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| author | Ville Voutilainen <ville.voutilainen@gmail.com> | 2016-10-20 14:54:52 +0300 |
|---|---|---|
| committer | Ville Voutilainen <ville@gcc.gnu.org> | 2016-10-20 14:54:52 +0300 |
| commit | f320e6a09193654596cd347fae835e85b458f94c (patch) | |
| tree | e918f7173f1a80275990376780df8b568e73df2c /libstdc++-v3/include/std/optional | |
| parent | 88b3e631506a51e5e1ae04224efe0b5ac5f7d0ca (diff) | |
| download | gcc-f320e6a09193654596cd347fae835e85b458f94c.zip gcc-f320e6a09193654596cd347fae835e85b458f94c.tar.gz gcc-f320e6a09193654596cd347fae835e85b458f94c.tar.bz2 | |
Do the operator= SFINAE in the return type for optional,
not in the template parameters.
* include/std/optional (operator=(_Up&&)): Move SFINAE
from template parameters to the return type.
(operator=(const optional<_Up>&)): Likewise.
(operator=(optional<_Up>&&)): Likewise.
From-SVN: r241372
Diffstat (limited to 'libstdc++-v3/include/std/optional')
| -rw-r--r-- | libstdc++-v3/include/std/optional | 55 |
1 files changed, 26 insertions, 29 deletions
diff --git a/libstdc++-v3/include/std/optional b/libstdc++-v3/include/std/optional index 21210ab..f272876 100644 --- a/libstdc++-v3/include/std/optional +++ b/libstdc++-v3/include/std/optional @@ -568,15 +568,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION return *this; } - template<typename _Up = _Tp, - enable_if_t<__and_< - __not_<is_same<optional<_Tp>, decay_t<_Up>>>, - is_constructible<_Tp, _Up>, - __not_<__and_<is_scalar<_Tp>, - is_same<_Tp, decay_t<_Up>>>>, - is_assignable<_Tp&, _Up>>::value, - bool> = true> - optional& + template<typename _Up = _Tp> + enable_if_t<__and_< + __not_<is_same<optional<_Tp>, decay_t<_Up>>>, + is_constructible<_Tp, _Up>, + __not_<__and_<is_scalar<_Tp>, + is_same<_Tp, decay_t<_Up>>>>, + is_assignable<_Tp&, _Up>>::value, + optional&> operator=(_Up&& __u) { if (this->_M_is_engaged()) @@ -587,16 +586,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION return *this; } - template<typename _Up, - enable_if_t<__and_< - __not_<is_same<_Tp, _Up>>, - is_constructible<_Tp, const _Up&>, - is_assignable<_Tp&, _Up>, - __not_<__converts_from_optional<_Tp, _Up>>, - __not_<__assigns_from_optional<_Tp, _Up>> - >::value, - bool> = true> - optional& + template<typename _Up> + enable_if_t<__and_< + __not_<is_same<_Tp, _Up>>, + is_constructible<_Tp, const _Up&>, + is_assignable<_Tp&, _Up>, + __not_<__converts_from_optional<_Tp, _Up>>, + __not_<__assigns_from_optional<_Tp, _Up>> + >::value, + optional&> operator=(const optional<_Up>& __u) { if (__u) @@ -613,16 +611,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION return *this; } - template<typename _Up, - enable_if_t<__and_< - __not_<is_same<_Tp, _Up>>, - is_constructible<_Tp, _Up>, - is_assignable<_Tp&, _Up>, - __not_<__converts_from_optional<_Tp, _Up>>, - __not_<__assigns_from_optional<_Tp, _Up>> - >::value, - bool> = true> - optional& + template<typename _Up> + enable_if_t<__and_< + __not_<is_same<_Tp, _Up>>, + is_constructible<_Tp, _Up>, + is_assignable<_Tp&, _Up>, + __not_<__converts_from_optional<_Tp, _Up>>, + __not_<__assigns_from_optional<_Tp, _Up>> + >::value, + optional&> operator=(optional<_Up>&& __u) { if (__u) |