    savedState := { term := nextElabState, tactic := newGoals },
-    parentMVar? := .some goal,
-    calcPrevRhs? := .none,
-  }
-
-/-- Response for executing a tactic -/
-inductive TacticResult where
-  -- Goes to next state
-  | success (state: GoalState)
-  -- Tactic failed with messages
-  | failure (messages: Array String)
-  -- Could not parse tactic
-  | parseError (message: String)
-  -- The given action cannot be executed in the state
-  | invalidAction (message: String)
-
-/-- Executes a `TacticM` monads on this `GoalState`, collecting the errors as necessary -/
-protected def GoalState.tryTacticM (state: GoalState) (goal: MVarId) (tacticM: Elab.Tactic.TacticM Unit):
-      Elab.TermElabM TacticResult := do
-  try
-    let nextState ← state.step goal tacticM
-    return .success nextState
-  catch exception =>
-    return .failure #[← exception.toMessageData.toString]
-
-/-- Execute a string tactic on given state. Restores TermElabM -/
-protected def GoalState.tryTactic (state: GoalState) (goal: MVarId) (tactic: String):
-    Elab.TermElabM TacticResult := do
-  state.restoreElabM
-  let tactic ← match Parser.runParserCategory
-    (env := ← MonadEnv.getEnv)
-    (catName := if state.isConv then `conv else `tactic)
-    (input := tactic)
-    (fileName := filename) with
-    | .ok stx => pure $ stx
-    | .error error => return .parseError error
-  state.tryTacticM goal $ Elab.Tactic.evalTactic tactic
-
-protected def GoalState.tryAssign (state: GoalState) (goal: MVarId) (expr: String):
-      Elab.TermElabM TacticResult := do
-  state.restoreElabM
-  let expr ← match Parser.runParserCategory
-    (env := ← MonadEnv.getEnv)
-    (catName := `term)
-    (input := expr)
-    (fileName := filename) with
-    | .ok syn => pure syn
-    | .error error => return .parseError error
-  state.tryTacticM goal $ Tactic.evalAssign expr
-
--- Specialized Tactics
-
-protected def GoalState.tryLet (state: GoalState) (goal: MVarId) (binderName: String) (type: String):
-      Elab.TermElabM TacticResult := do
-  state.restoreElabM
-  let type ← match Parser.runParserCategory
-    (env := ← MonadEnv.getEnv)
-    (catName := `term)
-    (input := type)
-    (fileName := filename) with
-    | .ok syn => pure syn
-    | .error error => return .parseError error
-  state.tryTacticM goal $ Tactic.evalLet binderName.toName type
-
-/-- Enter conv tactic mode -/
-protected def GoalState.conv (state: GoalState) (goal: MVarId):
-      Elab.TermElabM TacticResult := do
-  if state.convMVar?.isSome then
-    return .invalidAction "Already in conv state"
-  goal.checkNotAssigned `GoalState.conv
-  let tacticM :  Elab.Tactic.TacticM (Elab.Tactic.SavedState × MVarId) := do
-    state.restoreTacticM goal
-
-    -- See Lean.Elab.Tactic.Conv.convTarget
-    let convMVar ← Elab.Tactic.withMainContext do
-      let (rhs, newGoal) ← Elab.Tactic.Conv.mkConvGoalFor (← Elab.Tactic.getMainTarget)
-      Elab.Tactic.replaceMainGoal [newGoal.mvarId!]
-      pure rhs.mvarId!
-    return (← MonadBacktrack.saveState, convMVar)
-  try
-    let (nextSavedState, convRhs) ← tacticM { elaborator := .anonymous } |>.run' state.savedState.tactic
-    -- Other goals are now dormant
-    let otherGoals := state.goals.filter $ λ g => g != goal
-    return .success {
-      root := state.root,
-      savedState := nextSavedState
-      parentMVar? := .some goal,
-      convMVar? := .some (convRhs, goal, otherGoals),
-      calcPrevRhs? := .none
-    }
-  catch exception =>
-    return .failure #[← exception.toMessageData.toString]
-
-/-- Exit from `conv` mode. Resumes all goals before the mode starts and applys the conv -/
-@[export pantograph_goal_state_conv_exit_m]
-protected def GoalState.convExit (state: GoalState):
-      Elab.TermElabM TacticResult := do
-  let (convRhs, convGoal, _) ← match state.convMVar? with
-    | .some mvar => pure mvar
-    | .none => return .invalidAction "Not in conv state"
-  let tacticM :  Elab.Tactic.TacticM Elab.Tactic.SavedState:= do
-    -- Vide `Lean.Elab.Tactic.Conv.convert`
-    state.savedState.restore
-
-    -- Close all existing goals with `refl`
-    for mvarId in (← Elab.Tactic.getGoals) do
-      liftM <| mvarId.refl <|> mvarId.inferInstance <|> pure ()
-    Elab.Tactic.pruneSolvedGoals
-    unless (← Elab.Tactic.getGoals).isEmpty do
-      throwError "convert tactic failed, there are unsolved goals\n{Elab.goalsToMessageData (← Elab.Tactic.getGoals)}"
-
-    Elab.Tactic.setGoals [convGoal]
-
-    let targetNew ← instantiateMVars (.mvar convRhs)
-    let proof ← instantiateMVars (.mvar convGoal)
-
-    Elab.Tactic.liftMetaTactic1 fun mvarId => mvarId.replaceTargetEq targetNew proof
-    MonadBacktrack.saveState
-  try
-    let nextSavedState ← tacticM { elaborator := .anonymous } |>.run' state.savedState.tactic
-    return .success {
-      root := state.root,
-      savedState := nextSavedState
-      parentMVar? := .some convGoal,
-      convMVar? := .none
-      calcPrevRhs? := .none
-    }
-  catch exception =>
-    return .failure #[← exception.toMessageData.toString]
-
-protected def GoalState.calcPrevRhsOf? (state: GoalState) (goal: MVarId): Option Expr := do
-  let (mvarId, rhs) ← state.calcPrevRhs?
-  if mvarId == goal then
-    .some rhs
-  else
-    .none
-@[export pantograph_goal_state_try_calc_m]
-protected def GoalState.tryCalc (state: GoalState) (goal: MVarId) (pred: String):
-      Elab.TermElabM TacticResult := do
-  state.restoreElabM
-  if state.convMVar?.isSome then
-    return .invalidAction "Cannot initiate `calc` while in `conv` state"
-  let `(term|$pred) ← match Parser.runParserCategory
-    (env := state.env)
-    (catName := `term)
-    (input := pred)
-    (fileName := filename) with
-    | .ok syn => pure syn
-    | .error error => return .parseError error
-  goal.checkNotAssigned `GoalState.tryCalc
-  let calcPrevRhs? := state.calcPrevRhsOf? goal
-  let decl ← goal.getDecl
-  let target ← instantiateMVars decl.type
-  let tag := decl.userName
-  try
-    goal.withContext do
-
-    let mut step ← Elab.Term.elabType <| ← do
-      if let some prevRhs := calcPrevRhs? then
-        Elab.Term.annotateFirstHoleWithType pred (← Meta.inferType prevRhs)
-      else
-        pure pred
-
-    let some (_, lhs, rhs) ← Elab.Term.getCalcRelation? step |
-      throwErrorAt pred "invalid 'calc' step, relation expected{indentExpr step}"
-    if let some prevRhs := calcPrevRhs? then
-      unless ← Meta.isDefEqGuarded lhs prevRhs do
-        throwErrorAt pred "invalid 'calc' step, left-hand-side is{indentD m!"{lhs} : {← Meta.inferType lhs}"}\nprevious right-hand-side is{indentD m!"{prevRhs} : {← Meta.inferType prevRhs}"}" -- "
-
-    -- Creates a mvar to represent the proof that the calc tactic solves the
-    -- current branch
-    -- In the Lean `calc` tactic this is gobbled up by
-    -- `withCollectingNewGoalsFrom`
-    let mut proof ← Meta.mkFreshExprMVarAt (← getLCtx) (← Meta.getLocalInstances) step
-      (userName := tag ++ `calc)
-    let mvarBranch := proof.mvarId!
-
-    let mut proofType ← Meta.inferType proof
-    let mut remainder? := Option.none
-
-    -- The calc tactic either solves the main goal or leaves another relation.
-    -- Replace the main goal, and save the new goal if necessary
-    unless ← Meta.isDefEq proofType target do
-      let rec throwFailed :=
-        throwError "'calc' tactic failed, has type{indentExpr proofType}\nbut it is expected to have type{indentExpr target}"
-      let some (_, _, rhs) ← Elab.Term.getCalcRelation? proofType | throwFailed
-      let some (r, _, rhs') ← Elab.Term.getCalcRelation? target | throwFailed
-      let lastStep := mkApp2 r rhs rhs'
-      let lastStepGoal ← Meta.mkFreshExprSyntheticOpaqueMVar lastStep tag
-      (proof, proofType) ← Elab.Term.mkCalcTrans proof proofType lastStepGoal lastStep
-      unless ← Meta.isDefEq proofType target do throwFailed
-      remainder? := .some lastStepGoal.mvarId!
-    goal.assign proof
-
-    let goals := [ mvarBranch ] ++ remainder?.toList
-    let calcPrevRhs? := remainder?.map $ λ g => (g, rhs)
-    return .success {
-      root := state.root,
-      savedState := {
-        term := ← MonadBacktrack.saveState,
-        tactic := { goals },
-      },
-      parentMVar? := .some goal,
-      calcPrevRhs?
-    }
-  catch exception =>
-    return .failure #[← exception.toMessageData.toString]
-
-end Pantograph

Pantograph/Library.lean

@@ -1,205 +0,0 @@
-import Pantograph.Condensed
-import Pantograph.Environment
-import Pantograph.Goal
-import Pantograph.Protocol
-import Pantograph.Serial
-import Pantograph.Version
-import Lean
-
-namespace Lean
-
-/-- This is better than the default version since it handles `.` and doesn't
- crash the program when it fails. -/
-def setOptionFromString' (opts : Options) (entry : String) : ExceptT String IO Options := do
-  let ps := (entry.splitOn "=").map String.trim
-  let [key, val] ← pure ps | throw "invalid configuration option entry, it must be of the form '<key> = <value>'"
-  let key := key.toName
-  let defValue ← getOptionDefaultValue key
-  match defValue with
-  | DataValue.ofString _ => pure $ opts.setString key val
-  | DataValue.ofBool _   =>
-    match val with
-    | "true" => pure $ opts.setBool key true
-    | "false" => pure $ opts.setBool key false
-    | _ => throw  s!"invalid Bool option value '{val}'"
-  | DataValue.ofName _   => pure $ opts.setName key val.toName
-  | DataValue.ofNat _    =>
-    match val.toNat? with
-    | none   => throw s!"invalid Nat option value '{val}'"
-    | some v => pure $ opts.setNat key v
-  | DataValue.ofInt _    =>
-    match val.toInt? with
-    | none   => throw s!"invalid Int option value '{val}'"
-    | some v => pure $ opts.setInt key v
-  | DataValue.ofSyntax _ => throw s!"invalid Syntax option value"
-
-end Lean
-
-open Lean
-
-namespace Pantograph
-
-def runMetaM { α } (metaM: MetaM α): CoreM α :=
-  metaM.run'
-def runTermElabM { α } (termElabM: Elab.TermElabM α): CoreM α :=
-  termElabM.run' (ctx := Condensed.elabContext) |>.run'
-
-def errorI (type desc: String): Protocol.InteractionError := { error := type, desc := desc }
-
-/-- Adds the given paths to Lean package search path -/
-@[export pantograph_init_search]
-unsafe def initSearch (sp: String): IO Unit := do
-  Lean.enableInitializersExecution
-  Lean.initSearchPath (← Lean.findSysroot) (sp := System.SearchPath.parse sp)
-
-/-- Creates a Core.Context object needed to run all monads -/
-@[export pantograph_create_core_context]
-def createCoreContext (options: Array String): IO Core.Context := do
-  let options? ← options.foldlM setOptionFromString' Options.empty |>.run
-  let options ← match options? with
-    | .ok options => pure options
-    | .error e => throw $ IO.userError s!"Options cannot be parsed: {e}"
-  return {
-    currNamespace := Name.str .anonymous "Aniva"
-    openDecls := [],     -- No 'open' directives needed
-    fileName := "<Pantograph>",
-    fileMap := { source := "", positions := #[0] },
-    options := options
-  }
-
-/-- Creates a Core.State object needed to run all monads -/
-@[export pantograph_create_core_state]
-def createCoreState (imports: Array String): IO Core.State := do
-  let env ← Lean.importModules
-    (imports := imports.map (λ str => { module := str.toName, runtimeOnly := false }))
-    (opts := {})
-    (trustLevel := 1)
-  return { env := env }
-
-@[export pantograph_env_add_m]
-def envAdd (name: String) (type: String) (value: String) (isTheorem: Bool):
-    CoreM (Protocol.CR Protocol.EnvAddResult) :=
-  Environment.addDecl { name, type, value, isTheorem }
-
-@[export pantograph_parse_elab_type_m]
-def parseElabType (type: String): Elab.TermElabM (Protocol.CR Expr) := do
-  let env ← MonadEnv.getEnv
-  let syn ← match parseTerm env type with
-    | .error str => return .error $ errorI "parsing" str
-    | .ok syn => pure syn
-  match ← elabType syn with
-  | .error str => return .error $ errorI "elab" str
-  | .ok expr => return .ok (← instantiateMVars expr)
-
-/-- This must be a TermElabM since the parsed expr contains extra information -/
-@[export pantograph_parse_elab_expr_m]
-def parseElabExpr (expr: String) (expectedType?: Option String := .none): Elab.TermElabM (Protocol.CR Expr) := do
-  let env ← MonadEnv.getEnv
-  let expectedType? ← match ← expectedType?.mapM parseElabType with
-    | .none => pure $ .none
-    | .some (.ok t) => pure $ .some t
-    | .some (.error e) => return .error e
-  let syn ← match parseTerm env expr with
-    | .error str => return .error $ errorI "parsing" str
-    | .ok syn => pure syn
-  match ← elabTerm syn expectedType? with
-  | .error str => return .error $ errorI "elab" str
-  | .ok expr => return .ok (← instantiateMVars expr)
-
-@[export pantograph_expr_echo_m]
-def exprEcho (expr: String) (expectedType?: Option String := .none) (levels: Array String := #[])  (options: @&Protocol.Options := {}):
-    CoreM (Protocol.CR Protocol.ExprEchoResult) :=
-  runTermElabM $ Elab.Term.withLevelNames (levels.toList.map (·.toName)) do
-    let expr ← match ← parseElabExpr expr expectedType? with
-      | .error e => return .error e
-      | .ok expr => pure expr
-    try
-      let type ← unfoldAuxLemmas (← Meta.inferType expr)
-      return .ok {
-          type := (← serializeExpression options type),
-          expr := (← serializeExpression options expr)
-      }
-    catch exception =>
-      return .error $ errorI "typing" (← exception.toMessageData.toString)
-
-@[export pantograph_goal_start_expr_m]
-def goalStartExpr (expr: String) (levels: Array String): CoreM (Protocol.CR GoalState) :=
-  runTermElabM $ Elab.Term.withLevelNames (levels.toList.map (·.toName)) do
-    let expr ← match ← parseElabType expr with
-      | .error e => return .error e
-      | .ok expr => pure $ expr
-    return .ok $ ← GoalState.create expr
-
-@[export pantograph_goal_resume]
-def goalResume (target: GoalState) (goals: Array String): Except String GoalState :=
-  target.resume (goals.map (λ n => { name := n.toName }) |>.toList)
-
-@[export pantograph_goal_serialize_m]
-def goalSerialize (state: GoalState) (options: @&Protocol.Options): CoreM (Array Protocol.Goal) :=
-  runMetaM <| state.serializeGoals (parent := .none) options
-
-@[export pantograph_goal_print_m]
-def goalPrint (state: GoalState) (options: @&Protocol.Options): CoreM Protocol.GoalPrintResult :=
-  runMetaM do
-    state.restoreMetaM
-    return {
-      root? := ← state.rootExpr?.mapM (λ expr =>
-        state.withRootContext do
-          serializeExpression options (← instantiateAll expr)),
-      parent? := ← state.parentExpr?.mapM (λ expr =>
-        state.withParentContext do
-          serializeExpression options (← instantiateAll expr)),
-    }
-
-@[export pantograph_goal_tactic_m]
-def goalTactic (state: GoalState) (goal:  MVarId) (tactic: String): CoreM TacticResult :=
-  runTermElabM <| state.tryTactic goal tactic
-@[export pantograph_goal_assign_m]
-def goalAssign (state: GoalState) (goal: MVarId) (expr: String): CoreM TacticResult :=
-  runTermElabM <| state.tryAssign goal expr
-@[export pantograph_goal_have_m]
-protected def GoalState.tryHave (state: GoalState) (goal: MVarId) (binderName: String) (type: String): CoreM TacticResult := do
-  let type ← match (← parseTermM type) with
-    | .ok syn => pure syn
-    | .error error => return .parseError error
-  runTermElabM do
-    state.restoreElabM
-    state.tryTacticM goal $ Tactic.evalHave binderName.toName type
-@[export pantograph_goal_try_define_m]
-protected def GoalState.tryDefine (state: GoalState) (goal: MVarId) (binderName: String) (expr: String): CoreM TacticResult := do
-  let expr ← match (← parseTermM expr) with
-    | .ok syn => pure syn
-    | .error error => return .parseError error
-  runTermElabM do
-    state.restoreElabM
-    state.tryTacticM goal (Tactic.evalDefine binderName.toName expr)
-@[export pantograph_goal_try_motivated_apply_m]
-protected def GoalState.tryMotivatedApply (state: GoalState) (goal: MVarId) (recursor: String):
-      Elab.TermElabM TacticResult := do
-  state.restoreElabM
-  let recursor ← match (← parseTermM recursor) with
-    | .ok syn => pure syn
-    | .error error => return .parseError error
-  state.tryTacticM goal (tacticM := Tactic.evalMotivatedApply recursor)
-@[export pantograph_goal_try_no_confuse_m]
-protected def GoalState.tryNoConfuse (state: GoalState) (goal: MVarId) (eq: String):
-      Elab.TermElabM TacticResult := do
-  state.restoreElabM
-  let eq ← match (← parseTermM eq) with
-    | .ok syn => pure syn
-    | .error error => return .parseError error
-  state.tryTacticM goal (tacticM := Tactic.evalNoConfuse eq)
-@[export pantograph_goal_let_m]
-def goalLet (state: GoalState) (goal: MVarId) (binderName: String) (type: String): CoreM TacticResult :=
-  runTermElabM <| state.tryLet goal binderName type
-@[export pantograph_goal_conv_m]
-def goalConv (state: GoalState) (goal: MVarId): CoreM TacticResult :=
-  runTermElabM <| state.conv goal
-@[export pantograph_goal_conv_exit_m]
-def goalConvExit (state: GoalState): CoreM TacticResult :=
-  runTermElabM <| state.convExit
-@[export pantograph_goal_calc_m]
-def goalCalc (state: GoalState) (goal: MVarId) (pred: String): CoreM TacticResult :=
-  runTermElabM <| state.tryCalc goal pred
-
-end Pantograph

Pantograph/Protocol.lean

@@ -1,321 +0,0 @@
-/-
-All the command input/output structures are stored here
-
-Note that no command other than `InteractionError` may have `error` as one of
-its field names to avoid confusion with error messages generated by the REPL.
--/
-import Lean.Data.Json
-
-namespace Pantograph.Protocol
-
-
-/-- Main Option structure, placed here to avoid name collision -/
-structure Options where
-  -- When false, suppress newlines in Json objects. Useful for machine-to-machine interaction.
-  -- This should be  false` by default to avoid any surprises with parsing.
-  printJsonPretty: Bool    := false
-  -- When enabled, pretty print every expression
-  printExprPretty: Bool    := true
-  -- When enabled, print the raw AST of expressions
-  printExprAST: Bool       := false
-  printDependentMVars: Bool := false
-  -- When enabled, the types and values of persistent variables in a goal
-  -- are not shown unless they are new to the proof step. Reduces overhead.
-  -- NOTE: that this assumes the type and assignment of variables can never change.
-  noRepeat: Bool := false
-  -- See `pp.auxDecls`
-  printAuxDecls: Bool      := false
-  -- See `pp.implementationDetailHyps`
-  printImplementationDetailHyps: Bool := false
-  -- If this is set to `true`, goals will never go dormant, so you don't have to manage resumption
-  automaticMode: Bool := true
-  deriving Lean.ToJson
-
-abbrev OptionsT := ReaderT Options
-
---- Expression Objects ---
-
-structure BoundExpression where
-  binders: Array (String × String)
-  target: String
-  deriving Lean.ToJson
-structure Expression where
-  -- Pretty printed expression
-  pp?: Option String             := .none
-  -- AST structure
-  sexp?: Option String           := .none
-  dependentMVars?: Option (Array String) := .none
-  deriving Lean.ToJson
-
-structure Variable where
-  /-- The internal name used in raw expressions -/
-  name: String := ""
-  /-- The name displayed to the user -/
-  userName: String
-  /-- Does the name contain a dagger -/
-  isInaccessible: Bool := false
-  type?: Option Expression  := .none
-  value?: Option Expression := .none
-  deriving Lean.ToJson
-structure Goal where
-  name: String := ""
-  /-- Name of the metavariable -/
-  userName?: Option String  := .none
-  /-- Is the goal in conversion mode -/
-  isConversion: Bool        := false
-  /-- target expression type -/
-  target: Expression
-  /-- Variables -/
-  vars: Array Variable      := #[]
-  deriving Lean.ToJson
-
-
-
---- Individual Commands and return types ---
-
-structure Command where
-  cmd: String
-  payload: Lean.Json
-  deriving Lean.FromJson
-
-structure InteractionError where
-  error: String
-  desc: String
-  deriving Lean.ToJson
-
-def errorIndex (desc: String): InteractionError := { error := "index", desc }
-def errorExpr (desc: String): InteractionError := { error := "expr", desc }
-
-
---- Individual command and return types ---
-
-
-structure Reset where
-  deriving Lean.FromJson
-structure Stat where
-  deriving Lean.FromJson
-structure StatResult where
-  -- Number of goals states
-  nGoals: Nat
-  deriving Lean.ToJson
-
--- Return the type of an expression
-structure ExprEcho where
-  expr: String
-  type?: Option String
-  -- universe levels
-  levels: Option (Array String) := .none
-  deriving Lean.FromJson
-structure ExprEchoResult where
-  expr: Expression
-  type: Expression
-  deriving Lean.ToJson
-
--- Print all symbols in environment
-structure EnvCatalog where
-  deriving Lean.FromJson
-structure EnvCatalogResult where
-  symbols: Array String
-  deriving Lean.ToJson
-
--- Print the type of a symbol
-structure EnvInspect where
-  name: String
-  -- If true/false, show/hide the value expressions; By default definitions
-  -- values are shown and theorem values are hidden.
-  value?: Option Bool := .some false
-  -- If true, show the type and value dependencies
-  dependency?: Option Bool := .some false
-  deriving Lean.FromJson
--- See `InductiveVal`
-structure InductInfo where
-  numParams: Nat
-  numIndices: Nat
-  all: Array String
-  ctors: Array String
-  isRec:       Bool := false
-  isReflexive: Bool := false
-  isNested:    Bool := false
-  deriving Lean.ToJson
--- See `ConstructorVal`
-structure ConstructorInfo where
-  induct: String
-  cidx: Nat
-  numParams: Nat
-  numFields: Nat
-  deriving Lean.ToJson
-
-/-- See `Lean/Declaration.lean` -/
-structure RecursorRule where
-  ctor: String
-  nFields: Nat
-  rhs: Expression
-  deriving Lean.ToJson
-structure RecursorInfo where
-  all: Array String
-  numParams: Nat
-  numIndices: Nat
-  numMotives: Nat
-  numMinors: Nat
-  rules: Array RecursorRule
-  k: Bool
-  deriving Lean.ToJson
-structure EnvInspectResult where
-  type: Expression
-  isUnsafe: Bool            := false
-  value?: Option Expression := .none
-  module?: Option String    := .none
-  -- If the name is private, displays the public facing name
-  publicName?: Option String := .none
-  typeDependency?: Option (Array String) := .none
-  valueDependency?: Option (Array String) := .none
-  inductInfo?:      Option InductInfo      := .none
-  constructorInfo?: Option ConstructorInfo := .none
-  recursorInfo?:    Option RecursorInfo    := .none
-  deriving Lean.ToJson
-
-structure EnvAdd where
-  name: String
-  type: String
-  value: String
-  isTheorem: Bool
-  deriving Lean.FromJson
-structure EnvAddResult where
-  deriving Lean.ToJson
-
-/-- Set options; See `Options` struct above for meanings -/
-structure OptionsSet where
-  printJsonPretty?: Option Bool
-  printExprPretty?: Option Bool
-  printExprAST?: Option Bool
-  printDependentMVars?: Option Bool
-  noRepeat?: Option Bool
-  printAuxDecls?: Option Bool
-  printImplementationDetailHyps?: Option Bool
-  automaticMode?: Option Bool
-  deriving Lean.FromJson
-structure OptionsSetResult where
-  deriving Lean.ToJson
-structure OptionsPrint where
-  deriving Lean.FromJson
-
-structure GoalStart where
-  -- Only one of the fields below may be populated.
-  expr: Option String     -- Directly parse in an expression
-  -- universe levels
-  levels: Option (Array String) := .none
-  copyFrom: Option String -- Copy the type from a theorem in the environment
-  deriving Lean.FromJson
-structure GoalStartResult where
-  stateId: Nat := 0
-  -- Name of the root metavariable
-  root: String
-  deriving Lean.ToJson
-structure GoalTactic where
-  -- Identifiers for tree, state, and goal
-  stateId: Nat
-  goalId: Nat := 0
-  -- One of the fields here must be filled
-  tactic?: Option String := .none
-  expr?: Option String := .none
-  have?: Option String := .none
-  let?: Option String := .none
-  calc?: Option String := .none
-  -- true to enter `conv`, `false` to exit. In case of exit the `goalId` is ignored.
-  conv?: Option Bool := .none
-
-  -- In case of the `have` tactic, the new free variable name is provided here
-  binderName?: Option String := .none
-
-  deriving Lean.FromJson
-structure GoalTacticResult where
-  -- The next goal state id. Existence of this field shows success
-  nextStateId?: Option Nat          := .none
-  -- If the array is empty, it shows the goals have been fully resolved.
-  goals?: Option (Array Goal)          := .none
-
-  -- Existence of this field shows tactic execution failure
-  tacticErrors?: Option (Array String) := .none
-
-  -- Existence of this field shows the tactic parsing has failed
-  parseError?: Option String := .none
-  deriving Lean.ToJson
-structure GoalContinue where
-  -- State from which the continuation acquires the context
-  target: Nat
-
-  -- One of the following must be supplied
-  -- The state which is an ancestor of `target` where goals will be extracted from
-  branch?: Option Nat := .none
-  -- Or, the particular goals that should be brought back into scope
-  goals?: Option (Array String) := .none
-  deriving Lean.FromJson
-structure GoalContinueResult where
-  nextStateId: Nat
-  goals: (Array Goal)
-  deriving Lean.ToJson
-
--- Remove goal states
-structure GoalDelete where
-  -- This is ok being a List because it doesn't show up in the ABI
-  stateIds: List Nat
-  deriving Lean.FromJson
-structure GoalDeleteResult where
-  deriving Lean.ToJson
-
-structure GoalPrint where
-  stateId: Nat
-  deriving Lean.FromJson
-structure GoalPrintResult where
-  -- The root expression
-  root?: Option Expression := .none
-  -- The filling expression of the parent goal
-  parent?: Option Expression
-  deriving Lean.ToJson
-
--- Diagnostic Options, not available in REPL
-structure GoalDiag where
-  printContext: Bool := true
-  printValue: Bool := true
-  printNewMVars: Bool := false
-  -- Print all mvars
-  printAll: Bool := false
-  instantiate: Bool := true
-  printSexp: Bool := false
-
-
-/-- Executes the Lean compiler on a single file -/
-structure FrontendProcess where
-  -- One of these two must be supplied: Either supply the file name or the content.
-  fileName?: Option String := .none
-  file?: Option String := .none
-  -- If set to true, collect tactic invocations
-  invocations: Bool := false
-  -- If set to true, collect `sorry`s
-  sorrys: Bool := false
-  deriving Lean.FromJson
-structure InvokedTactic where
-  goalBefore: String
-  goalAfter: String
-  tactic: String
-
-  -- List of used constants
-  usedConstants: Array String
-  deriving Lean.ToJson
-
-structure CompilationUnit where
-  -- String boundaries of compilation units
-  boundary: (Nat × Nat)
-  -- Tactic invocations
-  invocations?: Option (List InvokedTactic) := .none
-  goalStateId?: Option Nat := .none
-  goals: Array Goal := #[]
-  messages: Array String := #[]
-  deriving Lean.ToJson
-structure FrontendProcessResult where
-  units: List CompilationUnit
-  deriving Lean.ToJson
-
-abbrev CR α := Except InteractionError α
-
-end Pantograph.Protocol

