http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53540
--- Comment #8 from Dodji Seketeli <dodji at gcc dot gnu.org> 2012-10-10 10:44:02 UTC --- Author: dodji Date: Wed Oct 10 10:43:53 2012 New Revision: 192304 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192304 Log: PR c++/53540 - using fails to be equivalent to typedef In the example of this problem report, during the substituting of int into 'function', tsubst_aggr_type fails for the alias ctxt1. This is because TYPE_TEMPLATE_INFO looks for the TEMPLATE_INFO of the ctxt1 alias at the wrong place and was wrongly finding it to be NULL. Namely, it was looking for it in the DECL_TEMPLATE_INFO of the declaration of the type -- as if ctxt1 was an alias template specialization -- rather than looking for it in its CLASSTYPE_TEMPLATE_INFO. Fixed thus. The other hunks of the patch are a cleanup to make a better use of alias_template_specialization_p. Bootstrapped and tested on x86_64-unknown-linux-gnu against trunk. gcc/cp * cp-tree.h (TYPE_TEMPLATE_INFO): For an alias that is not an instance of alias template, don't look for its TEMPLATE_INFO in its declaration. (alias_template_specialization_p): Take const_tree. * pt.c (alias_template_specialization_p): Take a const_tree. Don't call primary_template_instantiation_p. (primary_template_instantiation_p): Call alias_template_specialization_p. gcc/testsuite/ * g++.dg/cpp0x/alias-decl-24.C: New test. Added: trunk/gcc/testsuite/g++.dg/cpp0x/alias-decl-24.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/cp-tree.h trunk/gcc/cp/pt.c trunk/gcc/testsuite/ChangeLog
