val normalize_tac: pattern:ProofEngineTypes.pattern -> ProofEngineTypes.tactic
val fold_tac:
- reduction:(Cic.context -> Cic.term -> Cic.term) ->
+ reduction:(Cic.context -> Cic.term -> Cic.term) -> term:Cic.term ->
pattern:ProofEngineTypes.pattern -> ProofEngineTypes.tactic