Pantograph/SemihashMap.lean

@@ -0,0 +1,149 @@
+
+namespace Pantograph.SemihashMap
+
+structure Imp (β: Type u) where
+  data: Array (Option β)
+
+  -- Number of elements currently in use
+  size: Nat
+
+  -- Next index that has never been touched
+  allocFront: Nat
+
+  -- Deallocated indices
+  deallocs: Array Nat
+
+  -- Number of valid entries in `deallocs` array
+  lastDealloc: Nat
+
+namespace Imp
+
+structure WF (m: Imp β): Prop where
+  capacity: m.data.size = m.deallocs.size
+  front_dealloc: ∀ i: Fin m.deallocs.size, (i < m.allocFront) → (m.deallocs.get i) < m.allocFront
+  front_data: ∀ i: Fin m.data.size, (i ≥ m.allocFront) → (m.data.get i).isNone
+
+def empty (capacity := 16): Imp β :=
+  {
+    data := mkArray capacity .none,
+    size := 0,
+    allocFront := 0,
+    deallocs := mkArray capacity 0,
+    lastDealloc := 0,
+  }
+
+private theorem list_get_replicate (x: α) (i: Fin (List.replicate n x).length):
+    List.get (List.replicate n x) i = x := by
+  sorry
+
+theorem empty_wf : WF (empty n: Imp β) := by
+  unfold empty
+  apply WF.mk
+  case capacity =>
+    conv =>
+      lhs
+      congr
+      simp
+    conv =>
+      rhs
+      congr
+      simp
+    simp
+  case front_dealloc =>
+    simp_all
+    intro i
+    intro a
+    contradiction
+  case front_data =>
+    simp_all
+    intro i
+    unfold Imp.data at i
+    simp at i
+    conv =>
+      lhs
+      unfold Array.get
+      unfold mkArray
+      simp [List.replicate]
+      rewrite [list_get_replicate]
+
+-- FIXME: Merge this with the well-formed versions below so proof and code can
+-- mesh seamlessly.
+@[inline] def insert (map: Imp β) (v: β): (Imp β × Nat) :=
+  match map.lastDealloc with
+  | 0 => -- Capacity is full, buffer expansion is required
+    if map.size == map.data.size then
+      let nextIndex := map.data.size
+      let extendCapacity := map.size
+      let result: Imp β := {
+        data := (map.data.append #[Option.some v]).append (mkArray extendCapacity .none),
+        size := map.size + 1,
+        allocFront := map.size + 1,
+        deallocs := mkArray (map.data.size + 1 + extendCapacity) 0,
+        lastDealloc := 0,
+      }
+      (result, nextIndex)
+    else
+      let nextIndex := map.size
+      let result: Imp β := {
+        map
+        with
+        data := map.data.set ⟨nextIndex, sorry⟩ (Option.some v),
+        size := map.size + 1,
+        allocFront := map.allocFront + 1,
+      }
+      (result, nextIndex)
+  | (.succ k) => -- Allocation list has space
+    let nextIndex := map.deallocs.get! k
+    let result: Imp β := {
+      map with
+      data := map.data.set ⟨nextIndex, sorry⟩ (Option.some v),
+      size := map.size + 1,
+      lastDealloc := map.lastDealloc - 1
+    }
+    (result, nextIndex)
+
+@[inline] def remove (map: Imp β) (index: Fin (map.size)): Imp β :=
+  have h: index.val < map.data.size := by sorry
+  match map.data.get ⟨index.val, h⟩ with
+  | .none => map
+  | .some _ =>
+    {
+      map with
+      data := map.data.set ⟨index, sorry⟩ .none,
+      size := map.size - 1,
+      deallocs := map.deallocs.set ⟨map.lastDealloc, sorry⟩ index,
+      lastDealloc := map.lastDealloc + 1,
+    }
+
+/-- Retrieval is efficient -/
+@[inline] def get? (map: Imp β) (index: Fin (map.size)): Option β :=
+  have h: index.val < map.data.size := by sorry
+  map.data.get ⟨index.val, h⟩
+@[inline] def capacity (map: Imp β): Nat := map.data.size
+
+end Imp
+
+
+/--
+This is like a hashmap but you cannot control the keys.
+-/
+def _root_.Pantograph.SemihashMap β := {m: Imp β // m.WF}
+
+@[inline] def empty (capacity := 16): SemihashMap β :=
+  ⟨ Imp.empty capacity, Imp.empty_wf ⟩
+@[inline] def insert (map: SemihashMap β) (v: β): (SemihashMap β × Nat) :=
+  let ⟨imp, pre⟩ := map
+  let ⟨result, id⟩ := imp.insert v
+  ( ⟨ result, sorry ⟩, id)
+@[inline] def remove (map: SemihashMap β) (index: Nat): SemihashMap β :=
+  let ⟨imp, pre⟩ := map
+  let result := imp.remove ⟨index, sorry⟩
+  ⟨ result, sorry ⟩
+@[inline] def get? (map: SemihashMap β) (index: Nat): Option β :=
+  let ⟨imp, _⟩ := map
+  imp.get? ⟨index, sorry⟩
+@[inline] def size (map: SemihashMap β): Nat :=
+  let ⟨imp, _⟩ := map
+  imp.size
+
+end Pantograph.SemihashMap

Pantograph/Serial.lean

@@ -1,214 +1,196 @@
 /-
-All serialisation functions;
-This replicates the behaviour of `Scope`s in `Lean/Elab/Command.lean` without
-using `Scope`s.
+All serialisation functions
 -/
 import Lean
-import Pantograph.Condensed
-import Pantograph.Expr
-import Pantograph.Goal
-import Pantograph.Protocol
 
-open Lean
-
--- Symbol processing functions --
+import Pantograph.Commands
 
 namespace Pantograph
-
+open Lean
 
 --- Input Functions ---
 
+
+/-- Read a theorem from the environment -/
+def expr_from_const (env: Environment) (name: Name): Except String Lean.Expr :=
+  match env.find? name with
+  | none       => throw s!"Symbol not found: {name}"
+  | some cInfo => return cInfo.type
 /-- Read syntax object from string -/
-def parseTerm (env: Environment) (s: String): Except String Syntax :=
+def syntax_from_str (env: Environment) (s: String): Except String Syntax :=
   Parser.runParserCategory
     (env := env)
     (catName := `term)
     (input := s)
     (fileName := "<stdin>")
 
-def parseTermM [Monad m] [MonadEnv m] (s: String): m (Except String Syntax) := do
-  return Parser.runParserCategory
-    (env := ← MonadEnv.getEnv)
-    (catName := `term)
-    (input := s)
-    (fileName := "<stdin>")
 
-/-- Parse a syntax object. May generate additional metavariables! -/
-def elabType (syn: Syntax): Elab.TermElabM (Except String Expr) := do
+def syntax_to_expr_type (syn: Syntax): Elab.TermElabM (Except String Expr) := do
   try
     let expr ← Elab.Term.elabType syn
+    -- Immediately synthesise all metavariables if we need to leave the elaboration context.
+    -- See https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Unknown.20universe.20metavariable/near/360130070
+    --Elab.Term.synthesizeSyntheticMVarsNoPostponing
+    let expr ← instantiateMVars expr
     return .ok expr
   catch ex => return .error (← ex.toMessageData.toString)
-def elabTerm (syn: Syntax) (expectedType? : Option Expr := .none): Elab.TermElabM (Except String Expr) := do
+def syntax_to_expr (syn: Syntax): Elab.TermElabM (Except String Expr) := do
   try
-    let expr ← Elab.Term.elabTerm (stx := syn) expectedType?
+    let expr ← Elab.Term.elabTerm (stx := syn) (expectedType? := .none)
+    -- Immediately synthesise all metavariables if we need to leave the elaboration context.
+    -- See https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Unknown.20universe.20metavariable/near/360130070
+    --Elab.Term.synthesizeSyntheticMVarsNoPostponing
+    let expr ← instantiateMVars expr
     return .ok expr
   catch ex => return .error (← ex.toMessageData.toString)
 
 
 --- Output Functions ---
 
-def typeExprToBound (expr: Expr): MetaM Protocol.BoundExpression := do
+def type_expr_to_bound (expr: Expr): MetaM Commands.BoundExpression := do
   Meta.forallTelescope expr fun arr body => do
     let binders ← arr.mapM fun fvar => do
       return (toString (← fvar.fvarId!.getUserName), toString (← Meta.ppExpr (← fvar.fvarId!.getType)))
     return { binders, target := toString (← Meta.ppExpr body) }
 
-def serializeName (name: Name) (sanitize: Bool := true): String :=
-  let internal := name.isInaccessibleUserName || name.hasMacroScopes
-  if sanitize && internal then "_"
-  else toString name |> addQuotes
-  where
-  addQuotes (n: String) :=
-    let quote := "\""
-    if n.contains Lean.idBeginEscape then s!"{quote}{n}{quote}" else n
+private def name_to_ast: Lean.Name → String
+  | .anonymous
+  | .num _ _ => ":anon"
+  | n@(.str _ _) => toString n
+
+private def level_depth: Level → Nat
+  | .zero => 0
+  | .succ l => 1 + (level_depth l)
+  | .max u v | .imax u v => 1 + max (level_depth u) (level_depth v)
+  | .param _ | .mvar _ => 0
+
+theorem level_depth_max_imax (u v: Level): (level_depth (Level.max u v) = level_depth (Level.imax u v)) := by
+  constructor
+theorem level_max_depth_decrease (u v: Level): (level_depth u < level_depth (Level.max u v)) := by
+  have h1: level_depth (Level.max u v) = 1 + Nat.max (level_depth u) (level_depth v) := by constructor
+  rewrite [h1]
+  simp_arith
+  conv =>
+    rhs
+    apply Nat.max_def
+  sorry
+theorem level_offset_decrease (u v: Level): (level_depth u ≤ level_depth (Level.max u v).getLevelOffset) := sorry
 
 /-- serialize a sort level. Expression is optimized to be compact e.g. `(+ u 2)` -/
-partial def serializeSortLevel (level: Level) (sanitize: Bool): String :=
+def serialize_sort_level_ast (level: Level): String :=
   let k := level.getOffset
   let u := level.getLevelOffset
   let u_str := match u with
     | .zero => "0"
     | .succ _ => panic! "getLevelOffset should not return .succ"
     | .max v w =>
-      let v := serializeSortLevel v sanitize
-      let w := serializeSortLevel w sanitize
+      let v := serialize_sort_level_ast v
+      let w := serialize_sort_level_ast w
       s!"(:max {v} {w})"
     | .imax v w =>
-      let v := serializeSortLevel v sanitize
-      let w := serializeSortLevel w sanitize
+      let v := serialize_sort_level_ast v
+      let w := serialize_sort_level_ast w
       s!"(:imax {v} {w})"
     | .param name =>
-      let name := serializeName name sanitize
+      let name := name_to_ast name
       s!"{name}"
     | .mvar id =>
-      let name := serializeName id.name sanitize
+      let name := name_to_ast id.name
       s!"(:mv {name})"
   match k, u with
   | 0, _ => u_str
   | _, .zero => s!"{k}"
   | _, _ => s!"(+ {u_str} {k})"
-
+  termination_by serialize_sort_level_ast level => level_depth level
+  decreasing_by
+  . sorry
 
 /--
  Completely serializes an expression tree. Json not used due to compactness
-
-A `_` symbol in the AST indicates automatic deductions not present in the original expression.
 -/
-partial def serializeExpressionSexp (expr: Expr) (sanitize: Bool := true): MetaM String := do
-  self expr
+def serialize_expression_ast (expr: Expr): MetaM String := do
+  match expr with
+  | .bvar deBruijnIndex =>
+    -- This is very common so the index alone is shown. Literals are handled below.
+    -- The raw de Bruijn index should never appear in an unbound setting. In
+    -- Lean these are handled using a `#` prefix.
+    return s!"{deBruijnIndex}"
+  | .fvar fvarId =>
+    let name := (← fvarId.getDecl).userName
+    return s!"(:fv {name})"
+  | .mvar mvarId =>
+    let name := name_to_ast mvarId.name
+    return s!"(:mv {name})"
+  | .sort level =>
+    let level := serialize_sort_level_ast level
+    return s!"(:sort {level})"
+  | .const declName _ =>
+    -- The universe level of the const expression is elided since it should be
+    -- inferrable from surrounding expression
+    return s!"(:c {declName})"
+  | .app fn arg =>
+    let fn' ← serialize_expression_ast fn
+    let arg' ← serialize_expression_ast arg
+    return s!"({fn'} {arg'})"
+  | .lam binderName binderType body binderInfo =>
+    let binderName' := name_to_ast binderName
+    let binderType' ← serialize_expression_ast binderType
+    let body' ← serialize_expression_ast body
+    let binderInfo' := binder_info_to_ast binderInfo
+    return s!"(:lambda {binderName'} {binderType'} {body'}{binderInfo'})"
+  | .forallE binderName binderType body binderInfo =>
+    let binderName' := name_to_ast binderName
+    let binderType' ← serialize_expression_ast binderType
+    let body' ← serialize_expression_ast body
+    let binderInfo' := binder_info_to_ast binderInfo
+    return s!"(:forall {binderName'} {binderType'} {body'}{binderInfo'})"
+  | .letE name type value body _ =>
+    -- Dependent boolean flag diacarded
+    let name' := name_to_ast name
+    let type' ← serialize_expression_ast type
+    let value' ← serialize_expression_ast value
+    let body' ← serialize_expression_ast body
+    return s!"(:let {name'} {type'} {value'} {body'})"
+  | .lit v =>
+    -- To not burden the downstream parser who needs to handle this, the literal
+    -- is wrapped in a :lit sexp.
+    let v' := match v with
+      | .natVal val => toString val
+      | .strVal val => s!"\"{val}\""
+    return s!"(:lit {v'})"
+  | .mdata _ expr =>
+    -- NOTE: Equivalent to expr itself, but mdata influences the prettyprinter
+    -- It may become necessary to incorporate the metadata.
+    return (← serialize_expression_ast expr)
+  | .proj typeName idx struct =>
+    let struct' ← serialize_expression_ast struct
+    return s!"(:proj {typeName} {idx} {struct'})"
+
   where
-  delayedMVarToSexp (e: Expr): MetaM (Option String) := do
-    let .some invocation ← toDelayedMVarInvocation e | return .none
-    let callee ← self $ .mvar invocation.mvarIdPending
-    let sites ← invocation.args.mapM (λ (fvarId, arg) => do
-        let arg := match arg with
-          | .some arg => arg
-          | .none => .fvar fvarId
-        self arg
-      )
-    let tailArgs ← invocation.tail.mapM self
-
-    let sites := " ".intercalate sites.toList
-    let result := if tailArgs.isEmpty then
-        s!"(:subst {callee} {sites})"
-      else
-        let tailArgs := " ".intercalate tailArgs.toList
-        s!"((:subst {callee} {sites}) {tailArgs})"
-    return .some result
-
-  self (e: Expr): MetaM String := do
-    if let .some result ← delayedMVarToSexp e then
-      return result
-    match e with
-    | .bvar deBruijnIndex =>
-      -- This is very common so the index alone is shown. Literals are handled below.
-      -- The raw de Bruijn index should never appear in an unbound setting. In
-      -- Lean these are handled using a `#` prefix.
-      pure s!"{deBruijnIndex}"
-    | .fvar fvarId =>
-      let name := ofName fvarId.name
-      pure s!"(:fv {name})"
-    | .mvar mvarId => do
-        let pref := if ← mvarId.isDelayedAssigned then "mvd" else "mv"
-        let name := ofName mvarId.name
-        pure s!"(:{pref} {name})"
-    | .sort level =>
-      let level := serializeSortLevel level sanitize
-      pure s!"(:sort {level})"
-    | .const declName _ =>
-      -- The universe level of the const expression is elided since it should be
-      -- inferrable from surrounding expression
-      pure s!"(:c {declName})"
-    | .app _ _ => do
-      let fn' ← self e.getAppFn
-      let args := (← e.getAppArgs.mapM self) |>.toList
-      let args := " ".intercalate args
-      pure s!"({fn'} {args})"
-    | .lam binderName binderType body binderInfo => do
-      let binderName' := ofName binderName
-      let binderType' ← self binderType
-      let body' ← self body
-      let binderInfo' := binderInfoSexp binderInfo
-      pure s!"(:lambda {binderName'} {binderType'} {body'}{binderInfo'})"
-    | .forallE binderName binderType body binderInfo => do
-      let binderName' := ofName binderName
-      let binderType' ← self binderType
-      let body' ← self body
-      let binderInfo' := binderInfoSexp binderInfo
-      pure s!"(:forall {binderName'} {binderType'} {body'}{binderInfo'})"
-    | .letE name type value body _ => do
-      -- Dependent boolean flag diacarded
-      let name' := serializeName name
-      let type' ← self type
-      let value' ← self value
-      let body' ← self body
-      pure s!"(:let {name'} {type'} {value'} {body'})"
-    | .lit v =>
-      -- To not burden the downstream parser who needs to handle this, the literal
-      -- is wrapped in a :lit sexp.
-      let v' := match v with
-        | .natVal val => toString val
-        | .strVal val => s!"\"{val}\""
-      pure s!"(:lit {v'})"
-    | .mdata _ inner =>
-      -- NOTE: Equivalent to expr itself, but mdata influences the prettyprinter
-      -- It may become necessary to incorporate the metadata.
-      self inner
-    | .proj _ _ _ => do
-      let env ← getEnv
-      let projApp := exprProjToApp env e
-      let autos := String.intercalate " " (List.replicate projApp.numParams "_")
-      let inner ← self projApp.inner
-      pure s!"((:c {projApp.projector}) {autos} {inner})"
   -- Elides all unhygenic names
-  binderInfoSexp : Lean.BinderInfo → String
+  binder_info_to_ast : Lean.BinderInfo → String
     | .default => ""
     | .implicit => " :implicit"
     | .strictImplicit => " :strictImplicit"
     | .instImplicit => " :instImplicit"
-  ofName (name: Name) := serializeName name sanitize
 
-def serializeExpression (options: @&Protocol.Options) (e: Expr): MetaM Protocol.Expression := do
-  let pp?: Option String ← match options.printExprPretty with
-    | true => pure $ .some $ toString $ ← Meta.ppExpr e
-    | false => pure $ .none
-  let sexp?: Option String ← match options.printExprAST with
-    | true => pure $ .some $ ← serializeExpressionSexp e
-    | false => pure $ .none
-  let dependentMVars? ← match options.printDependentMVars with
-    | true => pure $ .some $ (← Meta.getMVars e).map (λ mvarId => mvarId.name.toString)
-    | false => pure $ .none
+def serialize_expression (options: Commands.Options) (e: Expr): MetaM Commands.Expression := do
+  let pp := toString (← Meta.ppExpr e)
+  let pp?: Option String := match options.printExprPretty with
+      | true => .some pp
+      | false => .none
+  let sexp: String := (← serialize_expression_ast e)
+  let sexp?: Option String := match options.printExprAST with
+      | true => .some sexp
+      | false => .none
   return {
     pp?,
     sexp?
-    dependentMVars?,
   }
 
-
 /-- Adapted from ppGoal -/
-def serializeGoal (options: @&Protocol.Options) (goal: MVarId) (mvarDecl: MetavarDecl) (parentDecl?: Option MetavarDecl := .none)
-      : MetaM Protocol.Goal := do
+def serialize_goal (options: Commands.Options) (mvarDecl: MetavarDecl) (parentDecl?: Option MetavarDecl)
+      : MetaM Commands.Goal := do
   -- Options for printing; See Meta.ppGoal for details
   let showLetValues  := true
   let ppAuxDecls     := options.printAuxDecls
@@ -216,44 +198,39 @@ def serializeGoal (options: @&Protocol.Options) (goal: MVarId) (mvarDecl: Metava
   let lctx           := mvarDecl.lctx
   let lctx           := lctx.sanitizeNames.run' { options := (← getOptions) }
   Meta.withLCtx lctx mvarDecl.localInstances do
-    let ppVarNameOnly (localDecl: LocalDecl): MetaM Protocol.Variable := do
+    let ppVarNameOnly (localDecl: LocalDecl): MetaM Commands.Variable := do
       match localDecl with
-      | .cdecl _ fvarId userName _ _ _ =>
+      | .cdecl _ _ varName _ _ _ =>
+        let varName := varName.simpMacroScopes
         return {
-          name := ofName fvarId.name,
-          userName:= ofName userName.simpMacroScopes,
-          isInaccessible := userName.isInaccessibleUserName
+          name := toString varName,
         }
-      | .ldecl _ fvarId userName _ _ _ _ => do
+      | .ldecl _ _ varName _ _ _ _ => do
         return {
-          name := ofName fvarId.name,
-          userName := toString userName.simpMacroScopes,
-          isInaccessible := userName.isInaccessibleUserName
+          name := toString varName,
         }
-    let ppVar (localDecl : LocalDecl) : MetaM Protocol.Variable := do
+    let ppVar (localDecl : LocalDecl) : MetaM Commands.Variable := do
       match localDecl with
-      | .cdecl _ fvarId userName type _ _ =>
-        let userName := userName.simpMacroScopes
-        let type ← instantiate type
+      | .cdecl _ _ varName type _ _ =>
+        let varName := varName.simpMacroScopes
+        let type ← instantiateMVars type
         return {
-          name := ofName fvarId.name,
-          userName:= ofName userName,
-          isInaccessible := userName.isInaccessibleUserName
-          type? := .some (← serializeExpression options type)
+          name := toString varName,
+          isInaccessible? := .some varName.isInaccessibleUserName
+          type? := .some (← serialize_expression options type)
         }
-      | .ldecl _ fvarId userName type val _ _ => do
-        let userName := userName.simpMacroScopes
-        let type ← instantiate type
+      | .ldecl _ _ varName type val _ _ => do
+        let varName := varName.simpMacroScopes
+        let type ← instantiateMVars type
         let value? ← if showLetValues then
-          let val ← instantiate val
-          pure $ .some (← serializeExpression options val)
+          let val ← instantiateMVars val
+          pure $ .some (← serialize_expression options val)
         else
           pure $ .none
         return {
-          name := ofName fvarId.name,
-          userName:= ofName userName,
-          isInaccessible := userName.isInaccessibleUserName
-          type? := .some (← serializeExpression options type)
+          name := toString varName,
+          isInaccessible? := .some varName.isInaccessibleUserName
+          type? := .some (← serialize_expression options type)
           value? := value?
         }
     let vars ← lctx.foldlM (init := []) fun acc (localDecl : LocalDecl) => do
@@ -262,101 +239,21 @@ def serializeGoal (options: @&Protocol.Options) (goal: MVarId) (mvarDecl: Metava
       if skip then
         return acc
       else
-        let nameOnly := options.noRepeat && (parentDecl?.map
+        let nameOnly := options.proofVariableDelta && (parentDecl?.map
           (λ decl => decl.lctx.find? localDecl.fvarId |>.isSome) |>.getD false)
         let var ← match nameOnly with
           | true => ppVarNameOnly localDecl
           | false => ppVar localDecl
         return var::acc
     return {
-      name := ofName goal.name,
-      userName? := if mvarDecl.userName == .anonymous then .none else .some (ofName mvarDecl.userName),
-      isConversion := isLHSGoal? mvarDecl.type |>.isSome,
-      target := (← serializeExpression options (← instantiate mvarDecl.type)),
+      caseName? := match mvarDecl.userName with
+        | Name.anonymous => .none
+        | name => .some <| toString name,
+      isConversion := "| " == (Meta.getGoalPrefix mvarDecl)
+      target := (← serialize_expression options (← instantiateMVars mvarDecl.type)),
       vars := vars.reverse.toArray
     }
-  where
-  instantiate := instantiateAll
-  ofName (n: Name) := serializeName n (sanitize := false)
 
-protected def GoalState.serializeGoals
-      (state: GoalState)
-      (parent: Option GoalState := .none)
-      (options: @&Protocol.Options := {}):
-    MetaM (Array Protocol.Goal):= do
-  state.restoreMetaM
-  let goals := state.goals.toArray
-  let parentDecl? := parent.bind (λ parentState => parentState.mctx.findDecl? state.parentMVar?.get!)
-  goals.mapM fun goal => do
-    match state.mctx.findDecl? goal with
-    | .some mvarDecl =>
-      let serializedGoal ← serializeGoal options goal mvarDecl (parentDecl? := parentDecl?)
-      pure serializedGoal
-    | .none => throwError s!"Metavariable does not exist in context {goal.name}"
 
-/-- Print the metavariables in a readable format -/
-@[export pantograph_goal_state_diag_m]
-protected def GoalState.diag (goalState: GoalState) (parent?: Option GoalState := .none) (options: Protocol.GoalDiag := {}): CoreM String := do
-  let metaM: MetaM String := do
-    goalState.restoreMetaM
-    let savedState := goalState.savedState
-    let goals := savedState.tactic.goals
-    let mctx ← getMCtx
-    let root := goalState.root
-    -- Print the root
-    let result: String ← match mctx.decls.find? root with
-      | .some decl => printMVar ">" root decl
-      | .none => pure s!">{root.name}: ??"
-    let resultGoals ← goals.filter (· != root) |>.mapM (fun mvarId =>
-      match mctx.decls.find? mvarId with
-      | .some decl => printMVar "⊢" mvarId decl
-      | .none => pure s!"⊢{mvarId.name}: ??"
-    )
-    let goals := goals.toSSet
-    let resultOthers ← mctx.decls.toList.filter (λ (mvarId, _) =>
-        !(goals.contains mvarId || mvarId == root) && options.printAll)
-        |>.mapM (fun (mvarId, decl) => do
-          let pref := if parentHasMVar mvarId then " " else "~"
-          printMVar pref mvarId decl
-        )
-    pure $ result ++ "\n" ++ (resultGoals.map (· ++ "\n") |> String.join) ++ (resultOthers.map (· ++ "\n") |> String.join)
-  metaM.run' {}
-  where
-    printMVar (pref: String) (mvarId: MVarId) (decl: MetavarDecl): MetaM String := mvarId.withContext do
-      let resultFVars: List String ←
-        if options.printContext then
-          decl.lctx.fvarIdToDecl.toList.mapM (λ (fvarId, decl) =>
-            do pure $ (← printFVar fvarId decl) ++ "\n")
-        else
-          pure []
-      let type ← if options.instantiate
-        then instantiateAll decl.type
-        else pure $ decl.type
-      let type_sexp ← if options.printSexp then
-          let sexp ← serializeExpressionSexp type (sanitize := false)
-          pure <| " " ++ sexp
-        else
-          pure ""
-      let resultMain: String := s!"{pref}{mvarId.name}{userNameToString decl.userName}: {← Meta.ppExpr decl.type}{type_sexp}"
-      let resultValue: String ←
-        if options.printValue then
-          if let .some value ← getExprMVarAssignment? mvarId then
-            let value ← if options.instantiate
-              then instantiateAll value
-              else pure $ value
-            pure s!"\n := {← Meta.ppExpr value}"
-          else if let .some { mvarIdPending, .. } ← getDelayedMVarAssignment? mvarId then
-            pure s!"\n ::= {mvarIdPending.name}"
-          else
-            pure ""
-        else
-          pure ""
-      pure $ (String.join resultFVars) ++ resultMain ++ resultValue
-    printFVar (fvarId: FVarId) (decl: LocalDecl): MetaM String := do
-      pure s!" | {fvarId.name}{userNameToString decl.userName}: {← Meta.ppExpr decl.type}"
-    userNameToString : Name → String
-      | .anonymous => ""
-      | other => s!"[{other}]"
-    parentHasMVar (mvarId: MVarId): Bool := parent?.map (λ state => state.mctx.decls.contains mvarId) |>.getD true
 
 end Pantograph

Pantograph/Symbols.lean

@@ -0,0 +1,38 @@
+/-
+ - Manages the visibility status of symbols
+ -/
+import Lean.Declaration
+
+namespace Pantograph
+
+def str_to_name (s: String): Lean.Name :=
+  (s.splitOn ".").foldl Lean.Name.str Lean.Name.anonymous
+
+def is_symbol_unsafe_or_internal (n: Lean.Name) (info: Lean.ConstantInfo): Bool :=
+  let nameDeduce: Bool := match n.getRoot with
+  | .str _ name => name.startsWith "_" ∨ name == "Lean"
+  | _ => true
+  let stemDeduce: Bool := match n with
+  | .anonymous => true
+  | .str _ name => name.startsWith "_"
+  | .num _ _ => true
+  nameDeduce ∨ stemDeduce ∨ info.isUnsafe
+
+def to_compact_symbol_name (n: Lean.Name) (info: Lean.ConstantInfo): String :=
+  let pref := match info with
+  | .axiomInfo  _ => "axiom"
+  | .defnInfo   _ => "defn"
+  | .thmInfo    _ => "thm"
+  | .opaqueInfo _ => "opaque"
+  | .quotInfo   _ => "quot"
+  | .inductInfo _ => "induct"
+  | .ctorInfo   _ => "ctor"
+  | .recInfo    _ => "rec"
+  s!"{pref}|{toString n}"
+
+def to_filtered_symbol (n: Lean.Name) (info: Lean.ConstantInfo): Option String :=
+  if is_symbol_unsafe_or_internal n info
+  then Option.none
+  else Option.some <| to_compact_symbol_name n info
+
+end Pantograph

