nlohmann::basic_json::iter_impl< U > Class Template Reference

a template for a random access iterator for the basic_json class More...

#include <json.hpp>

Public Types
using	difference_type = typename basic_json::difference_type
	a type to represent differences between iterators More...
using	iterator_category = std::bidirectional_iterator_tag
	the category of the iterator More...
using	pointer = typename std::conditional< std::is_const< U >::value, typename basic_json::const_pointer, typename basic_json::pointer >::type
	defines a pointer to the type iterated over (value_type) More...
using	reference = typename std::conditional< std::is_const< U >::value, typename basic_json::const_reference, typename basic_json::reference >::type
	defines a reference to the type iterated over (value_type) More...
using	value_type = typename basic_json::value_type
	the type of the values when the iterator is dereferenced More...

Public Member Functions
	iter_impl ()=default
	default constructor More...
	iter_impl (pointer object) noexcept
	constructor for a given JSON instance More...
	iter_impl (const iter_impl &other) noexcept
	copy constructor More...
object_t::key_type	key () const
	return the key of an object iterator More...
	operator const_iterator () const
bool	operator!= (const iter_impl &other) const
	comparison: not equal More...
reference	operator* () const
	return a reference to the value pointed to by the iterator More...
iter_impl	operator+ (difference_type i)
	add to iterator More...
iter_impl	operator++ (int)
	post-increment (it++) More...
iter_impl &	operator++ ()
	pre-increment (++it) More...
iter_impl &	operator+= (difference_type i)
	add to iterator More...
iter_impl	operator- (difference_type i)
	subtract from iterator More...
difference_type	operator- (const iter_impl &other) const
	return difference More...
iter_impl	operator-- (int)
	post-decrement (it–) More...
iter_impl &	operator-- ()
	pre-decrement (–it) More...
iter_impl &	operator-= (difference_type i)
	subtract from iterator More...
pointer	operator-> () const
	dereference the iterator More...
bool	operator< (const iter_impl &other) const
	comparison: smaller More...
bool	operator<= (const iter_impl &other) const
	comparison: less than or equal More...
iter_impl &	operator= (iter_impl other) noexcept(std::is_nothrow_move_constructible< pointer >::value and std::is_nothrow_move_assignable< pointer >::value and std::is_nothrow_move_constructible< internal_iterator >::value and std::is_nothrow_move_assignable< internal_iterator >::value)
	copy assignment More...
bool	operator== (const iter_impl &other) const
	comparison: equal More...
bool	operator> (const iter_impl &other) const
	comparison: greater than More...
bool	operator>= (const iter_impl &other) const
	comparison: greater than or equal More...
reference	operator[] (difference_type n) const
	access to successor More...
reference	value () const
	return the value of an iterator More...

Friends
class	basic_json
	allow basic_json to access private members More...

Detailed Description

template<template< typename U, typename V, typename... Args > class ObjectType = std::map, template< typename U, typename... Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator>
template<typename U>
class nlohmann::basic_json::iter_impl< U >

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

Note

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.

Requirements

The class satisfies the following concept requirements:

• RandomAccessIterator: The iterator that can be moved to point (forward and backward) to any element in constant time.

Since

version 1.0.0, simplified in version 2.0.9

Definition at line 231 of file json.hpp.