Ajout projections de triplet

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@4625 85f007b7-540e-0410-9357-904b9bb8a0f7

2 files changed, 12 insertions, 0 deletions

diff --git a/lib/util.ml b/lib/util.ml
index 4d86f04f5..117eeef1f 100644
--- a/lib/util.ml
+++ b/lib/util.ml
@@ -31,6 +31,12 @@ let user_err_loc (loc,s,strm) = Stdpp.raise_with_loc loc (UserError (s,strm))
 let invalid_arg_loc (loc,s) = Stdpp.raise_with_loc loc (Invalid_argument s)
 let join_loc (deb1,_) (_,fin2) = (deb1,fin2)
 
+(* Projections from triplets *)
+
+let pi1 (a,_,_) = a
+let pi2 (_,a,_) = a
+let pi3 (_,_,a) = a
+
 (* Characters *)
 
 let is_letter c =
diff --git a/lib/util.mli b/lib/util.mli
index 85c828abf..23791fecb 100644
--- a/lib/util.mli
+++ b/lib/util.mli
@@ -41,6 +41,12 @@ val user_err_loc : loc * string * std_ppcmds -> 'a
 val invalid_arg_loc : loc * string -> 'a
 val join_loc : loc -> loc -> loc
 
+(*s Projections from triplets *)
+
+val pi1 : 'a * 'b * 'c -> 'a
+val pi2 : 'a * 'b * 'c -> 'b
+val pi3 : 'a * 'b * 'c -> 'c
+
 (*s Chars. *)
 
 val is_letter : char -> bool