def Lean.Elab.admitGoal (mvarId : Lean.MVarId) : Lean.MetaM Unit

Assign mvarId := sorry

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def Lean.Elab.goalsToMessageData (goals : List Lean.MVarId) : Lean.MessageData

Equations

• Lean.Elab.goalsToMessageData goals = Lean.MessageData.joinSep (List.map Lean.MessageData.ofGoal goals) (Lean.toMessageData "\n\n")

def Lean.Elab.Term.reportUnsolvedGoals (goals : List Lean.MVarId) : Lean.MetaM Unit

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structure Lean.Elab.Tactic.Context : Type

• elaborator : Lake.Name

  Declaration name of the executing elaborator, used by mkTacticInfo to persist it in the info tree

• recover : Bool

  If true, enable "error recovery" in some tactics. For example, cases tactic admits unsolved alternatives when recover == true. The combinator withoutRecover disables "error recovery" while executing . This is useful for tactics such as first | ... | ....

structure Lean.Elab.Tactic.SavedState : Type

• term : Lean.Elab.Term.SavedState
• tactic : Lean.Elab.Tactic.State

@[inline, reducible]

abbrev Lean.Elab.Tactic.TacticM (α : Type) : Type

Equations

• Lean.Elab.Tactic.TacticM = ReaderT Lean.Elab.Tactic.Context (StateRefT' IO.RealWorld Lean.Elab.Tactic.State Lean.Elab.TermElabM)

@[inline, reducible]

abbrev Lean.Elab.Tactic.Tactic : Type

Equations

• Lean.Elab.Tactic.Tactic = (Lean.Syntax → Lean.Elab.Tactic.TacticM Unit)

@[always_inline]

instance Lean.Elab.Tactic.instMonadTacticM : Monad Lean.Elab.Tactic.TacticM

Equations

• Lean.Elab.Tactic.instMonadTacticM = let i := inferInstanceAs (Monad Lean.Elab.Tactic.TacticM); Monad.mk

def Lean.Elab.Tactic.getGoals : Lean.Elab.Tactic.TacticM (List Lean.MVarId)

Equations

• Lean.Elab.Tactic.getGoals = do let __do_lift ← get pure __do_lift.goals

def Lean.Elab.Tactic.setGoals (mvarIds : List Lean.MVarId) : Lean.Elab.Tactic.TacticM Unit

Equations

• Lean.Elab.Tactic.setGoals mvarIds = modify fun x => { goals := mvarIds }

def Lean.Elab.Tactic.pruneSolvedGoals : Lean.Elab.Tactic.TacticM Unit

Equations

• Lean.Elab.Tactic.pruneSolvedGoals = do let gs ← Lean.Elab.Tactic.getGoals let gs ← List.filterM (fun g => not <$> Lean.MVarId.isAssigned g) gs Lean.Elab.Tactic.setGoals gs

def Lean.Elab.Tactic.getUnsolvedGoals : Lean.Elab.Tactic.TacticM (List Lean.MVarId)

Equations

• Lean.Elab.Tactic.getUnsolvedGoals = do Lean.Elab.Tactic.pruneSolvedGoals Lean.Elab.Tactic.getGoals

def Lean.Elab.Tactic.run (mvarId : Lean.MVarId) (x : Lean.Elab.Tactic.TacticM Unit) : Lean.Elab.TermElabM (List Lean.MVarId)

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def Lean.Elab.Tactic.saveState : Lean.Elab.Tactic.TacticM Lean.Elab.Tactic.SavedState

Equations

• Lean.Elab.Tactic.saveState = do let __do_lift ← liftM Lean.Elab.Term.saveState let __do_lift_1 ← get pure { term := __do_lift, tactic := __do_lift_1 }

def Lean.Elab.Tactic.SavedState.restore (b : Lean.Elab.Tactic.SavedState) (restoreInfo : optParam Bool false) : Lean.Elab.Tactic.TacticM Unit

