| 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 | // REQUIRES: std-at-least-c++23 |
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| 10 | |
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| 11 | // <utility> |
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| 12 | |
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| 13 | // template <typename T> |
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| 14 | // [[nodiscard]] constexpr |
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| 15 | // auto forward_like(auto&& x) noexcept -> see below; |
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| 16 | |
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| 17 | // Mandates: T is a referenceable type (3.45 [defns.referenceable]). |
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| 18 | |
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| 19 | #include <utility> |
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| 20 | |
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| 21 | struct incomplete; |
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| 22 | |
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| 23 | void test() { |
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| 24 | int i; |
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| 25 | (void)std::forward_like<incomplete>(i); |
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| 26 | |
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| 27 | (void)std::forward_like<void>(i); // expected-error {{no matching function for call to 'forward_like'}} |
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| 28 | (void)std::forward_like<const void>(i); // expected-error {{no matching function for call to 'forward_like'}} |
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| 29 | (void)std::forward_like<volatile void>(i); // expected-error {{no matching function for call to 'forward_like'}} |
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| 30 | (void)std::forward_like<const volatile void>(i); // expected-error {{no matching function for call to 'forward_like'}} |
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| 31 | |
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| 32 | using fp = void(); |
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| 33 | using cfp = void() const; |
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| 34 | using vfp = void() volatile; |
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| 35 | using cvfp = void() const volatile; |
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| 36 | (void)std::forward_like<fp>(i); |
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| 37 | (void)std::forward_like<cfp>(i); // expected-error {{no matching function for call to 'forward_like'}} |
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| 38 | (void)std::forward_like<cfp>(i); // expected-error {{no matching function for call to 'forward_like'}} |
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| 39 | (void)std::forward_like<vfp>(i); // expected-error {{no matching function for call to 'forward_like'}} |
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| 40 | (void)std::forward_like<cvfp>(i); // expected-error {{no matching function for call to 'forward_like'}} |
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| 41 | |
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| 42 | using fpr = void()&; |
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| 43 | using fprr = void()&&; |
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| 44 | (void)std::forward_like<fpr>(i); // expected-error {{no matching function for call to 'forward_like'}} |
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| 45 | (void)std::forward_like<fprr>(i); // expected-error {{no matching function for call to 'forward_like'}} |
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| 46 | } |
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| 47 | |
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