Pantograph/Tactic.lean

@@ -1,5 +1,102 @@
-import Pantograph.Tactic.Assign
-import Pantograph.Tactic.Congruence
-import Pantograph.Tactic.MotivatedApply
-import Pantograph.Tactic.NoConfuse
-import Pantograph.Tactic.Prograde
+import Lean
+
+import Pantograph.Symbols
+import Pantograph.Serial
+
+/-
+The proof state manipulation system
+
+A proof state is launched by providing
+1. Environment: `Environment`
+2. Expression: `Expr`
+The expression becomes the first meta variable in the saved tactic state
+`Elab.Tactic.SavedState`.
+From this point on, any proof which extends
+`Elab.Term.Context` and
+-/
+
+def Lean.MessageLog.getErrorMessages (log : MessageLog) : MessageLog :=
+  {
+    msgs := log.msgs.filter fun m => match m.severity with | MessageSeverity.error => true | _ => false
+  }
+
+
+namespace Pantograph
+open Lean
+
+structure GoalState where
+  mvarId: MVarId
+  savedState : Elab.Tactic.SavedState
+
+abbrev M := Elab.TermElabM
+
+def GoalState.create (expr: Expr): M GoalState := do
+  let expr ← instantiateMVars expr
+  let goal := (← Meta.mkFreshExprMVar expr (kind := MetavarKind.synthetic))
+  let savedStateMonad: Elab.Tactic.TacticM Elab.Tactic.SavedState := MonadBacktrack.saveState
+  let savedState ← savedStateMonad { elaborator := .anonymous } |>.run' { goals := [goal.mvarId!]}
+  return {
+    savedState := savedState,
+    mvarId := goal.mvarId!
+  }
+
+def execute_tactic (state: Elab.Tactic.SavedState) (goal: MVarId) (tactic: String) :
+    M (Except (Array String) (Elab.Tactic.SavedState × List MVarId)):= do
+  let tacticM (stx: Syntax):  Elab.Tactic.TacticM (Except (Array String) (Elab.Tactic.SavedState × List MVarId)) := do
+    state.restore
+    Elab.Tactic.setGoals [goal]
+    try
+      Elab.Tactic.evalTactic stx
+      if (← getThe Core.State).messages.hasErrors then
+        let messages := (← getThe Core.State).messages.getErrorMessages |>.toList.toArray
+        let errors ← (messages.map Message.data).mapM fun md => md.toString
+        return .error errors
+      else
+        return .ok (← MonadBacktrack.saveState, ← Elab.Tactic.getUnsolvedGoals)
+    catch exception =>
+      return .error #[← exception.toMessageData.toString]
+  match Parser.runParserCategory
+    (env := ← MonadEnv.getEnv)
+    (catName := `tactic)
+    (input := tactic)
+    (fileName := "<stdin>") with
+  | Except.error err => return .error #[err]
+  | Except.ok stx    => tacticM stx { elaborator := .anonymous } |>.run' state.tactic
+
+/-- Response for executing a tactic -/
+inductive TacticResult where
+  -- Goes to next state
+  | success (goals: Array (GoalState × Commands.Goal))
+  -- Fails with messages
+  | failure (messages: Array String)
+
+namespace TacticResult
+
+def is_success: TacticResult → Bool
+  | .success _ => true
+  | .failure _ => false
+
+end TacticResult
+
+/-- Execute tactic on given state -/
+def GoalState.execute (goal: GoalState) (tactic: String):
+    Commands.OptionsT M TacticResult := do
+  let options ← read
+  match (← execute_tactic (state := goal.savedState) (goal := goal.mvarId) (tactic := tactic)) with
+  | .error errors =>
+    return .failure errors
+  | .ok (nextState, nextGoals) =>
+    if nextGoals.isEmpty then
+      return .success #[]
+    else
+      let nextGoals: List GoalState := nextGoals.map fun mvarId => { mvarId, savedState := nextState }
+      let parentDecl? := (← MonadMCtx.getMCtx).findDecl? goal.mvarId
+      let goals ← nextGoals.mapM fun nextGoal => do
+        match (← MonadMCtx.getMCtx).findDecl? nextGoal.mvarId with
+        | .some mvarDecl =>
+          let serializedGoal ← serialize_goal options mvarDecl (parentDecl? := parentDecl?)
+          return (nextGoal, serializedGoal)
+        | .none => throwError nextGoal.mvarId
+      return .success goals.toArray
+
+end Pantograph

Pantograph/Tactic/Assign.lean

@@ -1,31 +0,0 @@
-import Lean
-
-open Lean
-
-namespace Pantograph.Tactic
-
-/-- WARNING: This should be used with a function like `elabTermWithHoles` that properly collects the mvar information from `expr`. -/
-def assign (goal: MVarId) (expr: Expr) (nextGoals: List MVarId): MetaM (List MVarId) := do
-  goal.checkNotAssigned `Pantograph.Tactic.assign
-
-  -- This run of the unifier is critical in resolving mvars in passing
-  let exprType ← Meta.inferType expr
-  let goalType ← goal.getType
-  unless ← Meta.isDefEq goalType exprType do
-    throwError s!"{← Meta.ppExpr expr} : {← Meta.ppExpr exprType} ≠ {← Meta.ppExpr goalType}"
-  goal.assign expr
-  nextGoals.filterM (not <$> ·.isAssigned)
-
-def evalAssign : Elab.Tactic.Tactic := fun stx => Elab.Tactic.withMainContext do
-  let target ← Elab.Tactic.getMainTarget
-  let goal ← Elab.Tactic.getMainGoal
-  goal.checkNotAssigned `Pantograph.Tactic.evalAssign
-  let (expr, nextGoals) ← Elab.Tactic.elabTermWithHoles stx
-    (expectedType? := .some target)
-    (tagSuffix := .anonymous )
-    (allowNaturalHoles := true)
-  goal.assign expr
-  Elab.Tactic.replaceMainGoal nextGoals
-
-
-end Pantograph.Tactic

Pantograph/Tactic/Congruence.lean

@@ -1,98 +0,0 @@
-import Lean
-
-open Lean
-
-namespace Pantograph.Tactic
-
-def congruenceArg (mvarId: MVarId): MetaM (List MVarId) := mvarId.withContext do
-  mvarId.checkNotAssigned `Pantograph.Tactic.congruenceArg
-  let target ← mvarId.getType
-  let .some (β, _, _) := (← instantiateMVars target).eq? | throwError "Goal is not an Eq"
-  let userName := (← mvarId.getDecl).userName
-
-  let u ← Meta.mkFreshLevelMVar
-  let α ← Meta.mkFreshExprSyntheticOpaqueMVar (mkSort u)
-    (tag := userName ++ `α)
-  let f ← Meta.mkFreshExprSyntheticOpaqueMVar (.forallE .anonymous α β .default)
-    (tag := userName ++ `f)
-  let a₁ ← Meta.mkFreshExprSyntheticOpaqueMVar α
-    (tag := userName ++ `a₁)
-  let a₂ ← Meta.mkFreshExprSyntheticOpaqueMVar α
-    (tag := userName ++ `a₂)
-  let h ← Meta.mkFreshExprSyntheticOpaqueMVar (← Meta.mkEq a₁ a₂)
-    (tag := userName ++ `h)
-  let conduitType ← Meta.mkEq (← Meta.mkEq (.app f a₁) (.app f a₂)) target
-  let conduit ← Meta.mkFreshExprSyntheticOpaqueMVar conduitType
-    (tag := userName ++ `conduit)
-  mvarId.assign $ ← Meta.mkEqMP conduit (← Meta.mkCongrArg f h)
-  let result := [α, a₁, a₂, f,  h, conduit]
-  return result.map (·.mvarId!)
-
-def evalCongruenceArg: Elab.Tactic.TacticM Unit := do
-  let goal ← Elab.Tactic.getMainGoal
-  let nextGoals ← congruenceArg goal
-  Elab.Tactic.replaceMainGoal nextGoals
-
-def congruenceFun (mvarId: MVarId): MetaM (List MVarId) := mvarId.withContext do
-  mvarId.checkNotAssigned `Pantograph.Tactic.congruenceFun
-  let target ← mvarId.getType
-  let .some (β, _, _) := (← instantiateMVars target).eq? | throwError "Goal is not an Eq"
-  let userName := (← mvarId.getDecl).userName
-  let u ← Meta.mkFreshLevelMVar
-  let α ← Meta.mkFreshExprSyntheticOpaqueMVar (mkSort u)
-    (tag := userName ++ `α)
-  let fType := .forallE .anonymous α β .default
-  let f₁ ← Meta.mkFreshExprSyntheticOpaqueMVar fType
-    (tag := userName ++ `f₁)
-  let f₂ ← Meta.mkFreshExprSyntheticOpaqueMVar fType
-    (tag := userName ++ `f₂)
-  let a ← Meta.mkFreshExprSyntheticOpaqueMVar α
-    (tag := userName ++ `a)
-  let h ← Meta.mkFreshExprSyntheticOpaqueMVar (← Meta.mkEq f₁ f₂)
-    (tag := userName ++ `h)
-  let conduitType ← Meta.mkEq (← Meta.mkEq (.app f₁ a) (.app f₂ a)) target
-  let conduit ← Meta.mkFreshExprSyntheticOpaqueMVar conduitType
-    (tag := userName ++ `conduit)
-  mvarId.assign $ ← Meta.mkEqMP conduit (← Meta.mkCongrFun h a)
-  let result := [α, f₁, f₂, h, a, conduit]
-  return result.map (·.mvarId!)
-
-def evalCongruenceFun: Elab.Tactic.TacticM Unit := do
-  let goal ← Elab.Tactic.getMainGoal
-  let nextGoals ← congruenceFun goal
-  Elab.Tactic.replaceMainGoal nextGoals
-
-def congruence (mvarId: MVarId): MetaM (List MVarId) := mvarId.withContext do
-  mvarId.checkNotAssigned `Pantograph.Tactic.congruence
-  let target ← mvarId.getType
-  let .some (β, _, _) := (← instantiateMVars target).eq? | throwError "Goal is not an Eq"
-  let userName := (← mvarId.getDecl).userName
-  let u ← Meta.mkFreshLevelMVar
-  let α ← Meta.mkFreshExprSyntheticOpaqueMVar (mkSort u)
-    (tag := userName ++ `α)
-  let fType := .forallE .anonymous α β .default
-  let f₁ ← Meta.mkFreshExprSyntheticOpaqueMVar fType
-    (tag := userName ++ `f₁)
-  let f₂ ← Meta.mkFreshExprSyntheticOpaqueMVar fType
-    (tag := userName ++ `f₂)
-  let a₁ ← Meta.mkFreshExprSyntheticOpaqueMVar α
-    (tag := userName ++ `a₁)
-  let a₂ ← Meta.mkFreshExprSyntheticOpaqueMVar α
-    (tag := userName ++ `a₂)
-  let h₁ ← Meta.mkFreshExprSyntheticOpaqueMVar (← Meta.mkEq f₁ f₂)
-    (tag := userName ++ `h₁)
-  let h₂ ← Meta.mkFreshExprSyntheticOpaqueMVar (← Meta.mkEq a₁ a₂)
-    (tag := userName ++ `h₂)
-  let conduitType ← Meta.mkEq (← Meta.mkEq (.app f₁ a₁) (.app f₂ a₂)) target
-  let conduit ← Meta.mkFreshExprSyntheticOpaqueMVar conduitType
-    (tag := userName ++ `conduit)
-  mvarId.assign $ ← Meta.mkEqMP conduit (← Meta.mkCongr h₁ h₂)
-  let result := [α, f₁, f₂, a₁, a₂, h₁, h₂, conduit]
-  return result.map (·.mvarId!)
-
-def evalCongruence: Elab.Tactic.TacticM Unit := do
-  let goal ← Elab.Tactic.getMainGoal
-  let nextGoals ← congruence goal
-  Elab.Tactic.replaceMainGoal nextGoals
-
-end Pantograph.Tactic

Pantograph/Tactic/MotivatedApply.lean

@@ -1,106 +0,0 @@
-import Lean
-
-open Lean
-
-namespace Pantograph.Tactic
-
-def getForallArgsBody: Expr → List Expr × Expr
-  | .forallE _ d b _ =>
-    let (innerArgs, innerBody) := getForallArgsBody b
-    (d :: innerArgs, innerBody)
-  | e => ([], e)
-
-def replaceForallBody: Expr → Expr → Expr
-  | .forallE param domain body binderInfo, target =>
-    let body := replaceForallBody body target
-    .forallE param domain body binderInfo
-  | _, target => target
-
-structure RecursorWithMotive where
-  args: List Expr
-  body: Expr
-
-  -- .bvar index for the motive and major from the body
-  iMotive: Nat
-
-namespace RecursorWithMotive
-
-protected def nArgs (info: RecursorWithMotive): Nat := info.args.length
-
-protected def getMotiveType (info: RecursorWithMotive): Expr :=
-  let level := info.nArgs - info.iMotive - 1
-  let a := info.args.get! level
-  a
-
-protected def surrogateMotiveType (info: RecursorWithMotive) (mvars: Array Expr) (resultant: Expr): MetaM Expr := do
-  let motiveType := Expr.instantiateRev info.getMotiveType mvars
-  let resultantType ← Meta.inferType resultant
-  return replaceForallBody motiveType resultantType
-
-protected def conduitType (info: RecursorWithMotive) (mvars: Array Expr) (resultant: Expr): MetaM Expr := do
-  let motiveCall := Expr.instantiateRev info.body mvars
-  Meta.mkEq motiveCall resultant
-
-end RecursorWithMotive
-
-def getRecursorInformation (recursorType: Expr): Option RecursorWithMotive := do
-  let (args, body) := getForallArgsBody recursorType
-  if ¬ body.isApp then
-    .none
-  let iMotive ← match body.getAppFn with
-    | .bvar iMotive => pure iMotive
-    | _ => .none
-  return {
-    args,
-    body,
-    iMotive,
-  }
-
-def collectMotiveArguments (forallBody: Expr): SSet Nat :=
-  match forallBody with
-  | .app (.bvar i) _ => SSet.empty.insert i
-  | _ => SSet.empty
-
-/-- Applies a symbol of the type `∀ (motive: α → Sort u) (a: α)..., (motive α)` -/
-def motivatedApply (mvarId: MVarId) (recursor: Expr) : MetaM (Array Meta.InductionSubgoal) := mvarId.withContext do
-  mvarId.checkNotAssigned `Pantograph.Tactic.motivatedApply
-  let recursorType ← Meta.inferType recursor
-  let resultant ← mvarId.getType
-  let tag ← mvarId.getTag
-
-  let info ← match getRecursorInformation recursorType with
-    | .some info => pure info
-    | .none => throwError "Recursor return type does not correspond with the invocation of a motive: {← Meta.ppExpr recursorType}"
-
-  let rec go (i: Nat) (prev: Array Expr): MetaM (Array Expr) := do
-    if i ≥ info.nArgs then
-      return prev
-    else
-      let argType := info.args.get! i
-      -- If `argType` has motive references, its goal needs to be placed in it
-      let argType := argType.instantiateRev prev
-      let bvarIndex := info.nArgs - i - 1
-      let argGoal ← if bvarIndex = info.iMotive then
-          let surrogateMotiveType ← info.surrogateMotiveType prev resultant
-          Meta.mkFreshExprSyntheticOpaqueMVar surrogateMotiveType (tag := tag ++ `motive)
-        else
-          Meta.mkFreshExprSyntheticOpaqueMVar argType (tag := .anonymous)
-      let prev :=  prev ++ [argGoal]
-      go (i + 1) prev
-    termination_by info.nArgs - i
-  let mut newMVars ← go 0 #[]
-
-  -- Create the conduit type which proves the result of the motive is equal to the goal
-  let conduitType ← info.conduitType newMVars resultant
-  let goalConduit ← Meta.mkFreshExprSyntheticOpaqueMVar conduitType (tag := `conduit)
-  mvarId.assign $ ← Meta.mkEqMP goalConduit (mkAppN recursor newMVars)
-  newMVars := newMVars ++ [goalConduit]
-
-  return newMVars.map (λ mvar => { mvarId := mvar.mvarId!})
-
-def evalMotivatedApply : Elab.Tactic.Tactic := fun stx => Elab.Tactic.withMainContext do
-  let recursor ← Elab.Term.elabTerm (stx := stx) .none
-  let nextGoals ← motivatedApply (← Elab.Tactic.getMainGoal) recursor
-  Elab.Tactic.replaceMainGoal $ nextGoals.toList.map (·.mvarId)
-
-end Pantograph.Tactic

Pantograph/Tactic/NoConfuse.lean

@@ -1,22 +0,0 @@
-import Lean
-
-open Lean
-
-namespace Pantograph.Tactic
-
-def noConfuse (mvarId: MVarId) (h: Expr): MetaM Unit := mvarId.withContext do
-  mvarId.checkNotAssigned `Pantograph.Tactic.noConfuse
-  let target ← mvarId.getType
-  let noConfusion ← Meta.mkNoConfusion (target := target) (h := h)
-
-  unless ← Meta.isDefEq (← Meta.inferType noConfusion) target do
-    throwError "invalid noConfuse call: The resultant type {← Meta.ppExpr $ ← Meta.inferType noConfusion} cannot be unified with {← Meta.ppExpr target}"
-  mvarId.assign noConfusion
-
-def evalNoConfuse: Elab.Tactic.Tactic := λ stx => do
-  let goal ← Elab.Tactic.getMainGoal
-  let h ← goal.withContext $ Elab.Term.elabTerm (stx := stx) .none
-  noConfuse goal h
-  Elab.Tactic.replaceMainGoal []
-
-end Pantograph.Tactic

Pantograph/Tactic/Prograde.lean

@@ -1,88 +0,0 @@
-/- Prograde (forward) reasoning tactics -/
-
-import Lean
-open Lean
-
-namespace Pantograph.Tactic
-
-private def mkUpstreamMVar (goal: MVarId) : MetaM Expr := do
-  Meta.mkFreshExprSyntheticOpaqueMVar (← goal.getType) (tag := ← goal.getTag)
-
-
-/-- Introduces a fvar to the current mvar -/
-def define (mvarId: MVarId) (binderName: Name) (expr: Expr): MetaM (FVarId × MVarId) := mvarId.withContext do
-  mvarId.checkNotAssigned `Pantograph.Tactic.define
-  let type ← Meta.inferType expr
-
-  Meta.withLetDecl binderName type expr λ fvar => do
-    let mvarUpstream ← mkUpstreamMVar mvarId
-    mvarId.assign $ ← Meta.mkLetFVars #[fvar] mvarUpstream
-    pure (fvar.fvarId!, mvarUpstream.mvarId!)
-
-def evalDefine (binderName: Name) (expr: Syntax): Elab.Tactic.TacticM Unit := do
-  let goal ← Elab.Tactic.getMainGoal
-  let expr ← goal.withContext $ Elab.Term.elabTerm (stx := expr) (expectedType? := .none)
-  let (_, mvarId) ← define goal binderName expr
-  Elab.Tactic.replaceMainGoal [mvarId]
-
-structure BranchResult where
-  fvarId?: Option FVarId := .none
-  branch: MVarId
-  main: MVarId
-
-def «have» (mvarId: MVarId) (binderName: Name) (type: Expr): MetaM BranchResult := mvarId.withContext do
-  mvarId.checkNotAssigned `Pantograph.Tactic.have
-  let lctx ← MonadLCtx.getLCtx
-  -- The branch goal inherits the same context, but with a different type
-  let mvarBranch ← Meta.mkFreshExprMVarAt lctx (← Meta.getLocalInstances) type
-
-  -- Create the context for the `upstream` goal
-  let fvarId ← mkFreshFVarId
-  let lctxUpstream := lctx.mkLocalDecl fvarId binderName type
-  let mvarUpstream ←
-    withTheReader Meta.Context (fun ctx => { ctx with lctx := lctxUpstream }) do
-      Meta.withNewLocalInstances #[.fvar fvarId] 0 do
-        let mvarUpstream ← mkUpstreamMVar mvarId
-        --let expr: Expr := .app (.lam binderName type mvarBranch .default) mvarUpstream
-        mvarId.assign $ ← Meta.mkLambdaFVars #[.fvar fvarId] mvarUpstream
-        pure mvarUpstream
-
-  return {
-    fvarId? := .some fvarId,
-    branch := mvarBranch.mvarId!,
-    main := mvarUpstream.mvarId!,
-  }
-
-def evalHave (binderName: Name) (type: Syntax): Elab.Tactic.TacticM Unit := do
-  let goal ← Elab.Tactic.getMainGoal
-  let nextGoals: List MVarId ← goal.withContext do
-    let type ← Elab.Term.elabType (stx := type)
-    let result ← «have» goal binderName type
-    pure [result.branch, result.main]
-  Elab.Tactic.replaceMainGoal nextGoals
-
-def «let» (mvarId: MVarId) (binderName: Name) (type: Expr): MetaM BranchResult := mvarId.withContext do
-  mvarId.checkNotAssigned `Pantograph.Tactic.let
-  let lctx ← MonadLCtx.getLCtx
-
-  -- The branch goal inherits the same context, but with a different type
-  let mvarBranch ← Meta.mkFreshExprMVarAt lctx (← Meta.getLocalInstances) type (userName := binderName)
-
-  assert! ¬ type.hasLooseBVars
-  let mvarUpstream ← Meta.withLetDecl binderName type mvarBranch $ λ fvar => do
-    let mvarUpstream ← mkUpstreamMVar mvarId
-    mvarId.assign $ ← Meta.mkLetFVars #[fvar] mvarUpstream
-    pure mvarUpstream
-
-  return {
-    branch := mvarBranch.mvarId!,
-    main := mvarUpstream.mvarId!,
-  }
-
-def evalLet (binderName: Name) (type: Syntax): Elab.Tactic.TacticM Unit := do
-  let goal ← Elab.Tactic.getMainGoal
-  let type ← goal.withContext $ Elab.Term.elabType (stx := type)
-  let result ← «let» goal binderName type
-  Elab.Tactic.replaceMainGoal [result.branch, result.main]
-
-end Pantograph.Tactic

Pantograph/Version.lean

@@ -1,6 +1,5 @@
 namespace Pantograph
 
-@[export pantograph_version]
-def version := "0.2.19"
+def version := "0.2.5"
 
 end Pantograph

README.md

@@ -1,30 +1,29 @@
 # Pantograph
 
-A Machine-to-Machine interaction system for Lean 4.
+An interaction system for Lean 4.
 
 ![Pantograph](doc/icon.svg)
 
-Pantograph provides interfaces to execute proofs, construct expressions, and
-examine the symbol list of a Lean project for machine learning.
-
 ## Installation
 
-For Nix users, run
-``` sh
-nix build .#{sharedLib,executable}
-```
-to build either the shared library or executable.
-
-Install `elan` and `lake`, and run
+Install `elan` and `lean4`. Then, execute
 ``` sh
 lake build
 ```
-This builds the executable in `.lake/build/bin/pantograph-repl`.
+Then, setup the `LEAN_PATH` environment variable so it contains the library path of lean libraries. The libraries must be built in advance. For example, if `mathlib4` is stored at `../lib/mathlib4`,
+``` sh
+LIB="../lib"
+LIB_MATHLIB="$LIB/mathlib4/lake-packages"
+export LEAN_PATH="$LIB/mathlib4/build/lib:$LIB_MATHLIB/aesop/build/lib:$LIB_MATHLIB/Qq/build/lib:$LIB_MATHLIB/std/build/lib"
 
-## Executable Usage
+LEAN_PATH=$LEAN_PATH build/bin/pantograph $@
+```
+Note that `lean-toolchain` must be present in the `$PWD` in order to run Pantograph! This is because Pantograph taps into Lean's internals.
+
+## Usage
 
 ``` sh
-pantograph MODULES|LEAN_OPTIONS
+build/bin/pantograph MODULES|LEAN_OPTIONS
 ```
 
 The REPL loop accepts commands as single-line JSON inputs and outputs either an
@@ -34,84 +33,59 @@ result of a command execution.  The command can be passed in one of two formats
 command { ... }
 { "cmd": command, "payload": ... }
 ```
-The list of available commands can be found in `Pantograph/Protocol.lean` and below. An
+The list of available commands can be found in `Pantograph/Commands.lean` and below. An
 empty command aborts the REPL.
 
-The `pantograph` executable must be run with a list of modules to import. It can
+The `Pantograph` executable must be run with a list of modules to import. It can
 also accept lean options of the form `--key=value` e.g. `--pp.raw=true`.
 
 Example: (~5k symbols)
 ```
-$ pantograph Init
-env.catalog
-env.inspect {"name": "Nat.le_add_left"}
+$ build/bin/Pantograph Init
+lib.catalog
+lib.inspect {"name": "Nat.le_add_left"}
 ```
 Example with `mathlib4` (~90k symbols, may stack overflow, see troubleshooting)
 ```
-$ pantograph Mathlib.Analysis.Seminorm
-env.catalog
+$ lake env build/bin/Pantograph Mathlib.Analysis.Seminorm
+lib.catalog
 ```
 Example proving a theorem: (alternatively use `goal.start {"copyFrom": "Nat.add_comm"}`) to prime the proof
 ```
-$ pantograph Init
+$ env build/bin/Pantograph Init
 goal.start {"expr": "∀ (n m : Nat), n + m = m + n"}
-goal.tactic {"stateId": 0, "goalId": 0, "tactic": "intro n m"}
-goal.tactic {"stateId": 1, "goalId": 0, "tactic": "assumption"}
-goal.delete {"stateIds": [0]}
+goal.tactic {"goalId": 0, "tactic": "intro n m"}
+goal.tactic {"goalId": 1, "tactic": "assumption"}
+goal.delete {"goalIds": [0]}
 stat {}
-goal.tactic {"stateId": 1, "goalId": 0, "tactic": "rw [Nat.add_comm]"}
+goal.tactic {"goalId": 1, "tactic": "rw [Nat.add_comm]"}
 stat
 ```
 where the application of `assumption` should lead to a failure.
 
-### Commands
+## Commands
 
-See `Pantograph/Protocol.lean` for a description of the parameters and return values in JSON.
-* `reset`: Delete all cached expressions and proof trees
-* `stat`: Display resource usage
-* `expr.echo {"expr": <expr>, "type": <optional expected type>, ["levels": [<levels>]]}`: Determine the
-  type of an expression and format it.
-* `env.catalog`: Display a list of all safe Lean symbols in the current environment
-* `env.inspect {"name": <name>, "value": <bool>}`: Show the type and package of a
+See `Pantograph/Commands.lean` for a description of the parameters and return values in JSON.
+- `reset`: Delete all cached expressions and proof trees
+- `expr.echo {"expr": <expr>}`: Determine the type of an expression and round-trip it
+- `lib.catalog`: Display a list of all safe Lean symbols in the current context
+- `lib.inspect {"name": <name>, "value": <bool>}`: Show the type and package of a
   given symbol; If value flag is set, the value is printed or hidden. By default
   only the values of definitions are printed.
-* `options.set { key: value, ... }`: Set one or more options (not Lean options; those
-  have to be set via command line arguments.), for options, see `Pantograph/Protocol.lean`
+- `options.set { key: value, ... }`: Set one or more options (not Lean options; those
+  have to be set via command line arguments.), for options, see `Pantograph/Commands.lean`
+- `options.print`: Display the current set of options
+- `goal.start {["name": <name>], ["expr": <expr>], ["copyFrom": <symbol>]}`: Start a new goal from a given expression or symbol
+- `goal.tactic {"goalId": <id>, "tactic": <tactic>}`: Execute a tactic string on a given goal
+- `goal.remove {"goalIds": [<id>]}"`: Remove a bunch of stored goals.
+- `stat`: Display resource usage
 
-  One particular option for interest for machine learning researchers is the
-  automatic mode (flag: `"automaticMode"`).  By default it is turned on, with
-  all goals automatically resuming. This makes Pantograph act like a gym,
-  with no resumption necessary to manage your goals.
-* `options.print`: Display the current set of options
-* `goal.start {["name": <name>], ["expr": <expr>], ["levels": [<levels>]], ["copyFrom": <symbol>]}`:
-  Start a new proof from a given expression or symbol
-* `goal.tactic {"stateId": <id>, "goalId": <id>, ...}`: Execute a tactic string on a
-  given goal. The tactic is supplied as additional key-value pairs in one of the following formats:
-  - `{ "tactic": <tactic> }`: Execute an ordinary tactic
-  - `{ "expr": <expr> }`: Assign the given proof term to the current goal
-  - `{ "have": <expr>, "binderName": <name> }`: Execute `have` and creates a branch goal
-  - `{ "calc": <expr> }`: Execute one step of a `calc` tactic. Each step must
-    be of the form `lhs op rhs`. An `lhs` of `_` indicates that it should be set
-    to the previous `rhs`.
-  - `{ "conv": <bool> }`: Enter or exit conversion tactic mode. In the case of
-    exit, the goal id is ignored.
-* `goal.continue {"stateId": <id>, ["branch": <id>], ["goals": <names>]}`:
-  Execute continuation/resumption
-  - `{ "branch": <id> }`: Continue on branch state. The current state must have no goals.
-  - `{ "goals": <names> }`: Resume the given goals
-* `goal.remove {"stateIds": [<id>]}"`: Drop the goal states specified in the list
-* `goal.print {"stateId": <id>}"`: Print a goal state
-* `frontend.process { ["fileName": <fileName>",] ["file": <str>], invocations:
-  <bool>, sorrys: <bool> }`: Executes the Lean frontend on a file, collecting
-  either the tactic invocations (`"invocations": true`) or the sorrys into goal
-  states (`"sorrys": true`)
-
-### Errors
+## Errors
 
 When an error pertaining to the execution of a command happens, the returning JSON structure is
 
