LICENSE

@@ -1,190 +0,0 @@
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Main.lean

@@ -1,15 +1,15 @@
 import Lean.Data.Json
 import Lean.Environment
 
+import Pantograph.Version
+import Pantograph.Library
 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 parseCommand (s: String): Except String Protocol.Command := do
   let s := s.trim
   match s.get? 0 with
   | .some '{' => -- Parse in Json mode
@@ -29,20 +29,15 @@ partial def loop : MainM Unit := do
   if command.trim.length = 0 then return ()
   match parseCommand command with
   | .error error =>
-    let error  := Lean.toJson ({ error := "command", desc := error }: InteractionError)
+    let error  := Lean.toJson ({ error := "command", desc := error }: Protocol.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
 
 
@@ -50,15 +45,15 @@ 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 ""
+  initSearch ""
 
   let coreContext ← args.filterMap (λ s => if s.startsWith "--" then .some <| s.drop 2 else .none)
-    |>.toArray |> Pantograph.createCoreContext
+    |>.toArray |> createCoreContext
   let imports:= args.filter (λ s => ¬ (s.startsWith "--"))
-  let coreState ← Pantograph.createCoreState imports.toArray
+  let coreState ← createCoreState imports.toArray
   let context: Context := {
     imports
   }
@@ -67,6 +62,5 @@ unsafe def main (args: List String): IO Unit := do
     IO.println "ready."
     discard <| coreM.toIO coreContext coreState
   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

Makefile

@@ -0,0 +1,20 @@
+LIB := ./.lake/build/lib/Pantograph.olean
+EXE := ./.lake/build/bin/pantograph
+SOURCE := $(wildcard Pantograph/*.lean) $(wildcard *.lean) lean-toolchain
+
+TEST_EXE := ./.lake/build/bin/test
+TEST_SOURCE := $(wildcard Test/*.lean)
+
+$(LIB) $(EXE): $(SOURCE)
+	lake build pantograph
+
+$(TEST_EXE): $(LIB) $(TEST_SOURCE)
+	lake build test
+
+test: $(TEST_EXE)
+	$(TEST_EXE)
+
+clean:
+	lake clean
+
+.PHONY: test clean

Pantograph.lean

@@ -1,9 +1,194 @@
-import Pantograph.Delate
-import Pantograph.Elab
-import Pantograph.Environment
-import Pantograph.Frontend
 import Pantograph.Goal
-import Pantograph.Library
 import Pantograph.Protocol
 import Pantograph.Serial
-import Pantograph.Version
+import Pantograph.Environment
+import Pantograph.Library
+import Lean.Data.HashMap
+
+namespace Pantograph
+
+structure Context where
+  imports: List String
+
+/-- Stores state of the REPL -/
+structure State where
+  options: Protocol.Options := {}
+  nextId: Nat := 0
+  goalStates: Lean.HashMap Nat GoalState := Lean.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 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
+  | cmd =>
+    let error: Protocol.InteractionError :=
+      errorCommand s!"Unknown command {cmd}"
+    return Lean.toJson error
+  where
+  errorCommand := errorI "command"
+  errorIndex := errorI "index"
+  -- Command Functions
+  reset (_: Protocol.Reset): MainM (CR Protocol.StatResult) := do
+    let state ← get
+    let nGoals := state.goalStates.size
+    set { state with nextId := 0, goalStates := Lean.HashMap.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
+      }
+    }
+    return .ok {  }
+  options_print (_: Protocol.OptionsPrint): MainM (CR Protocol.OptionsPrintResult) := do
+    return .ok (← get).options
+  goal_start (args: Protocol.GoalStart): MainM (CR Protocol.GoalStartResult) := do
+    let state ← get
+    let env ← Lean.MonadEnv.getEnv
+    let expr?: Except _ GoalState ← runTermElabM (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 := state.nextId
+      set { state with
+        goalStates := state.goalStates.insert stateId goalState,
+        nextId := state.nextId + 1
+      }
+      return .ok { stateId, root := goalState.root.name.toString }
+  goal_tactic (args: Protocol.GoalTactic): MainM (CR Protocol.GoalTacticResult) := do
+    let state ← get
+    match state.goalStates.find? args.stateId with
+    | .none => return .error $ errorIndex s!"Invalid state index {args.stateId}"
+    | .some goalState => do
+      let nextGoalState?: Except _ GoalState ←
+        match args.tactic?, args.expr?, args.have?, args.calc?, args.conv?  with
+        | .some tactic, .none, .none, .none, .none => do
+          pure ( Except.ok (← goalTactic goalState args.goalId tactic))
+        | .none, .some expr, .none, .none, .none => do
+          pure ( Except.ok (← goalAssign goalState args.goalId expr))
+        | .none, .none, .some type, .none, .none => do
+          let binderName := args.binderName?.getD ""
+          pure ( Except.ok (← goalHave goalState args.goalId binderName type))
+        | .none, .none, .none, .some pred, .none => do
+          pure ( Except.ok (← goalCalc goalState args.goalId pred))
+        | .none, .none, .none, .none, .some true => do
+          pure ( Except.ok (← goalConv goalState args.goalId))
+        | .none, .none, .none, .none, .some false => do
+          pure ( Except.ok (← goalConvExit goalState))
+        | _, _, _, _, _ => pure (Except.error <|
+          errorI "arguments" "Exactly one of {tactic, expr, have, calc, conv} must be supplied")
+      match nextGoalState? with
+      | .error error => return .error error
+      | .ok (.success nextGoalState) =>
+        let nextStateId := state.nextId
+        set { state with
+          goalStates := state.goalStates.insert state.nextId nextGoalState,
+          nextId := state.nextId + 1,
+        }
+        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 (.indexError goalId) =>
+        return .error $ errorIndex s!"Invalid goal id index {goalId}"
+      | .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
+    match state.goalStates.find? args.target with
+    | .none => return .error $ errorIndex s!"Invalid state index {args.target}"
+    | .some target => do
+      let nextState? ← match args.branch?, args.goals? with
+        | .some branchId, .none => do
+          match state.goalStates.find? branchId with
+          | .none => return .error $ errorIndex s!"Invalid state index {branchId}"
+          | .some branch => pure $ goalContinue target 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
+    match state.goalStates.find? args.stateId with
+    | .none => return .error $ errorIndex s!"Invalid state index {args.stateId}"
+    | .some goalState => runMetaM <| do
+      return .ok (← goalPrint goalState state.options)
+
+end Pantograph

Pantograph/Delate.lean

@@ -1,562 +0,0 @@
-/-
-This file handles "Delation": The conversion of Kernel view into Search view.
--/
-import Lean
-import Std.Data.HashMap
-import Pantograph.Goal
-import Pantograph.Protocol
-
-open Lean
-
--- Symbol processing functions --
-
-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,
-  }
-
--- Condensed representation
-
-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
-
-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)
-
-def typeExprToBound (expr: Expr): MetaM Protocol.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
-
-/-- serialize a sort level. Expression is optimized to be compact e.g. `(+ u 2)` -/
-partial def serializeSortLevel (level: Level) (sanitize: Bool): 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
-      s!"(:max {v} {w})"
-    | .imax v w =>
-      let v := serializeSortLevel v sanitize
-      let w := serializeSortLevel w sanitize
-      s!"(:imax {v} {w})"
-    | .param name =>
-      let name := serializeName name sanitize
-      s!"{name}"
-    | .mvar id =>
-      let name := serializeName id.name sanitize
-      s!"(:mv {name})"
-  match k, u with
-  | 0, _ => u_str
-  | _, .zero => s!"{k}"
-  | _, _ => s!"(+ {u_str} {k})"
-
-
-/--
- 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
-  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
-    | .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
-  return {
-    pp?,
-    sexp?
-    dependentMVars?,
-  }
-
-
-/-- Adapted from ppGoal -/
-def serializeGoal (options: @&Protocol.Options) (goal: MVarId) (mvarDecl: MetavarDecl) (parentDecl?: Option MetavarDecl := .none)
-      : MetaM Protocol.Goal := do
-  -- Options for printing; See Meta.ppGoal for details
-  let showLetValues  := true
-  let ppAuxDecls     := options.printAuxDecls
-  let ppImplDetailHyps := options.printImplementationDetailHyps
-  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
-      match localDecl with
-      | .cdecl _ fvarId userName _ _ _ =>
-        return {
-          name := ofName fvarId.name,
-          userName:= ofName userName.simpMacroScopes,
-          isInaccessible := userName.isInaccessibleUserName
-        }
-      | .ldecl _ fvarId userName _ _ _ _ => do
-        return {
-          name := ofName fvarId.name,
-          userName := toString userName.simpMacroScopes,
-          isInaccessible := userName.isInaccessibleUserName
-        }
-    let ppVar (localDecl : LocalDecl) : MetaM Protocol.Variable := do
-      match localDecl with
-      | .cdecl _ fvarId userName type _ _ =>
-        let userName := userName.simpMacroScopes
-        let type ← instantiate type
-        return {
-          name := ofName fvarId.name,
-          userName:= ofName userName,
-          isInaccessible := userName.isInaccessibleUserName
-          type? := .some (← serializeExpression options type)
-        }
-      | .ldecl _ fvarId userName type val _ _ => do
-        let userName := userName.simpMacroScopes
-        let type ← instantiate type
-        let value? ← if showLetValues then
-          let val ← instantiate val
-          pure $ .some (← serializeExpression options val)
-        else
-          pure $ .none
-        return {
-          name := ofName fvarId.name,
-          userName:= ofName userName,
-          isInaccessible := userName.isInaccessibleUserName
-          type? := .some (← serializeExpression options type)
-          value? := 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 nameOnly := options.noRepeat && (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)),
-      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/Elab.lean

@@ -1,40 +0,0 @@
-import Lean
-open Lean
-
-namespace Pantograph
-
--- Functions for creating contexts and states
-@[export pantograph_default_elab_context]
-def defaultElabContext: Elab.Term.Context := {
-    errToSorry := false
-  }
-
-/-- Read syntax object from string -/
-def parseTerm (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
-  try
-    let expr ← Elab.Term.elabType syn
-    return .ok expr
-  catch ex => return .error (← ex.toMessageData.toString)
-def elabTerm (syn: Syntax) (expectedType? : Option Expr := .none): Elab.TermElabM (Except String Expr) := do
-  try
-    let expr ← Elab.Term.elabTerm (stx := syn) expectedType?
-    return .ok expr
-  catch ex => return .error (← ex.toMessageData.toString)
-
-
-end Pantograph

Pantograph/Environment.lean

@@ -1,33 +1,21 @@
-import Pantograph.Delate
-import Pantograph.Elab
 import Pantograph.Protocol
 import Pantograph.Serial
-import Lean.Environment
-import Lean.Replay
+import Lean
 
 open Lean
 open Pantograph
 
 namespace Pantograph.Environment
 
-@[export pantograph_is_name_internal]
-def isNameInternal (n: Name): Bool :=
+def isNameInternal (n: Lean.Name): Bool :=
   -- Returns true if the name is an implementation detail which should not be shown to the user.
-  n.isAuxLemma ∨ n.hasMacroScopes
+  isLeanSymbol n ∨ (Lean.privateToUserName? n |>.map isLeanSymbol |>.getD false) ∨ n.isAuxLemma ∨ n.hasMacroScopes
+  where
+  isLeanSymbol (name: Lean.Name): Bool := match name.getRoot with
+    | .str _ name => name == "Lean"
+    | _ => true
 
