Merge C++03 and C++11 implementations of mem_fn and __mem_fn.

The implementation of mem_fn doesn't actually require any  C++11 support.
For some reason there were 17 overloads for mem_fn in C++03 when only one
is needed. This patch removes the extra overloads and uses the same implementation
of mem_fn in C++03 and C++11.

__mem_fn does require variadics to implement the call operator. Instead of
having two entirely different implementations of the __mem_fn struct, this patch
uses the same __mem_fn struct but provides different call operators when
variadics are not available.

The only thing left in <__functional_03> is the C++03 implementation of
std::function.


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@242959 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier 2015-07-22 22:43:27 +00:00
parent 5b3a4593da
commit db8c4fd8c7
2 changed files with 35 additions and 199 deletions

View File

@ -17,185 +17,6 @@
#pragma GCC system_header
#endif
template <class _Tp>
class __mem_fn
: public __weak_result_type<_Tp>
{
public:
// types
typedef _Tp type;
private:
type __f_;
public:
_LIBCPP_INLINE_VISIBILITY __mem_fn(type __f) : __f_(__f) {}
// invoke
typename __invoke_return<type>::type
operator() () const
{
return __invoke(__f_);
}
template <class _A0>
typename __invoke_return0<type, _A0>::type
operator() (_A0& __a0) const
{
return __invoke(__f_, __a0);
}
template <class _A0, class _A1>
typename __invoke_return1<type, _A0, _A1>::type
operator() (_A0& __a0, _A1& __a1) const
{
return __invoke(__f_, __a0, __a1);
}
template <class _A0, class _A1, class _A2>
typename __invoke_return2<type, _A0, _A1, _A2>::type
operator() (_A0& __a0, _A1& __a1, _A2& __a2) const
{
return __invoke(__f_, __a0, __a1, __a2);
}
};
template<class _Rp, class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp _Tp::*>
mem_fn(_Rp _Tp::* __pm)
{
return __mem_fn<_Rp _Tp::*>(__pm);
}
template<class _Rp, class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)()>
mem_fn(_Rp (_Tp::* __pm)())
{
return __mem_fn<_Rp (_Tp::*)()>(__pm);
}
template<class _Rp, class _Tp, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0)>
mem_fn(_Rp (_Tp::* __pm)(_A0))
{
return __mem_fn<_Rp (_Tp::*)(_A0)>(__pm);
}
template<class _Rp, class _Tp, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0, _A1)>
mem_fn(_Rp (_Tp::* __pm)(_A0, _A1))
{
return __mem_fn<_Rp (_Tp::*)(_A0, _A1)>(__pm);
}
template<class _Rp, class _Tp, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0, _A1, _A2)>
mem_fn(_Rp (_Tp::* __pm)(_A0, _A1, _A2))
{
return __mem_fn<_Rp (_Tp::*)(_A0, _A1, _A2)>(__pm);
}
template<class _Rp, class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)() const>
mem_fn(_Rp (_Tp::* __pm)() const)
{
return __mem_fn<_Rp (_Tp::*)() const>(__pm);
}
template<class _Rp, class _Tp, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0) const>
mem_fn(_Rp (_Tp::* __pm)(_A0) const)
{
return __mem_fn<_Rp (_Tp::*)(_A0) const>(__pm);
}
template<class _Rp, class _Tp, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0, _A1) const>
mem_fn(_Rp (_Tp::* __pm)(_A0, _A1) const)
{
return __mem_fn<_Rp (_Tp::*)(_A0, _A1) const>(__pm);
}
template<class _Rp, class _Tp, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0, _A1, _A2) const>
mem_fn(_Rp (_Tp::* __pm)(_A0, _A1, _A2) const)
{
return __mem_fn<_Rp (_Tp::*)(_A0, _A1, _A2) const>(__pm);
}
template<class _Rp, class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)() volatile>
mem_fn(_Rp (_Tp::* __pm)() volatile)
{
return __mem_fn<_Rp (_Tp::*)() volatile>(__pm);
}
template<class _Rp, class _Tp, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0) volatile>
mem_fn(_Rp (_Tp::* __pm)(_A0) volatile)
{
return __mem_fn<_Rp (_Tp::*)(_A0) volatile>(__pm);
}
template<class _Rp, class _Tp, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0, _A1) volatile>
mem_fn(_Rp (_Tp::* __pm)(_A0, _A1) volatile)
{
return __mem_fn<_Rp (_Tp::*)(_A0, _A1) volatile>(__pm);
}
template<class _Rp, class _Tp, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0, _A1, _A2) volatile>
mem_fn(_Rp (_Tp::* __pm)(_A0, _A1, _A2) volatile)
{
return __mem_fn<_Rp (_Tp::*)(_A0, _A1, _A2) volatile>(__pm);
}
template<class _Rp, class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)() const volatile>
mem_fn(_Rp (_Tp::* __pm)() const volatile)
{
return __mem_fn<_Rp (_Tp::*)() const volatile>(__pm);
}
template<class _Rp, class _Tp, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0) const volatile>
mem_fn(_Rp (_Tp::* __pm)(_A0) const volatile)
{
return __mem_fn<_Rp (_Tp::*)(_A0) const volatile>(__pm);
}
template<class _Rp, class _Tp, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0, _A1) const volatile>
mem_fn(_Rp (_Tp::* __pm)(_A0, _A1) const volatile)
{
return __mem_fn<_Rp (_Tp::*)(_A0, _A1) const volatile>(__pm);
}
template<class _Rp, class _Tp, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
__mem_fn<_Rp (_Tp::*)(_A0, _A1, _A2) const volatile>
mem_fn(_Rp (_Tp::* __pm)(_A0, _A1, _A2) const volatile)
{
return __mem_fn<_Rp (_Tp::*)(_A0, _A1, _A2) const volatile>(__pm);
}
namespace __function {
template<class _Fp> class __base;

