Added the compilation of theories/Numbers to Makefile.common. The following things compile: abstract natural numbers and integers with plus, times, minus, and order; Peano and binary implementations for natural numbers.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10161 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 5 insertions, 2 deletions

diff --git a/theories/Numbers/NumPrelude.v b/theories/Numbers/NumPrelude.v
index 6d3ad55a9..7feed2b14 100644
--- a/theories/Numbers/NumPrelude.v
+++ b/theories/Numbers/NumPrelude.v
@@ -226,12 +226,15 @@ Ltac rewrite_true P H :=
 setoid_replace P with True using relation iff;
 [| split; intro; [constructor | apply H]].
 
-Tactic Notation "symmetry" constr(Eq) :=
+(*Ltac symmetry Eq :=
 lazymatch Eq with
 | ?E ?t1 ?t2 => setoid_replace (E t1 t2) with (E t2 t1) using relation iff;
   [| split; intro; symmetry; assumption]
 | _ => fail Eq "does not have the form (E t1 t2)"
-end.
+end.*)
+(* This does not work because there already is a tactic "symmetry".
+Declaring "symmetry" a tactic notation does not work because it conflicts
+with "symmetry in": it thinks that "in" is a term. *)
 
 Theorem and_cancel_l : forall A B C : Prop,
   (B -> A) -> (C -> A ) -> ((A /\ B <-> A /\ C) <-> (B <-> C)).