 ``` json
-{ "error": "type", "desc": "description" }
+{ error: "type", desc: "description" }
 ```
 Common error forms:
 * `command`: Indicates malformed command structure which results from either
@@ -121,60 +95,16 @@ Common error forms:
   input of another is broken. For example, attempting to query a symbol not
   existing in the library or indexing into a non-existent proof state.
 
-### Project Environment
-
-To use Pantograph in a project environment, setup the `LEAN_PATH` environment
-variable so it contains the library path of lean libraries. The libraries must
-be built in advance. For example, if `mathlib4` is stored at `../lib/mathlib4`,
-the environment might be setup like this:
-
-``` sh
-LIB="../lib"
-LIB_MATHLIB="$LIB/mathlib4/lake-packages"
-export LEAN_PATH="$LIB/mathlib4/build/lib:$LIB_MATHLIB/aesop/build/lib:$LIB_MATHLIB/Qq/build/lib:$LIB_MATHLIB/std/build/lib"
-
-LEAN_PATH=$LEAN_PATH build/bin/pantograph $@
-```
-The `$LEAN_PATH` executable of any project can be extracted by
-``` sh
-lake env printenv LEAN_PATH
-```
-
-### Troubleshooting
+## Troubleshooting
 
 If lean encounters stack overflow problems when printing catalog, execute this before running lean:
 ```sh
 ulimit -s unlimited
 ```
 
-## Library Usage
+## Testing
 
-`Pantograph/Library.lean` exposes a series of interfaces which allow FFI call
-with `Pantograph` which mirrors the REPL commands above. It is recommended to
-call Pantograph via this FFI since it provides a tremendous speed up.
-
-The executable can be used as-is, but linking against the shared library
-requires the presence of `lean-all`. Note that there isn't a 1-1 correspondence
-between executable (REPL) commands and library functions.
-
-Inject any project path via the `pantograph_init_search` function.
-
-## Developing
-
-A Lean development shell is provided in the Nix flake.
-
-### Testing
-
-The tests are based on `LSpec`. To run tests, use either
+The tests are based on `LSpec`. To run tests,
 ``` sh
-nix flake check
-```
-or
-``` sh
-lake test
-```
-You can run an individual test by specifying a prefix
-
-``` sh
-lake test -- "Tactic/No Confuse"
+test/all.sh
 ```

Repl.lean

@@ -1,260 +0,0 @@
-import Std.Data.HashMap
-import Pantograph
-
-namespace Pantograph.Repl
-
-structure Context where
-  imports: List String
-
-/-- Stores state of the REPL -/
-structure State where
-  options: Protocol.Options := {}
-  nextId: Nat := 0
-  goalStates: Std.HashMap Nat GoalState := Std.HashMap.empty
-
-/-- Main state monad for executing commands -/
-abbrev MainM := ReaderT Context (StateT State Lean.CoreM)
-
--- HACK: For some reason writing `CommandM α := MainM (Except ... α)` disables
--- certain monadic features in `MainM`
-abbrev CR α := Except Protocol.InteractionError α
-
-def runMetaInMainM { α } (metaM: Lean.MetaM α): MainM α :=
-  metaM.run'
-def runTermElabInMainM { α } (termElabM: Lean.Elab.TermElabM α) : MainM α :=
-  termElabM.run' (ctx := Condensed.elabContext) |>.run'
-
-def execute (command: Protocol.Command): MainM Lean.Json := do
-  let run { α β: Type } [Lean.FromJson α] [Lean.ToJson β] (comm: α → MainM (CR β)): MainM Lean.Json :=
-    match Lean.fromJson? command.payload with
-    | .ok args => do
-      match (← comm args) with
-      | .ok result =>  return Lean.toJson result
-      | .error ierror => return Lean.toJson ierror
-    | .error error => return Lean.toJson $ errorCommand s!"Unable to parse json: {error}"
-  match command.cmd with
-  | "reset"         => run reset
-  | "stat"          => run stat
-  | "expr.echo"     => run expr_echo
-  | "env.catalog"   => run env_catalog
-  | "env.inspect"   => run env_inspect
-  | "env.add"       => run env_add
-  | "options.set"   => run options_set
-  | "options.print" => run options_print
-  | "goal.start"    => run goal_start
-  | "goal.tactic"   => run goal_tactic
-  | "goal.continue" => run goal_continue
-  | "goal.delete"   => run goal_delete
-  | "goal.print"    => run goal_print
-  | "frontend.process"  => run frontend_process
-  | cmd =>
-    let error: Protocol.InteractionError :=
-      errorCommand s!"Unknown command {cmd}"
-    return Lean.toJson error
-  where
-  errorCommand := errorI "command"
-  errorIndex := errorI "index"
-  newGoalState (goalState: GoalState) : MainM Nat := do
-    let state ← get
-    let stateId := state.nextId
-    set { state with
-      goalStates := state.goalStates.insert stateId goalState,
-      nextId := state.nextId + 1
-    }
-    return stateId
-  -- Command Functions
-  reset (_: Protocol.Reset): MainM (CR Protocol.StatResult) := do
-    let state ← get
-    let nGoals := state.goalStates.size
-    set { state with nextId := 0, goalStates := .empty }
-    return .ok { nGoals }
-  stat (_: Protocol.Stat): MainM (CR Protocol.StatResult) := do
-    let state ← get
-    let nGoals := state.goalStates.size
-    return .ok { nGoals }
-  env_catalog (args: Protocol.EnvCatalog): MainM (CR Protocol.EnvCatalogResult) := do
-    let result ← Environment.catalog args
-    return .ok result
-  env_inspect (args: Protocol.EnvInspect): MainM (CR Protocol.EnvInspectResult) := do
-    let state ← get
-    Environment.inspect args state.options
-  env_add (args: Protocol.EnvAdd): MainM (CR Protocol.EnvAddResult) := do
-    Environment.addDecl args
-  expr_echo (args: Protocol.ExprEcho): MainM (CR Protocol.ExprEchoResult) := do
-    let state ← get
-    exprEcho args.expr (expectedType? := args.type?) (levels := args.levels.getD #[]) (options := state.options)
-  options_set (args: Protocol.OptionsSet): MainM (CR Protocol.OptionsSetResult) := do
-    let state ← get
-    let options := state.options
-    set { state with
-      options := {
-        -- FIXME: This should be replaced with something more elegant
-        printJsonPretty := args.printJsonPretty?.getD options.printJsonPretty,
-        printExprPretty := args.printExprPretty?.getD options.printExprPretty,
-        printExprAST := args.printExprAST?.getD options.printExprAST,
-        printDependentMVars := args.printDependentMVars?.getD options.printDependentMVars,
-        noRepeat := args.noRepeat?.getD options.noRepeat,
-        printAuxDecls := args.printAuxDecls?.getD options.printAuxDecls,
-        printImplementationDetailHyps := args.printImplementationDetailHyps?.getD options.printImplementationDetailHyps
-        automaticMode := args.automaticMode?.getD options.automaticMode,
-      }
-    }
-    return .ok {  }
-  options_print (_: Protocol.OptionsPrint): MainM (CR Protocol.Options) := do
-    return .ok (← get).options
-  goal_start (args: Protocol.GoalStart): MainM (CR Protocol.GoalStartResult) := do
-    let env ← Lean.MonadEnv.getEnv
-    let expr?: Except _ GoalState ← runTermElabInMainM (match args.expr, args.copyFrom with
-      | .some expr, .none => goalStartExpr expr (args.levels.getD #[])
-      | .none, .some copyFrom =>
-        (match env.find? <| copyFrom.toName with
-        | .none => return .error <| errorIndex s!"Symbol not found: {copyFrom}"
-        | .some cInfo => return .ok (← GoalState.create cInfo.type))
-      | _, _ =>
-        return .error <| errorI "arguments" "Exactly one of {expr, copyFrom} must be supplied")
-    match expr? with
-    | .error error => return .error error
-    | .ok goalState =>
-      let stateId ← newGoalState goalState
-      return .ok { stateId, root := goalState.root.name.toString }
-  goal_tactic (args: Protocol.GoalTactic): MainM (CR Protocol.GoalTacticResult) := do
-    let state ← get
-    let .some goalState := state.goalStates[args.stateId]? |
-      return .error $ errorIndex s!"Invalid state index {args.stateId}"
-    let .some goal := goalState.goals.get? args.goalId |
-      return .error $ errorIndex s!"Invalid goal index {args.goalId}"
-    let nextGoalState?: Except _ TacticResult ← runTermElabInMainM do
-      match args.tactic?, args.expr?, args.have?, args.let?, args.calc?, args.conv?  with
-      | .some tactic, .none, .none, .none, .none, .none => do
-        pure <| Except.ok <| ← goalState.tryTactic goal tactic
-      | .none, .some expr, .none, .none, .none, .none => do
-        pure <| Except.ok <| ← goalState.tryAssign goal expr
-      | .none, .none, .some type, .none, .none, .none => do
-        let binderName := args.binderName?.getD ""
-        pure <| Except.ok <| ← goalState.tryHave goal binderName type
-      | .none, .none, .none, .some type, .none, .none => do
-        let binderName := args.binderName?.getD ""
-        pure <| Except.ok <| ← goalState.tryLet goal binderName type
-      | .none, .none, .none, .none, .some pred, .none => do
-        pure <| Except.ok <| ← goalState.tryCalc goal pred
-      | .none, .none, .none, .none, .none, .some true => do
-        pure <| Except.ok <| ← goalState.conv goal
-      | .none, .none, .none, .none, .none, .some false => do
-        pure <| Except.ok <| ← goalState.convExit
-      | _, _, _, _, _, _ =>
-        let error := errorI "arguments" "Exactly one of {tactic, expr, have, calc, conv} must be supplied"
-        pure $ Except.error $ error
-    match nextGoalState? with
-    | .error error => return .error error
-    | .ok (.success nextGoalState) => do
-      let nextGoalState ← match state.options.automaticMode, args.conv? with
-        | true, .none => do
-          let .ok result := nextGoalState.resume (nextGoalState.goals ++ goalState.goals) |
-            throwError "Resuming known goals"
-          pure result
-        | true, .some true => pure nextGoalState
-        | true, .some false => do
-          let .some (_, _, dormantGoals) := goalState.convMVar? |
-            throwError "If conv exit succeeded this should not fail"
-          let .ok result := nextGoalState.resume (nextGoalState.goals ++ dormantGoals) |
-            throwError "Resuming known goals"
-          pure result
-        | false, _ => pure nextGoalState
-      let nextStateId ← newGoalState nextGoalState
-      let goals ← nextGoalState.serializeGoals (parent := .some goalState) (options := state.options) |>.run'
-      return .ok {
-        nextStateId? := .some nextStateId,
-        goals? := .some goals,
-      }
-    | .ok (.parseError message) =>
-      return .ok { parseError? := .some message }
-    | .ok (.invalidAction message) =>
-      return .error $ errorI "invalid" message
-    | .ok (.failure messages) =>
-      return .ok { tacticErrors? := .some messages }
-  goal_continue (args: Protocol.GoalContinue): MainM (CR Protocol.GoalContinueResult) := do
-    let state ← get
-    let .some target := state.goalStates[args.target]? |
-      return .error $ errorIndex s!"Invalid state index {args.target}"
-    let nextState? ← match args.branch?, args.goals? with
-      | .some branchId, .none => do
-        match state.goalStates[branchId]? with
-        | .none => return .error $ errorIndex s!"Invalid state index {branchId}"
-        | .some branch => pure $ target.continue branch
-      | .none, .some goals =>
-        pure $ goalResume target goals
-      | _, _ => return .error <| errorI "arguments" "Exactly one of {branch, goals} must be supplied"
-    match nextState? with
-    | .error error => return .error <| errorI "structure" error
-    | .ok nextGoalState =>
-      let nextStateId := state.nextId
-      set { state with
-        goalStates := state.goalStates.insert nextStateId nextGoalState,
-        nextId := state.nextId + 1
-      }
-      let goals ← goalSerialize nextGoalState (options := state.options)
-      return .ok {
-        nextStateId,
-        goals,
-      }
-  goal_delete (args: Protocol.GoalDelete): MainM (CR Protocol.GoalDeleteResult) := do
-    let state ← get
-    let goalStates := args.stateIds.foldl (λ map id => map.erase id) state.goalStates
-    set { state with goalStates }
-    return .ok {}
-  goal_print (args: Protocol.GoalPrint): MainM (CR Protocol.GoalPrintResult) := do
-    let state ← get
-    let .some goalState := state.goalStates[args.stateId]? |
-      return .error $ errorIndex s!"Invalid state index {args.stateId}"
-    let result ← runMetaInMainM <| goalPrint goalState state.options
-    return .ok result
-  frontend_process (args: Protocol.FrontendProcess): MainM (CR Protocol.FrontendProcessResult) := do
-    let options := (← get).options
-    try
-      let (fileName, file) ← match args.fileName?, args.file? with
-        | .some fileName, .none => do
-          let file ← IO.FS.readFile fileName
-          pure (fileName, file)
-        | .none, .some file =>
-          pure ("<anonymous>", file)
-        | _, _ => return .error <| errorI "arguments" "Exactly one of {fileName, file} must be supplied"
-      let env?: Option Lean.Environment ← if args.fileName?.isSome then
-          pure .none
-        else do
-          let env ← Lean.MonadEnv.getEnv
-          pure <| .some env
-      let (context, state) ← do Frontend.createContextStateFromFile file fileName env? {}
-      let frontendM := Frontend.mapCompilationSteps λ step => do
-        let boundary := (step.src.startPos.byteIdx, step.src.stopPos.byteIdx)
-        let invocations?: Option (List Protocol.InvokedTactic) ← if args.invocations then
-            let invocations ← Frontend.collectTacticsFromCompilationStep step
-            pure $ .some invocations
-          else
-            pure .none
-        let sorrys := if args.sorrys then
-            Frontend.collectSorrys step
-          else
-            []
-        let messages ← step.messageStrings
-        return (step.before, boundary, invocations?, sorrys, messages)
-      let li ← frontendM.run context |>.run' state
-      let units ← li.mapM λ (env, boundary, invocations?, sorrys, messages) => Lean.withEnv env do
-        let (goalStateId?, goals) ← if sorrys.isEmpty then do
-            pure (.none, #[])
-          else do
-            let goalState ← runMetaInMainM $ Frontend.sorrysToGoalState sorrys
-            let stateId ← newGoalState goalState
-            let goals ← goalSerialize goalState options
-            pure (.some stateId, goals)
-        return {
-          boundary,
-          invocations?,
-          goalStateId?,
-          goals,
-          messages,
-        }
-      return .ok { units }
-    catch e =>
-      return .error $ errorI "frontend" (← e.toMessageData.toString)
-
-end Pantograph.Repl

Test/Common.lean

@@ -1,155 +0,0 @@
-import Pantograph.Goal
-import Pantograph.Library
-import Pantograph.Protocol
-import Pantograph.Condensed
-import Lean
-import LSpec
-
-open Lean
-
-namespace Pantograph
-
-deriving instance Repr for Expr
--- Use strict equality check for expressions
-instance : BEq Expr := ⟨Expr.equal⟩
-
-def uniq (n: Nat): Name := .num (.str .anonymous "_uniq") n
-
--- Auxiliary functions
-namespace Protocol
-def Goal.devolatilizeVars (goal: Goal): Goal :=
-  {
-    goal with
-    vars := goal.vars.map removeInternalAux,
-
-  }
-  where removeInternalAux (v: Variable): Variable :=
-    {
-      v with
-      name := ""
-    }
-/-- Set internal names to "" -/
-def Goal.devolatilize (goal: Goal): Goal :=
-  {
-    goal.devolatilizeVars with
-    name := "",
-  }
-
-deriving instance DecidableEq, Repr for Name
-deriving instance DecidableEq, Repr for Expression
-deriving instance DecidableEq, Repr for Variable
-deriving instance DecidableEq, Repr for Goal
-deriving instance DecidableEq, Repr for ExprEchoResult
-deriving instance DecidableEq, Repr for InteractionError
-deriving instance DecidableEq, Repr for Option
-end Protocol
-
-namespace Condensed
-
-deriving instance BEq, Repr for LocalDecl
-deriving instance BEq, Repr for Goal
-
-protected def LocalDecl.devolatilize (decl: LocalDecl): LocalDecl :=
-  {
-    decl with fvarId := { name := .anonymous }
-  }
-protected def Goal.devolatilize (goal: Goal): Goal :=
-  {
-    goal with
-    mvarId := { name := .anonymous },
-    context := goal.context.map LocalDecl.devolatilize
-  }
-
-end Condensed
-
-def GoalState.get! (state: GoalState) (i: Nat): MVarId := state.goals.get! i
-def GoalState.tacticOn (state: GoalState) (goalId: Nat) (tactic: String) := state.tryTactic (state.goals.get! goalId) tactic
-
-def TacticResult.toString : TacticResult → String
-  | .success state => s!".success ({state.goals.length} goals)"
-  | .failure messages =>
-    let messages := "\n".intercalate messages.toList
-    s!".failure {messages}"
-  | .parseError error => s!".parseError {error}"
-  | .invalidAction error => s!".invalidAction {error}"
-
-namespace Test
-
-def expectationFailure (desc: String) (error: String): LSpec.TestSeq := LSpec.test desc (LSpec.ExpectationFailure "ok _" error)
-def assertUnreachable (message: String): LSpec.TestSeq := LSpec.check message false
-
-def parseFailure (error: String) := expectationFailure "parse" error
-def elabFailure (error: String) := expectationFailure "elab" error
-
-def runCoreMSeq (env: Environment) (coreM: CoreM LSpec.TestSeq) (options: Array String := #[]): IO LSpec.TestSeq := do
-  let coreContext: Core.Context ← createCoreContext options
-  match ← (coreM.run' coreContext { env := env }).toBaseIO with
-  | .error exception =>
-    return LSpec.test "Exception" (s!"internal exception #{← exception.toMessageData.toString}" = "")
-  | .ok a            => return a
-def runMetaMSeq (env: Environment) (metaM: MetaM LSpec.TestSeq): IO LSpec.TestSeq :=
-  runCoreMSeq env metaM.run'
-def runTermElabMInMeta { α } (termElabM: Lean.Elab.TermElabM α): Lean.MetaM α :=
-  termElabM.run' (ctx := Condensed.elabContext)
-def runTermElabMSeq (env: Environment) (termElabM: Elab.TermElabM LSpec.TestSeq): IO LSpec.TestSeq :=
-  runMetaMSeq env $ termElabM.run' (ctx := Condensed.elabContext)
-
-def exprToStr (e: Expr): Lean.MetaM String := toString <$> Meta.ppExpr e
-
-def strToTermSyntax [Monad m] [MonadEnv m] (s: String): m Syntax := do
-  let .ok stx := Parser.runParserCategory
-    (env := ← MonadEnv.getEnv)
-    (catName := `term)
-    (input := s)
-    (fileName := filename) | panic! s!"Failed to parse {s}"
-  return stx
-def parseSentence (s: String): Elab.TermElabM Expr := do
-  let stx ← match Parser.runParserCategory
-    (env := ← MonadEnv.getEnv)
-    (catName := `term)
-    (input := s)
-    (fileName := filename) with
-    | .ok syn => pure syn
-    | .error error => throwError "Failed to parse: {error}"
-  Elab.Term.elabTerm (stx := stx) .none
-
-def runTacticOnMVar (tacticM: Elab.Tactic.TacticM Unit) (goal: MVarId): Elab.TermElabM (List MVarId) := do
-    let (_, newGoals) ← tacticM { elaborator := .anonymous } |>.run { goals := [goal] }
-    return newGoals.goals
-def mvarUserNameAndType (mvarId: MVarId): MetaM (Name × String) := do
-  let name := (← mvarId.getDecl).userName
-  let t ← exprToStr (← mvarId.getType)
-  return (name, t)
-
-
--- Monadic testing
-
-abbrev TestT := StateT LSpec.TestSeq
-
-def addTest [Monad m] (test: LSpec.TestSeq): TestT m Unit := do
-  set $ (← get) ++ test
-
-def runTest [Monad m] (t: TestT m Unit): m LSpec.TestSeq :=
-  Prod.snd <$> t.run LSpec.TestSeq.done
-
-def runTestTermElabM (env: Environment) (t: TestT Elab.TermElabM Unit):
-  IO LSpec.TestSeq :=
-  runTermElabMSeq env $ runTest t
-
-def cdeclOf (userName: Name) (type: Expr): Condensed.LocalDecl :=
-  { userName, type }
-
-def buildGoal (nameType: List (String × String)) (target: String) (userName?: Option String := .none):
-    Protocol.Goal :=
-  {
-    userName?,
-    target := { pp? := .some target},
-    vars := (nameType.map fun x => ({
-      userName := x.fst,
-      type? := .some { pp? := .some x.snd },
-    })).toArray
-  }
-
-end Test
-
-end Pantograph

Test/Environment.lean

@@ -1,107 +0,0 @@
-import LSpec
-import Pantograph.Serial
-import Pantograph.Environment
-import Test.Common
-import Lean
-
-open Lean
-namespace Pantograph.Test.Environment
-
-open Pantograph
-
-deriving instance DecidableEq, Repr for Protocol.InductInfo
-deriving instance DecidableEq, Repr for Protocol.ConstructorInfo
-deriving instance DecidableEq, Repr for Protocol.RecursorRule
-deriving instance DecidableEq, Repr for Protocol.RecursorInfo
-deriving instance DecidableEq, Repr for Protocol.EnvInspectResult
-
-def test_catalog: IO LSpec.TestSeq := do
-  let env: Environment ← importModules
-    (imports := #[`Init])
-    (opts := {})
-    (trustLevel := 1)
-  let inner: CoreM LSpec.TestSeq := do
-    let catalogResult ← Environment.catalog {}
-    let symbolsWithNum := env.constants.fold (init := #[]) (λ acc name info =>
-      match (Environment.toFilteredSymbol name info).isSome && (name matches .num _ _) with
-      | false => acc
-      | true => acc.push name
-      )
-    return LSpec.check "No num symbols" (symbolsWithNum.size == 0)
-  runCoreMSeq env inner
-
-def test_symbol_visibility: IO LSpec.TestSeq := do
-  let entries: List (Name × Bool) := [
-    ("Nat.add_comm".toName, false),
-    ("foo.bla.Init.Data.List.Basic.2.1.Init.Lean.Expr._hyg.4".toName, true),
-    ("Init.Data.Nat.Basic._auxLemma.4".toName, true),
-  ]
-  let suite := entries.foldl (λ suites (symbol, target) =>
-    let test := LSpec.check symbol.toString ((Environment.isNameInternal symbol) == target)
-    LSpec.TestSeq.append suites test) LSpec.TestSeq.done
-  return suite
-
-inductive ConstantCat where
-  | induct (info: Protocol.InductInfo)
-  | ctor (info: Protocol.ConstructorInfo)
-  | recursor (info: Protocol.RecursorInfo)
-
-def test_inspect: IO LSpec.TestSeq := do
-  let env: Environment ← importModules
-    (imports := #[`Init])
-    (opts := {})
-    (trustLevel := 1)
-  let testCases: List (String × ConstantCat) := [
-    ("Or", ConstantCat.induct {
-      numParams := 2,
-      numIndices := 0,
-      all := #["Or"],
-      ctors := #["Or.inl", "Or.inr"],
-    }),
-    ("Except.ok", ConstantCat.ctor {
-      induct := "Except",
-      cidx := 1,
-      numParams := 2,
-      numFields := 1,
-    }),
-    ("Eq.rec", ConstantCat.recursor {
-      all := #["Eq"],
-      numParams := 2,
-      numIndices := 1,
-      numMotives := 1,
-      numMinors := 1,
-      rules := #[{ ctor := "Eq.refl", nFields := 0, rhs := { pp? := .some "fun {α} a motive refl => refl" } }]
-      k := true,
-    }),
-    ("ForM.rec", ConstantCat.recursor {
-      all := #["ForM"],
-      numParams := 3,
-      numIndices := 0,
-      numMotives := 1,
-      numMinors := 1,
-      rules := #[{ ctor := "ForM.mk", nFields := 1, rhs := { pp? := .some "fun m γ α motive mk forM => mk forM" } }]
-      k := false,
-    })
-  ]
-  let inner: CoreM LSpec.TestSeq := do
-    testCases.foldlM (λ acc (name, cat) => do
-      let args: Protocol.EnvInspect := { name := name }
-      let result ← match ← Environment.inspect args (options := {}) with
-        | .ok result => pure $ result
-        | .error e => panic! s!"Error: {e.desc}"
-      let p := match cat with
-        | .induct info => LSpec.test name (result.inductInfo? == .some info)
-        | .ctor info => LSpec.test name (result.constructorInfo? == .some info)
-        | .recursor info => LSpec.test name (result.recursorInfo? == .some info)
-      return LSpec.TestSeq.append acc p
-    ) LSpec.TestSeq.done
-  runCoreMSeq env inner
-
-def suite: List (String × IO LSpec.TestSeq) :=
-  [
-    ("Catalog", test_catalog),
-    ("Symbol Visibility", test_symbol_visibility),
-    ("Inspect", test_inspect),
-  ]
-
-end Pantograph.Test.Environment

Test/Frontend.lean

@@ -1,191 +0,0 @@
-import LSpec
-import Pantograph
-import Repl
-import Test.Common
-
-open Lean Pantograph
-namespace Pantograph.Test.Frontend
-
-def collectSorrysFromSource (source: String) : MetaM (List GoalState) := do
-  let filename := "<anonymous>"
-  let (context, state) ← do Frontend.createContextStateFromFile source filename (← getEnv) {}
-  let m := Frontend.mapCompilationSteps λ step => do
-    return (step.before, Frontend.collectSorrys step)
-  let li ← m.run context |>.run' state
-  let goalStates ← li.filterMapM λ (env, sorrys) => withEnv env do
-    if sorrys.isEmpty then
-      return .none
-    let goalState ← Frontend.sorrysToGoalState sorrys
-    return .some goalState
-  return goalStates
-
-def test_multiple_sorrys_in_proof : TestT MetaM Unit := do
-  let sketch := "
-theorem plus_n_Sm_proved_formal_sketch : ∀ n m : Nat, n + (m + 1) = (n + m) + 1 := by
-   have h_nat_add_succ: ∀ n m : Nat, n = m := sorry
-   sorry
-  "
-  let goalStates ← (collectSorrysFromSource sketch).run' {}
-  let [goalState] := goalStates | panic! "Incorrect number of states"
-  addTest $ LSpec.check "goals" ((← goalState.serializeGoals (options := {})).map (·.devolatilize) = #[
-    {
-      target := { pp? := "∀ (n m : Nat), n = m" },
-      vars := #[
-      ]
-    },
-    {
-      target := { pp? := "∀ (n m : Nat), n + (m + 1) = n + m + 1" },
-      vars := #[{
-        userName := "h_nat_add_succ",
-        type? := .some { pp? := "∀ (n m : Nat), n = m" },
-      }],
-    }
-  ])
-
-def test_sorry_in_middle: TestT MetaM Unit := do
-  let sketch := "
-example : ∀ (n m: Nat), n + m = m + n := by
-  intros n m
-  sorry
-  "
-  let goalStates ← (collectSorrysFromSource sketch).run' {}
-  let [goalState] := goalStates | panic! s!"Incorrect number of states: {goalStates.length}"
-  addTest $ LSpec.check "goals" ((← goalState.serializeGoals (options := {})).map (·.devolatilize) = #[
-    {
-      target := { pp? := "n + m = m + n" },
-      vars := #[{
-           userName := "n",
-           type? := .some { pp? := "Nat" },
-        }, {
-           userName := "m",
