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c538ab0daa
test/std almost always uses spaces; now it is entirely tab-free. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@329978 91177308-0d34-0410-b5e6-96231b3b80d8
39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// UNSUPPORTED: libcpp-has-no-threads
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// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
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// UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8
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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 ()
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{
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std::async( foo, 3); // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}}
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std::async(std::launch::async, foo, 3); // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}}
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}
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