| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // template <class Alloc> |
| // struct allocator_traits |
| // { |
| // template <class Ptr, class... Args> |
| // static void construct(allocator_type& a, Ptr p, Args&&... args); |
| // ... |
| // }; |
| |
| #include <memory> |
| #include <new> |
| #include <type_traits> |
| #include <cassert> |
| |
| template <class T> |
| struct A |
| { |
| typedef T value_type; |
| |
| }; |
| |
| int b_construct = 0; |
| |
| template <class T> |
| struct B |
| { |
| typedef T value_type; |
| |
| #ifndef _LIBCPP_HAS_NO_VARIADICS |
| template <class U, class ...Args> |
| void construct(U* p, Args&& ...args) |
| { |
| ++b_construct; |
| ::new ((void*)p) U(std::forward<Args>(args)...); |
| } |
| #endif // _LIBCPP_HAS_NO_VARIADICS |
| }; |
| |
| struct A0 |
| { |
| static int count; |
| A0() {++count;} |
| }; |
| |
| int A0::count = 0; |
| |
| struct A1 |
| { |
| static int count; |
| A1(char c) |
| { |
| assert(c == 'c'); |
| ++count; |
| } |
| }; |
| |
| int A1::count = 0; |
| |
| struct A2 |
| { |
| static int count; |
| A2(char c, int i) |
| { |
| assert(c == 'd'); |
| assert(i == 5); |
| ++count; |
| } |
| }; |
| |
| int A2::count = 0; |
| |
| int main() |
| { |
| { |
| A0::count = 0; |
| A<int> a; |
| std::aligned_storage<sizeof(A0)>::type a0; |
| assert(A0::count == 0); |
| std::allocator_traits<A<int> >::construct(a, (A0*)&a0); |
| assert(A0::count == 1); |
| } |
| { |
| A1::count = 0; |
| A<int> a; |
| std::aligned_storage<sizeof(A1)>::type a1; |
| assert(A1::count == 0); |
| std::allocator_traits<A<int> >::construct(a, (A1*)&a1, 'c'); |
| assert(A1::count == 1); |
| } |
| { |
| A2::count = 0; |
| A<int> a; |
| std::aligned_storage<sizeof(A2)>::type a2; |
| assert(A2::count == 0); |
| std::allocator_traits<A<int> >::construct(a, (A2*)&a2, 'd', 5); |
| assert(A2::count == 1); |
| } |
| #ifndef _LIBCPP_HAS_NO_VARIADICS |
| { |
| A0::count = 0; |
| b_construct = 0; |
| B<int> b; |
| std::aligned_storage<sizeof(A0)>::type a0; |
| assert(A0::count == 0); |
| assert(b_construct == 0); |
| std::allocator_traits<B<int> >::construct(b, (A0*)&a0); |
| assert(A0::count == 1); |
| assert(b_construct == 1); |
| } |
| { |
| A1::count = 0; |
| b_construct = 0; |
| B<int> b; |
| std::aligned_storage<sizeof(A1)>::type a1; |
| assert(A1::count == 0); |
| assert(b_construct == 0); |
| std::allocator_traits<B<int> >::construct(b, (A1*)&a1, 'c'); |
| assert(A1::count == 1); |
| assert(b_construct == 1); |
| } |
| { |
| A2::count = 0; |
| b_construct = 0; |
| B<int> b; |
| std::aligned_storage<sizeof(A2)>::type a2; |
| assert(A2::count == 0); |
| assert(b_construct == 0); |
| std::allocator_traits<B<int> >::construct(b, (A2*)&a2, 'd', 5); |
| assert(A2::count == 1); |
| assert(b_construct == 1); |
| } |
| #endif // _LIBCPP_HAS_NO_VARIADICS |
| } |