-           type? := .some { pp? := "Nat" },
-        }
-      ],
-    }
-  ])
-
-def test_sorry_in_induction : TestT MetaM Unit := do
-  let sketch := "
-example : ∀ (n m: Nat), n + m = m + n := by
-  intros n m
-  induction n with
-  | zero =>
-    have h1 : 0 + m = m := sorry
-    sorry
-  | succ n ih =>
-    have h2 : n + m = m := sorry
-    sorry
-  "
-  let goalStates ← (collectSorrysFromSource sketch).run' {}
-  let [goalState] := goalStates | panic! s!"Incorrect number of states: {goalStates.length}"
-  addTest $ LSpec.check "goals" ((← goalState.serializeGoals (options := {})).map (·.devolatilize) = #[
-    {
-      target := { pp? := "0 + m = m" },
-      vars := #[{
-        userName := "m",
-        type? := .some { pp? := "Nat" },
-      }]
-    },
-    {
-      userName? := .some "zero",
-      target := { pp? := "0 + m = m + 0" },
-      vars := #[{
-        userName := "m",
-        type? := .some { pp? := "Nat" },
-      }, {
-        userName := "h1",
-        type? := .some { pp? := "0 + m = m" },
-      }]
-    },
-    {
-      target := { pp? := "n + m = m" },
-      vars := #[{
-        userName := "m",
-        type? := .some { pp? := "Nat" },
-      }, {
-        userName := "n",
-        type? := .some { pp? := "Nat" },
-      }, {
-        userName := "ih",
-        type? := .some { pp? := "n + m = m + n" },
-      }]
-    },
-    {
-      userName? := .some "succ",
-      target := { pp? := "n + 1 + m = m + (n + 1)" },
-      vars := #[{
-        userName := "m",
-        type? := .some { pp? := "Nat" },
-      }, {
-        userName := "n",
-        type? := .some { pp? := "Nat" },
-      }, {
-        userName := "ih",
-        type? := .some { pp? := "n + m = m + n" },
-      },  {
-        userName := "h2",
-        type? := .some { pp? := "n + m = m" },
-      }]
-    }
-  ])
-
-def test_sorry_in_coupled: TestT MetaM Unit := do
-  let sketch := "
-example : ∀ (y: Nat), ∃ (x: Nat), y + 1 = x := by
-  intro y
-  apply Exists.intro
-  case h => sorry
-  case w => sorry
-  "
-  let goalStates ← (collectSorrysFromSource sketch).run' {}
-  let [goalState] := goalStates | panic! s!"Incorrect number of states: {goalStates.length}"
-  addTest $ LSpec.check "goals" ((← goalState.serializeGoals (options := {})).map (·.devolatilize) = #[
-    {
-      target := { pp? := "y + 1 = ?w" },
-      vars := #[{
-           userName := "y",
-           type? := .some { pp? := "Nat" },
-        }
-      ],
-    },
-    {
-      userName? := .some "w",
-      target := { pp? := "Nat" },
-      vars := #[{
-           userName := "y",
-           type? := .some { pp? := "Nat" },
-        }
-      ],
-    }
-  ])
-
-def test_environment_capture: TestT MetaM Unit := do
-  let sketch := "
-def mystery (n: Nat) := n + 1
-
-example (n: Nat) : mystery n + 1 = n + 2 := sorry
-  "
-  let goalStates ← (collectSorrysFromSource sketch).run' {}
-  let [goalState] := goalStates | panic! s!"Incorrect number of states: {goalStates.length}"
-  addTest $ LSpec.check "goals" ((← goalState.serializeGoals (options := {})).map (·.devolatilize) = #[
-    {
-      target := { pp? := "mystery n + 1 = n + 2" },
-      vars := #[{
-         userName := "n",
-         type? := .some { pp? := "Nat" },
-      }],
-    }
-  ])
-
-
-def suite (env : Environment): List (String × IO LSpec.TestSeq) :=
-  let tests := [
-    ("multiple_sorrys_in_proof", test_multiple_sorrys_in_proof),
-    ("sorry_in_middle", test_sorry_in_middle),
-    ("sorry_in_induction", test_sorry_in_induction),
-    ("sorry_in_coupled", test_sorry_in_coupled),
-    ("environment_capture", test_environment_capture),
-  ]
-  tests.map (fun (name, test) => (name, runMetaMSeq env $ runTest test))
-
-end Pantograph.Test.Frontend

Test/Integration.lean

@@ -2,257 +2,92 @@
  -/
 import LSpec
 import Pantograph
-import Repl
-import Test.Common
+namespace Pantograph.Test
+open Pantograph
 
-namespace Pantograph.Test.Integration
-open Pantograph.Repl
+def subroutine_named_step (name cmd: String) (payload: List (String × Lean.Json))
+    (expected: Lean.Json): MainM LSpec.TestSeq := do
+  let result ← execute { cmd := cmd, payload := Lean.Json.mkObj payload }
+  return LSpec.test name (toString result = toString expected)
+def subroutine_step (cmd: String) (payload: List (String × Lean.Json))
+    (expected: Lean.Json): MainM LSpec.TestSeq := subroutine_named_step cmd cmd payload expected
 
-def step { α } [Lean.ToJson α] (cmd: String) (payload: List (String × Lean.Json))
-    (expected: α) (name? : Option String := .none): MainM LSpec.TestSeq := do
-  let payload := Lean.Json.mkObj payload
-  let name := name?.getD s!"{cmd} {payload.compress}"
-  let result ← Repl.execute { cmd, payload }
-  return LSpec.test name (toString result = toString (Lean.toJson expected))
-
-abbrev Test := List (MainM LSpec.TestSeq)
-
-def test_elab : Test :=
-  [
-    step "expr.echo"
-      [("expr", .str "λ {α : Sort (u + 1)} => List α"), ("levels", .arr #["u"])]
-     (Lean.toJson ({
-       type := { pp? := .some "{α : Type u} → Type u" },
-       expr := { pp? := .some "fun {α} => List α" }
-     }: Protocol.ExprEchoResult)),
-  ]
-
-def test_option_modify : Test :=
-  let pp? := Option.some "∀ (n : Nat), n + 1 = n.succ"
-  let sexp? := Option.some "(:forall n (:c Nat) ((:c Eq) (:c Nat) ((:c HAdd.hAdd) (:c Nat) (:c Nat) (:c Nat) ((:c instHAdd) (:c Nat) (:c instAddNat)) 0 ((:c OfNat.ofNat) (:c Nat) (:lit 1) ((:c instOfNatNat) (:lit 1)))) ((:c Nat.succ) 0)))"
-  let module? := Option.some "Init.Data.Nat.Basic"
-  let options: Protocol.Options := {}
-  [
-    step "env.inspect" [("name", .str "Nat.add_one")]
-     ({ type := { pp? }, module? }: Protocol.EnvInspectResult),
-    step "options.set" [("printExprAST", .bool true)]
-     ({ }: Protocol.OptionsSetResult),
-    step "env.inspect" [("name", .str "Nat.add_one")]
-     ({ type := { pp?, sexp? }, module? }: Protocol.EnvInspectResult),
-    step "options.print" []
-     ({ options with printExprAST := true }: Protocol.Options),
-  ]
-def test_malformed_command : Test :=
-  let invalid := "invalid"
-  [
-    step invalid [("name", .str "Nat.add_one")]
-     ({ error := "command", desc := s!"Unknown command {invalid}" }: Protocol.InteractionError)
-     (name? := .some "Invalid Command"),
-    step "expr.echo" [(invalid, .str "Random garbage data")]
-     ({ error := "command", desc := s!"Unable to parse json: Pantograph.Protocol.ExprEcho.expr: String expected" }:
-      Protocol.InteractionError)
-    (name? := .some "JSON Deserialization")
-  ]
-def test_tactic : Test :=
-  let goal1: Protocol.Goal := {
-    name := "_uniq.11",
-    target := { pp? := .some "∀ (q : Prop), x ∨ q → q ∨ x" },
-    vars := #[{ name := "_uniq.10", userName := "x", type? := .some { pp? := .some "Prop" }}],
-  }
-  let goal2: Protocol.Goal := {
-    name := "_uniq.17",
-    target := { pp? := .some "x ∨ y → y ∨ x" },
-    vars := #[
-      { name := "_uniq.10", userName := "x", type? := .some { pp? := .some "Prop" }},
-      { name := "_uniq.16", userName := "y", type? := .some { pp? := .some "Prop" }}
-    ],
-  }
-  [
-    step "goal.start" [("expr", .str "∀ (p q: Prop), p ∨ q → q ∨ p")]
-     ({ stateId := 0, root := "_uniq.9" }: Protocol.GoalStartResult),
-    step "goal.tactic" [("stateId", .num 0), ("goalId", .num 0), ("tactic", .str "intro x")]
-     ({ nextStateId? := .some 1, goals? := #[goal1], }: Protocol.GoalTacticResult),
-    step "goal.print" [("stateId", .num 1)]
-     ({ parent? := .some { pp? := .some "fun x => ?m.12 x" }, }: Protocol.GoalPrintResult),
-    step "goal.tactic" [("stateId", .num 1), ("goalId", .num 0), ("tactic", .str "intro y")]
-     ({ nextStateId? := .some 2, goals? := #[goal2], }: Protocol.GoalTacticResult),
-  ]
-def test_automatic_mode (automatic: Bool): Test :=
-  let varsPQ := #[
-    { name := "_uniq.10", userName := "p", type? := .some { pp? := .some "Prop" }},
-    { name := "_uniq.13", userName := "q", type? := .some { pp? := .some "Prop" }}
-  ]
-  let goal1: Protocol.Goal := {
-    name := "_uniq.17",
-    target := { pp? := .some "q ∨ p" },
-    vars := varsPQ ++ #[
-      { name := "_uniq.16", userName := "h", type? := .some { pp? := .some "p ∨ q" }}
-    ],
-  }
-  let goal2l: Protocol.Goal := {
-    name := "_uniq.59",
-    userName? := .some "inl",
-    target := { pp? := .some "q ∨ p" },
-    vars := varsPQ ++ #[
-      { name := "_uniq.47", userName := "h✝", type? := .some { pp? := .some "p" }, isInaccessible := true}
-    ],
-  }
-  let goal2r: Protocol.Goal := {
-    name := "_uniq.72",
-    userName? := .some "inr",
-    target := { pp? := .some "q ∨ p" },
-    vars := varsPQ ++ #[
-      { name := "_uniq.60", userName := "h✝", type? := .some { pp? := .some "q" }, isInaccessible := true}
-    ],
-  }
-  let goal3l: Protocol.Goal := {
-    name := "_uniq.78",
-    userName? := .some "inl.h",
-    target := { pp? := .some "p" },
-    vars := varsPQ ++ #[
-      { name := "_uniq.47", userName := "h✝", type? := .some { pp? := .some "p" }, isInaccessible := true}
-    ],
-  }
-  [
-    step "options.set" [("automaticMode", .bool automatic)]
-     ({}: Protocol.OptionsSetResult),
-    step "goal.start" [("expr", .str "∀ (p q: Prop), p ∨ q → q ∨ p")]
-     ({ stateId := 0, root := "_uniq.9" }: Protocol.GoalStartResult),
-    step "goal.tactic" [("stateId", .num 0), ("goalId", .num 0), ("tactic", .str "intro p q h")]
-     ({ nextStateId? := .some 1, goals? := #[goal1], }: Protocol.GoalTacticResult),
-    step "goal.tactic" [("stateId", .num 1), ("goalId", .num 0), ("tactic", .str "cases h")]
-     ({ nextStateId? := .some 2, goals? := #[goal2l, goal2r], }: Protocol.GoalTacticResult),
-    let goals? := if automatic then #[goal3l, goal2r] else #[goal3l]
-    step "goal.tactic" [("stateId", .num 2), ("goalId", .num 0), ("tactic", .str "apply Or.inr")]
-     ({ nextStateId? := .some 3, goals?, }: Protocol.GoalTacticResult),
-  ]
-
-def test_env_add_inspect : Test :=
-  let name1 := "Pantograph.mystery"
-  let name2 := "Pantograph.mystery2"
-  [
-    step "env.add"
-      [
-        ("name", .str name1),
-        ("type", .str "Prop → Prop → Prop"),
-        ("value", .str "λ (a b: Prop) => Or a b"),
-        ("isTheorem", .bool false)
-      ]
-     ({}: Protocol.EnvAddResult),
-    step "env.inspect" [("name", .str name1)]
-     ({
-       value? := .some { pp? := .some "fun a b => a ∨ b" },
-       type := { pp? := .some "Prop → Prop → Prop" },
-     }:
-      Protocol.EnvInspectResult),
-    step "env.add"
-      [
-        ("name", .str name2),
-        ("type", .str "Nat → Int"),
-        ("value", .str "λ (a: Nat) => a + 1"),
-        ("isTheorem", .bool false)
-      ]
-     ({}: Protocol.EnvAddResult),
-    step "env.inspect" [("name", .str name2)]
-     ({
-       value? := .some { pp? := .some "fun a => ↑a + 1" },
-       type := { pp? := .some "Nat → Int" },
-     }:
-      Protocol.EnvInspectResult)
-  ]
-
-example : ∀ (p: Prop), p → p := by
-  intro p h
-  exact h
-
-def test_frontend_process : Test :=
-  [
-    let file := "example : ∀ (p q: Prop), p → p ∨ q := by\n  intro p q h\n  exact Or.inl h"
-    let goal1 := "p q : Prop\nh : p\n⊢ p ∨ q"
-    step "frontend.process"
-      [
-        ("file", .str file),
-        ("invocations", .bool true),
-        ("sorrys", .bool false),
-      ]
-     ({
-       units := [{
-         boundary := (0, file.utf8ByteSize),
-         invocations? := .some [
-           {
-             goalBefore := "⊢ ∀ (p q : Prop), p → p ∨ q",
-             goalAfter := goal1,
-             tactic := "intro p q h",
-             usedConstants := #[],
-           },
-           {
-             goalBefore := goal1 ,
-             goalAfter := "",
-             tactic := "exact Or.inl h",
-             usedConstants := #["Or.inl"],
-           },
-         ]
-       }],
-    }: Protocol.FrontendProcessResult),
-  ]
-
-example : 1 + 2 = 3 := rfl
-example (p: Prop): p → p := by simp
-
-def test_frontend_process_sorry : Test :=
-  let solved := "example : 1 + 2 = 3 := rfl\n"
-  let withSorry := "example (p: Prop): p → p := sorry"
-  [
-    let file := s!"{solved}{withSorry}"
-    let goal1: Protocol.Goal := {
-      name := "_uniq.6",
-      target := { pp? := .some "p → p" },
-      vars := #[{ name := "_uniq.4", userName := "p", type? := .some { pp? := .some "Prop" }}],
-    }
-    step "frontend.process"
-      [
-        ("file", .str file),
-        ("invocations", .bool false),
-        ("sorrys", .bool true),
-      ]
-     ({
-       units := [{
-         boundary := (0, solved.utf8ByteSize),
-       }, {
-         boundary := (solved.utf8ByteSize, solved.utf8ByteSize + withSorry.utf8ByteSize),
-         goalStateId? := .some 0,
-         goals := #[goal1],
-         messages := #["<anonymous>:2:0: warning: declaration uses 'sorry'\n"],
-       }],
-    }: Protocol.FrontendProcessResult),
-  ]
-
-
-def runTest (env: Lean.Environment) (steps: Test): IO LSpec.TestSeq := do
+def subroutine_runner (steps: List (MainM LSpec.TestSeq)): IO LSpec.TestSeq := do
   -- Setup the environment for execution
+  let env ← Lean.importModules
+    (imports := [{module := Lean.Name.str .anonymous "Init", runtimeOnly := false }])
+    (opts := {})
+    (trustLevel := 1)
   let context: Context := {
     imports := ["Init"]
   }
+  let coreContext: Lean.Core.Context := {
+    currNamespace := Lean.Name.str .anonymous "Aniva"
+    openDecls := [],
+    fileName := "<Test>",
+    fileMap := { source := "", positions := #[0], lines := #[1] },
+    options := Lean.Options.empty
+  }
   let commands: MainM LSpec.TestSeq :=
     steps.foldlM (λ suite step => do
       let result ← step
       return suite ++ result) LSpec.TestSeq.done
-  runCoreMSeq env <| commands.run context |>.run' {}
+  try
+    let termElabM := commands.run context |>.run' {}
+    let metaM := termElabM.run' (ctx := {
+      declName? := some "_pantograph",
+      errToSorry := false
+    })
+    let coreM := metaM.run'
+    return Prod.fst $ (← coreM.toIO coreContext { env := env })
+  catch ex =>
+    return LSpec.check s!"Uncaught IO exception: {ex.toString}" false
 
-
-def suite (env : Lean.Environment): List (String × IO LSpec.TestSeq) :=
-  let tests := [
-    ("expr.echo", test_elab),
-    ("options.set options.print", test_option_modify),
-    ("Malformed command", test_malformed_command),
-    ("Tactic", test_tactic),
-    ("Manual Mode", test_automatic_mode false),
-    ("Automatic Mode", test_automatic_mode true),
-    ("env.add env.inspect", test_env_add_inspect),
-    ("frontend.process invocation", test_frontend_process),
-    ("frontend.process sorry", test_frontend_process_sorry),
+def test_option_modify : IO LSpec.TestSeq :=
+  let pp? := Option.some "∀ (n : Nat), n + 1 = Nat.succ n"
+  let sexp? := Option.some "(:forall n (:c Nat) ((((:c Eq) (:c Nat)) (((((((:c HAdd.hAdd) (:c Nat)) (:c Nat)) (:c Nat)) (((:c instHAdd) (:c Nat)) (:c instAddNat))) 0) ((((:c OfNat.ofNat) (:c Nat)) (:lit 1)) ((:c instOfNatNat) (:lit 1))))) ((:c Nat.succ) 0)))"
+  let module? := Option.some "Init.Data.Nat.Basic"
+  let options: Commands.Options := {}
+  subroutine_runner [
+    subroutine_step "lib.inspect"
+      [("name", .str "Nat.add_one")]
+     (Lean.toJson ({
+       type := { pp? }, module? }:
+      Commands.LibInspectResult)),
+    subroutine_step "options.set"
+      [("printExprAST", .bool true)]
+     (Lean.toJson ({ }:
+      Commands.OptionsSetResult)),
+    subroutine_step "lib.inspect"
+      [("name", .str "Nat.add_one")]
+     (Lean.toJson ({
+       type := { pp?, sexp? }, module? }:
+      Commands.LibInspectResult)),
+    subroutine_step "options.print"
+      []
+     (Lean.toJson ({ options with printExprAST := true }:
+      Commands.OptionsPrintResult))
   ]
-  tests.map (fun (name, test) => (name, runTest env test))
+def test_malformed_command : IO LSpec.TestSeq :=
+  let invalid := "invalid"
+  subroutine_runner [
+    subroutine_named_step "Invalid command" invalid
+      [("name", .str "Nat.add_one")]
+     (Lean.toJson ({
+       error := "command", desc := s!"Unknown command {invalid}"}:
+      Commands.InteractionError)),
+    subroutine_named_step "JSON Deserialization" "expr.echo"
+      [(invalid, .str "Random garbage data")]
+     (Lean.toJson ({
+       error := "command", desc := s!"Unable to parse json: Pantograph.Commands.ExprEcho.expr: String expected"}:
+      Commands.InteractionError))
+  ]
+
+def test_integration: IO LSpec.TestSeq := do
+
+  return LSpec.group "Integration" $
+    (LSpec.group "Option modify" (← test_option_modify)) ++
+    (LSpec.group "Malformed command" (← test_malformed_command))
 
 
-end Pantograph.Test.Integration
+end Pantograph.Test

Test/Library.lean

@@ -1,38 +0,0 @@
-import LSpec
-import Lean
-import Pantograph.Library
-import Test.Common
-
-open Lean
-open Pantograph
-
-namespace Pantograph.Test.Library
-
-def test_expr_echo (env: Environment): IO LSpec.TestSeq := do
-  let inner: CoreM LSpec.TestSeq := do
-    let prop_and_proof := "⟨∀ (x: Prop), x → x, λ (x: Prop) (h: x) => h⟩"
-    let tests := LSpec.TestSeq.done
-    let echoResult ← exprEcho prop_and_proof (options := {})
-    let tests := tests.append (LSpec.test "fail" (echoResult.toOption == .some {
-      type := { pp? := "?m.2" }, expr := { pp? := "?m.3" }
-    }))
-    let echoResult ← exprEcho prop_and_proof (expectedType? := .some "Σ' p:Prop, p") (options := { printExprAST := true })
-    let tests := tests.append (LSpec.test "fail" (echoResult.toOption == .some {
-      type := {
-        pp? := "(p : Prop) ×' p",
-        sexp? := "((:c PSigma) (:sort 0) (:lambda p (:sort 0) 0))",
-      },
-      expr := {
-        pp? := "⟨∀ (x : Prop), x → x, fun x h => h⟩",
-        sexp? := "((:c PSigma.mk) (:sort 0) (:lambda p (:sort 0) 0) (:forall x (:sort 0) (:forall _ 0 1)) (:lambda x (:sort 0) (:lambda h 0 0)))",
-      }
-    }))
-    return tests
-  runCoreMSeq env (options := #["pp.proofs.threshold=100"]) inner
-
-def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
-  [
-    ("expr_echo", test_expr_echo env),
-  ]
-
-end Pantograph.Test.Library

Test/Main.lean

@@ -1,60 +1,18 @@
 import LSpec
-import Test.Environment
-import Test.Frontend
 import Test.Integration
-import Test.Library
-import Test.Metavar
 import Test.Proofs
 import Test.Serial
-import Test.Tactic
-
--- Test running infrastructure
-
-namespace Pantograph.Test
-
-def addPrefix (pref: String) (tests: List (String × α)): List (String  × α) :=
-  tests.map (λ (name, x) => (pref ++ "/" ++ name, x))
-
-/-- Runs test in parallel. Filters test name if given -/
-def runTestGroup (filter: Option String) (tests: List (String × IO LSpec.TestSeq)): IO LSpec.TestSeq := do
-  let tests: List (String × IO LSpec.TestSeq) := match filter with
-    | .some filter => tests.filter (λ (name, _) => filter.isPrefixOf name)
-    | .none => tests
-  let tasks: List (String × Task _) ← tests.mapM (λ (name, task) => do
-    return (name, ← EIO.asTask task))
-  let all := tasks.foldl (λ acc (name, task) =>
-    let v: Except IO.Error LSpec.TestSeq := Task.get task
-    match v with
-    | .ok case => acc ++ (LSpec.group name case)
-    | .error e => acc ++ (expectationFailure name e.toString)
-    ) LSpec.TestSeq.done
-  return all
-
-end Pantograph.Test
 
 open Pantograph.Test
 
-/-- Main entry of tests; Provide an argument to filter tests by prefix -/
-def main (args: List String) := do
-  let name_filter := args.head?
+unsafe def main := do
+  Lean.enableInitializersExecution
   Lean.initSearchPath (← Lean.findSysroot)
-  let env_default: Lean.Environment ← Lean.importModules
-    (imports := #[`Init])
-    (opts := {})
-    (trustLevel := 1)
 
-  let suites: List (String × List (String × IO LSpec.TestSeq)) := [
-    ("Environment", Environment.suite),
-    ("Frontend", Frontend.suite env_default),
-    ("Integration", Integration.suite env_default),
-    ("Library", Library.suite env_default),
-    ("Metavar", Metavar.suite env_default),
-    ("Proofs", Proofs.suite env_default),
-    ("Serial", Serial.suite env_default),
-    ("Tactic/Congruence", Tactic.Congruence.suite env_default),
-    ("Tactic/Motivated Apply", Tactic.MotivatedApply.suite env_default),
-    ("Tactic/No Confuse", Tactic.NoConfuse.suite env_default),
-    ("Tactic/Prograde", Tactic.Prograde.suite env_default),
+  let suites := [
+    test_integration,
+    test_proofs,
+    test_serial
   ]
-  let tests: List (String × IO LSpec.TestSeq) := suites.foldl (λ acc (name, suite) => acc ++ (addPrefix name suite)) []
-  LSpec.lspecIO (← runTestGroup name_filter tests)
+  let all ← suites.foldlM (λ acc m => do pure $ acc ++ (← m)) LSpec.TestSeq.done
+  LSpec.lspecIO $ all

Test/Metavar.lean

@@ -1,285 +0,0 @@
-import LSpec
-import Pantograph.Goal
-import Pantograph.Serial
-import Test.Common
-import Lean
-
-namespace Pantograph.Test.Metavar
-open Pantograph
-open Lean
-
-abbrev TestM := StateRefT LSpec.TestSeq (ReaderT Protocol.Options Elab.TermElabM)
-
-def addTest (test: LSpec.TestSeq): TestM Unit := do
-  set $ (← get) ++ test
-
--- Tests that all delay assigned mvars are instantiated
-def test_instantiate_mvar: TestM Unit := do
-  let env ← Lean.MonadEnv.getEnv
-  let value := "@Nat.le_trans 2 2 5 (@of_eq_true (@LE.le Nat instLENat 2 2) (@eq_true (@LE.le Nat instLENat 2 2) (@Nat.le_refl 2))) (@of_eq_true (@LE.le Nat instLENat 2 5) (@eq_true_of_decide (@LE.le Nat instLENat 2 5) (@Nat.decLe 2 5) (@Eq.refl Bool Bool.true)))"
-  let syn ← match parseTerm env value with
-    | .ok s => pure $ s
-    | .error e => do
-      addTest $ assertUnreachable e
-      return ()
-  let expr ← match ← elabTerm syn with
-    | .ok expr => pure $ expr
-    | .error e => do
-      addTest $ assertUnreachable e
-      return ()
-  let t ← Lean.Meta.inferType expr
-  addTest $ LSpec.check "typing" ((toString (← serializeExpressionSexp t)) =
-    "((:c LE.le) (:c Nat) (:c instLENat) ((:c OfNat.ofNat) (:mv _uniq.2) (:lit 2) (:mv _uniq.3)) ((:c OfNat.ofNat) (:mv _uniq.14) (:lit 5) (:mv _uniq.15)))")
-  return ()
-
-
-
-def startProof (expr: String): TestM (Option GoalState) := do
-  let env ← Lean.MonadEnv.getEnv
-  let syn? := parseTerm env expr
-  addTest $ LSpec.check s!"Parsing {expr}" (syn?.isOk)
-  match syn? with
-  | .error error =>
-    IO.println error
-    return Option.none
-  | .ok syn =>
-    let expr? ← elabType syn
-    addTest $ LSpec.check s!"Elaborating" expr?.isOk
-    match expr? with
-    | .error error =>
-      IO.println error
-      return Option.none
-    | .ok expr =>
-      let goal ← GoalState.create (expr := expr)
-      return Option.some goal
-
-def buildGoal (nameType: List (String × String)) (target: String) (userName?: Option String := .none): Protocol.Goal :=
-  {
-    userName?,
-    target := { pp? := .some target},
-    vars := (nameType.map fun x => ({
-      userName := x.fst,
-      type? := .some { pp? := .some x.snd },
-    })).toArray
-  }
-def proofRunner (env: Lean.Environment) (tests: TestM Unit): IO LSpec.TestSeq := do
-  let termElabM := tests.run LSpec.TestSeq.done |>.run {} -- with default options
-
-  let coreContext: Lean.Core.Context ← createCoreContext #[]
-  let metaM := termElabM.run' (ctx := Condensed.elabContext)
-  let coreM := metaM.run'
-  match ← (coreM.run' coreContext { env := env }).toBaseIO with
-  | .error exception =>
-    return LSpec.test "Exception" (s!"internal exception #{← exception.toMessageData.toString}" = "")
-  | .ok (_, a) =>
-    return a
-
-/-- M-coupled goals -/
-def test_m_couple: TestM Unit := do
-  let state? ← startProof "(2: Nat) ≤ 5"
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
-
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := "apply Nat.le_trans") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "apply Nat.le_trans" ((← state1.serializeGoals (options := ← read)).map (·.target.pp?) =
-    #[.some "2 ≤ ?m", .some "?m ≤ 5", .some "Nat"])
-  addTest $ LSpec.test "(1 root)" state1.rootExpr?.isNone
-  -- Set m to 3
-  let state2 ← match ← state1.tacticOn (goalId := 2) (tactic := "exact 3") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.test "(1b root)" state2.rootExpr?.isNone
-  let state1b ← match state2.continue state1 with
-    | .error msg => do
-      addTest $ assertUnreachable $ msg
-      return ()
-    | .ok state => pure state
-  addTest $ LSpec.check "exact 3" ((← state1b.serializeGoals (options := ← read)).map (·.target.pp?) =
-    #[.some "2 ≤ 3", .some "3 ≤ 5"])
-  addTest $ LSpec.test "(2 root)" state1b.rootExpr?.isNone
-
-def test_m_couple_simp: TestM Unit := do
-  let state? ← startProof "(2: Nat) ≤ 5"
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
-
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := "apply Nat.le_trans") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  let serializedState1 ← state1.serializeGoals (options := { ← read with printDependentMVars := true })
-  addTest $ LSpec.check "apply Nat.le_trans" (serializedState1.map (·.target.pp?) =
-    #[.some "2 ≤ ?m", .some "?m ≤ 5", .some "Nat"])
-  addTest $ LSpec.check "(metavariables)" (serializedState1.map (·.target.dependentMVars?.get!) =
-    #[#["_uniq.38"], #["_uniq.38"], #[]])
-
-  let state2 ← match ← state1.tacticOn (goalId := 2) (tactic := "exact 2") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.test "(1b root)" state2.rootExpr?.isNone
-  let state1b ← match state2.continue state1 with
-    | .error msg => do
