1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // test placement new array
10 
11 #include <new>
12 #include <cassert>
13 #include <cstddef>
14 
15 #include "test_macros.h"
16 
17 int A_constructed = 0;
18 
19 struct A {
20   A() { ++A_constructed; }
21   ~A() { --A_constructed; }
22 };
23 
24 TEST_CONSTEXPR_OPERATOR_NEW void test_direct_call() {
25   assert(::operator new[](sizeof(int), &A_constructed) == &A_constructed);
26 
27   char ch = '*';
28   assert(::operator new[](1, &ch) == &ch);
29   assert(ch == '*');
30 }
31 
32 #ifdef __cpp_lib_constexpr_new
33 static_assert((test_direct_call(), true));
34 #endif
35 
36 int main(int, char**) {
37   const std::size_t Size = 3;
38   // placement new might require additional space.
39   const std::size_t ExtraSize = 64;
40   char buf[Size * sizeof(A) + ExtraSize];
41 
42   A* ap = new (buf) A[Size];
43   assert((char*)ap >= buf);
44   assert((char*)ap < (buf + ExtraSize));
45   assert(A_constructed == Size);
46 
47   test_direct_call();
48   return 0;
49 }
50