View File

@ -1238,8 +1238,6 @@ mem_fun_ref(_Sp (_Tp::*__f)(_Ap) const)
// MEMFUN
//==============================================================================
#ifndef _LIBCPP_HAS_NO_VARIADICS
template <class _Tp>
class __mem_fn
: public __weak_result_type<_Tp>
@ -1253,14 +1251,38 @@ private:
public:
_LIBCPP_INLINE_VISIBILITY __mem_fn(type __f) : __f_(__f) {}
#ifndef _LIBCPP_HAS_NO_VARIADICS
// invoke
template <class... _ArgTypes>
_LIBCPP_INLINE_VISIBILITY
typename __invoke_return<type, _ArgTypes...>::type
operator() (_ArgTypes&&... __args) const
{
return __invoke(__f_, _VSTD::forward<_ArgTypes>(__args)...);
}
_LIBCPP_INLINE_VISIBILITY
typename __invoke_return<type, _ArgTypes...>::type
operator() (_ArgTypes&&... __args) const {
return __invoke(__f_, _VSTD::forward<_ArgTypes>(__args)...);
}
#else
typename __invoke_return<type>::type
operator() () const {
return __invoke(__f_);
}
template <class _A0>
typename __invoke_return0<type, _A0>::type
operator() (_A0& __a0) const {
return __invoke(__f_, __a0);
}
template <class _A0, class _A1>
typename __invoke_return1<type, _A0, _A1>::type
operator() (_A0& __a0, _A1& __a1) const {
return __invoke(__f_, __a0, __a1);
}
template <class _A0, class _A1, class _A2>
typename __invoke_return2<type, _A0, _A1, _A2>::type
operator() (_A0& __a0, _A1& __a1, _A2& __a2) const {
return __invoke(__f_, __a0, __a1, __a2);
}
#endif
};
template<class _Rp, class _Tp>
@ -1271,8 +1293,6 @@ mem_fn(_Rp _Tp::* __pm)
return __mem_fn<_Rp _Tp::*>(__pm);
}
#endif // _LIBCPP_HAS_NO_VARIADICS
////////////////////////////////////////////////////////////////////////////////
// FUNCTION
//==============================================================================
@ -1860,7 +1880,11 @@ void
swap(function<_Rp(_ArgTypes...)>& __x, function<_Rp(_ArgTypes...)>& __y) _NOEXCEPT
{return __x.swap(__y);}
#endif // _LIBCPP_HAS_NO_VARIADICS
#else // _LIBCPP_HAS_NO_VARIADICS
#include <__functional_03>
#endif
////////////////////////////////////////////////////////////////////////////////
// BIND
@ -2479,15 +2503,6 @@ invoke(_Fn&& __f, _Args&&... __args) {
// struct hash<T*> in <memory>
////////////////////////////////////////////////////////////////////////////////
// FUNCTIONAL 03
//==============================================================================
#ifdef _LIBCPP_HAS_NO_VARIADICS
#include <__functional_03>
#endif
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_FUNCTIONAL