uninitialized_fill_n.pass.cpp revision bc8d3f97eb5c958007f2713238472e0c1c8fe02c 
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// <memory>
11
12// template <class ForwardIterator, class Size, class T>
13//   void
14//   uninitialized_fill_n(ForwardIterator first, Size n, const T& x);
15
16#include <memory>
17#include <cassert>
18
19struct B
20{
21    static int count_;
22    int data_;
23    explicit B() : data_(1) {}
24    B(const B& b) {if (++count_ == 3) throw 1; data_ = b.data_;}
25    ~B() {data_ = 0;}
26};
27
28int B::count_ = 0;
29
30int main()
31{
32    const int N = 5;
33    char pool[sizeof(B)*N] = {0};
34    B* bp = (B*)pool;
35    try
36    {
37        std::uninitialized_fill_n(bp, 5, B());
38        assert(false);
39    }
40    catch (...)
41    {
42        for (int i = 0; i < N; ++i)
43            assert(bp[i].data_ == 0);
44    }
45    B::count_ = 0;
46    std::uninitialized_fill_n(bp, 2, B());
47    for (int i = 0; i < 2; ++i)
48        assert(bp[i].data_ == 1);
49}
50