1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03
10
11// <functional>
12
13// template<CopyConstructible Fn, CopyConstructible... Types>
14// unspecified bind(Fn, Types...); // constexpr since C++20
15// template<Returnable R, CopyConstructible Fn, CopyConstructible... Types>
16// unspecified bind(Fn, Types...); // constexpr since C++20
17
18#include <functional>
19#include <cassert>
20
21#include "test_macros.h"
22
23template <class R, class F>
24TEST_CONSTEXPR_CXX20
25void test(F f, R expected) {
26 assert(f() == expected);
27}
28
29template <class R, class F>
30TEST_CONSTEXPR_CXX20
31void test_const(const F& f, R expected) {
32 assert(f() == expected);
33}
34
35TEST_CONSTEXPR_CXX20 int f() {return 1;}
36
37struct A_int_0 {
38 TEST_CONSTEXPR_CXX20 int operator()() {return 4;}
39 TEST_CONSTEXPR_CXX20 int operator()() const {return 5;}
40};
41
42TEST_CONSTEXPR_CXX20 bool test_all() {
43 test(std::bind(f), 1);
44 test(std::bind(&f), 1);
45 test(std::bind(f: A_int_0()), 4);
46 test_const(std::bind(f: A_int_0()), 5);
47
48 test(std::bind<int>(f), 1);
49 test(std::bind<int>(&f), 1);
50 test(std::bind<int>(f: A_int_0()), 4);
51 test_const(std::bind<int>(f: A_int_0()), 5);
52 return true;
53}
54
55int main(int, char**) {
56 test_all();
57#if TEST_STD_VER >= 20
58 static_assert(test_all());
59#endif
60
61 return 0;
62}
63

source code of libcxx/test/std/utilities/function.objects/bind/func.bind/func.bind.bind/invoke_int_0.pass.cpp