-/-- 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 :=
+def toCompactSymbolName (n: Lean.Name) (info: Lean.ConstantInfo): String :=
   let pref := match info with
   | .axiomInfo  _ => "a"
   | .defnInfo   _ => "d"
@@ -64,22 +52,21 @@ def inspect (args: Protocol.EnvInspect) (options: @&Protocol.Options): CoreM (Pr
     | .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',
+    type := ← (serializeExpression options info.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) )
+      then .some <| info.type.getUsedConstants.map (λ n => serializeName n)
       else .none,
+    valueDependency? := ← if args.dependency?.getD false
+      then info.value?.mapM (λ e => do
+        let e ← unfoldAuxLemmas e
+        pure $ e.getUsedConstants.filter (!isNameInternal ·) |>.map (λ n => serializeName n) )
+      else pure (.none),
     module? := module?
   }
   let result ← match info with
@@ -144,7 +131,7 @@ def addDecl (args: Protocol.EnvAdd): CoreM (Protocol.CR Protocol.EnvAddResult) :
     (hints := Lean.mkReducibilityHintsRegularEx 1)
     (safety := Lean.DefinitionSafety.safe)
     (all := [])
-  let env' ← match env.addDecl (← getOptions) constant with
+  let env' ← match env.addDecl constant with
     | .error e => do
       let options ← Lean.MonadOptions.getOptions
       let desc ← (e.toMessageData options).toString

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

@@ -3,9 +3,14 @@ Functions for handling metavariables
 
 All the functions starting with `try` resume their inner monadic state.
 -/
-import Pantograph.Tactic
+import Pantograph.Protocol
 import Lean
 
+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
@@ -20,176 +25,78 @@ structure GoalState where
 
   -- The root hole which is the search target
   root: MVarId
+  -- New metavariables acquired in this state
+  newMVars: SSet 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
+  convMVar?: Option (MVarId × 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
+  calcPrevRhs?: Option 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 goal ← 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' {}
+  let root := goal.mvarId!
+  let savedState ← savedStateMonad { elaborator := .anonymous } |>.run' { goals := [root]}
   return {
     root,
     savedState,
+    newMVars := SSet.insert .empty root,
     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 :=
+private 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,
-  }
+private def newMVarSet (mctxOld: @&MetavarContext) (mctxNew: @&MetavarContext): SSet MVarId :=
+  mctxNew.decls.foldl (fun acc mvarId mvarDecl =>
+    if let .some prevMVarDecl := mctxOld.decls.find? mvarId then
+      assert! prevMVarDecl.type == mvarDecl.type
+      acc
+    else
+      acc.insert mvarId
+    ) SSet.empty
 
-/-- 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,
-  }
+/-- Inner function for executing tactic on goal state -/
+def executeTactic (state: Elab.Tactic.SavedState) (goal: MVarId) (tactic: Syntax) :
+    Elab.TermElabM (Except (Array String) Elab.Tactic.SavedState):= do
+  let tacticM (stx: Syntax):  Elab.Tactic.TacticM (Except (Array String) Elab.Tactic.SavedState) := 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 (·.data)).mapM fun md => md.toString
+        return .error errors
+      else
+        return .ok (← MonadBacktrack.saveState)
+    catch exception =>
+      return .error #[← exception.toMessageData.toString]
+  tacticM tactic { elaborator := .anonymous } |>.run' state.tactic
 
 /-- Response for executing a tactic -/
 inductive TacticResult where
@@ -199,22 +106,19 @@ inductive TacticResult where
   | failure (messages: Array String)
   -- Could not parse tactic
   | parseError (message: String)
+  -- The goal index is out of bounds
+  | indexError (goalId: Nat)
   -- 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):
+/-- Execute tactic on given state -/
+protected def GoalState.tryTactic (state: GoalState) (goalId: Nat) (tactic: String):
     Elab.TermElabM TacticResult := do
   state.restoreElabM
+  let goal ← match state.savedState.tactic.goals.get? goalId with
+    | .some goal => pure $ goal
+    | .none => return .indexError goalId
+  goal.checkNotAssigned `GoalState.tryTactic
   let tactic ← match Parser.runParserCategory
     (env := ← MonadEnv.getEnv)
     (catName := if state.isConv then `conv else `tactic)
@@ -222,68 +126,213 @@ protected def GoalState.tryTactic (state: GoalState) (goal: MVarId) (tactic: Str
     (fileName := filename) with
     | .ok stx => pure $ stx
     | .error error => return .parseError error
-  state.tryTacticM goal $ Elab.Tactic.evalTactic tactic
+  match ← executeTactic (state := state.savedState) (goal := goal) (tactic := tactic) with
+  | .error errors =>
+    return .failure errors
+  | .ok nextSavedState =>
+    -- Assert that the definition of metavariables are the same
+    let nextMCtx := nextSavedState.term.meta.meta.mctx
+    let prevMCtx := state.mctx
+    -- Generate a list of mvarIds that exist in the parent state; Also test the
+    -- assertion that the types have not changed on any mvars.
+    return .success {
+      state with
+      savedState := nextSavedState
+      newMVars := newMVarSet prevMCtx nextMCtx,
+      parentMVar? := .some goal,
+      calcPrevRhs? := .none,
+    }
 
-protected def GoalState.tryAssign (state: GoalState) (goal: MVarId) (expr: String):
+/-- Assumes elabM has already been restored. Assumes expr has already typechecked -/
+protected def GoalState.assign (state: GoalState) (goal: MVarId) (expr: Expr):
+      Elab.TermElabM TacticResult := do
+  let goalType ← goal.getType
+  try
+    -- For some reason this is needed. One of the unit tests will fail if this isn't here
+    let error?: Option String ← goal.withContext do
+      let exprType ← Meta.inferType expr
+      if ← Meta.isDefEq goalType exprType then
+        pure .none
+      else do
+        return .some s!"{← Meta.ppExpr expr} : {← Meta.ppExpr exprType} != {← Meta.ppExpr goalType}"
+    if let .some error := error? then
+      return .parseError error
+    goal.checkNotAssigned `GoalState.assign
+    goal.assign expr
+    if (← getThe Core.State).messages.hasErrors then
+      let messages := (← getThe Core.State).messages.getErrorMessages |>.toList.toArray
+      let errors ← (messages.map (·.data)).mapM fun md => md.toString
+      return .failure errors
+    let prevMCtx := state.savedState.term.meta.meta.mctx
+    let nextMCtx ← getMCtx
+    -- Generate a list of mvarIds that exist in the parent state; Also test the
+    -- assertion that the types have not changed on any mvars.
+    let newMVars := newMVarSet prevMCtx nextMCtx
+    let nextGoals ← newMVars.toList.filterM (λ mvar => do pure !(← mvar.isAssigned))
+    return .success {
+      root := state.root,
+      savedState := {
+        term := ← MonadBacktrack.saveState,
+        tactic := { goals := nextGoals }
+      },
+      newMVars,
+      parentMVar? := .some goal,
+      calcPrevRhs? := .none
+    }
+  catch exception =>
+    return .failure #[← exception.toMessageData.toString]
+
+protected def GoalState.tryAssign (state: GoalState) (goalId: Nat) (expr: String):
       Elab.TermElabM TacticResult := do
   state.restoreElabM
+  let goal ← match state.savedState.tactic.goals.get? goalId with
+    | .some goal => pure goal
+    | .none => return .indexError goalId
   let expr ← match Parser.runParserCategory
-    (env := ← MonadEnv.getEnv)
+    (env := state.env)
     (catName := `term)
     (input := expr)
     (fileName := filename) with
     | .ok syn => pure syn
     | .error error => return .parseError error
-  state.tryTacticM goal $ Tactic.evalAssign expr
+  let goalType ← goal.getType
+  try
+    let expr ← goal.withContext $
+      Elab.Term.elabTermAndSynthesize (stx := expr) (expectedType? := .some goalType)
+    state.assign goal expr
+  catch exception =>
+    return .failure #[← exception.toMessageData.toString]
 
 -- Specialized Tactics
 
-protected def GoalState.tryLet (state: GoalState) (goal: MVarId) (binderName: String) (type: String):
+protected def GoalState.tryHave (state: GoalState) (goalId: Nat) (binderName: String) (type: String):
       Elab.TermElabM TacticResult := do
   state.restoreElabM
+  let goal ← match state.savedState.tactic.goals.get? goalId with
+    | .some goal => pure goal
+    | .none => return .indexError goalId
   let type ← match Parser.runParserCategory
-    (env := ← MonadEnv.getEnv)
+    (env := state.env)
     (catName := `term)
     (input := type)
     (fileName := filename) with
     | .ok syn => pure syn
     | .error error => return .parseError error
-  state.tryTacticM goal $ Tactic.evalLet binderName.toName type
+  let binderName := binderName.toName
+  try
+    -- Implemented similarly to the intro tactic
+    let nextGoals: List MVarId ← goal.withContext do
+      let type ← Elab.Term.elabType (stx := type)
+      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 fvar   := mkFVar fvarId
+      let mvarUpstream ←
+        withTheReader Meta.Context (fun ctx => { ctx with lctx := lctxUpstream }) do
+          Meta.withNewLocalInstances #[fvar] 0 do
+            let mvarUpstream ← Meta.mkFreshExprMVarAt (← getLCtx) (← Meta.getLocalInstances)
+              (← goal.getType) (kind := MetavarKind.synthetic) (userName := .anonymous)
+            let expr: Expr := .app (.lam binderName type mvarBranch .default) mvarUpstream
+            goal.assign expr
+            pure mvarUpstream
+
+      pure [mvarBranch.mvarId!, mvarUpstream.mvarId!]
+    return .success {
+      root := state.root,
+      savedState := {
+        term := ← MonadBacktrack.saveState,
+        tactic := { goals := nextGoals }
+      },
+      newMVars := nextGoals.toSSet,
+      parentMVar? := .some goal,
+      calcPrevRhs? := .none
+    }
+  catch exception =>
+    return .failure #[← exception.toMessageData.toString]
+protected def GoalState.tryLet (state: GoalState) (goalId: Nat) (binderName: String) (type: String):
+      Elab.TermElabM TacticResult := do
+  state.restoreElabM
+  let goal ← match state.savedState.tactic.goals.get? goalId with
+    | .some goal => pure goal
+    | .none => return .indexError goalId
+  let type ← match Parser.runParserCategory
+    (env := state.env)
+    (catName := `term)
+    (input := type)
+    (fileName := filename) with
+    | .ok syn => pure syn
+    | .error error => return .parseError error
+  let binderName := binderName.toName
+  try
+    -- Implemented similarly to the intro tactic
+    let nextGoals: List MVarId ← goal.withContext do
+      let type ← Elab.Term.elabType (stx := type)
+      let lctx ← MonadLCtx.getLCtx
+
+      -- The branch goal inherits the same context, but with a different type
+      let mvarBranch ← Meta.mkFreshExprMVarAt lctx (← Meta.getLocalInstances) type
+
+      let upstreamType := .letE binderName type mvarBranch (← goal.getType) false
+      let mvarUpstream ← Meta.mkFreshExprMVarAt (← getLCtx) (← Meta.getLocalInstances)
+        upstreamType (kind := MetavarKind.synthetic) (userName := (← goal.getTag))
+
+      goal.assign mvarUpstream
+
+      pure [mvarBranch.mvarId!, mvarUpstream.mvarId!]
+    return .success {
+      root := state.root,
+      savedState := {
+        term := ← MonadBacktrack.saveState,
+        tactic := { goals := nextGoals }
+      },
+      newMVars := nextGoals.toSSet,
+      parentMVar? := .some goal,
+      calcPrevRhs? := .none
+    }
+  catch exception =>
+    return .failure #[← exception.toMessageData.toString]
 
