2 ||M|| This file is part of HELM, an Hypertextual, Electronic
3 ||A|| Library of Mathematics, developed at the Computer Science
4 ||T|| Department, University of Bologna, Italy.
6 ||T|| HELM is free software; you can redistribute it and/or
7 ||A|| modify it under the terms of the GNU General Public License
8 \ / version 2 or (at your option) any later version.
9 \ / This software is distributed as is, NO WARRANTY.
10 V_______________________________________________________________ *)
14 exception UnificationFailure of string Lazy.t;;
15 exception Uncertain of string Lazy.t;;
16 exception AssertFailure of string Lazy.t;;
19 NCic.metasenv -> NCic.substitution -> NCic.context ->
20 NCic.term -> NCic.term ->
21 NCic.metasenv * NCic.substitution
24 exception UnificationFailure of string Lazy.t;;
25 exception Uncertain of string Lazy.t;;
26 exception AssertFailure of string Lazy.t;;
28 (* fo_unif metasenv context t1 t2 *)
29 (* unifies [t1] and [t2] in a context [context]. *)
30 (* Only the metavariables declared in [metasenv] *)
31 (* can be used in [t1] and [t2]. *)
32 (* The returned substitution can be directly *)
33 (* withouth first unwinding it. *)
35 Cic.metasenv -> Cic.context ->
36 Cic.term -> Cic.term -> CicUniv.universe_graph ->
37 Cic.substitution * Cic.metasenv * CicUniv.universe_graph
39 (* fo_unif_subst metasenv subst context t1 t2 *)
40 (* unifies [t1] and [t2] in a context [context] *)
41 (* and with [subst] as the current substitution *)
42 (* (i.e. unifies ([subst] [t1]) and *)
43 (* ([subst] [t2]) in a context *)
44 (* ([subst] [context]) using the metasenv *)
45 (* ([subst] [metasenv]) *)
46 (* Only the metavariables declared in [metasenv] *)
47 (* can be used in [t1] and [t2]. *)
48 (* [subst] and the substitution returned are not *)
50 (*CSC: fare un tipo unione Unwinded o ToUnwind e fare gestire la
51 cosa all'apply_subst!!!*)
53 Cic.substitution -> Cic.context -> Cic.metasenv ->
54 Cic.term -> Cic.term -> CicUniv.universe_graph ->
55 Cic.substitution * Cic.metasenv * CicUniv.universe_graph