47 lines
1.0 KiB
C++
47 lines
1.0 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 packaged_task<R(ArgTypes...)>
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// packaged_task(packaged_task&) = delete;
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#include <future>
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#include <cassert>
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class A
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{
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long data_;
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public:
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explicit A(long i) : data_(i) {}
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long operator()(long i, long j) const {return data_ + i + j;}
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};
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int main()
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{
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{
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std::packaged_task<double(int, char)> p0(A(5));
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std::packaged_task<double(int, char)> p(p0);
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assert(!p0);
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assert(p);
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std::future<double> f = p.get_future();
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p(3, 'a');
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assert(f.get() == 105.0);
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}
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{
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std::packaged_task<double(int, char)> p0;
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std::packaged_task<double(int, char)> p(p0);
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assert(!p0);
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assert(!p);
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}
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}
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