gcc 4.7.0 20110422 (experimental) in C++0x mode rejects the following code at the line marked with #: //------------------------- template<class T> struct add_rval_ref { typedef T&& type; }; template<> struct add_rval_ref<void> { typedef void type; }; template<class T> typename add_rval_ref<T>::type create(); template<class T, class Arg> decltype(T{create<Arg>()}, char()) f(int); template<class, class> char (&f(...))[2]; static_assert(sizeof(f<int, void>(0)) != 1, "Error"); // # //------------------------- "error: void value not ignored as it ought to be" The code should be accepted.
Working on this one.
Author: paolo Date: Mon May 9 19:24:50 2011 New Revision: 173590 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173590 Log: /cp 2011-05-09 Paolo Carlini <paolo.carlini@oracle.com> PR c++/48737 PR c++/48744 * decl.c (reshape_init): Take a complain parameter and do not call error if tf_error is not set. (check_initializer, reshape_init_r, reshape_init_array, reshape_init_array_1, reshape_init_vector, reshape_init_class): Adjust. * typeck2.c (digest_init_r): Take a complain parameter and pass it to convert_for_initialization. (digest_init, digest_init_flags, process_init_constructor_array, process_init_constructor_record, process_init_constructor_union, process_init_constructor, digest_init_r): Adjust. * init.c (expand_default_init, build_new_1): Likewise. * typeck.c (cp_build_modify_expr): Likewise. * decl2.c (grokfield): Likewise. * call.c (convert_like_real, convert_default_arg): Likewise. * semantics.c (finish_compound_literal): Pass complain to reshape_init and digest_init. * cp-tree.h: Adjust declarations. /testsuite 2011-05-09 Paolo Carlini <paolo.carlini@oracle.com> PR c++/48737 PR c++/48744 * g++.dg/template/sfinae28.C: New. * g++.dg/template/sfinae29.C: Likewise. Added: trunk/gcc/testsuite/g++.dg/template/sfinae28.C trunk/gcc/testsuite/g++.dg/template/sfinae29.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/call.c trunk/gcc/cp/cp-tree.h trunk/gcc/cp/decl.c trunk/gcc/cp/decl2.c trunk/gcc/cp/init.c trunk/gcc/cp/semantics.c trunk/gcc/cp/typeck.c trunk/gcc/cp/typeck2.c trunk/gcc/testsuite/ChangeLog
Done.