01a0e90783
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@186344 91177308-0d34-0410-b5e6-96231b3b80d8
81 lines
2.6 KiB
C++
81 lines
2.6 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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// test forward
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#include <utility>
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#include <cassert>
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struct A
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{
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};
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A source() {return A();}
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const A csource() {return A();}
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typedef char one;
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struct two {one _[2];};
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struct four {one _[4];};
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struct eight {one _[8];};
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one test(A&);
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two test(const A&);
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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four test(A&&);
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eight test(const A&&);
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#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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int main()
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{
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A a;
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const A ca = A();
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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static_assert(sizeof(test(std::forward<A&>(a))) == 1, "");
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static_assert(sizeof(test(std::forward<A>(a))) == 4, "");
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static_assert(sizeof(test(std::forward<A>(source()))) == 4, "");
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static_assert(sizeof(test(std::forward<const A&>(a))) == 2, "");
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// static_assert(sizeof(test(std::forward<const A&>(source()))) == 2, "");
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static_assert(sizeof(test(std::forward<const A>(a))) == 8, "");
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static_assert(sizeof(test(std::forward<const A>(source()))) == 8, "");
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static_assert(sizeof(test(std::forward<const A&>(ca))) == 2, "");
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// static_assert(sizeof(test(std::forward<const A&>(csource()))) == 2, "");
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static_assert(sizeof(test(std::forward<const A>(ca))) == 8, "");
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static_assert(sizeof(test(std::forward<const A>(csource()))) == 8, "");
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#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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static_assert(sizeof(test(std::forward<A&>(a))) == 1, "");
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static_assert(sizeof(test(std::forward<A>(a))) == 1, "");
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// static_assert(sizeof(test(std::forward<A>(source()))) == 2, "");
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static_assert(sizeof(test(std::forward<const A&>(a))) == 2, "");
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static_assert(sizeof(test(std::forward<const A&>(source()))) == 2, "");
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static_assert(sizeof(test(std::forward<const A>(a))) == 2, "");
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static_assert(sizeof(test(std::forward<const A>(source()))) == 2, "");
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static_assert(sizeof(test(std::forward<const A&>(ca))) == 2, "");
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static_assert(sizeof(test(std::forward<const A&>(csource()))) == 2, "");
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static_assert(sizeof(test(std::forward<const A>(ca))) == 2, "");
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static_assert(sizeof(test(std::forward<const A>(csource()))) == 2, "");
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#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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#if _LIBCPP_STD_VER > 11
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constexpr int i1 = std::move(23);
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static_assert(i1 == 23, "" );
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constexpr int i2 = std::forward<int>(42);
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static_assert(i2 == 42, "" );
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#endif
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}
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