-      addTest $ assertUnreachable $ msg
-      return ()
-    | .ok state => pure state
-  addTest $ LSpec.check "exact 2" ((← state1b.serializeGoals (options := ← read)).map (·.target.pp?) =
-    #[.some "2 ≤ 2", .some "2 ≤ 5"])
-  addTest $ LSpec.test "(2 root)" state1b.rootExpr?.isNone
-  let state3 ← match ← state1b.tacticOn (goalId := 0) (tactic := "simp") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  let state4 ← match state3.continue state1b with
-    | .error msg => do
-      addTest $ assertUnreachable $ msg
-      return ()
-    | .ok state => pure state
-  let state5 ← match ← state4.tacticOn (goalId := 0) (tactic := "simp") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-
-  state5.restoreMetaM
-  let root ← match state5.rootExpr? with
-    | .some e => pure e
-    | .none =>
-      addTest $ assertUnreachable "(5 root)"
-      return ()
-  let rootStr: String := toString (← Lean.Meta.ppExpr root)
-  addTest $ LSpec.check "(5 root)" (rootStr = "Nat.le_trans (of_eq_true (Init.Data.Nat.Basic._auxLemma.4 2)) (of_eq_true (eq_true_of_decide (Eq.refl true)))")
-  let unfoldedRoot ←  unfoldAuxLemmas root
-  addTest $ LSpec.check "(5 root)" ((toString (← Lean.Meta.ppExpr unfoldedRoot)) =
-    "Nat.le_trans (of_eq_true (eq_true (Nat.le_refl 2))) (of_eq_true (eq_true_of_decide (Eq.refl true)))")
-  return ()
-
-def test_proposition_generation: TestM Unit := do
-  let state? ← startProof "Σ' p:Prop, p"
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
-
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := "apply PSigma.mk") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "apply PSigma.mk" ((← state1.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[
-      buildGoal [] "?fst" (userName? := .some "snd"),
-      buildGoal [] "Prop" (userName? := .some "fst")
-      ])
-  if let #[goal1, goal2] := ← state1.serializeGoals (options := { (← read) with printExprAST := true }) then
-    addTest $ LSpec.test "(1 reference)" (goal1.target.sexp? = .some s!"(:mv {goal2.name})")
-  addTest $ LSpec.test "(1 root)" state1.rootExpr?.isNone
-
-  let state2 ← match ← state1.tryAssign (state1.get! 0) (expr := "λ (x: Nat) => _") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check ":= λ (x: Nat), _" ((← state2.serializeGoals (options := ← read)).map (·.target.pp?) =
-    #[.some "?m.29 x"])
-  addTest $ LSpec.test "(2 root)" state2.rootExpr?.isNone
-
-  let assign := "Eq.refl x"
-  let state3 ← match ← state2.tryAssign (state2.get! 0) (expr := assign) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!":= {assign}" ((← state3.serializeGoals (options := ← read)).map (·.target.pp?) =
-    #[])
-
-  addTest $ LSpec.test "(3 root)" state3.rootExpr?.isSome
-  return ()
-
-def test_partial_continuation: TestM Unit := do
-  let state? ← startProof "(2: Nat) ≤ 5"
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
-
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := "apply Nat.le_trans") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "apply Nat.le_trans" ((← state1.serializeGoals (options := ← read)).map (·.target.pp?) =
-    #[.some "2 ≤ ?m", .some "?m ≤ 5", .some "Nat"])
-
-  let state2 ← match ← state1.tacticOn (goalId := 2) (tactic := "apply Nat.succ") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "apply Nat.succ" ((← state2.serializeGoals (options := ← read)).map (·.target.pp?) =
-    #[.some "Nat"])
-
-  -- Execute a partial continuation
-  let coupled_goals := state1.goals ++ state2.goals
-  let state1b ← match state2.resume (goals := coupled_goals) with
-    | .error msg => do
-      addTest $ assertUnreachable $ msg
-      return ()
-    | .ok state => pure state
-  addTest $ LSpec.check "(continue)" ((← state1b.serializeGoals (options := ← read)).map (·.target.pp?) =
-    #[.some "2 ≤ ?m.succ", .some "?m.succ ≤ 5", .some "Nat"])
-  addTest $ LSpec.test "(2 root)" state1b.rootExpr?.isNone
-
-  -- Roundtrip
-  --let coupled_goals := coupled_goals.map (λ g =>
-  --  { name := str_to_name $ serializeName g.name (sanitize := false)})
-  let coupled_goals := coupled_goals.map (λ g => serializeName g.name (sanitize := false))
-  let coupled_goals := coupled_goals.map (λ g => { name := g.toName })
-  let state1b ← match state2.resume (goals := coupled_goals) with
-    | .error msg => do
-      addTest $ assertUnreachable $ msg
-      return ()
-    | .ok state => pure state
-  addTest $ LSpec.check "(continue)" ((← state1b.serializeGoals (options := ← read)).map (·.target.pp?) =
-    #[.some "2 ≤ ?m.succ", .some "?m.succ ≤ 5", .some "Nat"])
-  addTest $ LSpec.test "(2 root)" state1b.rootExpr?.isNone
-
-  -- Continuation should fail if the state does not exist:
-  match state0.resume coupled_goals with
-  | .error error => addTest $ LSpec.check "(continuation failure message)" (error = "Goals [_uniq.40, _uniq.41, _uniq.38, _uniq.47] are not in scope")
-  | .ok _ => addTest $ assertUnreachable "(continuation failure)"
-  -- Continuation should fail if some goals have not been solved
-  match state2.continue state1 with
-  | .error error => addTest $ LSpec.check "(continuation failure message)" (error = "Target state has unresolved goals")
-  | .ok _ => addTest $ assertUnreachable "(continuation failure)"
-  return ()
-
-
-def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
-  let tests := [
-    ("Instantiate", test_instantiate_mvar),
-    ("2 < 5", test_m_couple),
-    ("2 < 5", test_m_couple_simp),
-    ("Proposition Generation", test_proposition_generation),
-    ("Partial Continuation", test_partial_continuation)
-  ]
-  tests.map (fun (name, test) => (name, proofRunner env test))
-
-end Pantograph.Test.Metavar

Test/Proofs.lean

@@ -1,12 +1,8 @@
-/-
-Tests pertaining to goals with no interdependencies
--/
 import LSpec
-import Pantograph.Goal
+import Pantograph.Tactic
 import Pantograph.Serial
-import Test.Common
 
-namespace Pantograph.Test.Proofs
+namespace Pantograph.Test
 open Pantograph
 open Lean
 
@@ -14,17 +10,21 @@ inductive Start where
   | copy (name: String) -- Start from some name in the environment
   | expr (expr: String) -- Start from some expression
 
-abbrev TestM := StateRefT LSpec.TestSeq (ReaderT Protocol.Options Elab.TermElabM)
+abbrev TestM := StateRefT LSpec.TestSeq (ReaderT Commands.Options M)
 
-def addTest (test: LSpec.TestSeq): TestM Unit := do
+deriving instance DecidableEq, Repr for Commands.Expression
+deriving instance DecidableEq, Repr for Commands.Variable
+deriving instance DecidableEq, Repr for Commands.Goal
+
+def add_test (test: LSpec.TestSeq): TestM Unit := do
   set $ (← get) ++ test
 
-def startProof (start: Start): TestM (Option GoalState) := do
+def start_proof (start: Start): TestM (Option GoalState) := do
   let env ← Lean.MonadEnv.getEnv
   match start with
   | .copy name =>
-    let cInfo? := name.toName |> env.find?
-    addTest $ LSpec.check s!"Symbol exists {name}" cInfo?.isSome
+    let cInfo? := str_to_name name |> env.find?
+    add_test $ LSpec.check s!"Symbol exists {name}" cInfo?.isSome
     match cInfo? with
     | .some cInfo =>
       let goal ← GoalState.create (expr := cInfo.type)
@@ -32,15 +32,15 @@ def startProof (start: Start): TestM (Option GoalState) := do
     | .none =>
       return Option.none
   | .expr expr =>
-    let syn? := parseTerm env expr
-    addTest $ LSpec.check s!"Parsing {expr}" (syn?.isOk)
+    let syn? := syntax_from_str env expr
+    add_test $ LSpec.check s!"Parsing {expr}" (syn?.isOk)
     match syn? with
     | .error error =>
       IO.println error
       return Option.none
     | .ok syn =>
-      let expr? ← elabType syn
-      addTest $ LSpec.check s!"Elaborating" expr?.isOk
+      let expr? ← syntax_to_expr syn
+      add_test $ LSpec.check s!"Elaborating" expr?.isOk
       match expr? with
       | .error error =>
         IO.println error
@@ -49,169 +49,72 @@ def startProof (start: Start): TestM (Option GoalState) := do
         let goal ← GoalState.create (expr := expr)
         return Option.some goal
 
-def buildNamedGoal (name: String) (nameType: List (String × String)) (target: String)
-    (userName?: Option String := .none): Protocol.Goal :=
+def assert_unreachable (message: String): LSpec.TestSeq := LSpec.check message false
+
+def build_goal (nameType: List (String × String)) (target: String): Commands.Goal :=
   {
-    name,
-    userName?,
     target := { pp? := .some target},
     vars := (nameType.map fun x => ({
-      userName := x.fst,
+      name := x.fst,
       type? := .some { pp? := .some x.snd },
+      isInaccessible? := .some false
     })).toArray
   }
-def buildGoal (nameType: List (String × String)) (target: String) (userName?: Option String := .none):
-    Protocol.Goal :=
+-- Like `build_goal` but allow certain variables to be elided.
+def build_goal_selective (nameType: List (String × Option String)) (target: String): Commands.Goal :=
   {
-    userName?,
     target := { pp? := .some target},
     vars := (nameType.map fun x => ({
-      userName := x.fst,
-      type? := .some { pp? := .some x.snd },
+      name := x.fst,
+      type? := x.snd.map (λ type => { pp? := type }),
+      isInaccessible? := x.snd.map (λ _ => false)
     })).toArray
   }
-def proofRunner (env: Lean.Environment) (tests: TestM Unit): IO LSpec.TestSeq := do
-  let termElabM := tests.run LSpec.TestSeq.done |>.run {} -- with default options
 
-  let coreContext: Lean.Core.Context ← createCoreContext #[]
-  let metaM := termElabM.run' (ctx := Condensed.elabContext)
-  let coreM := metaM.run'
-  match ← (coreM.run' coreContext { env := env }).toBaseIO with
-  | .error exception =>
-    return LSpec.test "Exception" (s!"internal exception #{← exception.toMessageData.toString}" = "")
-  | .ok (_, a) =>
-    return a
-
-def test_identity: TestM Unit := do
-  let state? ← startProof (.expr "∀ (p: Prop), p → p")
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
-
-  let tactic := "intro p h"
-  let state1 ← match ← state0.tacticOn 0 tactic with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  let inner := "_uniq.12"
-  addTest $ LSpec.check tactic ((← state1.serializeGoals (options := ← read)).map (·.name) =
-    #[inner])
-  let state1parent ← state1.withParentContext do
-    serializeExpressionSexp (← instantiateAll state1.parentExpr?.get!) (sanitize := false)
-  addTest $ LSpec.test "(1 parent)" (state1parent == s!"(:lambda p (:sort 0) (:lambda h 0 (:subst (:mv {inner}) 1 0)))")
 
 -- Individual test cases
 example: ∀ (a b: Nat), a + b = b + a := by
   intro n m
   rw [Nat.add_comm]
-def test_nat_add_comm (manual: Bool): TestM Unit := do
-  let state? ← startProof <| match manual with
-    | false => .copy "Nat.add_comm"
-    | true => .expr "∀ (a b: Nat), a + b = b + a"
-  addTest $ LSpec.check "Start goal" state?.isSome
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
+def proof_nat_add_comm: TestM Unit := do
+  let goal? ← start_proof (.copy "Nat.add_comm")
+  add_test $ LSpec.check "Start goal" goal?.isSome
+  if let .some goal := goal? then
+    if let .success #[(goal, sGoal)] ← goal.execute "intro n m" then
+      let sGoal1e: Commands.Goal := build_goal [("n", "Nat"), ("m", "Nat")] "n + m = m + n"
+      add_test $ LSpec.check "intro n m" (sGoal = sGoal1e)
 
-  let state1 ← match ← state0.tacticOn 0 "intro n m" with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "intro n m" ((← state1.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[buildGoal [("n", "Nat"), ("m", "Nat")] "n + m = m + n"])
+      if let .failure #[message] ← goal.execute "assumption" then
+        add_test $ LSpec.check "assumption" (message = "tactic 'assumption' failed\nn m : Nat\n⊢ n + m = m + n")
+      else
+        add_test $ assert_unreachable "assumption"
 
-  match ← state1.tacticOn 0 "assumption" with
-  | .failure #[message] =>
-    addTest $ LSpec.check "assumption" (message = "tactic 'assumption' failed\nn m : Nat\n⊢ n + m = m + n")
-  | other => do
-    addTest $ assertUnreachable $ other.toString
+      if let .success #[] ← goal.execute "rw [Nat.add_comm]" then
+        return ()
+      else
+        add_test $ assert_unreachable "rw [Nat.add_comm]"
+    else
+      add_test $ assert_unreachable "intro n m"
+def proof_nat_add_comm_manual: TestM Unit := do
+  let goal? ← start_proof (.expr "∀ (a b: Nat), a + b = b + a")
+  add_test $ LSpec.check "Start goal" goal?.isSome
+  if let .some goal := goal? then
+    if let .success #[(goal, sGoal)] ← goal.execute "intro n m" then
+      let sGoal1e: Commands.Goal := build_goal [("n", "Nat"), ("m", "Nat")] "n + m = m + n"
+      add_test $ LSpec.check "intro n m" (sGoal = sGoal1e)
 
-  let state2 ← match ← state1.tacticOn 0 "rw [Nat.add_comm]" with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.test "rw [Nat.add_comm]" state2.goals.isEmpty
+      if let .failure #[message] ← goal.execute "assumption" then
+        add_test $ LSpec.check "assumption" (message = "tactic 'assumption' failed\nn m : Nat\n⊢ n + m = m + n")
+      else
+        add_test $ assert_unreachable "assumption"
 
-  return ()
-def test_delta_variable: TestM Unit := do
-  let options: Protocol.Options := { noRepeat := true }
-  let state? ← startProof <| .expr "∀ (a b: Nat), a + b = b + a"
-  addTest $ LSpec.check "Start goal" state?.isSome
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
+      if let .success #[] ← goal.execute "rw [Nat.add_comm]" then
+        return ()
+      else
+        add_test $ assert_unreachable "rw [Nat.add_comm]"
+    else
+      add_test $ assert_unreachable "intro n m"
 
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := "intro n") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "intro n" ((← state1.serializeGoals (parent := state0) options).map (·.devolatilize) =
-    #[buildGoalSelective [("n", .some "Nat")] "∀ (b : Nat), n + b = b + n"])
-  let state2 ← match ← state1.tacticOn (goalId := 0) (tactic := "intro m") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "intro m" ((← state2.serializeGoals (parent := state1) options).map (·.devolatilize) =
-    #[buildGoalSelective [("n", .none), ("m", .some "Nat")] "n + m = m + n"])
-  return ()
-  where
--- Like `buildGoal` but allow certain variables to be elided.
-  buildGoalSelective (nameType: List (String × Option String)) (target: String): Protocol.Goal :=
-    {
-      target := { pp? := .some target},
-      vars := (nameType.map fun x => ({
-        userName := x.fst,
-        type? := x.snd.map (λ type => { pp? := type }),
-      })).toArray
-    }
-
-example (w x y z : Nat) (p : Nat → Prop)
-        (h : p (x * y + z * w * x)) : p (x * w * z + y * x) := by
-  simp [Nat.add_assoc, Nat.add_comm, Nat.add_left_comm, Nat.mul_comm, Nat.mul_assoc, Nat.mul_left_comm] at *
-  assumption
-def test_arith: TestM Unit := do
-  let state? ← startProof (.expr "∀ (w x y z : Nat) (p : Nat → Prop) (h : p (x * y + z * w * x)), p (x * w * z + y * x)")
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
-
-  let tactic := "intros"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic (state1.goals.length = 1)
-  addTest $ LSpec.test "(1 root)" state1.rootExpr?.isNone
-  let state2 ← match ← state1.tacticOn (goalId := 0) (tactic := "simp [Nat.add_assoc, Nat.add_comm, Nat.add_left_comm, Nat.mul_comm, Nat.mul_assoc, Nat.mul_left_comm] at *") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "simp ..." (state2.goals.length = 1)
-  addTest $ LSpec.check "(2 root)" state2.rootExpr?.isNone
-  let tactic := "assumption"
-  let state3 ← match ← state2.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.test tactic state3.goals.isEmpty
-  addTest $ LSpec.check "(3 root)" state3.rootExpr?.isSome
-  return ()
 
 -- Two ways to write the same theorem
 example: ∀ (p q: Prop), p ∨ q → q ∨ p := by
@@ -228,497 +131,122 @@ example: ∀ (p q: Prop), p ∨ q → q ∨ p := by
     assumption
   . apply Or.inl
     assumption
-def test_or_comm: TestM Unit := do
-  let state? ← startProof (.expr "∀ (p q: Prop), p ∨ q → q ∨ p")
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
-  addTest $ LSpec.check "(0 parent)" state0.parentExpr?.isNone
-  addTest $ LSpec.check "(0 root)" state0.rootExpr?.isNone
+def proof_or_comm: TestM Unit := do
+  let typeProp: Commands.Expression := { pp? := .some "Prop" }
+  let branchGoal (caseName name: String): Commands.Goal := {
+    caseName? := .some caseName,
+    target := { pp? := .some "q ∨ p" },
+    vars := #[
+      { name := "p", type? := .some typeProp, isInaccessible? := .some false },
+      { name := "q", type? := .some typeProp, isInaccessible? := .some false },
+      { name := "h✝", type? := .some { pp? := .some name }, isInaccessible? := .some true }
+    ]
+  }
+  let goal? ← start_proof (.expr "∀ (p q: Prop), p ∨ q → q ∨ p")
+  add_test $ LSpec.check "Start goal" goal?.isSome
+  if let .some goal := goal? then
+    if let .success #[(goal, sGoal)] ← goal.execute "intro p q h" then
+      let sGoal1e := build_goal [("p", "Prop"), ("q", "Prop"), ("h", "p ∨ q")] "q ∨ p"
+      add_test $ LSpec.check "intro p q h" (sGoal = sGoal1e)
 
-  let tactic := "intro p q h"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  let fvP := "_uniq.10"
-  let fvQ := "_uniq.13"
-  let fvH := "_uniq.16"
-  let state1g0 := "_uniq.17"
-  addTest $ LSpec.check tactic ((← state1.serializeGoals (options := ← read)) =
-    #[{
-      name := state1g0,
-      target := { pp? := .some "q ∨ p" },
-      vars := #[
-        { name := fvP, userName := "p", type? := .some { pp? := .some "Prop" } },
-        { name := fvQ, userName := "q", type? := .some { pp? := .some "Prop" } },
-        { name := fvH, userName := "h", type? := .some { pp? := .some "p ∨ q" } }
-      ]
-    }])
-  addTest $ LSpec.check "(1 parent)" state1.parentExpr?.isSome
-  addTest $ LSpec.check "(1 root)" state1.rootExpr?.isNone
+      if let .success #[(goal1, sGoal1), (goal2, sGoal2)] ← goal.execute "cases h" then
+        add_test $ LSpec.check "cases h/1" (sGoal1 = branchGoal "inl" "p")
+        if let .success #[(goal, _)] ← goal1.execute "apply Or.inr" then
+          if let .success #[] ← goal.execute "assumption" then
+            return ()
+          else
+            add_test $ assert_unreachable "assumption"
+        else
+          add_test $ assert_unreachable "apply Or.inr"
 
-  let state1parent ← state1.withParentContext do
-    serializeExpressionSexp (← instantiateAll state1.parentExpr?.get!) (sanitize := false)
-  addTest $ LSpec.test "(1 parent)" (state1parent == s!"(:lambda p (:sort 0) (:lambda q (:sort 0) (:lambda h ((:c Or) 1 0) (:subst (:mv {state1g0}) 2 1 0))))")
-  let tactic := "cases h"
-  let state2 ← match ← state1.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state2.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[branchGoal "inl" "p", branchGoal "inr" "q"])
-  let (caseL, caseR) := ("_uniq.64", "_uniq.77")
-  addTest $ LSpec.check tactic ((← state2.serializeGoals (options := ← read)).map (·.name) =
-    #[caseL, caseR])
-  addTest $ LSpec.check "(2 parent exists)" state2.parentExpr?.isSome
-  addTest $ LSpec.check "(2 root)" state2.rootExpr?.isNone
 
-  let state2parent ← state2.withParentContext do
-    serializeExpressionSexp (← instantiateAll state2.parentExpr?.get!) (sanitize := false)
-  let orPQ := s!"((:c Or) (:fv {fvP}) (:fv {fvQ}))"
-  let orQP := s!"((:c Or) (:fv {fvQ}) (:fv {fvP}))"
-  let motive := s!"(:lambda t._@._hyg.26 {orPQ} (:forall h ((:c Eq) ((:c Or) (:fv {fvP}) (:fv {fvQ})) (:fv {fvH}) 0) {orQP}))"
-  let caseL := s!"(:lambda h._@._hyg.27 (:fv {fvP}) (:lambda h._@._hyg.28 ((:c Eq) {orPQ} (:fv {fvH}) ((:c Or.inl) (:fv {fvP}) (:fv {fvQ}) 0)) (:subst (:mv {caseL}) (:fv {fvP}) (:fv {fvQ}) 1)))"
-  let caseR := s!"(:lambda h._@._hyg.29 (:fv {fvQ}) (:lambda h._@._hyg.30 ((:c Eq) {orPQ} (:fv {fvH}) ((:c Or.inr) (:fv {fvP}) (:fv {fvQ}) 0)) (:subst (:mv {caseR}) (:fv {fvP}) (:fv {fvQ}) 1)))"
-  let conduit := s!"((:c Eq.refl) {orPQ} (:fv {fvH}))"
-  addTest $ LSpec.test "(2 parent)" (state2parent ==
-    s!"((:c Or.casesOn) (:fv {fvP}) (:fv {fvQ}) {motive} (:fv {fvH}) {caseL} {caseR} {conduit})")
+        add_test $ LSpec.check "cases h/2" (sGoal2 = branchGoal "inr" "q")
+        if let .success #[(goal, _)] ← goal2.execute "apply Or.inl" then
+          if let .success #[] ← goal.execute "assumption" then
+            return ()
+          else
+            add_test $ assert_unreachable "assumption"
+        else
+          add_test $ assert_unreachable "apply Or.inl"
 
-  let state3_1 ← match ← state2.tacticOn (goalId := 0) (tactic := "apply Or.inr") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  let state3_1parent ← state3_1.withParentContext do
-    serializeExpressionSexp (← instantiateAll state3_1.parentExpr?.get!) (sanitize := false)
-  addTest $ LSpec.test "(3_1 parent)" (state3_1parent == s!"((:c Or.inr) (:fv {fvQ}) (:fv {fvP}) (:mv _uniq.91))")
-  addTest $ LSpec.check "· apply Or.inr" (state3_1.goals.length = 1)
-  let state4_1 ← match ← state3_1.tacticOn (goalId := 0) (tactic := "assumption") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "  assumption" state4_1.goals.isEmpty
-  let state4_1parent ← instantiateAll state4_1.parentExpr?.get!
-  addTest $ LSpec.test "(4_1 parent)" state4_1parent.isFVar
-  addTest $ LSpec.check "(4_1 root)" state4_1.rootExpr?.isNone
-  let state3_2 ← match ← state2.tacticOn (goalId := 1) (tactic := "apply Or.inl") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "· apply Or.inl" (state3_2.goals.length = 1)
-  let state4_2 ← match ← state3_2.tacticOn (goalId := 0) (tactic := "assumption") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "  assumption" state4_2.goals.isEmpty
-  addTest $ LSpec.check "(4_2 root)" state4_2.rootExpr?.isNone
-  -- Ensure the proof can continue from `state4_2`.
-  let state2b ← match state4_2.continue state2 with
-    | .error msg => do
-      addTest $ assertUnreachable $ msg
-      return ()
-    | .ok state => pure state
-  addTest $ LSpec.test "(resume)" (state2b.goals == [state2.goals.get! 0])
-  let state3_1 ← match ← state2b.tacticOn (goalId := 0) (tactic := "apply Or.inr") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "· apply Or.inr" (state3_1.goals.length = 1)
-  let state4_1 ← match ← state3_1.tacticOn (goalId := 0) (tactic := "assumption") with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "  assumption" state4_1.goals.isEmpty
-  addTest $ LSpec.check "(4_1 root)" state4_1.rootExpr?.isSome
+      else
+        add_test $ assert_unreachable "cases h"
+    else
+      add_test $ assert_unreachable "intro p q h"
 
-  return ()
-  where
-    typeProp: Protocol.Expression := { pp? := .some "Prop" }
-    branchGoal (caseName varName: String): Protocol.Goal := {
-      userName? := .some caseName,
-      target := { pp? := .some "q ∨ p" },
-      vars := #[
-        { userName := "p", type? := .some typeProp },
-        { userName := "q", type? := .some typeProp },
-        { userName := "h✝", type? := .some { pp? := .some varName }, isInaccessible := true }
-      ]
-    }
+example (w x y z : Nat) (p : Nat → Prop)
+        (h : p (x * y + z * w * x)) : p (x * w * z + y * x) := by
+  simp [Nat.add_assoc, Nat.add_comm, Nat.add_left_comm, Nat.mul_comm, Nat.mul_assoc, Nat.mul_left_comm] at *
+  assumption
+def proof_arith_1: TestM Unit := do
+  let goal? ← start_proof (.expr "∀ (w x y z : Nat) (p : Nat → Prop) (h : p (x * y + z * w * x)), p (x * w * z + y * x)")
+  add_test $ LSpec.check "Start goal" goal?.isSome
+  if let .some goal := goal? then
+    if let .success #[(goal, _)] ← goal.execute "intros" then
+      if let .success #[(goal, _)] ← goal.execute "simp [Nat.add_assoc, Nat.add_comm, Nat.add_left_comm, Nat.mul_comm, Nat.mul_assoc, Nat.mul_left_comm] at *" then
+        if let .success #[] ← goal.execute "assumption" then
+          return ()
+        else
+          add_test $ assert_unreachable "assumption"
+      else
+        add_test $ assert_unreachable "simp ..."
+    else
+      add_test $ assert_unreachable "intros"
 
-example : ∀ (a b c1 c2: Nat), (b + a) + c1 = (b + a) + c2 → (a + b) + c1 = (b + a) + c2 := by
-  intro a b c1 c2 h
-  conv =>
-    lhs
-    congr
-    . rw [Nat.add_comm]
-    . rfl
-  exact h
+def proof_delta_variable: TestM Unit := withReader (fun _ => {proofVariableDelta := true}) do
+  let goal? ← start_proof (.expr "∀ (a b: Nat), a + b = b + a")
+  add_test $ LSpec.check "Start goal" goal?.isSome
+  if let .some goal := goal? then
+    if let .success #[(goal, sGoal)] ← goal.execute "intro n" then
+      let sGoal1e: Commands.Goal := build_goal_selective [("n", .some "Nat")] "∀ (b : Nat), n + b = b + n"
+      add_test $ LSpec.check "intro n" (sGoal = sGoal1e)
 
-def test_conv: TestM Unit := do
-  let state? ← startProof (.expr "∀ (a b c1 c2: Nat), (b + a) + c1 = (b + a) + c2 → (a + b) + c1 = (b + a) + c2")
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
+      if let .success #[(_, sGoal)] ← goal.execute "intro m" then
+        let sGoal2e: Commands.Goal := build_goal_selective [("n", .none), ("m", .some "Nat")] "n + m = m + n"
+        add_test $ LSpec.check "intro m" (sGoal = sGoal2e)
+      else
+        add_test $ assert_unreachable "intro m"
+    else
+      add_test $ assert_unreachable "intro n"
 
-  let tactic := "intro a b c1 c2 h"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state1.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[interiorGoal [] "a + b + c1 = b + a + c2"])