Equations

• Lean.Elab.Tactic.SavedState.restore b restoreInfo = do liftM (Lean.Elab.Term.SavedState.restore b.term restoreInfo) set b.tactic

def Lean.Elab.Tactic.getCurrMacroScope : Lean.Elab.Tactic.TacticM Lean.MacroScope

Equations

• Lean.Elab.Tactic.getCurrMacroScope = do let __do_lift ← readThe Lean.Core.Context pure __do_lift.currMacroScope

def Lean.Elab.Tactic.getMainModule : Lean.Elab.Tactic.TacticM Lake.Name

Equations

• Lean.Elab.Tactic.getMainModule = do let __do_lift ← Lean.getEnv pure (Lean.Environment.mainModule __do_lift)

unsafe def Lean.Elab.Tactic.mkTacticAttribute : IO (Lean.KeyedDeclsAttribute Lean.Elab.Tactic.Tactic)

Equations

• Lean.Elab.Tactic.mkTacticAttribute = Lean.Elab.mkElabAttribute Lean.Elab.Tactic.Tactic `builtin_tactic `tactic `Lean.Parser.Tactic `Lean.Elab.Tactic.Tactic "tactic"

opaque Lean.Elab.Tactic.tacticElabAttribute : Lean.KeyedDeclsAttribute Lean.Elab.Tactic.Tactic

def Lean.Elab.Tactic.mkTacticInfo (mctxBefore : Lean.MetavarContext) (goalsBefore : List Lean.MVarId) (stx : Lean.Syntax) : Lean.Elab.Tactic.TacticM Lean.Elab.Info

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def Lean.Elab.Tactic.mkInitialTacticInfo (stx : Lean.Syntax) : Lean.Elab.Tactic.TacticM (Lean.Elab.Tactic.TacticM Lean.Elab.Info)

Equations

• Lean.Elab.Tactic.mkInitialTacticInfo stx = do let mctxBefore ← Lean.getMCtx let goalsBefore ← Lean.Elab.Tactic.getUnsolvedGoals pure (Lean.Elab.Tactic.mkTacticInfo mctxBefore goalsBefore stx)

@[inline]

def Lean.Elab.Tactic.withTacticInfoContext {α : Type} (stx : Lean.Syntax) (x : Lean.Elab.Tactic.TacticM α) : Lean.Elab.Tactic.TacticM α

Equations

• Lean.Elab.Tactic.withTacticInfoContext stx x = do let __do_lift ← Lean.Elab.Tactic.mkInitialTacticInfo stx Lean.Elab.withInfoContext x __do_lift

Important: we must define evalTactic before we define the instance MonadExcept for TacticM since it backtracks the state including error messages, and this is bad when rethrowing the exception at the catch block in these methods. We marked these places with a (*) in these methods.

structure Lean.Elab.Tactic.EvalTacticFailure : Type

• exception : Lean.Exception
• state : Lean.Elab.Tactic.SavedState

Auxiliary datastructure for capturing exceptions at evalTactic.

partial def Lean.Elab.Tactic.evalTactic (stx : Lean.Syntax) : Lean.Elab.Tactic.TacticM Unit

def Lean.Elab.Tactic.evalTactic.throwExs (stx : Lean.Syntax) (failures : Array Lean.Elab.Tactic.EvalTacticFailure) : Lean.Elab.Tactic.TacticM Unit

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@[inline]

def Lean.Elab.Tactic.evalTactic.handleEx (s : Lean.Elab.Tactic.SavedState) (failures : Array Lean.Elab.Tactic.EvalTacticFailure) (ex : Lean.Exception) (k : Array Lean.Elab.Tactic.EvalTacticFailure → Lean.Elab.Tactic.TacticM Unit) : Lean.Elab.Tactic.TacticM Unit

