A very simple try? tactic implementation.

def Lean.Elab.Tactic.elabTryConfig : Syntax → TacticM Try.Config

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evalSuggest is a evalTactic variant that returns suggestions after executing a tactic built using combinatiors such as first, attempt_all, <;>, ;, and try.

def Lean.Elab.Tactic.Try.checkTactic (savedState : SavedState) (tac : TSyntax `tactic) : TacticM Unit

Executes tac in the saved state. This function is used to validate a tactic before suggesting it.

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• Lean.Elab.Tactic.Try.checkTactic savedState tac = do let currState ← Lean.saveState savedState.restore tryFinally (Lean.Elab.Tactic.evalTactic tac.raw) currState.restore

def Lean.Elab.Tactic.Try.evalSuggestExact : TacticM (TSyntax `tactic)

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@[reducible, inline]

abbrev Lean.Elab.Tactic.Try.TacticResult (α : Type) : Type

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• Lean.Elab.Tactic.Try.TacticResult α = EStateM.Result Lean.Exception Lean.Elab.Tactic.SavedState α

structure Lean.Elab.Tactic.Try.Ctx : Type

• root : TSyntax `tactic
• terminal : Bool
• config : Try.Config

@[reducible, inline]

abbrev Lean.Elab.Tactic.Try.M (α : Type) : Type

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• Lean.Elab.Tactic.Try.M = ReaderT Lean.Elab.Tactic.Try.Ctx Lean.Elab.Tactic.TacticM

Instances For

• Lean.Elab.Tactic.Try.instMonadBacktrackSavedStateM

instance Lean.Elab.Tactic.Try.instMonadBacktrackSavedStateM : MonadBacktrack SavedState M

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@[reducible, inline]

abbrev Lean.Elab.Tactic.Try.withNonTerminal {α : Type} (x : M α) : M α

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• Lean.Elab.Tactic.Try.withNonTerminal x = withReader (fun (c : Lean.Elab.Tactic.Try.Ctx) => { root := c.root, terminal := false, config := c.config }) x

@[reducible, inline]

abbrev Lean.Elab.Tactic.Try.focus {α : Type} (x : M α) : M α

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• Lean.Elab.Tactic.Try.focus x ctx = Lean.Elab.Tactic.focus (x ctx)

def Lean.Elab.Tactic.Try.observing {α : Type} (x : M α) : M (TacticResult α)

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@[extern lean_eval_suggest_tactic]

opaque Lean.Elab.Tactic.Try.evalSuggest (tac : TSyntax `tactic) : M (TSyntax `tactic)

evalAndSuggest frontend

def Lean.Elab.Tactic.Try.evalAndSuggest (tk : Syntax) (tac : TSyntax `tactic) (config : Try.Config := { }) : TacticM Unit

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Helper functions

grind tactic syntax generator based on collected information.

Other generators

Function induction generators

Main code

def Lean.Elab.Tactic.Try.evalTryTrace : Tactic

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