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Constrain __invoke functions more accurately. This fixes http://llvm.org/bugs/show_bug.cgi?id=15861 .

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@181377 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Howard Hinnant 2013-05-07 23:40:12 +00:00
parent 5f1286f574
commit ecc9742f27
3 changed files with 47 additions and 8 deletions
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12
include/__functional_base
View File

@ -292,7 +292,8 @@ struct __weak_result_type<_Rp (_Cp::*)(_A1, _A2, _A3...) const volatile>
// bullets 1 and 2
template <class _Fp, class _A0, class ..._Args>
template <class _Fp, class _A0, class ..._Args,
class>
inline _LIBCPP_INLINE_VISIBILITY
auto
__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
@ -301,7 +302,8 @@ __invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
return (_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...);
}
template <class _Fp, class _A0, class ..._Args>
template <class _Fp, class _A0, class ..._Args,
class>
inline _LIBCPP_INLINE_VISIBILITY
auto
__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
@ -312,7 +314,8 @@ __invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
// bullets 3 and 4
template <class _Fp, class _A0>
template <class _Fp, class _A0,
class>
inline _LIBCPP_INLINE_VISIBILITY
auto
__invoke(_Fp&& __f, _A0&& __a0)
@ -321,7 +324,8 @@ __invoke(_Fp&& __f, _A0&& __a0)
return _VSTD::forward<_A0>(__a0).*__f;
}
template <class _Fp, class _A0>
template <class _Fp, class _A0,
class>
inline _LIBCPP_INLINE_VISIBILITY
auto
__invoke(_Fp&& __f, _A0&& __a0)

36
include/type_traits
View File

@ -2878,13 +2878,27 @@ __invoke(__any, _Args&& ...__args)
// bullets 1 and 2
template <class _Fp, class _A0, class ..._Args>
template <class _Fp, class _A0, class ..._Args,
class = typename enable_if
<
is_member_function_pointer<typename remove_reference<_Fp>::type>::value &&
is_base_of<typename __member_pointer_traits<typename remove_reference<_Fp>::type>::_ClassType,
typename remove_reference<_A0>::type>::value
>::type
>
_LIBCPP_INLINE_VISIBILITY
auto
__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
-> decltype((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...));
template <class _Fp, class _A0, class ..._Args>
template <class _Fp, class _A0, class ..._Args,
class = typename enable_if
<
is_member_function_pointer<typename remove_reference<_Fp>::type>::value &&
!is_base_of<typename __member_pointer_traits<typename remove_reference<_Fp>::type>::_ClassType,
typename remove_reference<_A0>::type>::value
>::type
>
_LIBCPP_INLINE_VISIBILITY
auto
__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
@ -2892,13 +2906,27 @@ __invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args)
// bullets 3 and 4
template <class _Fp, class _A0>
template <class _Fp, class _A0,
class = typename enable_if
<
is_member_object_pointer<typename remove_reference<_Fp>::type>::value &&
is_base_of<typename __member_pointer_traits<typename remove_reference<_Fp>::type>::_ClassType,
typename remove_reference<_A0>::type>::value
>::type
>
_LIBCPP_INLINE_VISIBILITY
auto
__invoke(_Fp&& __f, _A0&& __a0)
-> decltype(_VSTD::forward<_A0>(__a0).*__f);
template <class _Fp, class _A0>
template <class _Fp, class _A0,
class = typename enable_if
<
is_member_object_pointer<typename remove_reference<_Fp>::type>::value &&
!is_base_of<typename __member_pointer_traits<typename remove_reference<_Fp>::type>::_ClassType,
typename remove_reference<_A0>::type>::value
>::type
>
_LIBCPP_INLINE_VISIBILITY
auto
__invoke(_Fp&& __f, _A0&& __a0)

7
test/utilities/meta/meta.trans/meta.trans.other/result_of.pass.cpp
View File

@ -28,6 +28,12 @@ struct S
typedef void (S::*PMS)(long) const;
typedef char S::*PMD;
struct wat
{
wat& operator*() { return *this; }
void foo();
};
int main()
{
static_assert((std::is_same<std::result_of<S(int)>::type, short>::value), "Error!");
@ -40,4 +46,5 @@ int main()
static_assert((std::is_same<std::result_of<PMD(S)>::type, char&&>::value), "Error!");
#endif
static_assert((std::is_same<std::result_of<PMD(const S*)>::type, const char&>::value), "Error!");
using type = std::result_of<decltype(&wat::foo)(wat)>::type;
}