 /-- Enter conv tactic mode -/
-protected def GoalState.conv (state: GoalState) (goal: MVarId):
+protected def GoalState.conv (state: GoalState) (goalId: Nat):
       Elab.TermElabM TacticResult := do
   if state.convMVar?.isSome then
     return .invalidAction "Already in conv state"
-  goal.checkNotAssigned `GoalState.conv
+  let goal ← match state.savedState.tactic.goals.get? goalId with
+    | .some goal => pure goal
+    | .none => return .indexError goalId
   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!]
+      Elab.Tactic.setGoals [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
+    let prevMCtx := state.mctx
+    let nextMCtx := nextSavedState.term.meta.meta.mctx
     return .success {
       root := state.root,
       savedState := nextSavedState
+      newMVars := newMVarSet prevMCtx nextMCtx,
       parentMVar? := .some goal,
-      convMVar? := .some (convRhs, goal, otherGoals),
+      convMVar? := .some (convRhs, goal),
       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
+  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
@@ -306,9 +355,12 @@ protected def GoalState.convExit (state: GoalState):
     MonadBacktrack.saveState
   try
     let nextSavedState ← tacticM { elaborator := .anonymous } |>.run' state.savedState.tactic
+    let nextMCtx := nextSavedState.term.meta.meta.mctx
+    let prevMCtx := state.savedState.term.meta.meta.mctx
     return .success {
       root := state.root,
       savedState := nextSavedState
+      newMVars := newMVarSet prevMCtx nextMCtx,
       parentMVar? := .some convGoal,
       convMVar? := .none
       calcPrevRhs? := .none
@@ -316,18 +368,19 @@ protected def GoalState.convExit (state: GoalState):
   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
+protected def GoalState.calcPrevRhsOf? (state: GoalState) (goalId: Nat) :=
+  if goalId == 1 then
+    state.calcPrevRhs?
   else
     .none
-@[export pantograph_goal_state_try_calc_m]
-protected def GoalState.tryCalc (state: GoalState) (goal: MVarId) (pred: String):
+protected def GoalState.tryCalc (state: GoalState) (goalId: Nat) (pred: String):
       Elab.TermElabM TacticResult := do
   state.restoreElabM
   if state.convMVar?.isSome then
     return .invalidAction "Cannot initiate `calc` while in `conv` state"
+  let goal ← match state.savedState.tactic.goals.get? goalId with
+    | .some goal => pure goal
+    | .none => return .indexError goalId
   let `(term|$pred) ← match Parser.runParserCategory
     (env := state.env)
     (catName := `term)
@@ -335,11 +388,9 @@ protected def GoalState.tryCalc (state: GoalState) (goal: MVarId) (pred: String)
     (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
+  let calcPrevRhs? := state.calcPrevRhsOf? goalId
+  let target ← instantiateMVars (← goal.getDecl).type
+  let tag := (← goal.getDecl).userName
   try
     goal.withContext do
 
@@ -363,8 +414,9 @@ protected def GoalState.tryCalc (state: GoalState) (goal: MVarId) (pred: String)
       (userName := tag ++ `calc)
     let mvarBranch := proof.mvarId!
 
+    let calcPrevRhs? := Option.some rhs
     let mut proofType ← Meta.inferType proof
-    let mut remainder? := Option.none
+    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
@@ -377,21 +429,84 @@ protected def GoalState.tryCalc (state: GoalState) (goal: MVarId) (pred: String)
       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!
+      remainder := .some lastStepGoal.mvarId!
     goal.assign proof
 
-    let goals := [ mvarBranch ] ++ remainder?.toList
-    let calcPrevRhs? := remainder?.map $ λ g => (g, rhs)
+    let goals := [ mvarBranch ] ++ remainder.toList
     return .success {
       root := state.root,
       savedState := {
         term := ← MonadBacktrack.saveState,
         tactic := { goals },
       },
+      newMVars := goals.toSSet,
       parentMVar? := .some goal,
       calcPrevRhs?
     }
   catch exception =>
     return .failure #[← exception.toMessageData.toString]
 
+
+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,
+  }
+
+/--
+Brings into scope a list of goals
+-/
+protected def GoalState.resume (state: GoalState) (goals: List MVarId): Except String GoalState :=
+  if ¬ (goals.all (λ goal => state.mvars.contains goal)) then
+    .error s!"Goals 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 },
+      },
+      calcPrevRhs? := .none,
+    }
+/--
+Brings into scope all goals from `branch`
+-/
+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)
+
+protected def GoalState.rootExpr? (goalState: GoalState): Option Expr := do
+  let expr ← goalState.mctx.eAssignment.find? goalState.root
+  let (expr, _) := instantiateMVarsCore (mctx := goalState.mctx) (e := expr)
+  if expr.hasMVar 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
+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
+protected def GoalState.assignedExprOf? (goalState: GoalState) (mvar: MVarId): Option Expr := do
+  let expr ← goalState.mctx.eAssignment.find? mvar
+  let (expr, _) := instantiateMVarsCore (mctx := goalState.mctx) (e := expr)
+  return expr
+
+
 end Pantograph

Pantograph/Library.lean

@@ -1,7 +1,7 @@
 import Pantograph.Environment
 import Pantograph.Goal
 import Pantograph.Protocol
-import Pantograph.Delate
+import Pantograph.Serial
 import Pantograph.Version
 import Lean
 
@@ -38,10 +38,13 @@ open Lean
 
 namespace Pantograph
 
+def defaultTermElabMContext: Elab.Term.Context := {
+    errToSorry := false
+  }
 def runMetaM { α } (metaM: MetaM α): CoreM α :=
   metaM.run'
 def runTermElabM { α } (termElabM: Elab.TermElabM α): CoreM α :=
-  termElabM.run' (ctx := defaultElabContext) |>.run'
+  termElabM.run' (ctx := defaultTermElabMContext) |>.run'
 
 def errorI (type desc: String): Protocol.InteractionError := { error := type, desc := desc }
 
@@ -75,12 +78,22 @@ def createCoreState (imports: Array String): IO Core.State := do
     (trustLevel := 1)
   return { env := env }
 
+@[export pantograph_env_catalog_m]
+def envCatalog: CoreM Protocol.EnvCatalogResult :=
+  Environment.catalog ({}: Protocol.EnvCatalog)
+
+@[export pantograph_env_inspect_m]
+def envInspect (name: String) (value: Bool) (dependency: Bool) (options: @&Protocol.Options):
+    CoreM (Protocol.CR Protocol.EnvInspectResult) :=
+  Environment.inspect ({
+    name, value? := .some value, dependency?:= .some dependency
+  }: Protocol.EnvInspect) options
+
 @[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
@@ -91,7 +104,6 @@ def parseElabType (type: String): Elab.TermElabM (Protocol.CR Expr) := do
   | .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
@@ -129,10 +141,45 @@ def goalStartExpr (expr: String) (levels: Array String): CoreM (Protocol.CR Goal
       | .ok expr => pure $ expr
     return .ok $ ← GoalState.create expr
 
+@[export pantograph_goal_tactic_m]
+def goalTactic (state: GoalState) (goalId: Nat) (tactic: String): CoreM TacticResult :=
+  runTermElabM <| state.tryTactic goalId tactic
+
+@[export pantograph_goal_assign_m]
+def goalAssign (state: GoalState) (goalId: Nat) (expr: String): CoreM TacticResult :=
+  runTermElabM <| state.tryAssign goalId expr
+
+@[export pantograph_goal_have_m]
+def goalHave (state: GoalState) (goalId: Nat) (binderName: String) (type: String): CoreM TacticResult :=
+  runTermElabM <| state.tryHave goalId binderName type
+@[export pantograph_goal_let_m]
+def goalLet (state: GoalState) (goalId: Nat) (binderName: String) (type: String): CoreM TacticResult :=
+  runTermElabM <| state.tryLet goalId binderName type
+
+@[export pantograph_goal_conv_m]
+def goalConv (state: GoalState) (goalId: Nat): CoreM TacticResult :=
+  runTermElabM <| state.conv goalId
+
+@[export pantograph_goal_conv_exit_m]
+def goalConvExit (state: GoalState): CoreM TacticResult :=
+  runTermElabM <| state.convExit
+
+@[export pantograph_goal_calc_m]
+def goalCalc (state: GoalState) (goalId: Nat) (pred: String): CoreM TacticResult :=
+  runTermElabM <| state.tryCalc goalId pred
+
+@[export pantograph_goal_focus]
+def goalFocus (state: GoalState) (goalId: Nat): Option GoalState :=
+  state.focus goalId
+
 @[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_continue]
+def goalContinue (target: GoalState) (branch: GoalState): Except String GoalState :=
+  target.continue branch
+
 @[export pantograph_goal_serialize_m]
 def goalSerialize (state: GoalState) (options: @&Protocol.Options): CoreM (Array Protocol.Goal) :=
   runMetaM <| state.serializeGoals (parent := .none) options
@@ -142,63 +189,11 @@ def goalPrint (state: GoalState) (options: @&Protocol.Options): CoreM Protocol.G
   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)),
+      root? := ← state.rootExpr?.mapM (λ expr => do
+        serializeExpression options (← unfoldAuxLemmas expr)),
+      parent? := ← state.parentExpr?.mapM (λ expr => do
+        serializeExpression options (← unfoldAuxLemmas 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

@@ -27,8 +27,6 @@ structure Options where
   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
@@ -53,7 +51,7 @@ structure Variable where
   /-- The name displayed to the user -/
   userName: String
   /-- Does the name contain a dagger -/
-  isInaccessible: Bool := false
+  isInaccessible?: Option Bool := .none
   type?: Option Expression  := .none
   value?: Option Expression := .none
   deriving Lean.ToJson
@@ -183,12 +181,6 @@ structure EnvAdd where
 structure EnvAddResult where
   deriving Lean.ToJson
 
-structure EnvSaveLoad where
-  path: System.FilePath
-  deriving Lean.FromJson
-structure EnvSaveLoadResult where
-  deriving Lean.ToJson
-
 /-- Set options; See `Options` struct above for meanings -/
 structure OptionsSet where
   printJsonPretty?: Option Bool
@@ -198,12 +190,12 @@ structure OptionsSet where
   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
+abbrev OptionsPrintResult := Options
 
 structure GoalStart where
   -- Only one of the fields below may be populated.
@@ -225,7 +217,6 @@ structure GoalTactic where
   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
@@ -287,40 +278,6 @@ structure GoalDiag where
   -- 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
 

Pantograph/Serial.lean

@@ -1,73 +1,321 @@
-import Lean.Environment
-import Lean.Replay
-import Init.System.IOError
-import Std.Data.HashMap
-
-/-!
-Input/Output functions
-
-# Pickling and unpickling objects
-
-By abusing `saveModuleData` and `readModuleData` we can pickle and unpickle objects to disk.
+/-
+All serialisation functions;
+This replicates the behaviour of `Scope`s in `Lean/Elab/Command.lean` without
+using `Scope`s.
 -/
+import Lean
+
+import Pantograph.Protocol
+import Pantograph.Goal
 
 open Lean
 
+-- Symbol processing functions --
+
+def Lean.Name.isAuxLemma (n : Lean.Name) : Bool := n matches .num (.str _ "_auxLemma") _
+
 namespace Pantograph
 
