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// <iterator>
10
11// template<class T>
12// struct iterator_traits<T*>
13// {
14// typedef ptrdiff_t difference_type;
15// typedef T value_type;
16// typedef T* pointer;
17// typedef T& reference;
18// typedef random_access_iterator_tag iterator_category;
19// typedef contiguous_iterator_tag iterator_category; // C++20
20// };
21
22#include <iterator>
23#include <type_traits>
24
25#include "test_macros.h"
26
27struct A {};
28
29int main(int, char**)
30{
31 typedef std::iterator_traits<A*> It;
32 static_assert((std::is_same<It::difference_type, std::ptrdiff_t>::value), "");
33 static_assert((std::is_same<It::value_type, A>::value), "");
34 static_assert((std::is_same<It::pointer, A*>::value), "");
35 static_assert((std::is_same<It::reference, A&>::value), "");
36 static_assert((std::is_same<It::iterator_category, std::random_access_iterator_tag>::value), "");
37#if TEST_STD_VER > 17
38 ASSERT_SAME_TYPE(It::iterator_concept, std::contiguous_iterator_tag);
39#endif
40 return 0;
41}
42

source code of libcxx/test/std/iterators/iterator.primitives/iterator.traits/pointer.pass.cpp