Find_subtermFinding subterms, possibly up to some unification function, possibly at some given occurrences
exception NotUnifiable of (EConstr.constr * EConstr.constr * Pretype_errors.unification_error) optionexception SubtermUnificationError of Pretype_errors.subterm_unification_errorA testing function is typically a unification function returning a substitution or failing with a NotUnifiable error, together with a function to merge substitutions and an initial substitution; last_found is used for error messages and it has to be initialized with None.
type 'a testing_function = {match_fun : 'a -> EConstr.constr -> 'a; |
merge_fun : 'a -> 'a -> 'a; |
mutable testing_state : 'a; |
mutable last_found : Pretype_errors.position_reporting option; |
}val make_eq_univs_test : Environ.env -> Evd.evar_map -> EConstr.constr -> Evd.evar_map testing_functionThis is the basic testing function, looking for exact matches of a closed term
val replace_term_occ_modulo : Environ.env -> Evd.evar_map -> Locus.occurrences Locus.or_like_first -> 'a testing_function -> (unit -> EConstr.constr) -> EConstr.constr -> EConstr.constrreplace_term_occ_modulo occl test mk c looks in c for subterm modulo a testing function test and replaces successfully matching subterms at the indicated occurrences occl with mk
(); it turns a NotUnifiable exception raised by the testing function into a SubtermUnificationError.
val replace_term_occ_decl_modulo : Environ.env -> Evd.evar_map -> (Locus.occurrences * Locus.hyp_location_flag) Locus.or_like_first -> 'a testing_function -> (unit -> EConstr.constr) -> EConstr.named_declaration -> EConstr.named_declarationreplace_term_occ_decl_modulo is similar to replace_term_occ_modulo but for a named_declaration.
val subst_closed_term_occ : Environ.env -> Evd.evar_map -> Locus.occurrences Locus.or_like_first -> EConstr.constr -> EConstr.constr -> EConstr.constr * Evd.evar_mapsubst_closed_term_occ occl c d replaces occurrences of closed c at positions occl by Rel 1 in d (see also Note OCC), unifying universes which results in a set of constraints.
val subst_closed_term_occ_decl : Environ.env -> Evd.evar_map -> (Locus.occurrences * Locus.hyp_location_flag) Locus.or_like_first -> EConstr.constr -> EConstr.named_declaration -> EConstr.named_declaration * Evd.evar_mapsubst_closed_term_occ_decl evd occl c decl replaces occurrences of closed c at positions occl by Rel 1 in decl.