1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <memory> 11 12 // template <class ForwardIterator, class Size, class T> 13 // ForwardIterator 14 // uninitialized_fill_n(ForwardIterator first, Size n, const T& x); 15 16 #include <memory> 17 #include <cassert> 18 19 struct 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 28 int B::count_ = 0; 29 30 int 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 B* r = std::uninitialized_fill_n(bp, 2, B()); 47 assert(r == bp + 2); 48 for (int i = 0; i < 2; ++i) 49 assert(bp[i].data_ == 1); 50 } 51
