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
23 template <class R, class F>
24 TEST_CONSTEXPR_CXX20
test(F f,R expected)25 void test(F f, R expected) {
26 assert(f() == expected);
27 }
28
29 template <class R, class F>
30 TEST_CONSTEXPR_CXX20
test_const(const F & f,R expected)31 void test_const(const F& f, R expected) {
32 assert(f() == expected);
33 }
34
f()35 TEST_CONSTEXPR_CXX20 int f() {return 1;}
36
37 struct A_int_0 {
operator ()A_int_038 TEST_CONSTEXPR_CXX20 int operator()() {return 4;}
operator ()A_int_039 TEST_CONSTEXPR_CXX20 int operator()() const {return 5;}
40 };
41
test_all()42 TEST_CONSTEXPR_CXX20 bool test_all() {
43 test(std::bind(f), 1);
44 test(std::bind(&f), 1);
45 test(std::bind(A_int_0()), 4);
46 test_const(std::bind(A_int_0()), 5);
47
48 test(std::bind<int>(f), 1);
49 test(std::bind<int>(&f), 1);
50 test(std::bind<int>(A_int_0()), 4);
51 test_const(std::bind<int>(A_int_0()), 5);
52 return true;
53 }
54
main(int,char **)55 int 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