-/--
-Save an object to disk.
-If you need to write multiple objects from within a single declaration,
-you will need to provide a unique `key` for each.
--/
-def pickle {α : Type} (path : System.FilePath) (x : α) (key : Name := by exact decl_name%) : IO Unit :=
-  saveModuleData path key (unsafe unsafeCast x)
+/-- Unfold all lemmas created by `Lean.Meta.mkAuxLemma`. These end in `_auxLemma.nn` where `nn` is a number. -/
+def unfoldAuxLemmas (e : Expr) : CoreM Expr := do
+  Lean.Meta.deltaExpand e Lean.Name.isAuxLemma
+
+--- Input Functions ---
+
+/-- Read syntax object from string -/
+def parseTerm (env: Environment) (s: String): Except String Syntax :=
+  Parser.runParserCategory
+    (env := env)
+    (catName := `term)
+    (input := s)
+    (fileName := "<stdin>")
+
+/-- Parse a syntax object. May generate additional metavariables! -/
+def elabType (syn: Syntax): Elab.TermElabM (Except String Expr) := do
+  try
+    let expr ← Elab.Term.elabType syn
+    return .ok expr
+  catch ex => return .error (← ex.toMessageData.toString)
+def elabTerm (syn: Syntax) (expectedType? : Option Expr := .none): Elab.TermElabM (Except String Expr) := do
+  try
+    let expr ← Elab.Term.elabTerm (stx := syn) expectedType?
+    return .ok expr
+  catch ex => return .error (← ex.toMessageData.toString)
+
+
+--- Output Functions ---
+
+def typeExprToBound (expr: Expr): MetaM Protocol.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
+
+/-- serialize a sort level. Expression is optimized to be compact e.g. `(+ u 2)` -/
+partial def serializeSortLevel (level: Level) (sanitize: Bool): 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
+      s!"(:max {v} {w})"
+    | .imax v w =>
+      let v := serializeSortLevel v sanitize
+      let w := serializeSortLevel w sanitize
+      s!"(:imax {v} {w})"
+    | .param name =>
+      let name := serializeName name sanitize
+      s!"{name}"
+    | .mvar id =>
+      let name := serializeName id.name sanitize
+      s!"(:mv {name})"
+  match k, u with
+  | 0, _ => u_str
+  | _, .zero => s!"{k}"
+  | _, _ => s!"(+ {u_str} {k})"
 
 /--
-Load an object from disk.
-Note: The returned `CompactedRegion` can be used to free the memory behind the value
-of type `α`, using `CompactedRegion.free` (which is only safe once all references to the `α` are
-released). Ignoring the `CompactedRegion` results in the data being leaked.
-Use `withUnpickle` to call `CompactedRegion.free` automatically.
+ Completely serializes an expression tree. Json not used due to compactness
 
-This function is unsafe because the data being loaded may not actually have type `α`, and this
-may cause crashes or other bad behavior.
+A `_` symbol in the AST indicates automatic deductions not present in the original expression.
 -/
-unsafe def unpickle (α : Type) (path : System.FilePath) : IO (α × CompactedRegion) := do
-  let (x, region) ← readModuleData path
-  pure (unsafeCast x, region)
+partial def serializeExpressionSexp (expr: Expr) (sanitize: Bool := true): MetaM String := do
+  self expr
+  where
+  self (e: Expr): MetaM String :=
+    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 =>
+      let name := ofName mvarId.name
+      pure s!"(:mv {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 typeName idx inner => do
+      let env ← getEnv
+      let ctor := getStructureCtor env typeName
+      let fieldName := getStructureFields env typeName |>.get! idx
+      let projectorName := getProjFnForField? env typeName fieldName |>.get!
 
-/-- Load an object from disk and run some continuation on it, freeing memory afterwards. -/
-unsafe def withUnpickle [Monad m] [MonadLiftT IO m] {α β : Type}
-    (path : System.FilePath) (f : α → m β) : m β := do
-  let (x, region) ← unpickle α path
-  let r ← f x
-  region.free
-  pure r
+      let autos := String.intercalate " " (List.replicate ctor.numParams "_")
+      let inner ← self inner
+      pure s!"((:c {projectorName}) {autos} {inner})"
+  -- Elides all unhygenic names
+  binderInfoSexp : Lean.BinderInfo → String
+    | .default => ""
+    | .implicit => " :implicit"
+    | .strictImplicit => " :strictImplicit"
+    | .instImplicit => " :instImplicit"
+  ofName (name: Name) := serializeName name sanitize
 
-/--
-Pickle an `Environment` to disk.
+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
+  return {
+    pp?,
+    sexp?
+    dependentMVars?,
+  }
 
-We only store:
-* the list of imports
-* the new constants from `Environment.constants`
-and when unpickling, we build a fresh `Environment` from the imports,
-and then add the new constants.
--/
-@[export pantograph_env_pickle_m]
-def env_pickle (env : Environment) (path : System.FilePath) : IO Unit :=
-  Pantograph.pickle path (env.header.imports, env.constants.map₂)
+/-- Adapted from ppGoal -/
+def serializeGoal (options: @&Protocol.Options) (goal: MVarId) (mvarDecl: MetavarDecl) (parentDecl?: Option MetavarDecl)
+      : MetaM Protocol.Goal := do
+  -- Options for printing; See Meta.ppGoal for details
+  let showLetValues  := true
+  let ppAuxDecls     := options.printAuxDecls
+  let ppImplDetailHyps := options.printImplementationDetailHyps
+  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
+      match localDecl with
+      | .cdecl _ fvarId userName _ _ _ =>
+        let userName := userName.simpMacroScopes
+        return {
+          name := ofName fvarId.name,
+          userName:= ofName userName.simpMacroScopes,
+        }
+      | .ldecl _ fvarId userName _ _ _ _ => do
+        return {
+          name := ofName fvarId.name,
+          userName := toString userName.simpMacroScopes,
+        }
+    let ppVar (localDecl : LocalDecl) : MetaM Protocol.Variable := do
+      match localDecl with
+      | .cdecl _ fvarId userName type _ _ =>
+        let userName := userName.simpMacroScopes
+        let type ← instantiateMVars type
+        return {
+          name := ofName fvarId.name,
+          userName:= ofName userName,
+          isInaccessible? := .some userName.isInaccessibleUserName
+          type? := .some (← serializeExpression options type)
+        }
+      | .ldecl _ fvarId userName type val _ _ => do
+        let userName := userName.simpMacroScopes
+        let type ← instantiateMVars type
+        let value? ← if showLetValues then
+          let val ← instantiateMVars val
+          pure $ .some (← serializeExpression options val)
+        else
+          pure $ .none
+        return {
+          name := ofName fvarId.name,
+          userName:= ofName userName,
+          isInaccessible? := .some userName.isInaccessibleUserName
+          type? := .some (← serializeExpression options type)
+          value? := 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 nameOnly := options.noRepeat && (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 (← instantiateMVars mvarDecl.type)),
+      vars := vars.reverse.toArray
+    }
+  where
+  ofName (n: Name) := serializeName n (sanitize := false)
 
-/--
-Unpickle an `Environment` from disk.
+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}"
 
-We construct a fresh `Environment` with the relevant imports,
-and then replace the new constants.
--/
-@[export pantograph_env_unpickle_m]
-def env_unpickle (path : System.FilePath) : IO (Environment × CompactedRegion) := unsafe do
-  let ((imports, map₂), region) ← Pantograph.unpickle (Array Import × PHashMap Name ConstantInfo) path
-  let env ← importModules imports {} 0
-  return (← env.replay (Std.HashMap.ofList map₂.toList), region)
+/-- Print the metavariables in a readable format -/
+protected def GoalState.diag (goalState: GoalState) (options: Protocol.GoalDiag := {}): MetaM Unit := do
+  goalState.restoreMetaM
+  let savedState := goalState.savedState
+  let goals := savedState.tactic.goals
+  let mctx ← getMCtx
+  let root := goalState.root
+  -- Print the root
+  match mctx.decls.find? root with
+  | .some decl => printMVar ">" root decl
+  | .none => IO.println s!">{root.name}: ??"
+  goals.forM (fun mvarId => do
+    if mvarId != root then
+      match mctx.decls.find? mvarId with
+      | .some decl => printMVar "⊢" mvarId decl
+      | .none => IO.println s!"⊢{mvarId.name}: ??"
+  )
+  let goals := goals.toSSet
+  mctx.decls.forM (fun mvarId decl => do
+    if goals.contains mvarId || mvarId == root then
+      pure ()
+    -- Print the remainig ones that users don't see in Lean
+    else if options.printAll then
+      let pref := if goalState.newMVars.contains mvarId then "~" else " "
+      printMVar pref mvarId decl
+    else
+      pure ()
+      --IO.println s!" {mvarId.name}{userNameToString decl.userName}"
+  )
+  where
+    printMVar (pref: String) (mvarId: MVarId) (decl: MetavarDecl): MetaM Unit := do
+      if options.printContext then
+        decl.lctx.fvarIdToDecl.forM printFVar
+      let type ← if options.instantiate
+        then instantiateMVars decl.type
+        else pure $ decl.type
+      let type_sexp ← serializeExpressionSexp type (sanitize := false)
+      IO.println s!"{pref}{mvarId.name}{userNameToString decl.userName}: {← Meta.ppExpr decl.type} {type_sexp}"
+      if options.printValue then
+        if let Option.some value := (← getMCtx).eAssignment.find? mvarId then
+          let value ← if options.instantiate
+            then instantiateMVars value
+            else pure $ value
+          IO.println s!" := {← Meta.ppExpr value}"
+    printFVar (fvarId: FVarId) (decl: LocalDecl): MetaM Unit := do
+      IO.println s!" | {fvarId.name}{userNameToString decl.userName}: {← Meta.ppExpr decl.type}"
+    userNameToString : Name → String
+      | .anonymous => ""
+      | other => s!"[{other}]"
 
 end Pantograph

Pantograph/Tactic.lean

@@ -1,5 +0,0 @@
-import Pantograph.Tactic.Assign
-import Pantograph.Tactic.Congruence
-import Pantograph.Tactic.MotivatedApply
-import Pantograph.Tactic.NoConfuse
-import Pantograph.Tactic.Prograde

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 +1,6 @@
 namespace Pantograph
 
 @[export pantograph_version]
-def version := "0.2.19"
+def version := "0.2.15"
 
 end Pantograph

README.md

@@ -9,17 +9,30 @@ 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.
+For Nix based workflow, see below.
 
-Install `elan` and `lake`, and run
+Install `elan` and `lake`. Execute
 ``` sh
-lake build
+make
+```
+This builds the executable in `.lake/build/bin/pantograph`.
+
+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
 ```
-This builds the executable in `.lake/build/bin/pantograph-repl`.
 
