Documentation

Lean.Meta.Tactic.Cleanup

@[inline, reducible]
abbrev Lean.MVarId.cleanup (mvarId : Lean.MVarId) (toPreserve : optParam (Array Lean.FVarId) #[]) (indirectProps : optParam Bool true) :

Auxiliary tactic for cleaning the local context. It removes local declarations (aka hypotheses) that are not relevant. We say a variable x is "relevant" if

  • It occurs in the toPreserve array, or
  • It occurs in the target type, or
  • There is a relevant variable y that depends on x, or
  • If indirectProps is true, the type of x is a proposition and it depends on a relevant variable y.

By default, toPreserve := #[] and indirectProps := true. These settings are used in the mathlib tactic extract_goal to give the user more control over which variables to include.

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    @[inline, reducible, deprecated Lean.MVarId.cleanup]
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