38 lines
855 B
C++
38 lines
855 B
C++
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <future>
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// class promise<R>
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// void promise<void>::set_value();
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#include <future>
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#include <cassert>
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int main()
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{
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{
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typedef void T;
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std::promise<T> p;
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std::future<T> f = p.get_future();
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p.set_value();
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f.get();
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try
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{
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p.set_value();
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assert(false);
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}
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catch (const std::future_error& e)
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{
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assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied));
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}
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}
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}
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