 ## Executable Usage
 
@@ -77,11 +90,6 @@ See `Pantograph/Protocol.lean` for a description of the parameters and return va
   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`
-
-  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
@@ -101,10 +109,6 @@ See `Pantograph/Protocol.lean` for a description of the parameters and return va
   - `{ "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
 
@@ -121,25 +125,6 @@ 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
 
 If lean encounters stack overflow problems when printing catalog, execute this before running lean:
@@ -153,28 +138,24 @@ ulimit -s unlimited
 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
+make test
+```
+
+## Nix based workflow
+
+The included Nix flake provides build targets for `sharedLib` and `executable`.
+The executable can be used as-is, but linking against the shared library
+requires the presence of `lean-all`.
+
+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"
-```

Repl.lean

@@ -1,276 +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 := defaultElabContext) |>.run'
-
-/-- Main loop command of the REPL -/
-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}"
-  try
-    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
-    | "env.save"      => run env_save
-    | "env.load"      => run env_load
-    | "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
-  catch ex => do
-    let error ← ex.toMessageData.toString
-    return Lean.toJson $ errorIO error
-  where
-  errorCommand := errorI "command"
-  errorIndex := errorI "index"
-  errorIO := errorI "io"
-  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
-  env_save (args: Protocol.EnvSaveLoad): MainM (CR Protocol.EnvSaveLoadResult) := do
-    let env ← Lean.MonadEnv.getEnv
-    env_pickle env args.path
-    return .ok {}
-  env_load (args: Protocol.EnvSaveLoad): MainM (CR Protocol.EnvSaveLoadResult) := do
-    let (env, _) ← env_unpickle args.path
-    Lean.setEnv env
-    return .ok {}
-  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

@@ -8,33 +8,20 @@ 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 :=
+/-- Set internal names to "" -/
+def Goal.devolatilize (goal: Goal): Goal :=
   {
     goal with
+    name := "",
     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
@@ -43,33 +30,13 @@ 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}"
+  | .indexError index => s!".indexError {index}"
   | .invalidAction error => s!".invalidAction {error}"
 
 namespace Test
@@ -89,65 +56,7 @@ def runCoreMSeq (env: Environment) (coreM: CoreM LSpec.TestSeq) (options: Array
 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 := defaultElabContext)
-def runTermElabMSeq (env: Environment) (termElabM: Elab.TermElabM LSpec.TestSeq): IO LSpec.TestSeq :=
-  runMetaMSeq env $ termElabM.run' (ctx := defaultElabContext)
-
-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
-  }
+  termElabM.run' (ctx := Pantograph.defaultTermElabMContext)
 
 end Test
 

Test/Environment.lean

@@ -1,5 +1,5 @@
 import LSpec
-import Pantograph.Delate
+import Pantograph.Serial
 import Pantograph.Environment
 import Test.Common
 import Lean
@@ -33,7 +33,7 @@ def test_catalog: IO LSpec.TestSeq := do
 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),
+    ("Lean.Name".toName, true),
     ("Init.Data.Nat.Basic._auxLemma.4".toName, true),
   ]
   let suite := entries.foldl (λ suites (symbol, target) =>

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

@@ -2,24 +2,39 @@
  -/
 import LSpec
 import Pantograph
-import Repl
-import Test.Common
-
 namespace Pantograph.Test.Integration
-open Pantograph.Repl
+open Pantograph
 
-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))
+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
 
-abbrev Test := List (MainM LSpec.TestSeq)
+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 ← createCoreContext #[]
+  let commands: MainM LSpec.TestSeq :=
+    steps.foldlM (λ suite step => do
+      let result ← step
+      return suite ++ result) LSpec.TestSeq.done
+  try
+    let coreM := commands.run context |>.run' {}
+    return Prod.fst $ (← coreM.toIO coreContext { env := env })
+  catch ex =>
+    return LSpec.check s!"Uncaught IO exception: {ex.toString}" false
 
-def test_elab : Test :=
-  [
-    step "expr.echo"
+def test_elab : IO LSpec.TestSeq :=
+  subroutine_runner [
+    subroutine_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" },
@@ -27,232 +42,130 @@ def test_elab : Test :=
      }: Protocol.ExprEchoResult)),
   ]
 
-def test_option_modify : Test :=
+def test_option_modify : IO LSpec.TestSeq :=
   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),
+  subroutine_runner [
+    subroutine_step "env.inspect"
+      [("name", .str "Nat.add_one")]
+     (Lean.toJson ({
+       type := { pp? }, module? }:
+      Protocol.EnvInspectResult)),
+    subroutine_step "options.set"
+      [("printExprAST", .bool true)]
+     (Lean.toJson ({ }:
+      Protocol.OptionsSetResult)),
+    subroutine_step "env.inspect"
+      [("name", .str "Nat.add_one")]
+     (Lean.toJson ({
+       type := { pp?, sexp? }, module? }:
+      Protocol.EnvInspectResult)),
+    subroutine_step "options.print"
+      []
+     (Lean.toJson ({ options with printExprAST := true }:
+      Protocol.OptionsPrintResult))
   ]
-def test_malformed_command : Test :=
+def test_malformed_command : IO LSpec.TestSeq :=
   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")
+  subroutine_runner [
+    subroutine_named_step "Invalid command" invalid
+      [("name", .str "Nat.add_one")]
+     (Lean.toJson ({
+       error := "command", desc := s!"Unknown command {invalid}"}:
+      Protocol.InteractionError)),
+    subroutine_named_step "JSON Deserialization" "expr.echo"
+      [(invalid, .str "Random garbage data")]
+     (Lean.toJson ({
+       error := "command", desc := s!"Unable to parse json: Pantograph.Protocol.ExprEcho.expr: String expected"}:
+      Protocol.InteractionError))
   ]
-def test_tactic : Test :=
+def test_tactic : IO LSpec.TestSeq :=
   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" }}],
+    vars := #[{ name := "_uniq.10", userName := "x", isInaccessible? := .some false, type? := .some { pp? := .some "Prop" }}],
   }
   let goal2: Protocol.Goal := {
-    name := "_uniq.17",
+    name := "_uniq.14",
     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" }}
+      { name := "_uniq.10", userName := "x", isInaccessible? := .some false, type? := .some { pp? := .some "Prop" }},
+      { name := "_uniq.13", userName := "y", isInaccessible? := .some false, 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),
+  subroutine_runner [
+    subroutine_step "goal.start"
+      [("expr", .str "∀ (p q: Prop), p ∨ q → q ∨ p")]
+     (Lean.toJson ({stateId := 0, root := "_uniq.9"}:
+      Protocol.GoalStartResult)),
+    subroutine_step "goal.tactic"
+      [("stateId", .num 0), ("goalId", .num 0), ("tactic", .str "intro x")]
+     (Lean.toJson ({
+       nextStateId? := .some 1,
+       goals? := #[goal1],
+     }:
+      Protocol.GoalTacticResult)),
+    subroutine_step "goal.print"
+      [("stateId", .num 1)]
+     (Lean.toJson ({
+       parent? := .some { pp? := .some "fun x => ?m.12 x" },
+     }:
+      Protocol.GoalPrintResult)),
+    subroutine_step "goal.tactic"
+      [("stateId", .num 1), ("goalId", .num 0), ("tactic", .str "intro y")]
+     (Lean.toJson ({
+       nextStateId? := .some 2,
+       goals? := #[goal2],
+     }:
+      Protocol.GoalTacticResult))
   ]
 
-def test_env_add_inspect : Test :=
+def test_env_add_inspect : IO LSpec.TestSeq :=
   let name1 := "Pantograph.mystery"
   let name2 := "Pantograph.mystery2"
-  [
-    step "env.add"
+  subroutine_runner [
+    subroutine_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)]
-     ({
+     (Lean.toJson ({}: Protocol.EnvAddResult)),
+    subroutine_step "env.inspect"
+      [("name", .str name1)]
+     (Lean.toJson ({
        value? := .some { pp? := .some "fun a b => a ∨ b" },
        type := { pp? := .some "Prop → Prop → Prop" },
      }:
-      Protocol.EnvInspectResult),
-    step "env.add"
+      Protocol.EnvInspectResult)),
+    subroutine_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)]
-     ({
+     (Lean.toJson ({}: Protocol.EnvAddResult)),
+    subroutine_step "env.inspect"
+      [("name", .str name2)]
+     (Lean.toJson ({
        value? := .some { pp? := .some "fun a => ↑a + 1" },
        type := { pp? := .some "Nat → Int" },
      }:
-      Protocol.EnvInspectResult)
+      Protocol.EnvInspectResult))
   ]
 
-example : ∀ (p: Prop), p → p := by
-  intro p h
-  exact h
-
-def test_frontend_process : Test :=
+def suite: List (String × IO LSpec.TestSeq) :=
   [
-    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
-  -- Setup the environment for execution
-  let context: Context := {
-    imports := ["Init"]
-  }
-  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' {}
-
-
-def suite (env : Lean.Environment): List (String × IO LSpec.TestSeq) :=
-  let tests := [
-    ("expr.echo", test_elab),
-    ("options.set options.print", test_option_modify),
+    ("Elab", test_elab),
+    ("Option modify", 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),
   ]
-  tests.map (fun (name, test) => (name, runTest env test))
 
 
 end Pantograph.Test.Integration

Test/Main.lean

@@ -1,12 +1,10 @@
 import LSpec
 import Test.Environment
-import Test.Frontend
 import Test.Integration
 import Test.Library
 import Test.Metavar
 import Test.Proofs
-import Test.Delate
-import Test.Tactic
+import Test.Serial
 
 -- Test running infrastructure
 
@@ -45,16 +43,11 @@ def main (args: List String) := do
 
   let suites: List (String × List (String × IO LSpec.TestSeq)) := [
     ("Environment", Environment.suite),
-    ("Frontend", Frontend.suite env_default),
-    ("Integration", Integration.suite env_default),
+    ("Integration", Integration.suite),
     ("Library", Library.suite env_default),
     ("Metavar", Metavar.suite env_default),
     ("Proofs", Proofs.suite env_default),
-    ("Delate", Delate.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),
+    ("Serial", Serial.suite env_default),
   ]
   let tests: List (String × IO LSpec.TestSeq) := suites.foldl (λ acc (name, suite) => acc ++ (addPrefix name suite)) []
   LSpec.lspecIO (← runTestGroup name_filter tests)

Test/Metavar.lean

@@ -1,6 +1,6 @@
 import LSpec
 import Pantograph.Goal
-import Pantograph.Delate
+import Pantograph.Serial
 import Test.Common
 import Lean
 
@@ -60,13 +60,14 @@ def buildGoal (nameType: List (String × String)) (target: String) (userName?: O
     vars := (nameType.map fun x => ({
       userName := x.fst,
       type? := .some { pp? := .some x.snd },
+      isInaccessible? := .some 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 := defaultElabContext)
+  let metaM := termElabM.run' (ctx := defaultTermElabMContext)
   let coreM := metaM.run'
   match ← (coreM.run' coreContext { env := env }).toBaseIO with
   | .error exception =>
@@ -83,7 +84,7 @@ def test_m_couple: TestM Unit := do
       addTest $ assertUnreachable "Goal could not parse"
       return ()
 
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := "apply Nat.le_trans") with
+  let state1 ← match ← state0.tryTactic (goalId := 0) (tactic := "apply Nat.le_trans") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -92,7 +93,7 @@ def test_m_couple: TestM Unit := do
     #[.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
+  let state2 ← match ← state1.tryTactic (goalId := 2) (tactic := "exact 3") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -115,7 +116,7 @@ def test_m_couple_simp: TestM Unit := do
       addTest $ assertUnreachable "Goal could not parse"
       return ()
 
