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); 16 // ... 17 // }; 18 19 #include <memory> 20 #include <new> 21 #include <type_traits> 22 #include <cassert> 23 24 template <class T> 25 struct A 26 { 27 typedef T value_type; 28 29 }; 30 31 template <class T> 32 struct B 33 { 34 typedef T value_type; 35 36 size_t max_size() const 37 { 38 return 100; 39 } 40 }; 41 42 int main() 43 { 44 #ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE 45 { 46 A<int> a; 47 assert(std::allocator_traits<A<int> >::max_size(a) == 48 std::numeric_limits<std::size_t>::max()); 49 } 50 { 51 const A<int> a = {}; 52 assert(std::allocator_traits<A<int> >::max_size(a) == 53 std::numeric_limits<std::size_t>::max()); 54 } 55 #endif // _LIBCPP_HAS_NO_ADVANCED_SFINAE 56 { 57 B<int> b; 58 assert(std::allocator_traits<B<int> >::max_size(b) == 100); 59 } 60 { 61 const B<int> b = {}; 62 assert(std::allocator_traits<B<int> >::max_size(b) == 100); 63 } 64 } 65
