libcxx/include/__functional_base_03

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_FUNCTIONAL_BASE_03
#define _LIBCPP_FUNCTIONAL_BASE_03

// manual variadic expansion for <functional>

// __invoke
// first bullet

template <class _Rp, class _Tp, class _T1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(), _T1& __t1)
{
    return (__t1.*__f)();
}

template <class _Rp, class _Tp, class _T1, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0), _T1& __t1, _A0& __a0)
{
    return (__t1.*__f)(__a0);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1), _T1& __t1, _A0& __a0, _A1& __a1)
{
    return (__t1.*__f)(__a0, __a1);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1, _A2), _T1& __t1, _A0& __a0, _A1& __a1, _A2& __a2)
{
    return (__t1.*__f)(__a0, __a1, __a2);
}

template <class _Rp, class _Tp, class _T1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)() const, _T1& __t1)
{
    return (__t1.*__f)();
}

template <class _Rp, class _Tp, class _T1, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0) const, _T1& __t1, _A0& __a0)
{
    return (__t1.*__f)(__a0);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1) const, _T1& __t1, _A0& __a0, _A1& __a1)
{
    return (__t1.*__f)(__a0, __a1);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1, _A2) const, _T1& __t1, _A0& __a0, _A1& __a1, _A2& __a2)
{
    return (__t1.*__f)(__a0, __a1, __a2);
}

template <class _Rp, class _Tp, class _T1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)() volatile, _T1& __t1)
{
    return (__t1.*__f)();
}

template <class _Rp, class _Tp, class _T1, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0) volatile, _T1& __t1, _A0& __a0)
{
    return (__t1.*__f)(__a0);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1) volatile, _T1& __t1, _A0& __a0, _A1& __a1)
{
    return (__t1.*__f)(__a0, __a1);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1, _A2) volatile, _T1& __t1, _A0& __a0, _A1& __a1, _A2& __a2)
{
    return (__t1.*__f)(__a0, __a1, __a2);
}

template <class _Rp, class _Tp, class _T1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)() const volatile, _T1& __t1)
{
    return (__t1.*__f)();
}

template <class _Rp, class _Tp, class _T1, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0) const volatile, _T1& __t1, _A0& __a0)
{
    return (__t1.*__f)(__a0);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1) const volatile, _T1& __t1, _A0& __a0, _A1& __a1)
{
    return (__t1.*__f)(__a0, __a1);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1, _A2) const volatile, _T1& __t1, _A0& __a0, _A1& __a1, _A2& __a2)
{
    return (__t1.*__f)(__a0, __a1, __a2);
}

// second bullet

template <class _Rp, class _Tp, class _T1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(), _T1 __t1)
{
    return ((*__t1).*__f)();
}

template <class _Rp, class _Tp, class _T1, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0), _T1 __t1, _A0& __a0)
{
    return ((*__t1).*__f)(__a0);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1), _T1 __t1, _A0& __a0, _A1& __a1)
{
    return ((*__t1).*__f)(__a0, __a1);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1, _A2), _T1 __t1, _A0& __a0, _A1& __a1, _A2& __a2)
{
    return ((*__t1).*__f)(__a0, __a1, __a2);
}

template <class _Rp, class _Tp, class _T1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)() const, _T1 __t1)
{
    return ((*__t1).*__f)();
}

template <class _Rp, class _Tp, class _T1, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0) const, _T1 __t1, _A0& __a0)
{
    return ((*__t1).*__f)(__a0);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1) const, _T1 __t1, _A0& __a0, _A1& __a1)
{
    return ((*__t1).*__f)(__a0, __a1);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1, _A2) const, _T1 __t1, _A0& __a0, _A1& __a1, _A2& __a2)
{
    return ((*__t1).*__f)(__a0, __a1, __a2);
}

template <class _Rp, class _Tp, class _T1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)() volatile, _T1 __t1)
{
    return ((*__t1).*__f)();
}

template <class _Rp, class _Tp, class _T1, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0) volatile, _T1 __t1, _A0& __a0)
{
    return ((*__t1).*__f)(__a0);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1) volatile, _T1 __t1, _A0& __a0, _A1& __a1)
{
    return ((*__t1).*__f)(__a0, __a1);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1, _A2) volatile, _T1 __t1, _A0& __a0, _A1& __a1, _A2& __a2)
{
    return ((*__t1).*__f)(__a0, __a1, __a2);
}

template <class _Rp, class _Tp, class _T1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)() const volatile, _T1 __t1)
{
    return ((*__t1).*__f)();
}

template <class _Rp, class _Tp, class _T1, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0) const volatile, _T1 __t1, _A0& __a0)
{
    return ((*__t1).*__f)(__a0);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1) const volatile, _T1 __t1, _A0& __a0, _A1& __a1)
{
    return ((*__t1).*__f)(__a0, __a1);
}

template <class _Rp, class _Tp, class _T1, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    !is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    _Rp
>::type
__invoke(_Rp (_Tp::*__f)(_A0, _A1, _A2) const volatile, _T1 __t1, _A0& __a0, _A1& __a1, _A2& __a2)
{
    return ((*__t1).*__f)(__a0, __a1, __a2);
}