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := "apply Nat.le_trans") with
+  let state1 ← match ← state0.tryTactic (goalId := 0) (tactic := "apply Nat.le_trans") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -126,7 +127,7 @@ def test_m_couple_simp: TestM Unit := do
   addTest $ LSpec.check "(metavariables)" (serializedState1.map (·.target.dependentMVars?.get!) =
     #[#["_uniq.38"], #["_uniq.38"], #[]])
 
-  let state2 ← match ← state1.tacticOn (goalId := 2) (tactic := "exact 2") with
+  let state2 ← match ← state1.tryTactic (goalId := 2) (tactic := "exact 2") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -140,7 +141,7 @@ def test_m_couple_simp: TestM Unit := do
   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
+  let state3 ← match ← state1b.tryTactic (goalId := 0) (tactic := "simp") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -150,7 +151,7 @@ def test_m_couple_simp: TestM Unit := do
       addTest $ assertUnreachable $ msg
       return ()
     | .ok state => pure state
-  let state5 ← match ← state4.tacticOn (goalId := 0) (tactic := "simp") with
+  let state5 ← match ← state4.tryTactic (goalId := 0) (tactic := "simp") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -177,7 +178,7 @@ def test_proposition_generation: TestM Unit := do
       addTest $ assertUnreachable "Goal could not parse"
       return ()
 
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := "apply PSigma.mk") with
+  let state1 ← match ← state0.tryTactic (goalId := 0) (tactic := "apply PSigma.mk") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -191,22 +192,21 @@ def test_proposition_generation: TestM Unit := do
     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
+  let state2 ← match ← state1.tryAssign (goalId := 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"])
+    #[.some "Nat → Prop", .some "∀ (x : Nat), ?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
+  let state3 ← match ← state2.tryAssign (goalId := 1) (expr := "fun x => Eq.refl x") 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.check ":= Eq.refl" ((← state3.serializeGoals (options := ← read)).map (·.target.pp?) =
     #[])
 
   addTest $ LSpec.test "(3 root)" state3.rootExpr?.isSome
@@ -220,7 +220,7 @@ def test_partial_continuation: TestM Unit := do
       addTest $ assertUnreachable "Goal could not parse"
       return ()
 
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := "apply Nat.le_trans") with
+  let state1 ← match ← state0.tryTactic (goalId := 0) (tactic := "apply Nat.le_trans") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -228,7 +228,7 @@ def test_partial_continuation: TestM Unit := do
   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
+  let state2 ← match ← state1.tryTactic (goalId := 2) (tactic := "apply Nat.succ") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -263,7 +263,7 @@ def test_partial_continuation: TestM Unit := do
 
   -- 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")
+  | .error error => addTest $ LSpec.check "(continuation failure message)" (error = "Goals not in scope")
   | .ok _ => addTest $ assertUnreachable "(continuation failure)"
   -- Continuation should fail if some goals have not been solved
   match state2.continue state1 with

Test/Proofs.lean

@@ -3,7 +3,7 @@ Tests pertaining to goals with no interdependencies
 -/
 import LSpec
 import Pantograph.Goal
-import Pantograph.Delate
+import Pantograph.Serial
 import Test.Common
 
 namespace Pantograph.Test.Proofs
@@ -49,32 +49,21 @@ 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 :=
-  {
-    name,
-    userName?,
-    target := { pp? := .some target},
-    vars := (nameType.map fun x => ({
-      userName := x.fst,
-      type? := .some { pp? := .some x.snd },
-    })).toArray
-  }
-def buildGoal (nameType: List (String × String)) (target: String) (userName?: Option String := .none):
-    Protocol.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 },
+      isInaccessible? := .some 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 := defaultElabContext)
+  let metaM := termElabM.run' (ctx := defaultTermElabMContext)
   let coreM := metaM.run'
   match ← (coreM.run' coreContext { env := env }).toBaseIO with
   | .error exception =>
@@ -82,27 +71,6 @@ def proofRunner (env: Lean.Environment) (tests: TestM Unit): IO LSpec.TestSeq :=
   | .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
@@ -118,7 +86,7 @@ def test_nat_add_comm (manual: Bool): TestM Unit := do
       addTest $ assertUnreachable "Goal could not parse"
       return ()
 
-  let state1 ← match ← state0.tacticOn 0 "intro n m" with
+  let state1 ← match ← state0.tryTactic (goalId := 0) (tactic := "intro n m") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -126,13 +94,13 @@ def test_nat_add_comm (manual: Bool): TestM Unit := do
   addTest $ LSpec.check "intro n m" ((← state1.serializeGoals (options := ← read)).map (·.devolatilize) =
     #[buildGoal [("n", "Nat"), ("m", "Nat")] "n + m = m + n"])
 
-  match ← state1.tacticOn 0 "assumption" with
+  match ← state1.tryTactic (goalId := 0) (tactic := "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
 
-  let state2 ← match ← state1.tacticOn 0 "rw [Nat.add_comm]" with
+  let state2 ← match ← state1.tryTactic (goalId := 0) (tactic := "rw [Nat.add_comm]") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -150,14 +118,14 @@ def test_delta_variable: TestM Unit := do
       addTest $ assertUnreachable "Goal could not parse"
       return ()
 
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := "intro n") with
+  let state1 ← match ← state0.tryTactic (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
+  let state2 ← match ← state1.tryTactic (goalId := 0) (tactic := "intro m") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -173,6 +141,7 @@ def test_delta_variable: TestM Unit := do
       vars := (nameType.map fun x => ({
         userName := x.fst,
         type? := x.snd.map (λ type => { pp? := type }),
+        isInaccessible? := x.snd.map (λ _ => false)
       })).toArray
     }
 
@@ -189,14 +158,14 @@ def test_arith: TestM Unit := do
       return ()
 
   let tactic := "intros"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
+  let state1 ← match ← state0.tryTactic (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
+  let state2 ← match ← state1.tryTactic (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
@@ -204,7 +173,7 @@ def test_arith: TestM Unit := do
   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
+  let state3 ← match ← state2.tryTactic (goalId := 0) (tactic := tactic) with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -239,81 +208,56 @@ def test_or_comm: TestM Unit := do
   addTest $ LSpec.check "(0 root)" state0.rootExpr?.isNone
 
   let tactic := "intro p q h"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
+  let state1 ← match ← state0.tryTactic (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 tactic ((← state1.serializeGoals (options := ← read)).map (·.devolatilize) =
+    #[buildGoal [("p", "Prop"), ("q", "Prop"), ("h", "p ∨ q")] "q ∨ p"])
   addTest $ LSpec.check "(1 parent)" state1.parentExpr?.isSome
   addTest $ LSpec.check "(1 root)" state1.rootExpr?.isNone
 
-  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
+  let state2 ← match ← state1.tryTactic (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 parent)" 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}))"
+  let state2parent ← serializeExpressionSexp state2.parentExpr?.get! (sanitize := false)
+  -- This is due to delayed assignment
   addTest $ LSpec.test "(2 parent)" (state2parent ==
-    s!"((:c Or.casesOn) (:fv {fvP}) (:fv {fvQ}) {motive} (:fv {fvH}) {caseL} {caseR} {conduit})")
+    "((:mv _uniq.43) (:fv _uniq.16) ((:c Eq.refl) ((:c Or) (:fv _uniq.10) (:fv _uniq.13)) (:fv _uniq.16)))")
 
-  let state3_1 ← match ← state2.tacticOn (goalId := 0) (tactic := "apply Or.inr") with
+  let state3_1 ← match ← state2.tryTactic (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))")
+  let state3_1parent ← serializeExpressionSexp state3_1.parentExpr?.get! (sanitize := false)
+  addTest $ LSpec.test "(3_1 parent)" (state3_1parent == "((:c Or.inr) (:fv _uniq.13) (:fv _uniq.10) (:mv _uniq.78))")
   addTest $ LSpec.check "· apply Or.inr" (state3_1.goals.length = 1)
-  let state4_1 ← match ← state3_1.tacticOn (goalId := 0) (tactic := "assumption") with
+  let state4_1 ← match ← state3_1.tryTactic (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
+  let state4_1parent ← serializeExpressionSexp state4_1.parentExpr?.get! (sanitize := false)
+  addTest $ LSpec.test "(4_1 parent)" (state4_1parent == "(:fv _uniq.47)")
   addTest $ LSpec.check "(4_1 root)" state4_1.rootExpr?.isNone
-  let state3_2 ← match ← state2.tacticOn (goalId := 1) (tactic := "apply Or.inl") with
+  let state3_2 ← match ← state2.tryTactic (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
+  let state4_2 ← match ← state3_2.tryTactic (goalId := 0) (tactic := "assumption") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -327,13 +271,13 @@ def test_or_comm: TestM Unit := do
       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
+  let state3_1 ← match ← state2b.tryTactic (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
+  let state4_1 ← match ← state3_1.tryTactic (goalId := 0) (tactic := "assumption") with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -348,12 +292,75 @@ def test_or_comm: TestM Unit := do
       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 }
+        { userName := "p", type? := .some typeProp, isInaccessible? := .some false },
+        { userName := "q", type? := .some typeProp, isInaccessible? := .some false },
+        { userName := "h✝", type? := .some { pp? := .some varName }, isInaccessible? := .some true }
       ]
     }
 
+def test_have: TestM Unit := do
+  let state? ← startProof (.expr "∀ (p q: Prop), p → ((p ∨ q) ∨ (p ∨ q))")
+  let state0 ← match state? with
+    | .some state => pure state
+    | .none => do
+      addTest $ assertUnreachable "Goal could not parse"
+      return ()
+  let tactic := "intro p q h"
+  let state1 ← match ← state0.tryTactic (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 [("p", "Prop"), ("q", "Prop"), ("h", "p")] "(p ∨ q) ∨ p ∨ q"])
+
+  let expr := "Or.inl (Or.inl h)"
+  let state2 ← match ← state1.tryAssign (goalId := 0) (expr := expr) with
+    | .success state => pure state
+    | other => do
+      addTest $ assertUnreachable $ other.toString
+      return ()
+  addTest $ LSpec.check s!":= {expr}" ((← state2.serializeGoals (options := ← read)).map (·.devolatilize) =
+    #[])
+
+  let haveBind := "y"
+  let haveType := "p ∨ q"
+  let state2 ← match ← state1.tryHave (goalId := 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 (options := ← read)).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 (goalId := 0) (expr := expr) with
+    | .success state => pure state
+    | other => do
+      addTest $ assertUnreachable $ other.toString
+      return ()
+  addTest $ LSpec.check s!":= {expr}" ((← state3.serializeGoals (options := ← read)).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 (goalId := 0) (expr := expr) with
+    | .success state => pure state
+    | other => do
+      addTest $ assertUnreachable $ other.toString
+      return ()
+  addTest $ LSpec.check s!":= {expr}" ((← state4.serializeGoals (options := ← read)).map (·.devolatilize) =
+    #[])
+
+  addTest $ LSpec.check "(4 root)" state4.rootExpr?.isSome
+
 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 =>
@@ -372,7 +379,7 @@ def test_conv: TestM Unit := do
       return ()
 
   let tactic := "intro a b c1 c2 h"
-  let state1 ← match ← state0.tacticOn (goalId := 0) (tactic := tactic) with
+  let state1 ← match ← state0.tryTactic (goalId := 0) (tactic := tactic) with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -380,7 +387,7 @@ def test_conv: TestM Unit := do
   addTest $ LSpec.check tactic ((← state1.serializeGoals (options := ← read)).map (·.devolatilize) =
     #[interiorGoal [] "a + b + c1 = b + a + c2"])
 
