90 lines
2.7 KiB
C++
90 lines
2.7 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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// <future>
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// class promise<R>
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// promise& operator=(promise&& rhs);
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#include <future>
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#include <cassert>
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#include "../test_allocator.h"
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int main()
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{
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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assert(test_alloc_base::count == 0);
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{
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std::promise<int> p0(std::allocator_arg, test_allocator<int>());
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std::promise<int> p(std::allocator_arg, test_allocator<int>());
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assert(test_alloc_base::count == 2);
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p = std::move(p0);
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assert(test_alloc_base::count == 1);
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std::future<int> f = p.get_future();
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assert(test_alloc_base::count == 1);
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assert(f.valid());
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try
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{
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f = p0.get_future();
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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::no_state));
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}
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assert(test_alloc_base::count == 1);
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}
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assert(test_alloc_base::count == 0);
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{
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std::promise<int&> p0(std::allocator_arg, test_allocator<int>());
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std::promise<int&> p(std::allocator_arg, test_allocator<int>());
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assert(test_alloc_base::count == 2);
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p = std::move(p0);
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assert(test_alloc_base::count == 1);
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std::future<int&> f = p.get_future();
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assert(test_alloc_base::count == 1);
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assert(f.valid());
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try
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{
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f = p0.get_future();
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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::no_state));
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}
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assert(test_alloc_base::count == 1);
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}
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assert(test_alloc_base::count == 0);
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{
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std::promise<void> p0(std::allocator_arg, test_allocator<void>());
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std::promise<void> p(std::allocator_arg, test_allocator<void>());
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assert(test_alloc_base::count == 2);
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p = std::move(p0);
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assert(test_alloc_base::count == 1);
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std::future<void> f = p.get_future();
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assert(test_alloc_base::count == 1);
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assert(f.valid());
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try
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{
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f = p0.get_future();
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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::no_state));
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}
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assert(test_alloc_base::count == 1);
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}
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assert(test_alloc_base::count == 0);
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#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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}
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