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partial def Lean.Elab.Tactic.evalTactic.expandEval (stx : Lean.Syntax) (s : Lean.Elab.Tactic.SavedState) (macros : List (Lean.KeyedDeclsAttribute.AttributeEntry Lean.Macro)) (evalFns : List (Lean.KeyedDeclsAttribute.AttributeEntry Lean.Elab.Tactic.Tactic)) (failures : Array Lean.Elab.Tactic.EvalTacticFailure) : Lean.Elab.Tactic.TacticM Unit

partial def Lean.Elab.Tactic.evalTactic.eval (stx : Lean.Syntax) (s : Lean.Elab.Tactic.SavedState) (evalFns : List (Lean.KeyedDeclsAttribute.AttributeEntry Lean.Elab.Tactic.Tactic)) (failures : Array Lean.Elab.Tactic.EvalTacticFailure) : Lean.Elab.Tactic.TacticM Unit

def Lean.Elab.Tactic.throwNoGoalsToBeSolved {α : Type} : Lean.Elab.Tactic.TacticM α

Equations

• Lean.Elab.Tactic.throwNoGoalsToBeSolved = Lean.throwError (Lean.toMessageData "no goals to be solved")

def Lean.Elab.Tactic.done : Lean.Elab.Tactic.TacticM Unit

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def Lean.Elab.Tactic.focus {α : Type} (x : Lean.Elab.Tactic.TacticM α) : Lean.Elab.Tactic.TacticM α

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def Lean.Elab.Tactic.focusAndDone {α : Type} (tactic : Lean.Elab.Tactic.TacticM α) : Lean.Elab.Tactic.TacticM α

Equations

• Lean.Elab.Tactic.focusAndDone tactic = Lean.Elab.Tactic.focus do let a ← tactic Lean.Elab.Tactic.done pure a

def Lean.Elab.Tactic.closeUsingOrAdmit (tac : Lean.Elab.Tactic.TacticM Unit) : Lean.Elab.Tactic.TacticM Unit

Close the main goal using the given tactic. If it fails, log the error and admit

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instance Lean.Elab.Tactic.instMonadBacktrackSavedStateTacticM : Lean.MonadBacktrack Lean.Elab.Tactic.SavedState Lean.Elab.Tactic.TacticM

Equations

• Lean.Elab.Tactic.instMonadBacktrackSavedStateTacticM = { saveState := Lean.Elab.Tactic.saveState, restoreState := fun b => Lean.Elab.Tactic.SavedState.restore b false }

@[inline]

def Lean.Elab.Tactic.tryCatch {α : Type} (x : Lean.Elab.Tactic.TacticM α) (h : Lean.Exception → Lean.Elab.Tactic.TacticM α) : Lean.Elab.Tactic.TacticM α

Equations

• Lean.Elab.Tactic.tryCatch x h = do let b ← Lean.saveState tryCatch x fun ex => do Lean.Elab.Tactic.SavedState.restore b false h ex

instance Lean.Elab.Tactic.instMonadExceptExceptionTacticM : MonadExcept Lean.Exception Lean.Elab.Tactic.TacticM

Equations

• Lean.Elab.Tactic.instMonadExceptExceptionTacticM = { throw := fun {α} => throw, tryCatch := fun {α} => Lean.Elab.Tactic.tryCatch }

def Lean.Elab.Tactic.withoutRecover {α : Type} (x : Lean.Elab.Tactic.TacticM α) : Lean.Elab.Tactic.TacticM α

Execute x with error recovery disabled

Equations

• Lean.Elab.Tactic.withoutRecover x = withReader (fun ctx => { elaborator := ctx.elaborator, recover := false }) x

@[inline]

def Lean.Elab.Tactic.orElse {α : Type} (x : Lean.Elab.Tactic.TacticM α) (y : Unit → Lean.Elab.Tactic.TacticM α) : Lean.Elab.Tactic.TacticM α

Equations

• Lean.Elab.Tactic.orElse x y = tryCatch (Lean.Elab.Tactic.withoutRecover x) fun x => y ()

instance Lean.Elab.Tactic.instOrElseTacticM {α : Type} : OrElse (Lean.Elab.Tactic.TacticM α)

Equations

• Lean.Elab.Tactic.instOrElseTacticM = { orElse := Lean.Elab.Tactic.orElse }

instance Lean.Elab.Tactic.instAlternativeTacticM : Alternative Lean.Elab.Tactic.TacticM

