From e7f1930f9411e6fcee99f832a5a16c74cd6740c6 Mon Sep 17 00:00:00 2001 From: Jason Merrill Date: Fri, 31 Jul 2009 22:26:42 -0400 Subject: call.c (convert_class_to_reference): Binding an lvalue to an rvalue reference is bad. * call.c (convert_class_to_reference): Binding an lvalue to an rvalue reference is bad. If the user-defined conversion is bad, set bad_p before merging conversions. (maybe_handle_ref_bind): Don't push down bad_p. (reference_binding): Binding an lvalue to an rvalue reference is bad. (convert_like_real): Give a helpful error about binding lvalue to rvalue reference. (reference_related_p): No longer static. * typeck.c (build_typed_address): New. (build_static_cast_1): Add static_cast from lvalue to &&. * cp-tree.h: Adjust. * include/bits/move.h (forward): Implement as in N2835. (move): Implement as in N2831. * include/std/istream (rvalue stream operator>>): New. * include/std/ostream (rvalue stream operator<<): New. Co-Authored-By: Douglas Gregor From-SVN: r150327 --- libstdc++-v3/include/std/istream | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'libstdc++-v3/include/std/istream') diff --git a/libstdc++-v3/include/std/istream b/libstdc++-v3/include/std/istream index 1979a51..f20b896 100644 --- a/libstdc++-v3/include/std/istream +++ b/libstdc++-v3/include/std/istream @@ -827,6 +827,27 @@ _GLIBCXX_BEGIN_NAMESPACE(std) basic_istream<_CharT, _Traits>& ws(basic_istream<_CharT, _Traits>& __is); +#ifdef __GXX_EXPERIMENTAL_CXX0X__ + // [27.7.1.6] Rvalue stream extraction + /** + * @brief Generic extractor for rvalue stream + * @param is An input stream. + * @param x A reference to the extraction target. + * @return is + * + * This is just a forwarding function to allow extraction from + * rvalue streams since they won't bind to the extractor functions + * that take an lvalue reference. + */ + template + basic_istream<_CharT, _Traits>& + operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x) + { + __is >> __x; + return __is; + } +#endif // __GXX_EXPERIMENTAL_CXX0X__ + _GLIBCXX_END_NAMESPACE #ifndef _GLIBCXX_EXPORT_TEMPLATE -- cgit v1.1