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 // raw_storage_iterator 11 12 #include <memory> 13 #include <type_traits> 14 #include <cassert> 15 16 #include "test_macros.h" 17 #include <MoveOnly.h> 18 19 int A_constructed = 0; 20 21 struct A 22 { 23 int data_; 24 public: 25 explicit A(int i) : data_(i) {++A_constructed;} 26 27 A(const A& a) : data_(a.data_) {++A_constructed;} 28 ~A() {--A_constructed; data_ = 0;} 29 30 bool operator==(int i) const {return data_ == i;} 31 }; 32 33 int main() 34 { 35 { 36 typedef A S; 37 typedef std::aligned_storage<3*sizeof(S), std::alignment_of<S>::value>::type 38 Storage; 39 Storage buffer; 40 std::raw_storage_iterator<S*, S> it((S*)&buffer); 41 assert(A_constructed == 0); 42 for (int i = 0; i < 3; ++i) 43 { 44 *it++ = S(i+1); 45 S* ap = (S*)&buffer + i; 46 assert(*ap == i+1); 47 assert(A_constructed == i+1); 48 } 49 } 50 #if TEST_STD_VER >= 14 51 { 52 typedef MoveOnly S; 53 typedef std::aligned_storage<3*sizeof(S), std::alignment_of<S>::value>::type 54 Storage; 55 Storage buffer; 56 std::raw_storage_iterator<S*, S> it((S*)&buffer); 57 S m{1}; 58 *it++ = std::move(m); 59 assert(m.get() == 0); // moved from 60 S *ap = (S*) &buffer; 61 assert(ap->get() == 1); // original value 62 } 63 #endif 64 } 65