Equations

• Lean.Elab.Tactic.instAlternativeTacticM = Alternative.mk (fun {x} => Lean.throwError (Lean.toMessageData "failed")) fun {α} => Lean.Elab.Tactic.orElse

def Lean.Elab.Tactic.saveTacticInfoForToken (stx : Lean.Syntax) : Lean.Elab.Tactic.TacticM Unit

Save the current tactic state for a token stx. This method is a no-op if stx has no position information. We use this method to save the tactic state at punctuation such as ;

Equations

• Lean.Elab.Tactic.saveTacticInfoForToken stx = if Option.isNone (Lean.Syntax.getPos? stx) = true then pure PUnit.unit else Lean.Elab.Tactic.withTacticInfoContext stx (pure ())

@[inline]

def Lean.Elab.Tactic.withMacroExpansion {α : Type} (beforeStx : Lean.Syntax) (afterStx : Lean.Syntax) (x : Lean.Elab.Tactic.TacticM α) : Lean.Elab.Tactic.TacticM α

Elaborate x with stx on the macro stack

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def Lean.Elab.Tactic.adaptExpander (exp : Lean.Syntax → Lean.Elab.Tactic.TacticM Lean.Syntax) : Lean.Elab.Tactic.Tactic

Adapt a syntax transformation to a regular tactic evaluator.

Equations

• Lean.Elab.Tactic.adaptExpander exp stx = do let stx' ← exp stx Lean.Elab.Tactic.withMacroExpansion stx stx' (Lean.Elab.Tactic.evalTactic stx')

def Lean.Elab.Tactic.appendGoals (mvarIds : List Lean.MVarId) : Lean.Elab.Tactic.TacticM Unit

Add the given goals at the end of the current goals collection.

Equations

• Lean.Elab.Tactic.appendGoals mvarIds = modify fun s => { goals := s.goals ++ mvarIds }

def Lean.Elab.Tactic.replaceMainGoal (mvarIds : List Lean.MVarId) : Lean.Elab.Tactic.TacticM Unit

Discard the first goal and replace it by the given list of goals, keeping the other goals.

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def Lean.Elab.Tactic.getMainGoal : Lean.Elab.Tactic.TacticM Lean.MVarId

Return the first goal.

Equations

• Lean.Elab.Tactic.getMainGoal = do let __do_lift ← Lean.Elab.Tactic.getGoals Lean.Elab.Tactic.getMainGoal.loop __do_lift

def Lean.Elab.Tactic.getMainGoal.loop : List Lean.MVarId → Lean.Elab.Tactic.TacticM Lean.MVarId

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• One or more equations did not get rendered due to their size.
• Lean.Elab.Tactic.getMainGoal.loop [] = Lean.Elab.Tactic.throwNoGoalsToBeSolved

def Lean.Elab.Tactic.getMainDecl : Lean.Elab.Tactic.TacticM Lean.MetavarDecl

Return the main goal metavariable declaration.

Equations

• Lean.Elab.Tactic.getMainDecl = do let __do_lift ← Lean.Elab.Tactic.getMainGoal liftM (Lean.MVarId.getDecl __do_lift)

def Lean.Elab.Tactic.getMainTag : Lean.Elab.Tactic.TacticM Lake.Name

Return the main goal tag.

Equations

• Lean.Elab.Tactic.getMainTag = do let __do_lift ← Lean.Elab.Tactic.getMainDecl pure __do_lift.userName

def Lean.Elab.Tactic.getMainTarget : Lean.Elab.Tactic.TacticM Lean.Expr

Return expected type for the main goal.

Equations

• Lean.Elab.Tactic.getMainTarget = do let __do_lift ← Lean.Elab.Tactic.getMainDecl Lean.instantiateMVars __do_lift.type

def Lean.Elab.Tactic.withMainContext {α : Type} (x : Lean.Elab.Tactic.TacticM α) : Lean.Elab.Tactic.TacticM α

Execute x using the main goal local context and instances

Equations

• Lean.Elab.Tactic.withMainContext x = do let __do_lift ← Lean.Elab.Tactic.getMainGoal Lean.MVarId.withContext __do_lift x

def Lean.Elab.Tactic.evalTacticAt (tac : Lean.Syntax) (mvarId : Lean.MVarId) : Lean.Elab.Tactic.TacticM (List Lean.MVarId)

Evaluate tac at mvarId, and return the list of resulting subgoals.

