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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// <functional>
// template<CopyConstructible Fn, CopyConstructible... Types>
// unspecified bind(Fn, Types...); // constexpr since C++20
// template<Returnable R, CopyConstructible Fn, CopyConstructible... Types>
// unspecified bind(Fn, Types...); // constexpr since C++20
#include <functional>
#include <cassert>
#include "test_macros.h"
template <class R, class F>
TEST_CONSTEXPR_CXX20
void test(F f, R expected) {
assert(f() == expected);
}
template <class R, class F>
TEST_CONSTEXPR_CXX20
void test_const(const F& f, R expected) {
assert(f() == expected);
}
TEST_CONSTEXPR_CXX20 int f() {return 1;}
struct A_int_0 {
TEST_CONSTEXPR_CXX20 int operator()() {return 4;}
TEST_CONSTEXPR_CXX20 int operator()() const {return 5;}
};
TEST_CONSTEXPR_CXX20 bool test_all() {
test(std::bind(f), 1);
test(std::bind(&f), 1);
test(std::bind(A_int_0()), 4);
test_const(std::bind(A_int_0()), 5);
test(std::bind<int>(f), 1);
test(std::bind<int>(&f), 1);
test(std::bind<int>(A_int_0()), 4);
test_const(std::bind<int>(A_int_0()), 5);
return true;
}
int main(int, char**) {
test_all();
#if TEST_STD_VER >= 20
static_assert(test_all());
#endif
return 0;
}
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