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_______________________________________________________________ *)
15 exception UnificationFailure of string Lazy.t;;
16 exception Uncertain of string Lazy.t;;
17 exception AssertFailure of string Lazy.t;;
19 (* fo_unif metasenv context t1 t2 *)
20 (* unifies [t1] and [t2] in a context [context]. *)
21 (* Only the metavariables declared in [metasenv] *)
22 (* can be used in [t1] and [t2]. *)
23 (* The returned substitution can be directly *)
24 (* withouth first unwinding it. *)
26 Cic.metasenv -> Cic.context ->
27 Cic.term -> Cic.term -> CicUniv.universe_graph ->
28 Cic.substitution * Cic.metasenv * CicUniv.universe_graph
30 (* fo_unif_subst metasenv subst context t1 t2 *)
31 (* unifies [t1] and [t2] in a context [context] *)
32 (* and with [subst] as the current substitution *)
33 (* (i.e. unifies ([subst] [t1]) and *)
34 (* ([subst] [t2]) in a context *)
35 (* ([subst] [context]) using the metasenv *)
36 (* ([subst] [metasenv]) *)
37 (* Only the metavariables declared in [metasenv] *)
38 (* can be used in [t1] and [t2]. *)
39 (* [subst] and the substitution returned are not *)
41 (*CSC: fare un tipo unione Unwinded o ToUnwind e fare gestire la
42 cosa all'apply_subst!!!*)
44 Cic.substitution -> Cic.context -> Cic.metasenv ->
45 Cic.term -> Cic.term -> CicUniv.universe_graph ->
46 Cic.substitution * Cic.metasenv * CicUniv.universe_graph