feat: Print inductives in env.inspect

Pantograph/Environment.lean

@@ -43,9 +43,9 @@ def inspect (args: Protocol.EnvInspect) (options: Protocol.Options): CoreM (CR P
   let env ← Lean.MonadEnv.getEnv
   let name :=  args.name.toName
   let info? := env.find? name
-  match info? with
+  let info ← match info? with
     | none => return .error $ Protocol.errorIndex s!"Symbol not found {args.name}"
-  | some info =>
+    | some info => pure info
   let module? := env.getModuleIdxFor? name >>=
     (λ idx => env.allImportedModuleNames.get? idx.toNat) |>.map toString
   let value? := match args.value?, info with
@@ -53,7 +53,8 @@ def inspect (args: Protocol.EnvInspect) (options: Protocol.Options): CoreM (CR P
     | .some false, _ => .none
     | .none, .defnInfo _ => info.value?
     | .none, _ => .none
-    return .ok {
+  -- Information common to all symbols
+  let core := {
     type := ← (serialize_expression options info.type).run',
     value? := ← value?.mapM (λ v => serialize_expression options v |>.run'),
     publicName? := Lean.privateToUserName? name |>.map (·.toString),
@@ -62,6 +63,19 @@ def inspect (args: Protocol.EnvInspect) (options: Protocol.Options): CoreM (CR P
     valueDependency? := if args.dependency?.getD false then info.value?.map (·.getUsedConstants.map (λ n => name_to_ast n)) else .none,
     module? := module?
   }
+  let result := match info with
+    | .inductInfo induct => { core with inductInfo? := .some {
+          numParams := induct.numParams,
+          numIndices := induct.numIndices,
+          all := induct.all.map (·.toString),
+          ctors := induct.ctors.map (·.toString),
+          isRec := induct.isRec,
+          isUnsafe := induct.isUnsafe,
+          isReflexive := induct.isReflexive,
+          isNested := induct.isNested,
+      } }
+    | _ => core
+  return .ok result
 def addDecl (args: Protocol.EnvAdd): CoreM (CR Protocol.EnvAddResult) := do
   let env ← Lean.MonadEnv.getEnv
   let tvM: Elab.TermElabM (Except String (Expr × Expr)) := do

Pantograph/Protocol.lean

@@ -110,6 +110,7 @@ structure EnvCatalog where
 structure EnvCatalogResult where
   symbols: Array String
   deriving Lean.ToJson
+
 -- Print the type of a symbol
 structure EnvInspect where
   name: String
@@ -119,6 +120,17 @@ structure EnvInspect where
   -- If true, show the type and value dependencies
   dependency?: Option Bool := .some false
   deriving Lean.FromJson
+-- See `InductiveVal`
+structure InductInfo where
+  numParams: Nat
+  numIndices: Nat
+  all: List String
+  ctors: List String
+  isRec:       Bool := false
+  isUnsafe:    Bool := false
+  isReflexive: Bool := false
+  isNested:    Bool := false
+  deriving Lean.ToJson
 structure EnvInspectResult where
   type: Expression
   value?: Option Expression := .none
@@ -127,7 +139,9 @@ structure EnvInspectResult where
   publicName?: Option String := .none
   typeDependency?: Option (Array String) := .none
   valueDependency?: Option (Array String) := .none
+  inductInfo?: Option InductInfo := .none
   deriving Lean.ToJson
+
 structure EnvAdd where
   name: String
   type: String

Test/Environment.lean

@@ -1,12 +1,16 @@
 import LSpec
 import Pantograph.Serial
 import Pantograph.Environment
+import Test.Common
 
 namespace Pantograph.Test.Environment
 
 open Pantograph
 open Lean
 
+deriving instance DecidableEq, Repr for Protocol.InductInfo
+deriving instance DecidableEq, Repr for Protocol.EnvInspectResult
+
 def test_symbol_visibility (env: Environment): IO LSpec.TestSeq := do
   let entries: List (Name × Bool) := [
     ("Nat.add_comm".toName, false),
@@ -18,6 +22,22 @@ def test_symbol_visibility (env: Environment): IO LSpec.TestSeq := do
     LSpec.TestSeq.append suites test) LSpec.TestSeq.done
   return suite
 
+def test_inspect (env: Environment): IO LSpec.TestSeq := do
+  let inner: CoreM LSpec.TestSeq := do
+    let args: Protocol.EnvInspect := { name := "Or" }
+    let result ← match ← Environment.inspect args (options := {}) with
+      | .ok result => pure $ result
+      | .error e => panic! s!"Error: {e.desc}"
+    --IO.println s!"{reprStr result.inductInfo?}"
+    let test := LSpec.check "Or" (result.inductInfo? == .some {
+      numParams := 2,
+      numIndices := 0,
+      all := ["Or"],
+      ctors := ["Or.inl", "Or.inr"],
+    })
+    return LSpec.TestSeq.append LSpec.TestSeq.done test
+  runCoreMSeq env inner
+
 def suite: IO LSpec.TestSeq := do
   let env: Environment ← importModules
     (imports := #["Init"].map (λ str => { module := str.toName, runtimeOnly := false }))
@@ -25,6 +45,7 @@ def suite: IO LSpec.TestSeq := do
     (trustLevel := 1)
 
   return LSpec.group "Environment" $
-    (LSpec.group "Symbol visibility" (← test_symbol_visibility env))
+    (LSpec.group "Symbol visibility" (← test_symbol_visibility env)) ++
+    (LSpec.group "Inspect" (← test_inspect env))
 
 end Pantograph.Test.Environment