| 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, c++11, c++14, c++17, c++20, c++23 |
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| 10 | |
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| 11 | // <functional> |
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| 12 | |
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| 13 | // template<auto f> constexpr unspecified not_fn() noexcept; |
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| 14 | // Mandates: If is_pointer_v<F> || is_member_pointer_v<F> is true, then f != nullptr is true. |
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| 15 | |
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| 16 | #include <functional> |
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| 17 | |
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| 18 | struct X {}; |
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| 19 | |
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| 20 | void test() { |
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| 21 | auto not_fn1 = std::not_fn<static_cast<bool (*)()>(nullptr)>(); |
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| 22 | // expected-error@*:* {{static assertion failed due to requirement 'nullptr != nullptr': f cannot be equal to nullptr}} |
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| 23 | |
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| 24 | auto not_fn2 = std::not_fn<static_cast<bool X::*>(nullptr)>(); |
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| 25 | // expected-error@*:* {{static assertion failed due to requirement 'nullptr != nullptr': f cannot be equal to nullptr}} |
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| 26 | |
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| 27 | auto not_fn3 = std::not_fn<static_cast<bool (X::*)()>(nullptr)>(); |
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| 28 | // expected-error@*:* {{static assertion failed due to requirement 'nullptr != nullptr': f cannot be equal to nullptr}} |
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| 29 | } |
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| 30 | |
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