diff options
Diffstat (limited to 'test/std/thread/futures/futures.async/async.fail.cpp')
-rw-r--r-- | test/std/thread/futures/futures.async/async.fail.cpp | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/test/std/thread/futures/futures.async/async.fail.cpp b/test/std/thread/futures/futures.async/async.fail.cpp new file mode 100644 index 000000000000..594c67f52699 --- /dev/null +++ b/test/std/thread/futures/futures.async/async.fail.cpp @@ -0,0 +1,38 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// UNSUPPORTED: libcpp-has-no-threads +// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 +// UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8 + +// <future> + +// template <class F, class... Args> +// future<typename result_of<F(Args...)>::type> +// async(F&& f, Args&&... args); + +// template <class F, class... Args> +// future<typename result_of<F(Args...)>::type> +// async(launch policy, F&& f, Args&&... args); + + +#include <future> +#include <atomic> +#include <memory> +#include <cassert> + +#include "test_macros.h" + +int foo (int x) { return x; } + +int main () +{ + std::async( foo, 3); // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}} + std::async(std::launch::async, foo, 3); // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}} +}
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