-  let state2 ← match ← state1.conv (state1.get! 0) with
+  let state2 ← match ← state1.conv (goalId := 0) with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -389,7 +396,7 @@ def test_conv: TestM Unit := do
     #[{ interiorGoal [] "a + b + c1 = b + a + c2" with isConversion := true }])
 
   let convTactic := "rhs"
-  let state3R ← match ← state2.tacticOn (goalId := 0) convTactic with
+  let state3R ← match ← state2.tryTactic (goalId := 0) convTactic with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -398,7 +405,7 @@ def test_conv: TestM Unit := do
     #[{ interiorGoal [] "b + a + c2" with isConversion := true }])
 
   let convTactic := "lhs"
-  let state3L ← match ← state2.tacticOn (goalId := 0) convTactic with
+  let state3L ← match ← state2.tryTactic (goalId := 0) convTactic with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -407,7 +414,7 @@ def test_conv: TestM Unit := do
     #[{ interiorGoal [] "a + b + c1" with isConversion := true }])
 
   let convTactic := "congr"
-  let state4 ← match ← state3L.tacticOn (goalId := 0) convTactic with
+  let state4 ← match ← state3L.tryTactic (goalId := 0) convTactic with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -419,7 +426,7 @@ def test_conv: TestM Unit := do
     ])
 
   let convTactic := "rw [Nat.add_comm]"
-  let state5_1 ← match ← state4.tacticOn (goalId := 0) convTactic with
+  let state5_1 ← match ← state4.tryTactic (goalId := 0) convTactic with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -428,7 +435,7 @@ def test_conv: TestM Unit := do
     #[{ interiorGoal [] "b + a" with isConversion := true, userName? := .some "a" }])
 
   let convTactic := "rfl"
-  let state6_1 ← match ← state5_1.tacticOn (goalId := 0) convTactic with
+  let state6_1 ← match ← state5_1.tryTactic (goalId := 0) convTactic with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -443,7 +450,7 @@ def test_conv: TestM Unit := do
       return ()
 
   let convTactic := "rfl"
-  let state6 ← match ← state4_1.tacticOn (goalId := 0) convTactic with
+  let state6 ← match ← state4_1.tryTactic (goalId := 0) convTactic with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -458,7 +465,7 @@ def test_conv: TestM Unit := do
       return ()
 
   let tactic := "exact h"
-  let stateF ← match ← state1_1.tacticOn (goalId := 0) (tactic := tactic) with
+  let stateF ← match ← state1_1.tryTactic (goalId := 0) (tactic := tactic) with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -485,7 +492,7 @@ def test_calc: TestM Unit := 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
+  let state1 ← match ← state0.tryTactic (goalId := 0) (tactic := tactic) with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -493,7 +500,7 @@ def test_calc: TestM Unit := do
   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
+  let state2 ← match ← state1.tryCalc (goalId := 0) (pred := pred) with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -503,11 +510,11 @@ def test_calc: TestM Unit := do
       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)
+  addTest $ LSpec.test "(2.0 prev rhs)" (state2.calcPrevRhsOf? 0 |>.isNone)
+  addTest $ LSpec.test "(2.1 prev rhs)" (state2.calcPrevRhsOf? 1 |>.isSome)
 
   let tactic := "apply h1"
-  let state2m ← match ← state2.tacticOn (goalId := 0) (tactic := tactic) with
+  let state2m ← match ← state2.tryTactic (goalId := 0) (tactic := tactic) with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -518,7 +525,7 @@ def test_calc: TestM Unit := do
       addTest $ expectationFailure "continue" e
       return ()
   let pred := "_ = c + d"
-  let state4 ← match ← state3.tryCalc (state3.get! 0) (pred := pred) with
+  let state4 ← match ← state3.tryCalc (goalId := 0) (pred := pred) with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -527,9 +534,9 @@ def test_calc: TestM Unit := do
     #[
       interiorGoal [] "b + c = c + d" (.some "calc")
     ])
-  addTest $ LSpec.test "(4.0 prev rhs)" (state4.calcPrevRhsOf? (state4.get! 0) |>.isNone)
+  addTest $ LSpec.test "(4.0 prev rhs)" (state4.calcPrevRhsOf? 0 |>.isNone)
   let tactic := "apply h2"
-  let state4m ← match ← state4.tacticOn (goalId := 0) (tactic := tactic) with
+  let state4m ← match ← state4.tryTactic (goalId := 0) (tactic := tactic) with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
@@ -541,181 +548,95 @@ def test_calc: TestM Unit := do
         ("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")
+def test_let (specialized: Bool): TestM Unit := do
+  let state? ← startProof (.expr "∀ (a: Nat) (p: Prop), p → p ∨ ¬p")
   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
+  let tactic := "intro a p h"
+  let state1 ← match ← state0.tryTactic (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
+    #[interiorGoal [] "p ∨ ¬p"])
+
+
+  let letType := "Nat"
+  let expr := s!"let b: {letType} := _; _"
+  let result2 ← match specialized with
+    | true => state1.tryLet (goalId := 0) (binderName := "b") (type := letType)
+    | false => state1.tryAssign (goalId := 0) (expr := expr)
+  let state2 ← match result2 with
     | .success state => pure state
     | other => do
       addTest $ assertUnreachable $ other.toString
       return ()
-  addTest $ LSpec.check s!"mapply {recursor}" ((← state2.serializeGoals (options := ← read)).map (·.devolatilizeVars) =
+  let serializedState2 ← state2.serializeGoals (options := ← read)
+  addTest $ LSpec.check expr (serializedState2.map (·.devolatilize) =
     #[
-      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")
+      interiorGoal [] letType,
+      interiorGoal [] "let b := ?m.20;\np ∨ ¬p"
     ])
+  -- Check that the goal mvar ids match up
+  addTest $ LSpec.check expr ((serializedState2.map (·.name) |>.get! 0) = "_uniq.20")
 
-  let tactic := "exact n"
-  let state3b ← match ← state2.tacticOn (goalId := 1) (tactic := tactic) with
+  let tactic := "exact a"
+  let state3 ← match ← state2.tryTactic (goalId := 0) (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
+  addTest $ LSpec.check tactic ((← state3.serializeGoals (options := ← read)).map (·.devolatilize) = #[])
+
+  let state3r ← match state3.continue state2 with
+    | .error msg => do
+      addTest $ assertUnreachable $ msg
+      return ()
     | .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"])
+  addTest $ LSpec.check "(continue)" ((← state3r.serializeGoals (options := ← read)).map (·.devolatilize) =
+    #[interiorGoal [] "let b := a;\np ∨ ¬p"])
 
-  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 tactic := "exact h"
+  match ← state3r.tryTactic (goalId := 0) (tactic := tactic) with
+  | .failure #[message] =>
+    addTest $ LSpec.check tactic  (message = "type mismatch\n  h\nhas type\n  p : Prop\nbut is expected to have type\n  let b := a;\n  p ∨ ¬p : Prop")
+  | other => do
+    addTest $ assertUnreachable $ other.toString
 
-  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
+  let tactic := "intro b"
+  let state4 ← match ← state3r.tryTactic (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
+  let tactic := "exact Or.inl h"
+  let state5 ← match ← state4.tryTactic (goalId := 0) (tactic := tactic) 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)" },
-        }],
-      }
-    ])
+  addTest $ LSpec.test "(5 root)" state5.rootExpr?.isSome
+  where
+    interiorGoal (free: List (String × String)) (target: String) (userName?: Option String := .none) :=
+      let free := [("a", "Nat"), ("p", "Prop"), ("h", "p")] ++ free
+      buildGoal free target userName?
 
 def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
   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),
+    ("have", test_have),
     ("conv", test_conv),
     ("calc", test_calc),
-    ("Nat.zero_add", test_nat_zero_add),
-    ("Nat.zero_add alt", test_nat_zero_add_alt),
+    ("let via assign", test_let false),
+    ("let via tryLet", test_let true),
   ]
   tests.map (fun (name, test) => (name, proofRunner env test))
 

Test/Serial.lean

@@ -1,10 +1,10 @@
 import LSpec
-import Pantograph.Delate
+import Pantograph.Serial
 import Test.Common
 import Lean
 
 open Lean
-namespace Pantograph.Test.Delate
+namespace Pantograph.Test.Serial
 
 open Pantograph
 
@@ -50,9 +50,9 @@ 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))"),
+    -- This tests `autoBoundImplicit`
     ("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
@@ -64,7 +64,7 @@ def test_sexp_of_elab (env: Environment): IO LSpec.TestSeq := do
         | .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 := defaultElabContext)
+    let metaM := (Elab.Term.withLevelNames levels termElabM).run' (ctx := defaultTermElabMContext)
     return LSpec.TestSeq.append suites (← runMetaMSeq env metaM))
     LSpec.TestSeq.done
 
@@ -85,7 +85,7 @@ def test_sexp_of_expr (env: Environment): IO LSpec.TestSeq := do
     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 := defaultElabContext)
+  runMetaMSeq env $ termElabM.run' (ctx := defaultTermElabMContext)
 
 -- Instance parsing
 def test_instance (env: Environment): IO LSpec.TestSeq :=
@@ -106,4 +106,4 @@ def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
     ("Instance", test_instance env),
   ]
 