// third bullet

template <class _Rp, class _Tp, class _T1>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
    is_base_of<_Tp, typename remove_reference<_T1>::type>::value,
    typename __apply_cv<_T1, _Rp>::type&
>::type
__invoke(_Rp _Tp::* __f, _T1& __t1)
{
    return __t1.*__f;
}

template <class _Rp, class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
void
__invoke(_Rp _Tp::*)
{
}

// forth bullet

template <class _T1, class _Rp, bool>
struct __4th_helper
{
};

template <class _T1, class _Rp>
struct __4th_helper<_T1, _Rp, true>
{
    typedef typename __apply_cv<decltype(*_VSTD::declval<_T1>()), _Rp>::type type;
};

template <class _Rp, class _Tp, class _T1>
inline _LIBCPP_INLINE_VISIBILITY
typename __4th_helper<_T1, _Rp,
                      !is_base_of<_Tp,
                                  typename remove_reference<_T1>::type
                                 >::value
                     >::type&
__invoke(_Rp _Tp::* __f, _T1& __t1)
{
    return (*__t1).*__f;
}

// fifth bullet

template <class _Fp>
inline _LIBCPP_INLINE_VISIBILITY
decltype(declval<_Fp>()())
__invoke(_Fp __f)
{
    return __f();
}

template <class _Fp, class _A0>
inline _LIBCPP_INLINE_VISIBILITY
decltype(declval<_Fp>()(declval<_A0&>()))
__invoke(_Fp __f, _A0& __a0)
{
    return __f(__a0);
}

template <class _Fp, class _A0, class _A1>
inline _LIBCPP_INLINE_VISIBILITY
decltype(declval<_Fp>()(declval<_A0&>(), declval<_A1&>()))
__invoke(_Fp __f, _A0& __a0, _A1& __a1)
{
    return __f(__a0, __a1);
}

template <class _Fp, class _A0, class _A1, class _A2>
inline _LIBCPP_INLINE_VISIBILITY
decltype(declval<_Fp>()(declval<_A0&>(), declval<_A1&>(), declval<_A2&>()))
__invoke(_Fp __f, _A0& __a0, _A1& __a1, _A2& __a2)
{
    return __f(__a0, __a1, __a2);
}

template <class _Tp>
struct __has_type
{
private:
    struct __two {char __lx; char __lxx;};
    template <class _Up> static __two __test(...);
    template <class _Up> static char __test(typename _Up::type* = 0);
public:
    static const bool value = sizeof(__test<_Tp>(0)) == 1;
};

template <class _Fp, bool = __has_result_type<__weak_result_type<_Fp> >::value>
struct __invoke_return
{
    typedef typename __weak_result_type<_Fp>::result_type type;
};

template <class _Fp>
struct __invoke_return<_Fp, false>
{
    typedef decltype(__invoke(_VSTD::declval<_Fp>())) type;
};

template <class _Tp, class _A0>
struct __invoke_return0
{
    typedef decltype(__invoke(_VSTD::declval<_Tp>(), _VSTD::declval<_A0>())) type;
};

template <class _Rp, class _Tp, class _A0>
struct __invoke_return0<_Rp _Tp::*, _A0>
{
    typedef typename __apply_cv<_A0, _Rp>::type& type;
};

template <class _Rp, class _Tp, class _A0>
struct __invoke_return0<_Rp _Tp::*, _A0*>
{
    typedef typename __apply_cv<_A0, _Rp>::type& type;
};

template <class _Tp, class _A0, class _A1>
struct __invoke_return1
{
    typedef decltype(__invoke(_VSTD::declval<_Tp>(), _VSTD::declval<_A0>(),
                                                    _VSTD::declval<_A1>())) type;
};

template <class _Tp, class _A0, class _A1, class _A2>
struct __invoke_return2
{
    typedef decltype(__invoke(_VSTD::declval<_Tp>(), _VSTD::declval<_A0>(),
                                                    _VSTD::declval<_A1>(),
                                                    _VSTD::declval<_A2>())) type;
};

#endif  // _LIBCPP_FUNCTIONAL_BASE_03