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| using | iterator_category = std::bidirectional_iterator_tag |
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using | value_type = typename BasicJsonType::value_type |
| | the type of the values when the iterator is dereferenced
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using | difference_type = typename BasicJsonType::difference_type |
| | a type to represent differences between iterators
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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)
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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)
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template<typename BasicJsonType>
class nlohmann::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.
- 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.**
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).
- Since
- 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)
template<typename BasicJsonType>
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.