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def Lean.Elab.Tactic.ensureHasNoMVars (e : Lean.Expr) : Lean.Elab.Tactic.TacticM Unit

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def Lean.Elab.Tactic.closeMainGoal (val : Lean.Expr) (checkUnassigned : optParam Bool true) : Lean.Elab.Tactic.TacticM Unit

Close main goal using the given expression. If checkUnassigned == true, then val must not contain unassigned metavariables.

Equations

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@[inline]

def Lean.Elab.Tactic.liftMetaMAtMain {α : Type} (x : Lean.MVarId → Lean.MetaM α) : Lean.Elab.Tactic.TacticM α

Equations

• Lean.Elab.Tactic.liftMetaMAtMain x = Lean.Elab.Tactic.withMainContext do let __do_lift ← Lean.Elab.Tactic.getMainGoal liftM (x __do_lift)

@[inline]

def Lean.Elab.Tactic.liftMetaTacticAux {α : Type} (tac : Lean.MVarId → Lean.MetaM (α × List Lean.MVarId)) : Lean.Elab.Tactic.TacticM α

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@[inline]

def Lean.Elab.Tactic.liftMetaTactic (tactic : Lean.MVarId → Lean.MetaM (List Lean.MVarId)) : Lean.Elab.Tactic.TacticM Unit

Get the mvarid of the main goal, run the given tactic, then set the new goals to be the resulting goal list.

Equations

• Lean.Elab.Tactic.liftMetaTactic tactic = Lean.Elab.Tactic.liftMetaTacticAux fun mvarId => do let gs ← tactic mvarId pure ((), gs)

@[inline]

def Lean.Elab.Tactic.liftMetaTactic1 (tactic : Lean.MVarId → Lean.MetaM (Option Lean.MVarId)) : Lean.Elab.Tactic.TacticM Unit

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def Lean.Elab.Tactic.tryTactic? {α : Type} (tactic : Lean.Elab.Tactic.TacticM α) : Lean.Elab.Tactic.TacticM (Option α)

Equations

• Lean.Elab.Tactic.tryTactic? tactic = tryCatch (do let __do_lift ← tactic pure (some __do_lift)) fun x => pure none

def Lean.Elab.Tactic.tryTactic {α : Type} (tactic : Lean.Elab.Tactic.TacticM α) : Lean.Elab.Tactic.TacticM Bool

Equations

• Lean.Elab.Tactic.tryTactic tactic = tryCatch (do discard tactic pure true) fun x => pure false

def Lean.Elab.Tactic.tagUntaggedGoals (parentTag : Lake.Name) (newSuffix : Lake.Name) (newGoals : List Lean.MVarId) : Lean.Elab.Tactic.TacticM Unit

Use parentTag to tag untagged goals at newGoals. If there are multiple new untagged goals, they are named using ._ where idx > 0. If there is only one new untagged goal, then we just use parentTag

Equations

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def Lean.Elab.Tactic.getNameOfIdent' (id : Lean.Syntax) : Lake.Name

Equations

• Lean.Elab.Tactic.getNameOfIdent' id = if Lean.Syntax.isIdent id = true then Lean.Syntax.getId id else `_

def Lean.Elab.Tactic.withCaseRef {m : Type → Type} {α : Type} [Monad m] [Lean.MonadRef m] (arrow : Lean.Syntax) (body : Lean.Syntax) (x : m α) : m α

Use position of => $body for error messages. If there is a line break before body, the message will be displayed on => only, but the "full range" for the info view will still include body.

Equations

• Lean.Elab.Tactic.withCaseRef arrow body x = Lean.withRef (Lean.mkNullNode #[arrow, body]) x