type equality =
- Cic.term * (* proof *)
- (Cic.term * (* type *)
- Cic.term * (* left side *)
- Cic.term) * (* right side *)
- Cic.metasenv * (* environment for metas *)
- Cic.term list (* arguments *)
-;;
+ int * (* weight *)
+ proof *
+ (Cic.term * (* type *)
+ Cic.term * (* left side *)
+ Cic.term * (* right side *)
+ Utils.comparison) * (* ordering *)
+ Cic.metasenv * (* environment for metas *)
+ Cic.term list (* arguments *)
-type environment = Cic.metasenv * Cic.context * CicUniv.universe_graph;;
+and proof =
+ | BasicProof of Cic.term
+ | ProofBlock of
+ Cic.substitution * UriManager.uri *
+ (* name, ty, eq_ty, left, right *)
+ (Cic.name * Cic.term * Cic.term * Cic.term * Cic.term) *
+ (Utils.pos * equality) * equality
+ | NoProof
+type environment = Cic.metasenv * Cic.context * CicUniv.universe_graph
+
+
+exception MatchingFailure
+
+val matching:
+ Cic.metasenv -> Cic.context -> Cic.term -> Cic.term ->
+ CicUniv.universe_graph ->
+ Cic.substitution * Cic.metasenv * CicUniv.universe_graph
+
+val unification:
+ Cic.metasenv -> Cic.context -> Cic.term -> Cic.term ->
+ CicUniv.universe_graph ->
+ Cic.substitution * Cic.metasenv * CicUniv.universe_graph
+
+
(**
Performs the beta expansion of the term "where" w.r.t. "what",
i.e. returns the list of all the terms t s.t. "(t what) = where".
returns a list of new clauses inferred with a left superposition step
the negative equation "target" and the positive equation "source"
*)
-val superposition_left: environment -> equality -> equality -> equality list
+(* val superposition_left: environment -> equality -> equality -> equality list *)
(**
superposition_right newmeta env target source
"newmeta" is the first free meta index, i.e. the first number above the
highest meta index: its updated value is also returned
*)
-val superposition_right:
- int -> environment -> equality -> equality -> int * equality list
+(* val superposition_right: *)
+(* int -> environment -> equality -> equality -> int * equality list *)
-val demodulation: int -> environment -> equality -> equality -> int * equality
+(* val demodulation: int -> environment -> equality -> equality -> int * equality *)
val meta_convertibility_eq: equality -> equality -> bool
val string_of_equality: ?env:environment -> equality -> string
+(* val subsumption: environment -> equality -> equality -> bool *)
+
+val metas_of_term: Cic.term -> int list
+
+val fix_metas: int -> equality -> int * equality
+
+val extract_differing_subterms:
+ Cic.term -> Cic.term -> (Cic.term * Cic.term) option
+val build_term_proof: equality -> Cic.term