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Marshall Clow25a7ba42017-11-15 20:02:27 +00001// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
Chandler Carruth57b08b02019-01-19 10:56:40 +00004// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
Marshall Clow25a7ba42017-11-15 20:02:27 +00007//
8//===----------------------------------------------------------------------===//
9
10// <string_view>
11
12// class string_view
13
14// bool empty() const noexcept;
15
Louis Dionne31cbe0f2020-06-01 10:38:23 -040016// UNSUPPORTED: c++03, c++11, c++14, c++17
Marshall Clow25a7ba42017-11-15 20:02:27 +000017
18#include <string_view>
19
20#include "test_macros.h"
21
JF Bastien2df59c52019-02-04 20:31:13 +000022int main(int, char**)
Marshall Clow25a7ba42017-11-15 20:02:27 +000023{
24 std::string_view c;
Louis Dionnea5fa5f72020-03-17 12:27:10 -040025 c.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
JF Bastien2df59c52019-02-04 20:31:13 +000026
Louis Dionneaec82f92020-03-16 14:58:31 -040027 return 0;
Marshall Clow25a7ba42017-11-15 20:02:27 +000028}