a template for a bidirectional iterator for the basic_json class This class implements a both iterators (iterator and const_iterator) for the basic_json class. 更多...

#include <json.hpp>

detail::iter_impl< BasicJsonType > 的协作图:

[图例]

Public 类型
using	iterator_category = std::bidirectional_iterator_tag

using	value_type = typename BasicJsonType::value_type
	the type of the values when the iterator is dereferenced

using	difference_type = typename BasicJsonType::difference_type
	a type to represent differences between iterators

using	pointer
	defines a pointer to the type iterated over (value_type)

using	reference
	defines a reference to the type iterated over (value_type)

Public 成员函数
	iter_impl ()=default

	~iter_impl ()=default

	iter_impl (iter_impl &&) noexcept=default

iter_impl &	operator= (iter_impl &&) noexcept=default

	iter_impl (pointer object) noexcept
	constructor for a given JSON instance

	iter_impl (const iter_impl< const BasicJsonType > &other) noexcept
	const copy constructor

iter_impl &	operator= (const iter_impl< const BasicJsonType > &other) noexcept
	converting assignment

	iter_impl (const iter_impl< typename std::remove_const< BasicJsonType >::type > &other) noexcept
	converting constructor

iter_impl &	operator= (const iter_impl< typename std::remove_const< BasicJsonType >::type > &other) noexcept
	converting assignment

	switch (m_object->m_data.m_type)

void	set_end () noexcept
	set the iterator past the last value

reference	operator* () const
	return a reference to the value pointed to by the iterator

pointer	operator-> () const
	dereference the iterator

iter_impl	operator++ (int) &
	post-increment (it++)

iter_impl &	operator++ ()
	pre-increment (++it)

iter_impl	operator-- (int) &
	post-decrement (it–)

iter_impl &	operator-- ()
	pre-decrement (–it)

template<typename IterImpl , detail::enable_if_t<(std::is_same< IterImpl, iter_impl >::value\|\|std::is_same< IterImpl, other_iter_impl >::value), std::nullptr_t > = nullptr>
bool	operator== (const IterImpl &other) const
	comparison: equal

template<typename IterImpl , detail::enable_if_t<(std::is_same< IterImpl, iter_impl >::value\|\|std::is_same< IterImpl, other_iter_impl >::value), std::nullptr_t > = nullptr>
bool	operator!= (const IterImpl &other) const
	comparison: not equal

bool	operator< (const iter_impl &other) const
	comparison: smaller

bool	operator<= (const iter_impl &other) const
	comparison: less than or equal

bool	operator> (const iter_impl &other) const
	comparison: greater than

bool	operator>= (const iter_impl &other) const
	comparison: greater than or equal

iter_impl &	operator+= (difference_type i)
	add to iterator

iter_impl &	operator-= (difference_type i)
	subtract from iterator

iter_impl	operator+ (difference_type i) const
	add to iterator

iter_impl	operator- (difference_type i) const
	subtract from iterator

difference_type	operator- (const iter_impl &other) const
	return difference

reference	operator[] (difference_type n) const
	access to successor

const object_t::key_type &	key () const
	return the key of an object iterator

reference	value () const
	return the value of an iterator

Public 属性
JSON_PRIVATE_UNLESS_TESTED	: void set_begin() noexcept { JSON_ASSERT(m_object != nullptr)

JSON_PRIVATE_UNLESS_TESTED	: pointer m_object = nullptr

internal_iterator< typename std::remove_const< BasicJsonType >::type >	m_it {}
	the actual iterator of the associated instance

Private 类型
using	other_iter_impl = iter_impl<typename std::conditional<std::is_const<BasicJsonType>::value, typename std::remove_const<BasicJsonType>::type, const BasicJsonType>::type>
	the iterator with BasicJsonType of different const-ness

using	object_t = typename BasicJsonType::object_t

using	array_t = typename BasicJsonType::array_t

Private 属性
friend	other_iter_impl
	allow basic_json to access private members

friend	BasicJsonType

friend	iteration_proxy< iter_impl >

friend	iteration_proxy_value< iter_impl >

友元
iter_impl	operator+ (difference_type i, const iter_impl &it)
	addition of distance and iterator

详细描述

template<typename BasicJsonType>
class detail::iter_impl< BasicJsonType >

a template for a bidirectional iterator for the basic_json class This class implements a both iterators (iterator and const_iterator) for the basic_json class.

注解

An iterator is called initialized when a pointer to a JSON value has been set (e.g., by a constructor or a copy assignment). If the iterator is default-constructed, it is uninitialized and most methods are undefined. The library uses assertions to detect calls on uninitialized iterators.** @requirement The class satisfies the following concept requirements:

BidirectionalIterator: The iterator that can be moved can be moved in both directions (i.e. incremented and decremented).

自从: version 1.0.0, simplified in version 2.0.9, change to bidirectional iterators in version 3.0.0 (see https://github.com/nlohmann/json/issues/593)

Public 类型

Public 成员函数

Public 属性

Private 类型

Private 属性

友元

详细描述

成员类型定义说明

◆ array_t

◆ difference_type

◆ iterator_category

◆ object_t

◆ other_iter_impl

◆ pointer

◆ reference

◆ value_type

构造及析构函数说明

◆ iter_impl() [1/5]

◆ ~iter_impl()

◆ iter_impl() [2/5]

◆ iter_impl() [3/5]

◆ iter_impl() [4/5]

◆ iter_impl() [5/5]

成员函数说明

◆ key()

◆ operator!=()

◆ operator*()

◆ operator+()

◆ operator++() [1/2]

◆ operator++() [2/2]

◆ operator+=()

◆ operator-() [1/2]

◆ operator-() [2/2]

◆ operator--() [1/2]

◆ operator--() [2/2]

◆ operator-=()

◆ operator->()

◆ operator<()

◆ operator<=()

◆ operator=() [1/3]

◆ operator=() [2/3]

◆ operator=() [3/3]

◆ operator==()

◆ operator>()

◆ operator>=()

◆ operator[]()

◆ set_end()

◆ switch()

◆ value()

友元及相关函数文档

◆ operator+

类成员变量说明

◆ __pad0__

◆ __pad1__

◆ BasicJsonType

◆ iteration_proxy< iter_impl >

◆ iteration_proxy_value< iter_impl >

◆ m_it

◆ other_iter_impl

◆ pad0

◆ pad1