000f25a37e
These functions are key to allowing the use of rvalues and variadics
in C++03 mode. Everything works the same as in C++11, except for one
tangentially related case:
struct T {
T(T &&) = default;
};
In C++11, T has a deleted copy constructor. But in C++03 Clang gives
it both a move and a copy constructor. This seems reasonable enough
given the extensions it's using.
The other changes in this patch were the minimal set required
to keep the tests passing after the move/forward change. Most notably
the removal of the `__rv<unique_ptr>` hack that was present
in an attempt to make unique_ptr move only without language support.
llvm-svn: 364063
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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 "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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int main(int, char**)
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{
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{
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std::forward<A&>(source()); // expected-note {{requested here}}
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// expected-error-re@type_traits:* 1 {{static_assert failed{{.*}} "can not forward an rvalue as an lvalue"}}
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}
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{
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const A ca = A();
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std::forward<A&>(ca); // expected-error {{no matching function for call to 'forward'}}
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}
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{
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std::forward<A&>(csource()); // expected-error {{no matching function for call to 'forward'}}
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}
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{
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const A ca = A();
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std::forward<A>(ca); // expected-error {{no matching function for call to 'forward'}}
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}
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{
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std::forward<A>(csource()); // expected-error {{no matching function for call to 'forward'}}
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}
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{
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A a;
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std::forward(a); // expected-error {{no matching function for call to 'forward'}}
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}
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return 0;
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}
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