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59 lines
1.6 KiB
C++
59 lines
1.6 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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#include "test_macros.h"
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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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int main()
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{
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A a;
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const A ca = A();
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((void)a); // Prevent unused warning
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((void)ca); // Prevent unused warning
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#if TEST_STD_VER < 11
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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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// Libc++'s C++03 implementation of 'forward' cannot accept true non-const
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// rvalues.
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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
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}
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