http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29028
--- Comment #4 from Dodji Seketeli <dodji at gcc dot gnu.org> 2012-09-28 12:51:42 UTC --- Author: dodji Date: Fri Sep 28 12:51:30 2012 New Revision: 191829 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191829 Log: PR c++/29028 - Missed unused warning on using declaration In the example of the patch, g++ fails to warn that the variable N::i (introduced via a using declaration) is unused. This is because as we want to emit the warning in poplevel, when we walk the local bindings returned by getdecls, we forget that a VAR_DECL introduced by a using declaration is represented by a TREE_LIST which TREE_VALUE is the VAR_DECL, and we wrongly look for a bare VAR_DECL. Fixed thus and tested on x86_64-unknown-linux-gnu against trunk. gcc/cp/ * decl.c (poplevel<warn_unused*>): Do not forget that some local bindings are represented by a TREE_LIST. gcc/testsuite/ * g++.dg/warn/Wunused-var-18.C: New test. Added: trunk/gcc/testsuite/g++.dg/warn/Wunused-var-18.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/decl.c trunk/gcc/testsuite/ChangeLog
