4684ddb6aa
- import libcxx - reduce targets to the one when compiled as a tools Change-Id: Iabb8427f80ff8e89463559a28bcb8b4f2bdbc496
44 lines
1.1 KiB
C++
44 lines
1.1 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// raw_storage_iterator
|
|
|
|
#include <memory>
|
|
#include <type_traits>
|
|
#include <cassert>
|
|
|
|
int A_constructed = 0;
|
|
|
|
struct A
|
|
{
|
|
int data_;
|
|
public:
|
|
explicit A(int i) : data_(i) {++A_constructed;}
|
|
|
|
A(const A& a) : data_(a.data_) {++A_constructed;}
|
|
~A() {--A_constructed; data_ = 0;}
|
|
|
|
bool operator==(int i) const {return data_ == i;}
|
|
};
|
|
|
|
int main()
|
|
{
|
|
typedef std::aligned_storage<3*sizeof(A), std::alignment_of<A>::value>::type
|
|
Storage;
|
|
Storage buffer;
|
|
std::raw_storage_iterator<A*, A> it((A*)&buffer);
|
|
assert(A_constructed == 0);
|
|
for (int i = 0; i < 3; ++i)
|
|
{
|
|
*it++ = A(i+1);
|
|
A* ap = (A*)&buffer + i;
|
|
assert(*ap == i+1);
|
|
assert(A_constructed == i+1);
|
|
}
|
|
}
|