raw_storag_iterator.pass.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// raw_storage_iterator
11
12#include <memory>
13#include <type_traits>
14#include <cassert>
15
16int A_constructed = 0;
17
18struct A
19{
20    int data_;
21public:
22    explicit A(int i) : data_(i) {++A_constructed;}
23
24    A(const A& a) : data_(a.data_)  {++A_constructed;}
25    ~A() {--A_constructed; data_ = 0;}
26
27    bool operator==(int i) const {return data_ == i;}
28};
29
30int main()
31{
32    typedef std::aligned_storage<3*sizeof(A), std::alignment_of<A>::value>::type
33            Storage;
34    Storage buffer;
35    std::raw_storage_iterator<A*, A> it((A*)&buffer);
36    assert(A_constructed == 0);
37    for (int i = 0; i < 3; ++i)
38    {
39        *it++ = A(i+1);
40        A* ap = (A*)&buffer + i;
41        assert(*ap == i+1);
42        assert(A_constructed == i+1);
43    }
44}
45