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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <iterator>
// template<class Category, class T, class Distance = ptrdiff_t,
// class Pointer = T*, class Reference = T&>
// struct iterator
// {
// typedef T value_type;
// typedef Distance difference_type;
// typedef Pointer pointer;
// typedef Reference reference;
// typedef Category iterator_category;
// };
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
#include <iterator>
#include <type_traits>
#include "test_macros.h"
struct A {};
template <class T>
void
test2()
{
typedef std::iterator<std::forward_iterator_tag, T> It;
static_assert((std::is_same<typename It::value_type, T>::value), "");
static_assert((std::is_same<typename It::difference_type, std::ptrdiff_t>::value), "");
static_assert((std::is_same<typename It::pointer, T*>::value), "");
static_assert((std::is_same<typename It::reference, T&>::value), "");
static_assert((std::is_same<typename It::iterator_category, std::forward_iterator_tag>::value), "");
}
template <class T>
void
test3()
{
typedef std::iterator<std::bidirectional_iterator_tag, T, short> It;
static_assert((std::is_same<typename It::value_type, T>::value), "");
static_assert((std::is_same<typename It::difference_type, short>::value), "");
static_assert((std::is_same<typename It::pointer, T*>::value), "");
static_assert((std::is_same<typename It::reference, T&>::value), "");
static_assert((std::is_same<typename It::iterator_category, std::bidirectional_iterator_tag>::value), "");
}
template <class T>
void
test4()
{
typedef std::iterator<std::random_access_iterator_tag, T, int, const T*> It;
static_assert((std::is_same<typename It::value_type, T>::value), "");
static_assert((std::is_same<typename It::difference_type, int>::value), "");
static_assert((std::is_same<typename It::pointer, const T*>::value), "");
static_assert((std::is_same<typename It::reference, T&>::value), "");
static_assert((std::is_same<typename It::iterator_category, std::random_access_iterator_tag>::value), "");
}
template <class T>
void
test5()
{
typedef std::iterator<std::input_iterator_tag, T, long, const T*, const T&> It;
static_assert((std::is_same<typename It::value_type, T>::value), "");
static_assert((std::is_same<typename It::difference_type, long>::value), "");
static_assert((std::is_same<typename It::pointer, const T*>::value), "");
static_assert((std::is_same<typename It::reference, const T&>::value), "");
static_assert((std::is_same<typename It::iterator_category, std::input_iterator_tag>::value), "");
}
int main(int, char**)
{
test2<A>();
test3<A>();
test4<A>();
test5<A>();
return 0;
}
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