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 Alloc> 13 // struct allocator_traits 14 // { 15 // static size_type max_size(const allocator_type& a) noexcept; 16 // ... 17 // }; 18 19 #include <memory> 20 #include <new> 21 #include <type_traits> 22 #include <cassert> 23 24 #include "test_macros.h" 25 26 template <class T> 27 struct A 28 { 29 typedef T value_type; 30 31 }; 32 33 template <class T> 34 struct B 35 { 36 typedef T value_type; 37 38 size_t max_size() const 39 { 40 return 100; 41 } 42 }; 43 44 int main() 45 { 46 { 47 B<int> b; 48 assert(std::allocator_traits<B<int> >::max_size(b) == 100); 49 } 50 { 51 const B<int> b = {}; 52 assert(std::allocator_traits<B<int> >::max_size(b) == 100); 53 } 54 #if TEST_STD_VER >= 11 55 { 56 A<int> a; 57 assert(std::allocator_traits<A<int> >::max_size(a) == 58 std::numeric_limits<std::size_t>::max() / sizeof(int)); 59 } 60 { 61 const A<int> a = {}; 62 assert(std::allocator_traits<A<int> >::max_size(a) == 63 std::numeric_limits<std::size_t>::max() / sizeof(int)); 64 } 65 { 66 std::allocator<int> a; 67 static_assert(noexcept(std::allocator_traits<std::allocator<int>>::max_size(a)) == true, ""); 68 } 69 #endif 70 } 71
