Added support for Ltac-matching terms with variables bound in the pattern

- Instances found by matching.ml now collect the set of bound
  variables they possibly depend on in the pattern (see type
  Pattern.extended_patvar_map); the variables names are canonically
  ordered so that non-linear matching takes actual names into account.
- Removed typing of matching constr instances in advance (in
  tacinterp.ml) and did it only at use time (in pretyping.ml). Drawback
  is that we may have to re-type several times the same term but it is
  necessary for considering terms with locally bound variables of which
  we do not keep the type (and if even we had kept the type, we would have
  to adjust the indices to the actual context the term occurs).
- A bit of documentation of pattern.mli, matching.mli and pretyping.mli.
- Incidentally add env while printing idtac messages. It seems more correct
  and I hope I did not break some intended existing behavior.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13080 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 3 insertions, 3 deletions

diff --git a/tactics/tacinterp.mli b/tactics/tacinterp.mli
index 7c731e2b9..5fa9c220d 100644
--- a/tactics/tacinterp.mli
+++ b/tactics/tacinterp.mli
@@ -27,7 +27,7 @@ type value =
   | VVoid
   | VInteger of int
   | VIntroPattern of intro_pattern_expr
-  | VConstr of constr
+  | VConstr of Pattern.constr_under_binders
   | VConstr_context of constr
   | VList of value list
   | VRec of (identifier*value) list ref * glob_tactic_expr
@@ -39,8 +39,8 @@ and interp_sign =
     debug : debug_info;
     trace : ltac_trace }
 
-val extract_ltac_vars : interp_sign -> Evd.evar_map -> Environ.env ->
-  Pretyping.var_map * Pretyping.unbound_ltac_var_map
+val extract_ltac_constr_values : interp_sign -> Environ.env ->
+  Pretyping.ltac_var_map
 
 (** Transforms an id into a constr if possible *)
 val constr_of_id : Environ.env -> identifier -> constr