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re PR c++/35828 ([C++0x] ICE on default template template parameter in template function)

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PR c++/35828
	* pt.c (tsubst_decl): Don't abort if we didn't change anything
	in a TEMPLATE_DECL's args.

From-SVN: r149351
This commit is contained in:
Jason Merrill 2009-07-07 18:03:42 -04:00 committed by Jason Merrill
parent 5e278028ed
commit 438c0fa8a0
4 changed files with 24 additions and 6 deletions
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6
gcc/cp/ChangeLog
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@ -1,3 +1,9 @@
2009-07-07 Jason Merrill <jason@redhat.com>
PR c++/35828
* pt.c (tsubst_decl): Don't abort if we didn't change anything
in a TEMPLATE_DECL's args.
2009-07-07 Manuel López-Ibáñez <manu@gcc.gnu.org>
* semantics.c (finalize_nrv_r): Replace EXPR_LOCUS by

11
gcc/cp/pt.c
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@ -8306,8 +8306,7 @@ tsubst_decl (tree t, tree args, tsubst_flags_t complain)
case TEMPLATE_DECL:
{
/* We can get here when processing a member function template,
member class template, and template template parameter of
a template class. */
member class template, or template template parameter. */
tree decl = DECL_TEMPLATE_RESULT (t);
tree spec;
tree tmpl_args;
@ -8351,10 +8350,10 @@ tsubst_decl (tree t, tree args, tsubst_flags_t complain)
if (full_args == error_mark_node)
return error_mark_node;
/* tsubst_template_args doesn't copy the vector if
nothing changed. But, *something* should have
changed. */
gcc_assert (full_args != tmpl_args);
/* If this is a default template template argument,
tsubst might not have changed anything. */
if (full_args == tmpl_args)
return t;
hash = hash_tmpl_and_args (t, full_args);
spec = retrieve_specialization (t, full_args, hash);

3
gcc/testsuite/ChangeLog
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@ -1,5 +1,8 @@
2009-07-07 Jason Merrill <jason@redhat.com>
PR c++/35828
* g++.dg/template/defarg12.C: New.
PR c++/37816
* g++.dg/cpp0x/enum7.C: New.

10
gcc/testsuite/g++.dg/template/defarg12.C Normal file
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@ -0,0 +1,10 @@
// PR c++/35828
// { dg-options "-std=c++0x" }
template < typename > struct A ;
template < template < typename > class = A >
void test ()
{
test ();
}