feat: Expose `GoalState` functions

Pantograph.lean

@@ -164,7 +164,7 @@ def execute (command: Protocol.Command): MainM Lean.Json := do
         | .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
+          | .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"

Pantograph/Goal.lean

@@ -39,15 +39,15 @@ protected def GoalState.create (expr: Expr): Elab.TermElabM GoalState := do
 
   --Elab.Term.synthesizeSyntheticMVarsNoPostponing
   --let expr ← instantiateMVars expr
-  let goal ← Meta.mkFreshExprMVar expr (kind := MetavarKind.synthetic) (userName := .anonymous)
+  let root ← Meta.mkFreshExprMVar expr (kind := MetavarKind.synthetic) (userName := .anonymous)
   let savedStateMonad: Elab.Tactic.TacticM Elab.Tactic.SavedState := MonadBacktrack.saveState
-  let root := goal.mvarId!
+  let savedState ← savedStateMonad { elaborator := .anonymous } |>.run' { goals := [root.mvarId!]}
-  let savedState ← savedStateMonad { elaborator := .anonymous } |>.run' { goals := [root]}
   return {
-    root,
+    root := root.mvarId!,
     savedState,
     parentMVar? := .none,
   }
+@[export pantograph_goal_state_is_conv]
 protected def GoalState.isConv (state: GoalState): Bool :=
   state.convMVar?.isSome
 protected def GoalState.goals (state: GoalState): List MVarId :=
@@ -56,6 +56,7 @@ protected def GoalState.goals (state: GoalState): List MVarId :=
 protected def GoalState.goalsArray (state: GoalState): Array MVarId := state.goals.toArray
 protected def GoalState.mctx (state: GoalState): MetavarContext :=
   state.savedState.term.meta.meta.mctx
+@[export pantograph_goal_state_env]
 protected def GoalState.env (state: GoalState): Environment :=
   state.savedState.term.meta.core.env
 
@@ -85,7 +86,7 @@ private def GoalState.restoreTacticM (state: GoalState) (goal: MVarId): Elab.Tac
   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 {
@@ -121,6 +122,7 @@ protected def GoalState.resume (state: GoalState) (goals: List MVarId): Except S
 /--
 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"

Pantograph/Library.lean

@@ -134,10 +134,6 @@ def goalStartExpr (expr: String) (levels: Array String): CoreM (Protocol.CR Goal
 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
@@ -189,8 +185,5 @@ def goalConvExit (state: GoalState): CoreM TacticResult :=
 @[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
 
 end Pantograph