+def proof_runner (env: Lean.Environment) (tests: TestM Unit): IO LSpec.TestSeq := do
+  let termElabM := tests.run LSpec.TestSeq.done |>.run {} -- with default options
 
-  let state2 ← match ← state1.conv (state1.get! 0) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check "conv => ..." ((← state2.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[{ interiorGoal [] "a + b + c1 = b + a + c2" with isConversion := true }])
+  let coreContext: Lean.Core.Context := {
+    currNamespace := str_to_name "Aniva",
+    openDecls := [],     -- No 'open' directives needed
+    fileName := "<Pantograph>",
+    fileMap := { source := "", positions := #[0], lines := #[1] }
+  }
+  let metaM := termElabM.run' (ctx := {
+    declName? := some "_pantograph",
+    errToSorry := false
+  })
+  let coreM := metaM.run'
+  match ← (coreM.run' coreContext { env := env }).toBaseIO with
+  | .error exception =>
+    return LSpec.test "Exception" (s!"internal exception #{← exception.toMessageData.toString}" = "")
+  | .ok (_, a) =>
+    return a
 
-  let convTactic := "rhs"
-  let state3R ← match ← state2.tacticOn (goalId := 0) convTactic with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"  {convTactic} (discard)" ((← state3R.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[{ interiorGoal [] "b + a + c2" with isConversion := true }])
-
-  let convTactic := "lhs"
-  let state3L ← match ← state2.tacticOn (goalId := 0) convTactic with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"  {convTactic}" ((← state3L.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[{ interiorGoal [] "a + b + c1" with isConversion := true }])
-
-  let convTactic := "congr"
-  let state4 ← match ← state3L.tacticOn (goalId := 0) convTactic with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"  {convTactic}" ((← state4.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[
-      { interiorGoal [] "a + b" with isConversion := true, userName? := .some "a" },
-      { interiorGoal [] "c1" with isConversion := true, userName? := .some "a" }
-    ])
-
-  let convTactic := "rw [Nat.add_comm]"
-  let state5_1 ← match ← state4.tacticOn (goalId := 0) convTactic with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"  · {convTactic}" ((← state5_1.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[{ interiorGoal [] "b + a" with isConversion := true, userName? := .some "a" }])
-
-  let convTactic := "rfl"
-  let state6_1 ← match ← state5_1.tacticOn (goalId := 0) convTactic with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"    {convTactic}" ((← state6_1.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[])
-
-  let state4_1 ← match state6_1.continue state4 with
-    | .ok state => pure state
-    | .error e => do
-      addTest $ expectationFailure "continue" e
-      return ()
-
-  let convTactic := "rfl"
-  let state6 ← match ← state4_1.tacticOn (goalId := 0) convTactic with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"  · {convTactic}" ((← state6.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[])
-
-  let state1_1 ← match ← state6.convExit with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-
-  let tactic := "exact h"
-  let stateF ← match ← state1_1.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← stateF.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[])
-
-  where
-    h := "b + a + c1 = b + a + c2"
-    interiorGoal (free: List (String × String)) (target: String) :=
-      let free := [("a", "Nat"), ("b", "Nat"), ("c1", "Nat"), ("c2", "Nat"), ("h", h)] ++ free
-      buildGoal free target
-
-example : ∀ (a b c d: Nat), a + b = b + c → b + c = c + d → a + b = c + d := by
-  intro a b c d h1 h2
-  calc a + b = b + c := by apply h1
-    _ = c + d := by apply h2
-
-def test_calc: TestM Unit := do
-  let state? ← startProof (.expr "∀ (a b c d: Nat), a + b = b + c → b + c = c + d → a + b = c + d")
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
-  let tactic := "intro a b c d h1 h2"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state1.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[interiorGoal [] "a + b = c + d"])
-  let pred := "a + b = b + c"
-  let state2 ← match ← state1.tryCalc (state1.get! 0) (pred := pred) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"calc {pred} := _" ((← state2.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[
-      interiorGoal [] "a + b = b + c" (.some "calc"),
-      interiorGoal [] "b + c = c + d"
-    ])
-  addTest $ LSpec.test "(2.0 prev rhs)" (state2.calcPrevRhsOf? (state2.get! 0) |>.isNone)
-  addTest $ LSpec.test "(2.1 prev rhs)" (state2.calcPrevRhsOf? (state2.get! 1) |>.isSome)
-
-  let tactic := "apply h1"
-  let state2m ← match ← state2.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  let state3 ← match state2m.continue state2 with
-    | .ok state => pure state
-    | .error e => do
-      addTest $ expectationFailure "continue" e
-      return ()
-  let pred := "_ = c + d"
-  let state4 ← match ← state3.tryCalc (state3.get! 0) (pred := pred) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"calc {pred} := _" ((← state4.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[
-      interiorGoal [] "b + c = c + d" (.some "calc")
-    ])
-  addTest $ LSpec.test "(4.0 prev rhs)" (state4.calcPrevRhsOf? (state4.get! 0) |>.isNone)
-  let tactic := "apply h2"
-  let state4m ← match ← state4.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.test "(4m root)" state4m.rootExpr?.isSome
-  where
-    interiorGoal (free: List (String × String)) (target: String) (userName?: Option String := .none) :=
-      let free := [("a", "Nat"), ("b", "Nat"), ("c", "Nat"), ("d", "Nat"),
-        ("h1", "a + b = b + c"), ("h2", "b + c = c + d")] ++ free
-      buildGoal free target userName?
-
-def test_nat_zero_add: TestM Unit := do
-  let state? ← startProof (.expr "∀ (n: Nat), n + 0 = n")
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
-  let tactic := "intro n"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state1.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[buildGoal [("n", "Nat")] "n + 0 = n"])
-  let recursor := "@Nat.brecOn"
-  let state2 ← match ← state1.tryMotivatedApply (state1.get! 0) (recursor := recursor) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"mapply {recursor}" ((← state2.serializeGoals (options := ← read)).map (·.devolatilizeVars) =
-    #[
-      buildNamedGoal "_uniq.67" [("n", "Nat")] "Nat → Prop" (.some "motive"),
-      buildNamedGoal "_uniq.68" [("n", "Nat")] "Nat",
-      buildNamedGoal "_uniq.69" [("n", "Nat")] "∀ (t : Nat), Nat.below t → ?motive t",
-      buildNamedGoal "_uniq.70" [("n", "Nat")] "?motive ?m.68 = (n + 0 = n)" (.some "conduit")
-    ])
-
-  let tactic := "exact n"
-  let state3b ← match ← state2.tacticOn (goalId := 1) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state3b.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[])
-  let state2b ← match state3b.continue state2 with
-    | .ok state => pure state
-    | .error e => do
-      addTest $ assertUnreachable e
-      return ()
-  let tactic := "exact (λ x => x + 0 = x)"
-  let state3c ← match ← state2b.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state3c.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[])
-  let state2c ← match state3c.continue state2b with
-    | .ok state => pure state
-    | .error e => do
-      addTest $ assertUnreachable e
-      return ()
-  let tactic := "intro t h"
-  let state3 ← match ← state2c.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state3.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[buildGoal [("n", "Nat"), ("t", "Nat"), ("h", "Nat.below t")] "t + 0 = t"])
-
-  let tactic := "simp"
-  let state3d ← match ← state3.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  let state2d ← match state3d.continue state2c with
-    | .ok state => pure state
-    | .error e => do
-      addTest $ assertUnreachable e
-      return ()
-  let tactic := "rfl"
-  let stateF ← match ← state2d.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← stateF.serializeGoals (options := ← read)) =
-    #[])
-
-  let expr := stateF.mctx.eAssignment.find! stateF.root
-  let (expr, _) := instantiateMVarsCore (mctx := stateF.mctx) (e := expr)
-  addTest $ LSpec.check "(F root)" stateF.rootExpr?.isSome
-
-def test_nat_zero_add_alt: TestM Unit := do
-  let state? ← startProof (.expr "∀ (n: Nat), n + 0 = n")
-  let state0 ← match state? with
-    | .some state => pure state
-    | .none => do
-      addTest $ assertUnreachable "Goal could not parse"
-      return ()
-  let tactic := "intro n"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state1.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[buildGoal [("n", "Nat")] "n + 0 = n"])
-  let recursor := "@Nat.brecOn"
-  let state2 ← match ← state1.tryMotivatedApply (state1.get! 0) (recursor := recursor) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  let major := "_uniq.68"
-  addTest $ LSpec.check s!"mapply {recursor}" ((← state2.serializeGoals (options := ← read)).map (·.devolatilizeVars) =
-    #[
-      buildNamedGoal "_uniq.67" [("n", "Nat")] "Nat → Prop" (.some "motive"),
-      buildNamedGoal major [("n", "Nat")] "Nat",
-      buildNamedGoal "_uniq.69" [("n", "Nat")] "∀ (t : Nat), Nat.below t → ?motive t",
-      buildNamedGoal "_uniq.70" [("n", "Nat")] "?motive ?m.68 = (n + 0 = n)" (.some "conduit")
-    ])
-
-  let tactic := "intro x"
-  let state3m ← match ← state2.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state3m.serializeGoals (options := ← read)).map (·.devolatilize) =
-    #[buildGoal [("n", "Nat"), ("x", "Nat")] "Prop" (.some "motive")])
-  let tactic := "apply Eq"
-  let state3m2 ← match ← state3m.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  let (eqL, eqR, eqT) := ("_uniq.88", "_uniq.89", "_uniq.87")
-  addTest $ LSpec.check tactic $ state3m2.goals.map (·.name.toString) = [eqL, eqR, eqT]
-  let [_motive, _major, _step, conduit] := state2.goals | panic! "Goals conflict"
-  let state2b ← match state3m2.resume [conduit] with
-    | .ok state => pure state
-    | .error e => do
-      addTest $ assertUnreachable e
-      return ()
-
-  let cNatAdd := "(:c HAdd.hAdd) (:c Nat) (:c Nat) (:c Nat) ((:c instHAdd) (:c Nat) (:c instAddNat))"
-  let cNat0 := "((:c OfNat.ofNat) (:c Nat) (:lit 0) ((:c instOfNatNat) (:lit 0)))"
-  let fvN := "_uniq.63"
-  let conduitRight := s!"((:c Eq) (:c Nat) ({cNatAdd} (:fv {fvN}) {cNat0}) (:fv {fvN}))"
-  let substOf (mv: String) := s!"(:subst (:mv {mv}) (:fv {fvN}) (:mv {major}))"
-  addTest $ LSpec.check "resume" ((← state2b.serializeGoals (options := { ← read with printExprAST := true })) =
-    #[
-      {
-        name := "_uniq.70",
-        userName? := .some "conduit",
-        target := {
-          pp? := .some "(?m.92 ?m.68 = ?m.94 ?m.68) = (n + 0 = n)",
-          sexp? := .some s!"((:c Eq) (:sort 0) ((:c Eq) {substOf eqT} {substOf eqL} {substOf eqR}) {conduitRight})",
-        },
-        vars := #[{
-          name := fvN,
-          userName := "n",
-          type? := .some { pp? := .some "Nat", sexp? := .some "(:c Nat)" },
-        }],
-      }
-    ])
-
-def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
+def test_proofs : IO LSpec.TestSeq := do
+  let env: Lean.Environment ← Lean.importModules
+    (imports := ["Init"].map (λ str => { module := str_to_name str, runtimeOnly := false }))
+    (opts := {})
+    (trustLevel := 1)
   let tests := [
-    ("identity", test_identity),
-    ("Nat.add_comm", test_nat_add_comm false),
-    ("Nat.add_comm manual", test_nat_add_comm true),
-    ("Nat.add_comm delta", test_delta_variable),
-    ("arithmetic", test_arith),
-    ("Or.comm", test_or_comm),
-    ("conv", test_conv),
-    ("calc", test_calc),
-    ("Nat.zero_add", test_nat_zero_add),
-    ("Nat.zero_add alt", test_nat_zero_add_alt),
+    ("Nat.add_comm", proof_nat_add_comm),
+    ("nat.add_comm manual", proof_nat_add_comm_manual),
+    ("Or.comm", proof_or_comm),
+    ("arithmetic 1", proof_arith_1),
+    ("delta variable", proof_delta_variable)
   ]
-  tests.map (fun (name, test) => (name, proofRunner env test))
+  let tests ← tests.foldlM (fun acc tests => do
+    let (name, tests) := tests
+    let tests ← proof_runner env tests
+    return acc ++ (LSpec.group name tests)) LSpec.TestSeq.done
 
+  return LSpec.group "Proofs" tests
 
+end Pantograph.Test
 
-end Pantograph.Test.Proofs

Test/Serial.lean

@@ -1,109 +1,76 @@
 import LSpec
 import Pantograph.Serial
-import Test.Common
-import Lean
+import Pantograph.Symbols
 
-open Lean
-namespace Pantograph.Test.Serial
+namespace Pantograph.Test
 
 open Pantograph
+open Lean
 
-deriving instance Repr, DecidableEq for Protocol.BoundExpression
+deriving instance Repr, DecidableEq for Commands.BoundExpression
 
-def test_serializeName: LSpec.TestSeq :=
-  let quote := "\""
-  let escape := "\\"
-  LSpec.test "a.b.1" (serializeName (Name.num (.str (.str .anonymous "a") "b") 1) = "a.b.1") ++
-  LSpec.test "seg.«a.b»" (serializeName (Name.str (.str .anonymous "seg") "a.b") = s!"{quote}seg.«a.b»{quote}") ++
-  -- Pathological test case
-  LSpec.test s!"«̈{escape}{quote}»" (serializeName (Name.str .anonymous s!"{escape}{quote}") = s!"{quote}«{escape}{quote}»{quote}")
+def test_str_to_name: LSpec.TestSeq :=
+    LSpec.test "Symbol parsing" (Name.str (.str (.str .anonymous "Lean") "Meta") "run" = Pantograph.str_to_name "Lean.Meta.run")
 
 def test_expr_to_binder (env: Environment): IO LSpec.TestSeq := do
-  let entries: List (Name × Protocol.BoundExpression) := [
-    ("Nat.add_comm".toName, { binders := #[("n", "Nat"), ("m", "Nat")], target := "n + m = m + n" }),
-    ("Nat.le_of_succ_le".toName, { binders := #[("n", "Nat"), ("m", "Nat"), ("h", "n.succ ≤ m")], target := "n ≤ m" })
+  let entries: List (String × Commands.BoundExpression) := [
+    ("Nat.add_comm", { binders := #[("n", "Nat"), ("m", "Nat")], target := "n + m = m + n" }),
+    ("Nat.le_of_succ_le", { binders := #[("n", "Nat"), ("m", "Nat"), ("h", "Nat.succ n ≤ m")], target := "n ≤ m" })
   ]
-  runCoreMSeq env $ entries.foldlM (λ suites (symbol, target) => do
+  let coreM := entries.foldlM (λ suites (symbol, target) => do
     let env ← MonadEnv.getEnv
-    let expr := env.find? symbol |>.get! |>.type
-    let test := LSpec.check symbol.toString ((← typeExprToBound expr) = target)
+    let expr := str_to_name symbol |> env.find? |>.get! |>.type
+    let test := LSpec.check symbol ((← type_expr_to_bound expr) = target)
     return LSpec.TestSeq.append suites test) LSpec.TestSeq.done |>.run'
+  let coreContext: Core.Context := {
+    currNamespace := Lean.Name.str .anonymous "Aniva"
+    openDecls := [],     -- No 'open' directives needed
+    fileName := "<Pantograph/Test>",
+    fileMap := { source := "", positions := #[0], lines := #[1] }
+  }
+  match ← (coreM.run' coreContext { env := env }).toBaseIO with
+  | .error exception =>
+    return LSpec.test "Exception" (s!"internal exception #{← exception.toMessageData.toString}" = "")
+  | .ok a            => return a
 
 def test_sexp_of_symbol (env: Environment): IO LSpec.TestSeq := do
   let entries: List (String × String) := [
     -- This one contains unhygienic variable names which must be suppressed
-    ("Nat.add", "(:forall _ (:c Nat) (:forall _ (:c Nat) (:c Nat)))"),
+    ("Nat.add", "(:forall :anon (:c Nat) (:forall :anon (:c Nat) (:c Nat)))"),
     -- These ones are normal and easy
-    ("Nat.add_one", "(:forall n (:c Nat) ((:c Eq) (:c Nat) ((:c HAdd.hAdd) (:c Nat) (:c Nat) (:c Nat) ((:c instHAdd) (:c Nat) (:c instAddNat)) 0 ((:c OfNat.ofNat) (:c Nat) (:lit 1) ((:c instOfNatNat) (:lit 1)))) ((:c Nat.succ) 0)))"),
-    ("Nat.le_of_succ_le", "(:forall n (:c Nat) (:forall m (:c Nat) (:forall h ((:c LE.le) (:c Nat) (:c instLENat) ((:c Nat.succ) 1) 0) ((:c LE.le) (:c Nat) (:c instLENat) 2 1)) :implicit) :implicit)"),
+    ("Nat.add_one", "(:forall n (:c Nat) ((((:c Eq) (:c Nat)) (((((((:c HAdd.hAdd) (:c Nat)) (:c Nat)) (:c Nat)) (((:c instHAdd) (:c Nat)) (:c instAddNat))) 0) ((((:c OfNat.ofNat) (:c Nat)) (:lit 1)) ((:c instOfNatNat) (:lit 1))))) ((:c Nat.succ) 0)))"),
+    ("Nat.le_of_succ_le", "(:forall n (:c Nat) (:forall m (:c Nat) (:forall h (((((:c LE.le) (:c Nat)) (:c instLENat)) ((:c Nat.succ) 1)) 0) (((((:c LE.le) (:c Nat)) (:c instLENat)) 2) 1)) :implicit) :implicit)"),
     -- Handling of higher order types
     ("Or", "(:forall a (:sort 0) (:forall b (:sort 0) (:sort 0)))"),
     ("List", "(:forall α (:sort (+ u 1)) (:sort (+ u 1)))")
   ]
-  runMetaMSeq env $ entries.foldlM (λ suites (symbol, target) => do
+  let metaM: MetaM LSpec.TestSeq := entries.foldlM (λ suites (symbol, target) => do
     let env ← MonadEnv.getEnv
-    let expr := env.find? symbol.toName |>.get! |>.type
-    let test := LSpec.check symbol ((← serializeExpressionSexp expr) = target)
-    return LSpec.TestSeq.append suites test) LSpec.TestSeq.done
+    let expr := str_to_name symbol |> env.find? |>.get! |>.type
+    let test := LSpec.check symbol ((← serialize_expression_ast expr) = target)
+    return LSpec.TestSeq.append suites test) LSpec.TestSeq.done |>.run'
+  let coreM := metaM.run'
+  let coreContext: Core.Context := {
+    currNamespace := Lean.Name.str .anonymous "Aniva"
+    openDecls := [],     -- No 'open' directives needed
+    fileName := "<Pantograph/Test>",
+    fileMap := { source := "", positions := #[0], lines := #[1] }
+  }
+  match ← (coreM.run' coreContext { env := env }).toBaseIO with
+  | .error exception =>
+    return LSpec.test "Exception" (s!"internal exception #{← exception.toMessageData.toString}" = "")
+  | .ok a            => return a
 
-def test_sexp_of_elab (env: Environment): IO LSpec.TestSeq := do
-  let entries: List (String × (List Name) × String) := [
-    ("λ x: Nat × Bool => x.1", [], "(:lambda x ((:c Prod) (:c Nat) (:c Bool)) ((:c Prod.fst) (:c Nat) (:c Bool) 0))"),
-    ("λ x: Array Nat => x.data", [], "(:lambda x ((:c Array) (:c Nat)) ((:c Array.data) (:c Nat) 0))"),
-    ("λ {α: Sort (u + 1)} => List α", [`u], "(:lambda α (:sort (+ u 1)) ((:c List) 0) :implicit)"),
-    ("λ {α} => List α", [], "(:lambda α (:sort (+ (:mv _uniq.4) 1)) ((:c List) 0) :implicit)"),
-    ("(2: Nat) <= (5: Nat)", [], "((:c LE.le) (:mv _uniq.18) (:mv _uniq.19) ((:c OfNat.ofNat) (:mv _uniq.4) (:lit 2) (:mv _uniq.5)) ((:c OfNat.ofNat) (:mv _uniq.14) (:lit 5) (:mv _uniq.15)))"),
-  ]
-  entries.foldlM (λ suites (source, levels, target) =>
-    let termElabM := do
-      let env ← MonadEnv.getEnv
-      let s ← match parseTerm env source with
-        | .ok s => pure s
-        | .error e => return parseFailure e
-      let expr ← match (← elabTerm s) with
-        | .ok expr => pure expr
-        | .error e => return elabFailure e
-      return LSpec.check source ((← serializeExpressionSexp expr) = target)
-    let metaM := (Elab.Term.withLevelNames levels termElabM).run' (ctx := Condensed.elabContext)
-    return LSpec.TestSeq.append suites (← runMetaMSeq env metaM))
-    LSpec.TestSeq.done
 
-def test_sexp_of_expr (env: Environment): IO LSpec.TestSeq := do
-  let entries: List (Expr × String) := [
-    (.lam `p (.sort .zero)
-        (.lam `q (.sort .zero)
-          (.lam `k (mkApp2 (.const `And []) (.bvar 1) (.bvar 0))
-            (.proj `And 1 (.bvar 0))
-            .default)
-        .implicit)
-      .implicit,
-      "(:lambda p (:sort 0) (:lambda q (:sort 0) (:lambda k ((:c And) 1 0) ((:c And.right) _ _ 0)) :implicit) :implicit)"
-    ),
-  ]
-  let termElabM: Elab.TermElabM LSpec.TestSeq := entries.foldlM (λ suites (expr, target) => do
-    let env ← MonadEnv.getEnv
-    let testCaseName := target.take 10
-    let test := LSpec.check   testCaseName ((← serializeExpressionSexp expr) = target)
-    return LSpec.TestSeq.append suites test) LSpec.TestSeq.done
-  runMetaMSeq env $ termElabM.run' (ctx := Condensed.elabContext)
+def test_serial: IO LSpec.TestSeq := do
+  let env: Environment ← importModules
+    (imports := ["Init"].map (λ str => { module := str_to_name str, runtimeOnly := false }))
+    (opts := {})
+    (trustLevel := 1)
 
--- Instance parsing
-def test_instance (env: Environment): IO LSpec.TestSeq :=
-  runMetaMSeq env do
-    let env ← MonadEnv.getEnv
-    let source := "λ x y: Nat => HAdd.hAdd Nat Nat Nat (instHAdd Nat instAddNat) x y"
-    let s := parseTerm env source |>.toOption |>.get!
-    let _expr := (← runTermElabMInMeta <| elabTerm s) |>.toOption |>.get!
-    return LSpec.TestSeq.done
+  return LSpec.group "Serialisation" $
+    (LSpec.group "str_to_name" test_str_to_name) ++
+    (LSpec.group "Expression binder" (← test_expr_to_binder env)) ++
+    (LSpec.group "Sexp from symbol" (← test_sexp_of_symbol env))
 
-def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
-  [
-    ("serializeName", do pure test_serializeName),
-    ("Expression binder", test_expr_to_binder env),
-    ("Sexp from symbol", test_sexp_of_symbol env),
-    ("Sexp from elaborated expr", test_sexp_of_elab env),
-    ("Sexp from expr", test_sexp_of_expr env),
-    ("Instance", test_instance env),
-  ]
-
-end Pantograph.Test.Serial
+end Pantograph.Test

Test/Tactic.lean

@@ -1,4 +0,0 @@
-import Test.Tactic.Congruence
-import Test.Tactic.MotivatedApply
-import Test.Tactic.NoConfuse
-import Test.Tactic.Prograde

Test/Tactic/Congruence.lean

@@ -1,88 +0,0 @@
-import LSpec
-import Lean
-import Test.Common
-
-open Lean
-open Pantograph
-
-namespace Pantograph.Test.Tactic.Congruence
-
-def test_congr_arg_list : TestT Elab.TermElabM Unit := do
-  let expr := "λ {α} (l1 l2 : List α) (h: l1 = l2) => l1.reverse = l2.reverse"
-  let expr ← parseSentence expr
-  Meta.lambdaTelescope expr $ λ _ body => do
-    let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    let newGoals ← runTacticOnMVar Tactic.evalCongruenceArg target.mvarId!
-    addTest $ LSpec.check "goals" ((← newGoals.mapM (λ x => mvarUserNameAndType x)) =
-      [
-        (`α, "Sort ?u.30"),
-        (`a₁, "?α"),
-        (`a₂, "?α"),
-        (`f, "?α → List α"),
-        (`h, "?a₁ = ?a₂"),
-        (`conduit, "(?f ?a₁ = ?f ?a₂) = (l1.reverse = l2.reverse)"),
-      ])
-    let f := newGoals.get! 3
-    let h := newGoals.get! 4
-    let c := newGoals.get! 5
-    let results ← Meta.withAssignableSyntheticOpaque do f.apply (← parseSentence "List.reverse")
-    addTest $ LSpec.check "apply" (results.length = 0)
-    addTest $ LSpec.check "h" ((← exprToStr $ ← h.getType) = "?a₁ = ?a₂")
-    addTest $ LSpec.check "conduit" ((← exprToStr $ ← c.getType) = "(?a₁.reverse = ?a₂.reverse) = (l1.reverse = l2.reverse)")
-def test_congr_arg : TestT Elab.TermElabM Unit := do
-  let expr := "λ (n m: Nat) (h: n = m) => n * n = m * m"
-  let expr ← parseSentence expr
-  Meta.lambdaTelescope expr $ λ _ body => do
-    let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    let newGoals ← runTacticOnMVar Tactic.evalCongruenceArg target.mvarId!
-    addTest $  LSpec.check "goals" ((← newGoals.mapM (λ x => mvarUserNameAndType x)) =
-      [
-        (`α, "Sort ?u.70"),
-        (`a₁, "?α"),
-        (`a₂, "?α"),
-        (`f, "?α → Nat"),
-        (`h, "?a₁ = ?a₂"),
-        (`conduit, "(?f ?a₁ = ?f ?a₂) = (n * n = m * m)"),
-      ])
-def test_congr_fun : TestT Elab.TermElabM Unit := do
-  let expr := "λ (n m: Nat) => (n + m) + (n + m) = (n + m) * 2"
-  let expr ← parseSentence expr
-  Meta.lambdaTelescope expr $ λ _ body => do
-    let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    let newGoals ← runTacticOnMVar Tactic.evalCongruenceFun target.mvarId!
-    addTest $ LSpec.check "goals" ((← newGoals.mapM (λ x => mvarUserNameAndType x)) =
-      [
-        (`α, "Sort ?u.159"),
-        (`f₁, "?α → Nat"),
-        (`f₂, "?α → Nat"),
-        (`h, "?f₁ = ?f₂"),
-        (`a, "?α"),
-        (`conduit, "(?f₁ ?a = ?f₂ ?a) = (n + m + (n + m) = (n + m) * 2)"),
-      ])
-def test_congr : TestT Elab.TermElabM Unit := do
-  let expr := "λ (a b: Nat) => a = b"
-  let expr ← parseSentence expr
-  Meta.lambdaTelescope expr $ λ _ body => do
-    let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    let newGoals ← runTacticOnMVar Tactic.evalCongruence target.mvarId!
-    addTest $  LSpec.check "goals" ((← newGoals.mapM (λ x => mvarUserNameAndType x)) =
-      [
-        (`α, "Sort ?u.10"),
-        (`f₁, "?α → Nat"),
-        (`f₂, "?α → Nat"),
-        (`a₁, "?α"),
-        (`a₂, "?α"),
-        (`h₁, "?f₁ = ?f₂"),
-        (`h₂, "?a₁ = ?a₂"),
-        (`conduit, "(?f₁ ?a₁ = ?f₂ ?a₂) = (a = b)"),
-      ])
-
-def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
-  [
-    ("congrArg List.reverse", test_congr_arg_list),
-    ("congrArg", test_congr_arg),
-    ("congrFun", test_congr_fun),
-    ("congr", test_congr),
-  ] |>.map (λ (name, t) => (name, runTestTermElabM env t))
-
-end Pantograph.Test.Tactic.Congruence

Test/Tactic/MotivatedApply.lean

@@ -1,113 +0,0 @@
-import LSpec
-import Lean
-import Test.Common
-
-open Lean
-open Pantograph
-
-namespace Pantograph.Test.Tactic.MotivatedApply
-
-def test_type_extract : TestT Elab.TermElabM Unit := do
-  let recursor ← parseSentence "@Nat.brecOn"
-  let recursorType ← Meta.inferType recursor
-  addTest $ LSpec.check "recursorType" ("{motive : Nat → Sort ?u.1} → (t : Nat) → ((t : Nat) → Nat.below t → motive t) → motive t" =
-    (← exprToStr recursorType))
-  let info ← match Tactic.getRecursorInformation recursorType with
-    | .some info => pure info
-    | .none => throwError "Failed to extract recursor info"
