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// Copyright (C) 2016-2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-options "-std=gnu++17" }
// { dg-do compile }
#include <type_traits>
#ifndef IS_INVOCABLE_DEFINED
template<typename... T>
constexpr bool is_invocable()
{
constexpr bool result = std::is_invocable_v<T...>;
static_assert(std::is_invocable<T...>::value == result);
return result;
}
template<typename R, typename... T>
constexpr bool is_invocable_r()
{
constexpr bool result = std::is_invocable_r_v<R, T...>;
static_assert(std::is_invocable_r<R, T...>::value == result);
return result;
}
#endif
void test01()
{
using func_type_v0 = void(*)();
static_assert( is_invocable< func_type_v0 >(), "");
static_assert( is_invocable_r<void, func_type_v0 >(), "");
static_assert( ! is_invocable_r<void*, func_type_v0 >(), "");
static_assert( ! is_invocable_r<int, func_type_v0 >(), "");
static_assert( ! is_invocable< func_type_v0, int >(), "");
static_assert( ! is_invocable_r< void, func_type_v0, int >(), "");
static_assert( ! is_invocable_r< void*, func_type_v0, int >(), "");
static_assert( ! is_invocable_r< int, func_type_v0, int >(), "");
using func_type_i0 = int(*)();
static_assert( is_invocable< func_type_i0 >(), "");
static_assert( is_invocable_r<void, func_type_i0 >(), "");
static_assert( is_invocable_r<int, func_type_i0 >(), "");
static_assert( ! is_invocable_r<int&, func_type_i0 >(), "");
static_assert( is_invocable_r<long, func_type_i0 >(), "");
static_assert( ! is_invocable< func_type_i0, int >(), "");
static_assert( ! is_invocable_r< void, func_type_i0, int >(), "");
static_assert( ! is_invocable_r< int, func_type_i0, int >(), "");
static_assert( ! is_invocable_r< int&, func_type_i0, int >(), "");
static_assert( ! is_invocable_r< long, func_type_i0, int >(), "");
using func_type_l0 = int&(*)();
static_assert( is_invocable< func_type_l0 >(), "");
static_assert( is_invocable_r< void, func_type_l0 >(), "");
static_assert( is_invocable_r< int, func_type_l0 >(), "");
static_assert( is_invocable_r< int&, func_type_l0 >(), "");
static_assert( ! is_invocable_r< int&&, func_type_l0 >(), "");
static_assert( is_invocable_r< long, func_type_l0 >(), "");
static_assert( ! is_invocable_r< long&, func_type_l0 >(), "");
static_assert( ! is_invocable< func_type_l0(int) >(), "");
static_assert( ! is_invocable_r< void, func_type_l0, int >(), "");
static_assert( ! is_invocable_r< int, func_type_l0, int >(), "");
static_assert( ! is_invocable_r< int&, func_type_l0, int >(), "");
static_assert( ! is_invocable_r< long, func_type_l0, int >(), "");
using func_type_ii = int(*)(int);
static_assert( ! is_invocable< func_type_ii >(), "");
static_assert( ! is_invocable_r< int, func_type_ii >(), "");
static_assert( ! is_invocable_r< int&, func_type_ii >(), "");
static_assert( ! is_invocable_r< long, func_type_ii >(), "");
static_assert( is_invocable< func_type_ii, int >(), "");
static_assert( is_invocable_r< int, func_type_ii, int >(), "");
static_assert( ! is_invocable_r< int&, func_type_ii, int >(), "");
static_assert( is_invocable_r< long, func_type_ii, int >(), "");
using func_type_il = int(*)(int&);
static_assert( ! is_invocable< func_type_il >(), "");
static_assert( ! is_invocable< func_type_il, int >(), "");
static_assert( ! is_invocable_r< int, func_type_il, int >(), "");
static_assert( ! is_invocable_r< int&, func_type_il, int >(), "");
static_assert( ! is_invocable_r< long, func_type_il, int >(), "");
static_assert( is_invocable< func_type_il, int& >(), "");
static_assert( is_invocable_r< int, func_type_il, int& >(), "");
static_assert( ! is_invocable_r< int&, func_type_il, int& >(), "");
static_assert( is_invocable_r< long, func_type_il, int& >(), "");
using func_type_ir = int(*)(int&&);
