a7f9895cc1
Since those features are general properties of the environment, it makes sense to use them from libc++abi too, and so the name libcpp-has-no-xxx doesn't make sense. Differential Revision: https://reviews.llvm.org/D126482
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
//===----------------------------------------------------------------------===//
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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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//
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// UNSUPPORTED: no-threads
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// <future>
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// template <class F, class... Args>
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// future<typename result_of<F(Args...)>::type>
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// async(F&& f, Args&&... args);
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// template <class F, class... Args>
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// future<typename result_of<F(Args...)>::type>
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// async(launch policy, F&& f, Args&&... args);
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#include <future>
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#include <atomic>
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#include <memory>
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#include <cassert>
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#include "test_macros.h"
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int foo (int x) { return x; }
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int main(int, char**)
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{
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std::async( foo, 3); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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std::async(std::launch::async, foo, 3); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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return 0;
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}
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