`applyLocTactic`🔗

Definition

Apply a given transformation to all goals and/or hypotheses specified by a Location.

def

applyLocTactic (loc : Lean.Elab.Tactic.Location)
  (transform : Lean.Expr → Lean.MetaM (Lean.Expr × Lean.Expr)) :
  Lean.Elab.Tactic.TacticM Unit
applyLocTactic
  (loc : Lean.Elab.Tactic.Location)
  (transform :
    Lean.Expr →
      Lean.MetaM
        (Lean.Expr × Lean.Expr)) :
  Lean.Elab.Tactic.TacticM Unit

Code

def applyLocTactic (loc : Location) (transform : Expr → MetaM (Expr × Expr)) :
    TacticM Unit := do
  match loc with
  | Location.targets hyps target =>
    for hyp in hyps do
      let hFVarId ← getFVarId hyp
      let newGoal ← replaceEquality (← getMainGoal) (some hFVarId) transform
      replaceMainGoal [newGoal]
    if target then
      let newGoal ← replaceEquality (← getMainGoal) none transform
      replaceMainGoal [newGoal]
  | Location.wildcard =>
    let goal ← getMainGoal
    goal.withContext do
      let lctx ← getLCtx
      let mut currentGoal := goal
      for decl in lctx do
        if decl.isImplementationDetail then continue
        try
          currentGoal ← replaceEquality currentGoal (some decl.fvarId) transform
          replaceMainGoal [currentGoal]
        catch _ => continue
      try
        currentGoal ← replaceEquality currentGoal none transform
        replaceMainGoal [currentGoal]
      catch _ => pure ()

Actions: Source · Open Issue

Meaning last changed in v4.34.0-rc2-1-g439785b (2026-08-23).

Self-contained, with its dependencies inlined and proofs replaced by sorry: download the raw file · open it in the Lean web editor.

Dependency graph

Audit surface: 1 project declarations, 102 external constants

✓ Proved: no sorry anywhere in its closure

This is the tool's own reading of one build's recorded axioms, and it is not robust against an author who wants it to pass. Checking meant to be relied on should go through Comparator, which replays the proof through the kernel from an export against an explicit list of permitted axioms.

applyLocTactic🔗

`applyLocTactic`🔗