mirror of git://gcc.gnu.org/git/gcc.git
d8d9b83b33
For COW strings the default constructor does not allocate when _GLIBCXX_FULLY_DYNAMIC_STRING == 0, so can be noexcept. The move constructor and swap do not allocate when the allocators are equal, so add conditional noexcept using allocator_traits::is_always_equal. PR libstdc++/58265 * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI] [_GLIBCXX_FULLY_DYNAMIC_STRING==0] (basic_string::basic_string()): Add GLIBCXX_NOEXCEPT. (basic_string::operator=(basic_string&&)): Add _GLIBCXX_NOEXCEPT_IF to depend on the allocator's is_always_equal property (LWG 2063). (basic_string::swap(basic_string&)): Likewise. * include/bits/basic_string.tcc [!_GLIBCXX_USE_CXX11_ABI] (basic_string::swap(basic_string&)): Likewise. * testsuite/21_strings/basic_string/allocator/char/move_assign.cc: Check is_nothrow_move_assignable. * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc: Check is_nothrow_move_assignable. * testsuite/21_strings/basic_string/cons/char/ noexcept_move_construct.cc: Likewise. * testsuite/21_strings/basic_string/cons/wchar_t/ noexcept_move_construct.cc: Likewise. From-SVN: r262443 |
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README
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.