62 lines
1.2 KiB
C++
62 lines
1.2 KiB
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::set_value(const R& r);
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#include <future>
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#include <cassert>
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struct A
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{
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A() {}
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A(const A&) {throw 10;}
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};
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int main()
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{
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{
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typedef int T;
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T i = 3;
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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(i);
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++i;
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assert(f.get() == 3);
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--i;
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try
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{
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p.set_value(i);
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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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typedef A T;
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T i;
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std::promise<T> p;
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std::future<T> f = p.get_future();
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try
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{
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p.set_value(i);
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assert(false);
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}
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catch (int j)
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{
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assert(j == 10);
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}
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}
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}
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