llvm-project

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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <set>
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// class set
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// bool empty() const noexcept;
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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#include <set>
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void f() {
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    std::set<int> c;
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    c.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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