Files
libcxx/test/std/containers/sequences/array/begin.pass.cpp
Eric Fiselier f3224ac007 [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@324182 91177308-0d34-0410-b5e6-96231b3b80d8
2018-02-04 01:03:08 +00:00

44 lines
1.0 KiB
C++

//===----------------------------------------------------------------------===//
//
// 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>
// iterator begin();
#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<T, 3> C;
C c = {1, 2, 3.5};
C::iterator i;
i = c.begin();
assert(*i == 1);
assert(&*i == c.data());
*i = 5.5;
assert(c[0] == 5.5);
}
{
struct NoDefault {
NoDefault(int) {}
};
typedef NoDefault T;
typedef std::array<T, 0> C;
C c = {};
assert(c.begin() == c.end());
}
}