| 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 | // <regex> |
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| 10 | |
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| 11 | // class match_results<BidirectionalIterator, Allocator> |
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| 12 | // bool empty() const; |
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| 13 | |
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| 14 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 15 | |
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| 16 | #include <regex> |
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| 17 | |
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| 18 | void f() { |
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| 19 | std::match_results<const char*> c; |
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| 20 | c.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} |
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| 21 | } |
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| 22 | |
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