nlohmann::detail::iteration_proxy_value< IteratorType > Class Template Reference

#include <json.hpp>

Public Types
using	difference_type = std::ptrdiff_t
using	value_type = iteration_proxy_value
using	pointer = value_type *
using	reference = value_type &
using	iterator_category = std::input_iterator_tag
using	string_type = typename std::remove_cv< typename std::remove_reference< decltype(std::declval< IteratorType >().key()) >::type >::type

Public Member Functions
	iteration_proxy_value (IteratorType it) noexcept
iteration_proxy_value &	operator* ()
	dereference operator (needed for range-based for) More...
iteration_proxy_value &	operator++ ()
	increment operator (needed for range-based for) More...
bool	operator== (const iteration_proxy_value &o) const
	equality operator (needed for InputIterator) More...
bool	operator!= (const iteration_proxy_value &o) const
	inequality operator (needed for range-based for) More...
const string_type &	key () const
	return key of the iterator More...
IteratorType::reference	value () const
	return value of the iterator More...

Private Attributes
IteratorType	anchor
	the iterator More...
std::size_t	array_index = 0
	an index for arrays (used to create key names) More...
std::size_t	array_index_last = 0
	last stringified array index More...
string_type	array_index_str = "0"
	a string representation of the array index More...
const string_type	empty_str = ""
	an empty string (to return a reference for primitive values) More...

Detailed Description

template<typename IteratorType>
class nlohmann::detail::iteration_proxy_value< IteratorType >

Definition at line 3297 of file json.hpp.

Member Typedef Documentation

template<typename IteratorType>

using nlohmann::detail::iteration_proxy_value< IteratorType >::difference_type = std::ptrdiff_t

Definition at line 3300 of file json.hpp.

template<typename IteratorType>

using nlohmann::detail::iteration_proxy_value< IteratorType >::iterator_category = std::input_iterator_tag

Definition at line 3304 of file json.hpp.

template<typename IteratorType>

using nlohmann::detail::iteration_proxy_value< IteratorType >::pointer = value_type *

Definition at line 3302 of file json.hpp.

template<typename IteratorType>

using nlohmann::detail::iteration_proxy_value< IteratorType >::reference = value_type &

Definition at line 3303 of file json.hpp.

template<typename IteratorType>

using nlohmann::detail::iteration_proxy_value< IteratorType >::string_type = typename std::remove_cv< typename std::remove_reference<decltype( std::declval<IteratorType>().key() ) >::type >::type

Definition at line 3305 of file json.hpp.

template<typename IteratorType>

using nlohmann::detail::iteration_proxy_value< IteratorType >::value_type = iteration_proxy_value

Definition at line 3301 of file json.hpp.

Constructor & Destructor Documentation

template<typename IteratorType>

nlohmann::detail::iteration_proxy_value< IteratorType >::iteration_proxy_value ( IteratorType  it )

inlineexplicitnoexcept

Definition at line 3320 of file json.hpp.

: anchor(it) {}

Member Function Documentation

template<typename IteratorType>

const string_type& nlohmann::detail::iteration_proxy_value< IteratorType >::key ( ) const

inline

return key of the iterator

Definition at line 3350 of file json.hpp.

    {
        assert(anchor.m_object != nullptr);

        switch (anchor.m_object->type())
        {
            // use integer array index as key
            case value_t::array:
            {
                if (array_index != array_index_last)
                {
                    int_to_string( array_index_str, array_index );
                    array_index_last = array_index;
                }
                return array_index_str;
            }

            // use key from the object
            case value_t::object:
                return anchor.key();

            // use an empty key for all primitive types
            default:
                return empty_str;
        }
    }

template<typename IteratorType>

bool nlohmann::detail::iteration_proxy_value< IteratorType >::operator!= ( const iteration_proxy_value< IteratorType > &  o ) const

inline

inequality operator (needed for range-based for)

Definition at line 3344 of file json.hpp.

    {
        return anchor != o.anchor;
    }

template<typename IteratorType>

iteration_proxy_value& nlohmann::detail::iteration_proxy_value< IteratorType >::operator* ( )

inline

dereference operator (needed for range-based for)

Definition at line 3323 of file json.hpp.

    {
        return *this;
    }

template<typename IteratorType>

iteration_proxy_value& nlohmann::detail::iteration_proxy_value< IteratorType >::operator++ ( )

inline

increment operator (needed for range-based for)

Definition at line 3329 of file json.hpp.

    {
        ++anchor;
        ++array_index;

        return *this;
    }

template<typename IteratorType>

bool nlohmann::detail::iteration_proxy_value< IteratorType >::operator== ( const iteration_proxy_value< IteratorType > &  o ) const

inline

equality operator (needed for InputIterator)

Definition at line 3338 of file json.hpp.

    {
        return anchor == o.anchor;
    }

template<typename IteratorType>

IteratorType::reference nlohmann::detail::iteration_proxy_value< IteratorType >::value ( ) const

inline

return value of the iterator

Definition at line 3378 of file json.hpp.

    {
        return anchor.value();
    }

Member Data Documentation

template<typename IteratorType>

IteratorType nlohmann::detail::iteration_proxy_value< IteratorType >::anchor

private

the iterator

Definition at line 3309 of file json.hpp.

template<typename IteratorType>

std::size_t nlohmann::detail::iteration_proxy_value< IteratorType >::array_index = 0

private

an index for arrays (used to create key names)

Definition at line 3311 of file json.hpp.

template<typename IteratorType>

std::size_t nlohmann::detail::iteration_proxy_value< IteratorType >::array_index_last = 0

mutableprivate

last stringified array index

Definition at line 3313 of file json.hpp.

template<typename IteratorType>

string_type nlohmann::detail::iteration_proxy_value< IteratorType >::array_index_str = "0"

mutableprivate

a string representation of the array index

Definition at line 3315 of file json.hpp.

template<typename IteratorType>

const string_type nlohmann::detail::iteration_proxy_value< IteratorType >::empty_str = ""

private

an empty string (to return a reference for primitive values)

Definition at line 3317 of file json.hpp.

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The documentation for this class was generated from the following file:

• json.hpp