diff options
author | msozeau <msozeau@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2008-09-14 10:59:54 +0000 |
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committer | msozeau <msozeau@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2008-09-14 10:59:54 +0000 |
commit | 483515414c44131d50e48020b8aa18fdda9c5aaf (patch) | |
tree | 4292e79d240415055ea4f65bc0504dce1f549e6a /test-suite/bugs/closed | |
parent | 77f1445b7f7d5499becbfa4c7ecfc9c0772f7971 (diff) |
Fix bug #1931 by searching for a sort after doing beta,iota,delta-
normalization. Add test-suite file.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11406 85f007b7-540e-0410-9357-904b9bb8a0f7
Diffstat (limited to 'test-suite/bugs/closed')
-rw-r--r-- | test-suite/bugs/closed/shouldsucceed/1931.v | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test-suite/bugs/closed/shouldsucceed/1931.v b/test-suite/bugs/closed/shouldsucceed/1931.v new file mode 100644 index 000000000..bc8be78fe --- /dev/null +++ b/test-suite/bugs/closed/shouldsucceed/1931.v @@ -0,0 +1,29 @@ + + +Set Implicit Arguments. + +Inductive T (A:Set) : Set := + app : T A -> T A -> T A. + +Fixpoint map (A B:Set)(f:A->B)(t:T A) : T B := + match t with + app t1 t2 => app (map f t1)(map f t2) + end. + +Fixpoint subst (A B:Set)(f:A -> T B)(t:T A) :T B := + match t with + app t1 t2 => app (subst f t1)(subst f t2) + end. + +(* This is the culprit: *) +Definition k0:=Set. + +(** interaction of subst with map *) +Lemma substLaw1 (A:k0)(B C:Set)(f: A -> B)(g:B -> T C)(t: T A): + subst g (map f t) = subst (fun x => g (f x)) t. +Proof. + intros. + generalize B C f g; clear B C f g. + induction t; intros; simpl. + f_equal. +Admitted. |