Files
libcxx/test/std/containers/sequences/array/array.swap/swap.fail.cpp
Eric Fiselier 6cb35ede81 [libc++] Fix PR35491 - std::array of zero-size doesn't work with non-default constructible types.
Summary:
This patch fixes llvm.org/PR35491 and LWG2157  (https://cplusplus.github.io/LWG/issue2157)

The fix attempts to maintain ABI compatibility by replacing the array with a instance of `aligned_storage`.

Reviewers: mclow.lists, EricWF

Reviewed By: EricWF

Subscribers: lichray, cfe-commits

Differential Revision: https://reviews.llvm.org/D41223

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@324526 91177308-0d34-0410-b5e6-96231b3b80d8
2018-02-07 21:06:13 +00:00

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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <array>
// void swap(array& a);
#include <array>
#include <cassert>
// std::array is explicitly allowed to be initialized with A a = { init-list };.
// Disable the missing braces warning for this reason.
#include "disable_missing_braces_warning.h"
int main() {
{
typedef double T;
typedef std::array<const T, 0> C;
C c = {};
C c2 = {};
// expected-error-re@array:* {{static_assert failed {{.*}} "cannot swap zero-sized array of type 'const T'"}}
c.swap(c2); // expected-note {{requested here}}
}
}