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| author | redi <redi@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-05-18 16:18:35 +0000 |
|---|---|---|
| committer | redi <redi@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-05-18 16:18:35 +0000 |
| commit | c8ae75b7453363883f0e8fab1f7657f4b0d50fe6 (patch) | |
| tree | f2b2b59742efeb4164b966ee4103f5f852051c65 /libstdc++-v3/include/std/utility | |
| parent | ce5e50454e25423bede36e3f7c71ae44e4a0b570 (diff) | |
| download | ppe42-gcc-c8ae75b7453363883f0e8fab1f7657f4b0d50fe6.tar.gz ppe42-gcc-c8ae75b7453363883f0e8fab1f7657f4b0d50fe6.zip | |
* include/std/utility (exchange): Define.
* testsuite/20_util/exchange/1.cc: New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@199061 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libstdc++-v3/include/std/utility')
| -rw-r--r-- | libstdc++-v3/include/std/utility | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libstdc++-v3/include/std/utility b/libstdc++-v3/include/std/utility index 8142ea466e4..ee8c6b19609 100644 --- a/libstdc++-v3/include/std/utility +++ b/libstdc++-v3/include/std/utility @@ -152,6 +152,18 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION get(const std::pair<_Tp1, _Tp2>& __in) noexcept { return __pair_get<_Int>::__const_get(__in); } +#if __cplusplus > 201103L + /// Assign @p __new_val to @p __obj and return its previous value. + template <class _Tp, class _Up = _Tp> + inline _Tp + exchange(_Tp& __obj, _Up&& __new_val) + { + _Tp __old_val = std::move(__obj); + __obj = std::forward<_Up>(__new_val); + return __old_val; + } +#endif + _GLIBCXX_END_NAMESPACE_VERSION } // namespace |