-end Pantograph.Test.Delate
+end Pantograph.Test.Serial

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

flake.lock

@@ -5,11 +5,11 @@
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1730504689,
-        "narHash": "sha256-hgmguH29K2fvs9szpq2r3pz2/8cJd2LPS+b4tfNFCwE=",
+        "lastModified": 1709336216,
+        "narHash": "sha256-Dt/wOWeW6Sqm11Yh+2+t0dfEWxoMxGBvv3JpIocFl9E=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "506278e768c2a08bec68eb62932193e341f55c90",
+        "rev": "f7b3c975cf067e56e7cda6cb098ebe3fb4d74ca2",
         "type": "github"
       },
       "original": {
@@ -18,112 +18,208 @@
         "type": "github"
       }
     },
-    "flake-parts_2": {
-      "inputs": {
-        "nixpkgs-lib": "nixpkgs-lib_2"
-      },
+    "flake-utils": {
       "locked": {
-        "lastModified": 1727826117,
-        "narHash": "sha256-K5ZLCyfO/Zj9mPFldf3iwS6oZStJcU4tSpiXTMYaaL0=",
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "rev": "3d04084d54bedc3d6b8b736c70ef449225c361b1",
+        "lastModified": 1656928814,
+        "narHash": "sha256-RIFfgBuKz6Hp89yRr7+NR5tzIAbn52h8vT6vXkYjZoM=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "7e2a3b3dfd9af950a856d66b0a7d01e3c18aa249",
         "type": "github"
       },
       "original": {
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
+        "owner": "numtide",
+        "repo": "flake-utils",
         "type": "github"
       }
     },
-    "lean4-nix": {
+    "lean": {
       "inputs": {
-        "flake-parts": "flake-parts_2",
-        "nixpkgs": "nixpkgs"
+        "flake-utils": "flake-utils",
+        "lean4-mode": "lean4-mode",
+        "nix": "nix",
+        "nixpkgs": "nixpkgs_2",
+        "nixpkgs-old": "nixpkgs-old"
       },
       "locked": {
-        "lastModified": 1731711316,
-        "narHash": "sha256-s5u+A2/Ea9gPveB5wwVM5dWW0NST6kamDsTeovGuLEs=",
-        "owner": "lenianiva",
-        "repo": "lean4-nix",
-        "rev": "136fc6057c48de970579e960b62421e9c295b67d",
+        "lastModified": 1714704934,
+        "narHash": "sha256-q0kLyIahUXolkSrBZSegPF+R99WAH1YC96JfKoFntDE=",
+        "owner": "leanprover",
+        "repo": "lean4",
+        "rev": "dcccfb73cb247e9478220375ab7de03f7c67e505",
         "type": "github"
       },
       "original": {
-        "owner": "lenianiva",
-        "repo": "lean4-nix",
+        "owner": "leanprover",
+        "ref": "v4.8.0-rc1",
+        "repo": "lean4",
+        "type": "github"
+      }
+    },
+    "lean4-mode": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1676498134,
+        "narHash": "sha256-u3WvyKxOViZG53hkb8wd2/Og6muTecbh+NdflIgVeyk=",
+        "owner": "leanprover",
+        "repo": "lean4-mode",
+        "rev": "2c6ef33f476fdf5eb5e4fa4fa023ba8b11372440",
+        "type": "github"
+      },
+      "original": {
+        "owner": "leanprover",
+        "repo": "lean4-mode",
+        "type": "github"
+      }
+    },
+    "lowdown-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1633514407,
+        "narHash": "sha256-Dw32tiMjdK9t3ETl5fzGrutQTzh2rufgZV4A/BbxuD4=",
+        "owner": "kristapsdz",
+        "repo": "lowdown",
+        "rev": "d2c2b44ff6c27b936ec27358a2653caaef8f73b8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "kristapsdz",
+        "repo": "lowdown",
         "type": "github"
       }
     },
     "lspec": {
       "flake": false,
       "locked": {
-        "lastModified": 1728279187,
-        "narHash": "sha256-ZMqbvCqR/gHXRuIkuo7b0Yp9N1vOQR7xnrcy/SeIBoQ=",
-        "owner": "argumentcomputer",
+        "lastModified": 1701971219,
+        "narHash": "sha256-HYDRzkT2UaLDrqKNWesh9C4LJNt0JpW0u68wYVj4Byw=",
+        "owner": "lurk-lab",
         "repo": "LSpec",
-        "rev": "504a8cecf8da601b9466ac727aebb6b511aae4ab",
+        "rev": "3388be5a1d1390594a74ec469fd54a5d84ff6114",
         "type": "github"
       },
       "original": {
-        "owner": "argumentcomputer",
-        "ref": "504a8cecf8da601b9466ac727aebb6b511aae4ab",
+        "owner": "lurk-lab",
+        "ref": "3388be5a1d1390594a74ec469fd54a5d84ff6114",
         "repo": "LSpec",
         "type": "github"
       }
     },
+    "nix": {
+      "inputs": {
+        "lowdown-src": "lowdown-src",
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-regression": "nixpkgs-regression"
+      },
+      "locked": {
+        "lastModified": 1657097207,
+        "narHash": "sha256-SmeGmjWM3fEed3kQjqIAO8VpGmkC2sL1aPE7kKpK650=",
+        "owner": "NixOS",
+        "repo": "nix",
+        "rev": "f6316b49a0c37172bca87ede6ea8144d7d89832f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nix",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1728500571,
-        "narHash": "sha256-dOymOQ3AfNI4Z337yEwHGohrVQb4yPODCW9MDUyAc4w=",
-        "owner": "nixos",
+        "lastModified": 1653988320,
+        "narHash": "sha256-ZaqFFsSDipZ6KVqriwM34T739+KLYJvNmCWzErjAg7c=",
+        "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "d51c28603def282a24fa034bcb007e2bcb5b5dd0",
+        "rev": "2fa57ed190fd6c7c746319444f34b5917666e5c1",
         "type": "github"
       },
       "original": {
-        "owner": "nixos",
-        "ref": "nixos-24.05",
+        "owner": "NixOS",
+        "ref": "nixos-22.05-small",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "nixpkgs-lib": {
       "locked": {
-        "lastModified": 1730504152,
-        "narHash": "sha256-lXvH/vOfb4aGYyvFmZK/HlsNsr/0CVWlwYvo2rxJk3s=",
-        "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/cc2f28000298e1269cea6612cd06ec9979dd5d7f.tar.gz"
+        "dir": "lib",
+        "lastModified": 1709237383,
+        "narHash": "sha256-cy6ArO4k5qTx+l5o+0mL9f5fa86tYUX3ozE1S+Txlds=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "1536926ef5621b09bba54035ae2bb6d806d72ac8",
+        "type": "github"
       },
       "original": {
-        "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/cc2f28000298e1269cea6612cd06ec9979dd5d7f.tar.gz"
+        "dir": "lib",
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
       }
     },
-    "nixpkgs-lib_2": {
+    "nixpkgs-old": {
+      "flake": false,
       "locked": {
-        "lastModified": 1727825735,
-        "narHash": "sha256-0xHYkMkeLVQAMa7gvkddbPqpxph+hDzdu1XdGPJR+Os=",
-        "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/fb192fec7cc7a4c26d51779e9bab07ce6fa5597a.tar.gz"
+        "lastModified": 1581379743,
+        "narHash": "sha256-i1XCn9rKuLjvCdu2UeXKzGLF6IuQePQKFt4hEKRU5oc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "34c7eb7545d155cc5b6f499b23a7cb1c96ab4d59",
+        "type": "github"
       },
       "original": {
-        "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/fb192fec7cc7a4c26d51779e9bab07ce6fa5597a.tar.gz"
+        "owner": "NixOS",
+        "ref": "nixos-19.03",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-regression": {
+      "locked": {
+        "lastModified": 1643052045,
+        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
       }
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1731386116,
-        "narHash": "sha256-lKA770aUmjPHdTaJWnP3yQ9OI1TigenUqVC3wweqZuI=",
+        "lastModified": 1686089707,
+        "narHash": "sha256-LTNlJcru2qJ0XhlhG9Acp5KyjB774Pza3tRH0pKIb3o=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "af21c31b2a1ec5d361ed8050edd0303c31306397",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1711703276,
+        "narHash": "sha256-iMUFArF0WCatKK6RzfUJknjem0H9m4KgorO/p3Dopkk=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "689fed12a013f56d4c4d3f612489634267d86529",
+        "rev": "d8fe5e6c92d0d190646fb9f1056741a229980089",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-24.05",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -131,9 +227,9 @@
     "root": {
       "inputs": {
         "flake-parts": "flake-parts",
-        "lean4-nix": "lean4-nix",
+        "lean": "lean",
         "lspec": "lspec",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs_3"
       }
     }
   },

flake.nix

@@ -2,11 +2,14 @@
   description = "Pantograph";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.05";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     flake-parts.url = "github:hercules-ci/flake-parts";
-    lean4-nix.url = "github:lenianiva/lean4-nix";
+    lean = {
+      # Do not follow input's nixpkgs since it could cause build failures
+      url = "github:leanprover/lean4?ref=v4.8.0-rc1";
+    };
     lspec = {
-      url = "github:argumentcomputer/LSpec?ref=504a8cecf8da601b9466ac727aebb6b511aae4ab";
+      url = "github:lurk-lab/LSpec?ref=3388be5a1d1390594a74ec469fd54a5d84ff6114";
       flake = false;
     };
   };
@@ -15,7 +18,7 @@
     self,
     nixpkgs,
     flake-parts,
-    lean4-nix,
+    lean,
     lspec,
     ...
   } : flake-parts.lib.mkFlake { inherit inputs; } {
@@ -26,71 +29,52 @@
       "x86_64-darwin"
     ];
     perSystem = { system, pkgs, ... }: let
-      pkgs = import nixpkgs {
-        inherit system;
-        overlays = [ (lean4-nix.readToolchainFile ./lean-toolchain) ];
-      };
-      lspecLib = pkgs.lean.buildLeanPackage {
+      leanPkgs = lean.packages.${system};
+      lspecLib = leanPkgs.buildLeanPackage {
         name = "LSpec";
         roots = [ "Main" "LSpec" ];
         src = "${lspec}";
       };
-      project = pkgs.lean.buildLeanPackage {
+      project = leanPkgs.buildLeanPackage {
         name = "Pantograph";
-        roots = [ "Pantograph" ];
-        src = pkgs.lib.cleanSource (pkgs.lib.cleanSourceWith {
+        roots = [ "Main" "Pantograph" ];
+        src = pkgs.lib.cleanSourceWith {
           src = ./.;
           filter = path: type:
             !(pkgs.lib.hasInfix "/Test/" path) &&
             !(pkgs.lib.hasSuffix ".md" path) &&
-            !(pkgs.lib.hasSuffix "Repl.lean" path);
-        });
+            !(pkgs.lib.hasSuffix "Makefile" path);
+        };
       };
-      repl = pkgs.lean.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 = pkgs.lean.buildLeanPackage {
+      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 {
+        deps = [ lspecLib project ];
+        src = pkgs.lib.cleanSourceWith {
           src = ./.;
           filter = path: type:
             !(pkgs.lib.hasInfix "Pantograph" path);
-        });
+        };
       };
     in rec {
       packages = {
-        inherit (pkgs.lean) lean lean-all;
-        inherit (project) sharedLib iTree;
-        inherit (repl) executable;
-        default = repl.executable;
-      };
-      legacyPackages = {
-        inherit project;
-        leanPkgs = pkgs.lean;
+        inherit (leanPkgs) lean lean-all;
+        inherit (project) sharedLib executable;
+        default = project.executable;
       };
       checks = {
         test = pkgs.runCommand "test" {
-          buildInputs = [ test.executable pkgs.lean.lean-all ];
+          buildInputs = [ test.executable leanPkgs.lean-all ];
         } ''
           #export LEAN_SRC_PATH="${./.}"
           ${test.executable}/bin/test > $out
         '';
       };
       devShells.default = pkgs.mkShell {
-        buildInputs = [ pkgs.lean.lean-all pkgs.lean.lean ];
+        buildInputs = [ leanPkgs.lean-all leanPkgs.lean ];
       };
     };
   };

lake-manifest.json

@@ -1,14 +1,13 @@
-{"version": "1.1.0",
+{"version": 7,
  "packagesDir": ".lake/packages",
  "packages":
- [{"url": "https://github.com/lenianiva/LSpec.git",
+ [{"url": "https://github.com/lurk-lab/LSpec.git",
    "type": "git",
    "subDir": null,
-   "scope": "",
-   "rev": "c492cecd0bc473e2f9c8b94d545d02cc0056034f",
+   "rev": "3388be5a1d1390594a74ec469fd54a5d84ff6114",
    "name": "LSpec",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "c492cecd0bc473e2f9c8b94d545d02cc0056034f",
+   "inputRev": "3388be5a1d1390594a74ec469fd54a5d84ff6114",
    "inherited": false,
    "configFile": "lakefile.lean"}],
  "name": "pantograph",

lakefile.lean

@@ -4,26 +4,22 @@ 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" @ "3388be5a1d1390594a74ec469fd54a5d84ff6114"
 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:v4.8.0-rc1