erw? — Mathlib

Lean4
/-- `erw? [r, ...]` calls `erw [r, ...]` (at hypothesis `h` if written `erw [r, ...] at h`),
and then attempts to identify any subexpression which would block the use of `rw` instead.
It does so by identifying subexpressions which are defeq, but not at reducible transparency.
-/
@[tactic_parser 1000]
public meta def erw? : Lean.ParserDescr✝ :=
  ParserDescr.node✝ `Mathlib.Tactic.Erw?.erw? 1022
    (ParserDescr.binary✝ `andthen
      (ParserDescr.binary✝ `andthen (ParserDescr.nonReservedSymbol✝ "erw? " false✝) Lean.Parser.Tactic.rwRuleSeq)
      (ParserDescr.unary✝ `optional Lean.Parser.Tactic.location))
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