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225 lines
6.4 KiB
C++
225 lines
6.4 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_FUNCTIONAL_BASE_03
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#define _LIBCPP_FUNCTIONAL_BASE_03
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// manual variadic expansion for <functional>
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// __invoke
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template <class _Ret, class _T1, bool _IsFunc, bool _IsBase>
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struct __enable_invoke_imp;
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template <class _Ret, class _T1>
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struct __enable_invoke_imp<_Ret, _T1, true, true> {
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typedef _Ret _Bullet1;
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typedef _Bullet1 type;
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};
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template <class _Ret, class _T1>
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struct __enable_invoke_imp<_Ret, _T1, true, false> {
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typedef _Ret _Bullet2;
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typedef _Bullet2 type;
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};
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template <class _Ret, class _T1>
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struct __enable_invoke_imp<_Ret, _T1, false, true> {
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typedef typename add_lvalue_reference<
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typename __apply_cv<_T1, _Ret>::type
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>::type _Bullet3;
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typedef _Bullet3 type;
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};
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template <class _Ret, class _T1>
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struct __enable_invoke_imp<_Ret, _T1, false, false> {
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typedef typename add_lvalue_reference<
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typename __apply_cv<decltype(*_VSTD::declval<_T1>()), _Ret>::type
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>::type _Bullet4;
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typedef _Bullet4 type;
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};
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template <class _Ret, class _T1>
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struct __enable_invoke_imp<_Ret, _T1*, false, false> {
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typedef typename add_lvalue_reference<
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typename __apply_cv<_T1, _Ret>::type
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>::type _Bullet4;
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typedef _Bullet4 type;
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};
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template <class _Fn, class _T1,
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class _Traits = __member_pointer_traits<_Fn>,
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class _Ret = typename _Traits::_ReturnType,
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class _Class = typename _Traits::_ClassType>
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struct __enable_invoke : __enable_invoke_imp<
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_Ret, _T1,
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is_member_function_pointer<_Fn>::value,
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is_base_of<_Class, typename remove_reference<_T1>::type>::value>
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{
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};
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__nat __invoke(__any, ...);
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// first bullet
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template <class _Fn, class _T1>
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inline _LIBCPP_INLINE_VISIBILITY
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typename __enable_invoke<_Fn, _T1>::_Bullet1
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__invoke(_Fn __f, _T1& __t1) {
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return (__t1.*__f)();
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}
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template <class _Fn, class _T1, class _A0>
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inline _LIBCPP_INLINE_VISIBILITY
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typename __enable_invoke<_Fn, _T1>::_Bullet1
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__invoke(_Fn __f, _T1& __t1, _A0& __a0) {
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return (__t1.*__f)(__a0);
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}
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template <class _Fn, class _T1, class _A0, class _A1>
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inline _LIBCPP_INLINE_VISIBILITY
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typename __enable_invoke<_Fn, _T1>::_Bullet1
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__invoke(_Fn __f, _T1& __t1, _A0& __a0, _A1& __a1) {
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return (__t1.*__f)(__a0, __a1);
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}
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template <class _Fn, class _T1, class _A0, class _A1, class _A2>
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inline _LIBCPP_INLINE_VISIBILITY
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typename __enable_invoke<_Fn, _T1>::_Bullet1
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__invoke(_Fn __f, _T1& __t1, _A0& __a0, _A1& __a1, _A2& __a2) {
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return (__t1.*__f)(__a0, __a1, __a2);
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}
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template <class _Fn, class _T1>
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inline _LIBCPP_INLINE_VISIBILITY
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typename __enable_invoke<_Fn, _T1>::_Bullet2
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__invoke(_Fn __f, _T1& __t1) {
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return ((*__t1).*__f)();
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}
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template <class _Fn, class _T1, class _A0>
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inline _LIBCPP_INLINE_VISIBILITY
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typename __enable_invoke<_Fn, _T1>::_Bullet2
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__invoke(_Fn __f, _T1& __t1, _A0& __a0) {
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return ((*__t1).*__f)(__a0);
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}
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template <class _Fn, class _T1, class _A0, class _A1>
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inline _LIBCPP_INLINE_VISIBILITY
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typename __enable_invoke<_Fn, _T1>::_Bullet2
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__invoke(_Fn __f, _T1& __t1, _A0& __a0, _A1& __a1) {