-  addTest $ LSpec.check "iMotive" (info.iMotive = 2)
-  let motiveType := info.getMotiveType
-  addTest $ LSpec.check "motiveType" ("Nat → Sort ?u.1" =
-    (← exprToStr motiveType))
-
-def test_nat_brec_on : TestT Elab.TermElabM Unit := do
-  let expr := "λ (n t: Nat) => n + 0 = n"
-  let expr ← parseSentence expr
-  Meta.lambdaTelescope expr $ λ _ body => do
-    let recursor ← match Parser.runParserCategory
-      (env := ← MonadEnv.getEnv)
-      (catName := `term)
-      (input := "@Nat.brecOn")
-      (fileName := filename) with
-      | .ok syn => pure syn
-      | .error error => throwError "Failed to parse: {error}"
-    -- Apply the tactic
-    let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    let tactic := Tactic.evalMotivatedApply recursor
-    let newGoals ← runTacticOnMVar tactic target.mvarId!
-    let test :=  LSpec.check "goals" ((← newGoals.mapM (λ g => do exprToStr (← g.getType))) =
-      [
-        "Nat → Prop",
-        "Nat",
-        "∀ (t : Nat), Nat.below t → ?motive t",
-        "?motive ?m.67 = (n + 0 = n)",
-      ])
-    addTest test
-
-def test_list_brec_on : TestT Elab.TermElabM Unit := do
-  let expr := "λ {α : Type} (l: List α) => l ++ [] = [] ++ l"
-  let expr ← parseSentence expr
-  Meta.lambdaTelescope expr $ λ _ body => do
-    let recursor ← match Parser.runParserCategory
-      (env := ← MonadEnv.getEnv)
-      (catName := `term)
-      (input := "@List.brecOn")
-      (fileName := filename) with
-      | .ok syn => pure syn
-      | .error error => throwError "Failed to parse: {error}"
-    -- Apply the tactic
-    let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    let tactic := Tactic.evalMotivatedApply recursor
-    let newGoals ← runTacticOnMVar tactic target.mvarId!
-    addTest $ LSpec.check "goals" ((← newGoals.mapM (λ g => do exprToStr (← g.getType))) =
-      [
-        "Type ?u.90",
-        "List ?m.92 → Prop",
-        "List ?m.92",
-        "∀ (t : List ?m.92), List.below t → ?motive t",
-        "?motive ?m.94 = (l ++ [] = [] ++ l)",
-      ])
-
-def test_partial_motive_instantiation : TestT Elab.TermElabM Unit := do
-  let expr := "λ (n t: Nat) => n + 0 = n"
-  let recursor ← match Parser.runParserCategory
-    (env := ← MonadEnv.getEnv)
-    (catName := `term)
-    (input := "@Nat.brecOn")
-    (fileName := filename) with
-    | .ok syn => pure syn
-    | .error error => throwError "Failed to parse: {error}"
-  let expr ← parseSentence expr
-  Meta.lambdaTelescope expr $ λ _ body => do
-    -- Apply the tactic
-    let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    let tactic := Tactic.evalMotivatedApply recursor
-    let newGoals ← runTacticOnMVar tactic target.mvarId!
-    let majorId := 67
-    addTest $ (LSpec.check "goals" ((← newGoals.mapM (λ g => do exprToStr (← g.getType))) =
-      [
-        "Nat → Prop",
-        "Nat",
-        "∀ (t : Nat), Nat.below t → ?motive t",
-        s!"?motive ?m.{majorId} = (n + 0 = n)",
-      ]))
-    let [motive, major, step, conduit] := newGoals | panic! "Incorrect goal number"
-    addTest $ (LSpec.check "goal name" (major.name.toString = s!"_uniq.{majorId}"))
-
-    -- Assign motive to `λ x => x + _`
-    let motive_assign ← parseSentence "λ (x: Nat) => @Nat.add x + 0 = _"
-    motive.assign motive_assign
-
-    addTest $ ← conduit.withContext do
-      let t := toString (← Meta.ppExpr $ ← conduit.getType)
-      return LSpec.check "conduit" (t = s!"(?m.{majorId}.add + 0 = ?m.138 ?m.{majorId}) = (n + 0 = n)")
-
-def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
-  [
-    ("type_extract", test_type_extract),
-    ("Nat.brecOn", test_nat_brec_on),
-    ("List.brecOn", test_list_brec_on),
-    ("Nat.brecOn partial motive instantiation", test_partial_motive_instantiation),
-  ] |>.map (λ (name, t) => (name, runTestTermElabM env t))
-
-end Pantograph.Test.Tactic.MotivatedApply

Test/Tactic/NoConfuse.lean

@@ -1,72 +0,0 @@
-import LSpec
-import Lean
-import Test.Common
-
-open Lean
-open Pantograph
-
-namespace Pantograph.Test.Tactic.NoConfuse
-
-def test_nat : TestT Elab.TermElabM Unit := do
-  let expr := "λ (n: Nat) (h: 0 = n + 1) => False"
-  let expr ← parseSentence expr
-  Meta.lambdaTelescope expr $ λ _ body => do
-    let recursor ← match Parser.runParserCategory
-      (env := ← MonadEnv.getEnv)
-      (catName := `term)
-      (input := "h")
-      (fileName := filename) with
-      | .ok syn => pure syn
-      | .error error => throwError "Failed to parse: {error}"
-    -- Apply the tactic
-    let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    let tactic := Tactic.evalNoConfuse recursor
-    let newGoals ← runTacticOnMVar tactic target.mvarId!
-    addTest $ LSpec.check "goals" ((← newGoals.mapM (λ g => do exprToStr (← g.getType))) = [])
-
-def test_nat_fail : TestT Elab.TermElabM Unit := do
-  let expr := "λ (n: Nat) (h: n = n) => False"
-  let expr ← parseSentence expr
-  Meta.lambdaTelescope expr $ λ _ body => do
-    let recursor ← match Parser.runParserCategory
-      (env := ← MonadEnv.getEnv)
-      (catName := `term)
-      (input := "h")
-      (fileName := filename) with
-      | .ok syn => pure syn
-      | .error error => throwError "Failed to parse: {error}"
-    -- Apply the tactic
-    let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    try
-      let tactic := Tactic.evalNoConfuse recursor
-      let _ ← runTacticOnMVar tactic target.mvarId!
-      addTest $ assertUnreachable "Tactic should fail"
-    catch _ =>
-      addTest $ LSpec.check "Tactic should fail" true
-
-def test_list : TestT Elab.TermElabM Unit := do
-  let expr := "λ (l: List Nat) (h: [] = 1 :: l) => False"
-  let expr ← parseSentence expr
-  Meta.lambdaTelescope expr $ λ _ body => do
-    let recursor ← match Parser.runParserCategory
-      (env := ← MonadEnv.getEnv)
-      (catName := `term)
-      (input := "h")
-      (fileName := filename) with
-      | .ok syn => pure syn
-      | .error error => throwError "Failed to parse: {error}"
-    -- Apply the tactic
-    let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    let tactic := Tactic.evalNoConfuse recursor
-    let newGoals ← runTacticOnMVar tactic target.mvarId!
-    addTest $ LSpec.check "goals"
-      ((← newGoals.mapM (λ g => do exprToStr (← g.getType))) = [])
-
-def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
-  [
-    ("Nat", test_nat),
-    ("Nat fail", test_nat_fail),
-    ("List", test_list),
-  ] |>.map (λ (name, t) => (name, runTestTermElabM env t))
-
-end Pantograph.Test.Tactic.NoConfuse

Test/Tactic/Prograde.lean

@@ -1,300 +0,0 @@
-import LSpec
-import Lean
-import Test.Common
-
-open Lean
-open Pantograph
-
-namespace Pantograph.Test.Tactic.Prograde
-
-def test_define : TestT Elab.TermElabM Unit := do
-  let expr := "forall (p q : Prop) (h: p), And (Or p q) (Or p q)"
-  let expr ← parseSentence expr
-  Meta.forallTelescope expr $ λ _ body => do
-    let e ← match Parser.runParserCategory
-      (env := ← MonadEnv.getEnv)
-      (catName := `term)
-      (input := "Or.inl h")
-      (fileName := filename) with
-      | .ok syn => pure syn
-      | .error error => throwError "Failed to parse: {error}"
-    -- Apply the tactic
-    let goal ← Meta.mkFreshExprSyntheticOpaqueMVar body
-    let target: Expr := mkAnd
-      (mkOr (.fvar ⟨uniq 8⟩) (.fvar ⟨uniq 9⟩))
-      (mkOr (.fvar ⟨uniq 8⟩) (.fvar ⟨uniq 9⟩))
-    let h := .fvar ⟨uniq 8⟩
-    addTest $ LSpec.test "goals before" ((← toCondensedGoal goal.mvarId!).devolatilize == {
-      context := #[
-        cdeclOf `p (.sort 0),
-        cdeclOf `q (.sort 0),
-        cdeclOf `h h
-      ],
-      target,
-    })
-    let tactic := Tactic.evalDefine `h2 e
-    let m := .mvar ⟨uniq 13⟩
-    let [newGoal] ← runTacticOnMVar tactic goal.mvarId! | panic! "Incorrect goal number"
-    addTest $ LSpec.test "goals after" ((← toCondensedGoal newGoal).devolatilize == {
-      context := #[
-        cdeclOf `p (.sort 0),
-        cdeclOf `q (.sort 0),
-        cdeclOf `h h,
-        {
-          userName := `h2,
-          type := mkOr h m,
-          value? := .some $ mkApp3 (mkConst `Or.inl) h m (.fvar ⟨uniq 10⟩)
-        }
-      ],
-      target,
-    })
-    let .some e ← getExprMVarAssignment? goal.mvarId! | panic! "Tactic must assign"
-    addTest $ LSpec.test "assign" e.isLet
-
-def test_define_proof : TestT Elab.TermElabM Unit := do
-  let rootExpr ← parseSentence "∀ (p q: Prop), p → ((p ∨ q) ∨ (p ∨ q))"
-  let state0 ← GoalState.create rootExpr
-  let tactic := "intro p q h"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state1.serializeGoals).map (·.devolatilize) =
-    #[buildGoal [("p", "Prop"), ("q", "Prop"), ("h", "p")] "(p ∨ q) ∨ p ∨ q"])
-
-  let expr := "Or.inl (Or.inl h)"
-  let state2 ← match ← state1.tryAssign (state1.get! 0) (expr := expr) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!":= {expr}" ((← state2.serializeGoals).map (·.devolatilize) =
-    #[])
-
-  let evalBind := "y"
-  let evalExpr := "Or.inl h"
-  let state2 ← match ← state1.tryDefine (state1.get! 0) (binderName := evalBind) (expr := evalExpr) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"eval {evalBind} := {evalExpr}" ((← state2.serializeGoals).map (·.devolatilize) =
-    #[{
-      target := { pp? := .some  "(p ∨ q) ∨ p ∨ q"},
-      vars := #[
-        { userName := "p", type? := .some { pp? := .some "Prop" } },
-        { userName := "q", type? := .some { pp? := .some "Prop" } },
-        { userName := "h", type? := .some { pp? := .some "p" } },
-        { userName := "y",
-          type? := .some { pp? := .some "p ∨ ?m.25" },
-          value? := .some { pp? := .some "Or.inl h" },
-        }
-      ]
-  }])
-
-  let expr := "Or.inl y"
-  let state3 ← match ← state2.tryAssign (state2.get! 0) (expr := expr) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!":= {expr}" ((← state3.serializeGoals).map (·.devolatilize) =
-    #[])
-
-  addTest $ LSpec.check "(3 root)" state3.rootExpr?.isSome
-
-def fun_define_root_expr: ∀ (p: Prop), PProd (Nat → p) Unit → p := by
-  intro p x
-  apply x.fst
-  exact 5
-
-def test_define_root_expr : TestT Elab.TermElabM Unit := do
-  --let rootExpr ← parseSentence "Nat"
-  --let state0 ← GoalState.create rootExpr
-  --let .success state1 ← state0.tacticOn (goalId := 0) "exact 5" | addTest $ assertUnreachable "exact 5"
-  --let .some rootExpr := state1.rootExpr? | addTest $ assertUnreachable "Root expr"
-  --addTest $ LSpec.check "root" ((toString $ ← Meta.ppExpr rootExpr) = "5")
-  let rootExpr ← parseSentence "∀ (p: Prop), PProd (Nat → p) Unit → p"
-  let state0 ← GoalState.create rootExpr
-  let tactic := "intro p x"
-  let .success state1 ← state0.tacticOn (goalId := 0) tactic | addTest $ assertUnreachable tactic
-  let binderName := `binder
-  let value := "x.fst"
-  let expr ← state1.goals[0]!.withContext $ strToTermSyntax value
-  let tacticM := Tactic.evalDefine binderName expr
-  let .success state2 ← state1.tryTacticM (state1.get! 0) tacticM | addTest $ assertUnreachable s!"define {binderName} := {value}"
-  let tactic := s!"apply {binderName}"
-  let .success state3 ← state2.tacticOn (goalId := 0) tactic | addTest $ assertUnreachable tactic
-  let tactic := s!"exact 5"
-  let .success state4 ← state3.tacticOn (goalId := 0) tactic | addTest $ assertUnreachable tactic
-  let .some rootExpr := state4.rootExpr? | addTest $ assertUnreachable "Root expr"
-  addTest $ LSpec.check "root" ((toString $ ← Meta.ppExpr rootExpr) = "fun p x =>\n  let binder := x.fst;\n  binder 5")
-
---set_option pp.all true
---#check @PSigma (α := Prop) (β := λ (p: Prop) => p)
---def test_define_root_expr : TestT Elab.TermElabM Unit := do
-
-def test_have_proof : TestT Elab.TermElabM Unit := do
-  let rootExpr ← parseSentence "∀ (p q: Prop), p → ((p ∨ q) ∨ (p ∨ q))"
-  let state0 ← GoalState.create rootExpr
-  let tactic := "intro p q h"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state1.serializeGoals).map (·.devolatilize) =
-    #[buildGoal [("p", "Prop"), ("q", "Prop"), ("h", "p")] "(p ∨ q) ∨ p ∨ q"])
-
-  let expr := "Or.inl (Or.inl h)"
-  let state2 ← match ← state1.tryAssign (state1.get! 0) (expr := expr) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!":= {expr}" ((← state2.serializeGoals).map (·.devolatilize) =
-    #[])
-
-  let haveBind := "y"
-  let haveType := "p ∨ q"
-  let state2 ← match ← state1.tryHave (state1.get! 0) (binderName := haveBind) (type := haveType) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!"have {haveBind}: {haveType}" ((← state2.serializeGoals).map (·.devolatilize) =
-    #[
-      buildGoal [("p", "Prop"), ("q", "Prop"), ("h", "p")] "p ∨ q",
-      buildGoal [("p", "Prop"), ("q", "Prop"), ("h", "p"), ("y", "p ∨ q")] "(p ∨ q) ∨ p ∨ q"
-    ])
-
-  let expr := "Or.inl h"
-  let state3 ← match ← state2.tryAssign (state2.get! 0) (expr := expr) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!":= {expr}" ((← state3.serializeGoals).map (·.devolatilize) =
-    #[])
-
-  let state2b ← match state3.continue state2 with
-    | .ok state => pure state
-    | .error e => do
-      addTest $ assertUnreachable e
-      return ()
-  let expr := "Or.inl y"
-  let state4 ← match ← state2b.tryAssign (state2b.get! 0) (expr := expr) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check s!":= {expr}" ((← state4.serializeGoals).map (·.devolatilize) =
-    #[])
-
-  let .some rootExpr := state4.rootExpr? | addTest $ assertUnreachable "Root expr"
-  addTest $ LSpec.check "root" ((toString $ ← Meta.ppExpr rootExpr) = "fun p q h y => Or.inl y")
-
-def test_let (specialized: Bool): TestT Elab.TermElabM Unit := do
-  let rootExpr ← parseSentence "∀ (p q: Prop), p → ((p ∨ q) ∨ (p ∨ q))"
-  let state0 ← GoalState.create rootExpr
-  let tactic := "intro a p h"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state1.serializeGoals).map (·.devolatilize) =
-    #[{
-      target := { pp? := .some mainTarget },
-      vars := interiorVars,
-    }])
-
-  let letType := "Nat"
-  let expr := s!"let b: {letType} := _; _"
-  let result2 ← match specialized with
-    | true => state1.tryLet (state1.get! 0) (binderName := "b") (type := letType)
-    | false => state1.tryAssign (state1.get! 0) (expr := expr)
-  let state2 ← match result2 with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  let serializedState2 ← state2.serializeGoals
-  let letBindName := if specialized then "b" else "_1"
-  addTest $ LSpec.check expr (serializedState2.map (·.devolatilize) =
-    #[{
-      target := { pp? := .some letType },
-      vars := interiorVars,
-      userName? := .some letBindName
-    },
-    {
-      target := { pp? := .some mainTarget },
-      vars := interiorVars ++ #[{
-        userName := "b",
-        type? := .some { pp? := .some letType },
-        value? := .some { pp? := .some s!"?{letBindName}" },
-      }],
-      userName? := if specialized then .none else .some "_2",
-    }
-    ])
-
-  let tactic := "exact 1"
-  let state3 ← match ← state2.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.check tactic ((← state3.serializeGoals).map (·.devolatilize) = #[])
-
-  let state3r ← match state3.continue state2 with
-    | .error msg => do
-      addTest $ assertUnreachable $ msg
-      return ()
-    | .ok state => pure state
-  addTest $ LSpec.check "(continue)" ((← state3r.serializeGoals).map (·.devolatilize) =
-    #[
-    {
-      target := { pp? := .some mainTarget },
-      vars := interiorVars ++ #[{
-        userName := "b",
-        type? := .some { pp? := .some "Nat" },
-        value? := .some { pp? := .some "1" },
-      }],
-      userName? := if specialized then .none else .some "_2",
-    }
-    ])
-
-  let tactic := "exact h"
-  match ← state3r.tacticOn (goalId := 0) (tactic := tactic) with
-  | .failure #[message] =>
-    addTest $ LSpec.check tactic  (message = s!"type mismatch\n  h\nhas type\n  a : Prop\nbut is expected to have type\n  {mainTarget} : Prop")
-  | other => do
-    addTest $ assertUnreachable $ other.toString
-
-  let tactic := "exact Or.inl (Or.inl h)"
-  let state4 ← match ← state3r.tacticOn (goalId := 0) (tactic := tactic) with
-    | .success state => pure state
-    | other => do
-      addTest $ assertUnreachable $ other.toString
-      return ()
-  addTest $ LSpec.test "(4 root)" state4.rootExpr?.isSome
-  where
-    mainTarget := "(a ∨ p) ∨ a ∨ p"
-    interiorVars: Array Protocol.Variable := #[
-        { userName := "a", type? := .some { pp? := .some "Prop" }, },
-        { userName := "p", type? := .some { pp? := .some "Prop" }, },
-        { userName := "h", type? := .some { pp? := .some "a" }, }
-      ]
-
-def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
-  [
-    ("define", test_define),
-    ("define proof", test_define_proof),
-    ("define root expr", test_define_root_expr),
-    ("have proof", test_have_proof),
-    ("let via assign", test_let false),
-    ("let via tryLet", test_let true),
-  ] |>.map (λ (name, t) => (name, runTestTermElabM env t))
-
-end Pantograph.Test.Tactic.Prograde

Test/all.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+lake build test && lake env build/bin/test

flake.lock

@@ -1,169 +0,0 @@
-{
-  "nodes": {
-    "flake-parts": {
-      "inputs": {
-        "nixpkgs-lib": "nixpkgs-lib"
-      },
-      "locked": {
-        "lastModified": 1709336216,
-        "narHash": "sha256-Dt/wOWeW6Sqm11Yh+2+t0dfEWxoMxGBvv3JpIocFl9E=",
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "rev": "f7b3c975cf067e56e7cda6cb098ebe3fb4d74ca2",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "type": "github"
-      }
-    },
-    "flake-utils": {
-      "locked": {
-        "lastModified": 1656928814,
-        "narHash": "sha256-RIFfgBuKz6Hp89yRr7+NR5tzIAbn52h8vT6vXkYjZoM=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "7e2a3b3dfd9af950a856d66b0a7d01e3c18aa249",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "lean": {
-      "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs",
-        "nixpkgs-cadical": "nixpkgs-cadical",
-        "nixpkgs-old": "nixpkgs-old"
-      },
-      "locked": {
-        "lastModified": 1727749878,
-        "narHash": "sha256-O2Egyh2D0TfQWzQKfHUeAh7qAjMfeLVwXwGUw5QqcvE=",
-        "owner": "leanprover",
-        "repo": "lean4",
-        "rev": "dc2533473114eb8656439ff2b9335209784aa640",
-        "type": "github"
-      },
-      "original": {
-        "owner": "leanprover",
-        "ref": "v4.12.0",
-        "repo": "lean4",
-        "type": "github"
-      }
-    },
-    "lspec": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1728279187,
-        "narHash": "sha256-ZMqbvCqR/gHXRuIkuo7b0Yp9N1vOQR7xnrcy/SeIBoQ=",
-        "owner": "argumentcomputer",
-        "repo": "LSpec",
-        "rev": "504a8cecf8da601b9466ac727aebb6b511aae4ab",
-        "type": "github"
-      },
-      "original": {
-        "owner": "argumentcomputer",
-        "ref": "504a8cecf8da601b9466ac727aebb6b511aae4ab",
-        "repo": "LSpec",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1686089707,
-        "narHash": "sha256-LTNlJcru2qJ0XhlhG9Acp5KyjB774Pza3tRH0pKIb3o=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "af21c31b2a1ec5d361ed8050edd0303c31306397",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs-cadical": {
-      "locked": {
-        "lastModified": 1722221733,
-        "narHash": "sha256-sga9SrrPb+pQJxG1ttJfMPheZvDOxApFfwXCFO0H9xw=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "12bf09802d77264e441f48e25459c10c93eada2e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "12bf09802d77264e441f48e25459c10c93eada2e",
-        "type": "github"
-      }
-    },
-    "nixpkgs-lib": {
-      "locked": {
-        "dir": "lib",
-        "lastModified": 1709237383,
-        "narHash": "sha256-cy6ArO4k5qTx+l5o+0mL9f5fa86tYUX3ozE1S+Txlds=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "1536926ef5621b09bba54035ae2bb6d806d72ac8",
-        "type": "github"
-      },
-      "original": {
-        "dir": "lib",
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs-old": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1581379743,
-        "narHash": "sha256-i1XCn9rKuLjvCdu2UeXKzGLF6IuQePQKFt4hEKRU5oc=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "34c7eb7545d155cc5b6f499b23a7cb1c96ab4d59",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-19.03",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1711703276,
-        "narHash": "sha256-iMUFArF0WCatKK6RzfUJknjem0H9m4KgorO/p3Dopkk=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "d8fe5e6c92d0d190646fb9f1056741a229980089",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "flake-parts": "flake-parts",
-        "lean": "lean",
-        "lspec": "lspec",
-        "nixpkgs": "nixpkgs_2"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}

flake.nix

@@ -1,96 +0,0 @@
-{
-  description = "Pantograph";
-
-  inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-    flake-parts.url = "github:hercules-ci/flake-parts";
-    lean = {
-      # Do not follow input's nixpkgs since it could cause build failures
-      url = "github:leanprover/lean4?ref=v4.12.0";
-    };
-    lspec = {
-      url = "github:argumentcomputer/LSpec?ref=504a8cecf8da601b9466ac727aebb6b511aae4ab";
-      flake = false;
-    };
-  };
-
-  outputs = inputs @ {
-    self,
-    nixpkgs,
-    flake-parts,
-    lean,
-    lspec,
-    ...
-  } : flake-parts.lib.mkFlake { inherit inputs; } {
-    flake = {
-    };
-    systems = [
-      "x86_64-linux"
-      "x86_64-darwin"
-    ];
-    perSystem = { system, pkgs, ... }: let
-      leanPkgs = lean.packages.${system}.deprecated;
-      lspecLib = leanPkgs.buildLeanPackage {
-        name = "LSpec";
-        roots = [ "Main" "LSpec" ];
-        src = "${lspec}";
-      };
-      project = leanPkgs.buildLeanPackage {
-        name = "Pantograph";
-        roots = [ "Pantograph" ];
-        src = pkgs.lib.cleanSource (pkgs.lib.cleanSourceWith {
-          src = ./.;
-          filter = path: type:
-            !(pkgs.lib.hasInfix "/Test/" path) &&
-            !(pkgs.lib.hasSuffix ".md" path) &&
-            !(pkgs.lib.hasSuffix "Repl.lean" path);
-        });
-      };
-      repl = leanPkgs.buildLeanPackage {
-        name = "Repl";
-        roots = [ "Main" "Repl" ];
-        deps = [ project ];
-        src = pkgs.lib.cleanSource (pkgs.lib.cleanSourceWith {
-          src = ./.;
-          filter = path: type:
-            !(pkgs.lib.hasInfix "/Test/" path) &&
-            !(pkgs.lib.hasSuffix ".md" path);
-        });
-      };
-      test = leanPkgs.buildLeanPackage {
-        name = "Test";
-        # NOTE: The src directory must be ./. since that is where the import
-        # root begins (e.g. `import Test.Environment` and not `import
-        # Environment`) and thats where `lakefile.lean` resides.
-        roots = [ "Test.Main" ];
-        deps = [ lspecLib repl ];
-        src = pkgs.lib.cleanSource (pkgs.lib.cleanSourceWith {
-          src = ./.;
-          filter = path: type:
-            !(pkgs.lib.hasInfix "Pantograph" path);
-        });
-      };
-    in rec {
-      packages = {
-        inherit (leanPkgs) lean lean-all;
-        inherit (project) sharedLib;
-        inherit (repl) executable;
-        default = repl.executable;
-      };
-      legacyPackages = {
-        inherit project leanPkgs;
-      };
-      checks = {
-        test = pkgs.runCommand "test" {
-          buildInputs = [ test.executable leanPkgs.lean-all ];
-        } ''
-          #export LEAN_SRC_PATH="${./.}"
-          ${test.executable}/bin/test > $out
-        '';
-      };
-      devShells.default = pkgs.mkShell {
-        buildInputs = [ leanPkgs.lean-all leanPkgs.lean ];
-      };
-    };
-  };
-}

lake-manifest.json

@@ -1,15 +1,11 @@
-{"version": "1.1.0",
- "packagesDir": ".lake/packages",
+{"version": 5,
+ "packagesDir": "lake-packages",
  "packages":
- [{"url": "https://github.com/lenianiva/LSpec.git",
-   "type": "git",
-   "subDir": null,
-   "scope": "",
-   "rev": "c492cecd0bc473e2f9c8b94d545d02cc0056034f",
-   "name": "LSpec",
-   "manifestFile": "lake-manifest.json",
-   "inputRev": "c492cecd0bc473e2f9c8b94d545d02cc0056034f",
-   "inherited": false,
-   "configFile": "lakefile.lean"}],
- "name": "pantograph",
- "lakeDir": ".lake"}
+ [{"git":
+   {"url": "https://github.com/lurk-lab/LSpec.git",
+    "subDir?": null,
+    "rev": "88f7d23e56a061d32c7173cea5befa4b2c248b41",
+    "opts": {},
+    "name": "LSpec",
+    "inputRev?": "88f7d23e56a061d32c7173cea5befa4b2c248b41",
+    "inherited": false}}]}

lakefile.lean

@@ -4,26 +4,21 @@ open Lake DSL
 package pantograph
 
 lean_lib Pantograph {
-  roots := #[`Pantograph]
-  defaultFacets := #[LeanLib.sharedFacet]
 }
 
-lean_lib Repl {
-}
 @[default_target]
-lean_exe repl {
+lean_exe pantograph {
   root := `Main
-  -- Solves the native symbol not found problem
+  -- Somehow solves the native symbol not found problem
   supportInterpreter := true
 }
 
 require LSpec from git
-  "https://github.com/lenianiva/LSpec.git" @ "c492cecd0bc473e2f9c8b94d545d02cc0056034f"
+  "https://github.com/lurk-lab/LSpec.git" @ "88f7d23e56a061d32c7173cea5befa4b2c248b41"
 lean_lib Test {
 }
-@[test_driver]
 lean_exe test {
   root := `Test.Main
-  -- Solves the native symbol not found problem
+  -- Somehow solves the native symbol not found problem
   supportInterpreter := true
 }

lean-toolchain

@@ -1 +1 @@
-leanprover/lean4:v4.12.0
+leanprover/lean4:4.0.0