static_assert( ! is_invocable< func_type_ir >(), "");
static_assert( is_invocable< func_type_ir, int >(), "");
static_assert( is_invocable_r< int, func_type_ir, int >(), "");
static_assert( ! is_invocable_r< int&, func_type_ir, int >(), "");
static_assert( is_invocable_r< long, func_type_ir, int >(), "");
static_assert( ! is_invocable< func_type_ir, int& >(), "");
static_assert( ! is_invocable_r< int, func_type_ir, int& >(), "");
static_assert( ! is_invocable_r< int&, func_type_ir, int& >(), "");
static_assert( ! is_invocable_r< long, func_type_ir, int& >(), "");
struct X { };
using mem_type_i = int X::*;
static_assert( ! is_invocable< mem_type_i >(), "");
static_assert( ! is_invocable< mem_type_i, int >(), "");
static_assert( ! is_invocable_r< int, mem_type_i, int >(), "");
static_assert( ! is_invocable_r< int&, mem_type_i, int >(), "");
static_assert( ! is_invocable_r< long, mem_type_i, int >(), "");
static_assert( ! is_invocable< mem_type_i, int& >(), "");
static_assert( ! is_invocable_r< int, mem_type_i, int& >(), "");
static_assert( ! is_invocable_r< int&, mem_type_i, int& >(), "");
static_assert( ! is_invocable_r< long, mem_type_i, int& >(), "");
static_assert( is_invocable< mem_type_i, X& >(), "");
static_assert( is_invocable_r< int, mem_type_i, X& >(), "");
static_assert( is_invocable_r< int&, mem_type_i, X& >(), "");
static_assert( is_invocable_r< long, mem_type_i, X& >(), "");
using memfun_type_i = int (X::*)();
static_assert( ! is_invocable< memfun_type_i >(), "");
static_assert( ! is_invocable< memfun_type_i, int >(), "");
static_assert( ! is_invocable< memfun_type_i, int& >(), "");
static_assert( is_invocable< memfun_type_i, X& >(), "");
static_assert( is_invocable_r< int, memfun_type_i, X& >(), "");
static_assert( ! is_invocable_r< int&, memfun_type_i, X& >(), "");
static_assert( is_invocable_r< long, memfun_type_i, X& >(), "");
static_assert( is_invocable< memfun_type_i, X* >(), "");
static_assert( ! is_invocable< memfun_type_i, const X& >(), "");
static_assert( ! is_invocable_r< int, memfun_type_i, const X& >(), "");
static_assert( ! is_invocable< memfun_type_i, X&, int >(), "");
using memfun_type_iic = int& (X::*)(int&) const;
static_assert( ! is_invocable< memfun_type_iic >(), "");
static_assert( ! is_invocable< memfun_type_iic, int >(), "");
static_assert( ! is_invocable< memfun_type_iic, int& >(), "");
static_assert( ! is_invocable< memfun_type_iic, X&, int >(), "");
static_assert( ! is_invocable< memfun_type_iic, const X&, int >(), "");
static_assert( ! is_invocable< memfun_type_iic, const X&, int&, int >(), "");
static_assert( is_invocable< memfun_type_iic, const X&, int& >(), "");
static_assert( is_invocable_r< int, memfun_type_iic, const X&, int& >(), "");
static_assert( is_invocable_r< int&, memfun_type_iic, const X&, int& >(), "");
static_assert( is_invocable_r< long, memfun_type_iic, const X&, int& >(), "");
static_assert( ! is_invocable_r< long&, memfun_type_iic, const X&, int& >(),"");
static_assert( is_invocable< memfun_type_iic, const X*, int& >(), "");
struct F {
int& operator()();
long& operator()() const;
short& operator()(int) &&;
char& operator()(int) const&;
private:
void operator()(int, int);
};
using CF = const F;
static_assert( is_invocable_r< int&, F >(), "");
static_assert( is_invocable_r< int&, F& >(), "");
static_assert( is_invocable_r< long&, CF >(), "");
static_assert( is_invocable_r< long&, CF& >(), "");
static_assert( is_invocable_r< short&, F, int >(), "");
static_assert( is_invocable_r< char&, F&, int >(), "");
static_assert( is_invocable_r< char&, CF, int >(), "");
static_assert( is_invocable_r< char&, CF&, int >(), "");
static_assert( ! is_invocable< F, int, int >(), "");
}
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