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return ((*__t1).*__f)(__a0, __a1);
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}
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template <class _Fn, class _T1, class _A0, class _A1, class _A2>
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inline _LIBCPP_INLINE_VISIBILITY
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typename __enable_invoke<_Fn, _T1>::_Bullet2
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__invoke(_Fn __f, _T1& __t1, _A0& __a0, _A1& __a1, _A2& __a2) {
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return ((*__t1).*__f)(__a0, __a1, __a2);
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}
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template <class _Fn, class _T1>
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inline _LIBCPP_INLINE_VISIBILITY
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typename __enable_invoke<_Fn, _T1>::_Bullet3
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__invoke(_Fn __f, _T1& __t1) {
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return __t1.*__f;
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}
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template <class _Fn, class _T1>
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inline _LIBCPP_INLINE_VISIBILITY
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typename __enable_invoke<_Fn, _T1>::_Bullet4
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__invoke(_Fn __f, _T1& __t1) {
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return (*__t1).*__f;
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}
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// fifth bullet
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template <class _Fp>
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inline _LIBCPP_INLINE_VISIBILITY
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decltype(_VSTD::declval<_Fp&>()())
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__invoke(_Fp& __f)
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{
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return __f();
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}
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template <class _Fp, class _A0>
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inline _LIBCPP_INLINE_VISIBILITY
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decltype(_VSTD::declval<_Fp&>()(_VSTD::declval<_A0&>()))
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__invoke(_Fp& __f, _A0& __a0)
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{
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return __f(__a0);
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}
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template <class _Fp, class _A0, class _A1>
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inline _LIBCPP_INLINE_VISIBILITY
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decltype(_VSTD::declval<_Fp&>()(_VSTD::declval<_A0&>(), _VSTD::declval<_A1&>()))
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__invoke(_Fp& __f, _A0& __a0, _A1& __a1)
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{
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return __f(__a0, __a1);
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}
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template <class _Fp, class _A0, class _A1, class _A2>
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inline _LIBCPP_INLINE_VISIBILITY
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decltype(_VSTD::declval<_Fp&>()(_VSTD::declval<_A0&>(), _VSTD::declval<_A1&>(), _VSTD::declval<_A2&>()))
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__invoke(_Fp& __f, _A0& __a0, _A1& __a1, _A2& __a2)
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{
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return __f(__a0, __a1, __a2);
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}
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template <class _Fp, bool = __has_result_type<__weak_result_type<_Fp> >::value>
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struct __invoke_return
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{
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typedef typename __weak_result_type<_Fp>::result_type type;
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};
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template <class _Fp>
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struct __invoke_return<_Fp, false>
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{
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typedef decltype(__invoke(_VSTD::declval<_Fp&>())) type;
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};
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template <class _Tp, class _A0>
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struct __invoke_return0
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{
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typedef decltype(__invoke(_VSTD::declval<_Tp&>(), _VSTD::declval<_A0&>())) type;
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};
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template <class _Rp, class _Tp, class _A0>
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struct __invoke_return0<_Rp _Tp::*, _A0>
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{
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typedef typename __enable_invoke<_Rp _Tp::*, _A0>::type type;
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};
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template <class _Tp, class _A0, class _A1>
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struct __invoke_return1
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{
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typedef decltype(__invoke(_VSTD::declval<_Tp&>(), _VSTD::declval<_A0&>(),
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_VSTD::declval<_A1&>())) type;
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};
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template <class _Rp, class _Class, class _A0, class _A1>
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struct __invoke_return1<_Rp _Class::*, _A0, _A1> {
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typedef typename __enable_invoke<_Rp _Class::*, _A0>::type type;
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};
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template <class _Tp, class _A0, class _A1, class _A2>
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struct __invoke_return2
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{
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typedef decltype(__invoke(_VSTD::declval<_Tp&>(), _VSTD::declval<_A0&>(),
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_VSTD::declval<_A1&>(),
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_VSTD::declval<_A2&>())) type;
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};
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template <class _Ret, class _Class, class _A0, class _A1, class _A2>
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struct __invoke_return2<_Ret _Class::*, _A0, _A1, _A2> {
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typedef typename __enable_invoke<_Ret _Class::*, _A0>::type type;
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};
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#endif // _LIBCPP_FUNCTIONAL_BASE_03
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