| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03 |
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| 10 | |
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| 11 | // <functional> |
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| 12 | |
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| 13 | // template<CopyConstructible Fn, CopyConstructible... Types> |
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| 14 | // unspecified bind(Fn, Types...); // constexpr since C++20 |
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| 15 | // template<Returnable R, CopyConstructible Fn, CopyConstructible... Types> |
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| 16 | // unspecified bind(Fn, Types...); // constexpr since C++20 |
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| 17 | |
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| 18 | // https://llvm.org/PR23141 |
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| 19 | #include <functional> |
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| 20 | #include <type_traits> |
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| 21 | |
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| 22 | #include "test_macros.h" |
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| 23 | |
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| 24 | struct Fun { |
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| 25 | template<typename T, typename U> |
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| 26 | TEST_CONSTEXPR_CXX20 void operator()(T &&, U &&) const { |
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| 27 | static_assert(std::is_same<U, int &>::value, "" ); |
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| 28 | } |
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| 29 | }; |
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| 30 | |
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| 31 | TEST_CONSTEXPR_CXX20 bool test() { |
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| 32 | std::bind(f: Fun{}, args: std::placeholders::_1, args: 42)("hello" ); |
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| 33 | return true; |
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| 34 | } |
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| 35 | |
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| 36 | int main(int, char**) { |
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| 37 | test(); |
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| 38 | #if TEST_STD_VER >= 20 |
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| 39 | static_assert(test()); |
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| 40 | #endif |
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| 41 | |
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| 42 | return 0; |
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| 43 | } |
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| 44 | |
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