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a template for a bidirectional iterator for the basic_json class More...
#include <json.h>
Public Types | |
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 = typename std::conditional< std::is_const< BasicJsonType >::value, typename BasicJsonType::const_pointer, typename BasicJsonType::pointer >::type |
defines a pointer to the type iterated over (value_type) | |
using | reference = typename std::conditional< std::is_const< BasicJsonType >::value, typename BasicJsonType::const_reference, typename BasicJsonType::reference >::type |
defines a reference to the type iterated over (value_type) | |
Public Member Functions | |
iter_impl ()=default | |
default constructor | |
iter_impl (pointer object) noexcept | |
constructor for a given JSON instance | |
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 | |
reference | operator* () const |
return a reference to the value pointed to by the iterator | |
pointer | operator-> () const |
dereference the iterator | |
iter_impl const | operator++ (int) |
post-increment (it++) | |
iter_impl & | operator++ () |
pre-increment (++it) | |
iter_impl const | operator-- (int) |
post-decrement (it–) | |
iter_impl & | operator-- () |
pre-decrement (–it) | |
bool | operator== (const iter_impl &other) const |
comparison: equal | |
bool | operator!= (const iter_impl &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 | |
object_t::key_type | key () const |
return the key of an object iterator | |
reference | value () const |
return the value of an iterator | |
Friends | |
iter_impl | operator+ (difference_type i, const iter_impl &it) |
addition of distance and iterator | |
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.
@requirement The class satisfies the following concept requirements:
using nlohmann::detail::iter_impl< BasicJsonType >::difference_type = typename BasicJsonType::difference_type |
using nlohmann::detail::iter_impl< BasicJsonType >::iterator_category = std::bidirectional_iterator_tag |
The std::iterator class template (used as a base class to provide typedefs) is deprecated in C++17. The C++ Standard has never required user-defined iterators to derive from std::iterator. A user-defined iterator should provide publicly accessible typedefs named iterator_category, value_type, difference_type, pointer, and reference. Note that value_type is required to be non-const, even for constant iterators.
using nlohmann::detail::iter_impl< BasicJsonType >::pointer = typename std::conditional<std::is_const<BasicJsonType>::value, typename BasicJsonType::const_pointer, typename BasicJsonType::pointer>::type |
using nlohmann::detail::iter_impl< BasicJsonType >::reference = typename std::conditional<std::is_const<BasicJsonType>::value, typename BasicJsonType::const_reference, typename BasicJsonType::reference>::type |
using nlohmann::detail::iter_impl< BasicJsonType >::value_type = typename BasicJsonType::value_type |
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default constructor
allow basic_json to access private members
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converting constructor
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