//===----------------------------------------------------------------------===// // // 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 // { // typedef Alloc::pointer | value_type* pointer; // ... // }; #include <memory> #include <type_traits> template <class T> struct Ptr {}; template <class T> struct A { typedef T value_type; typedef Ptr<T> pointer; }; template <class T> struct B { typedef T value_type; }; int main() { static_assert((std::is_same<std::allocator_traits<A<char> >::pointer, Ptr<char> >::value), ""); static_assert((std::is_same<std::allocator_traits<B<char> >::pointer, char*>::value), ""); }