nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal Class Reference

helper class for iteration More...

Public Types
using	difference_type = std::ptrdiff_t
using	value_type = iteration_proxy_internal
using	pointer = iteration_proxy_internal *
using	reference = iteration_proxy_internal &
using	iterator_category = std::input_iterator_tag

Public Member Functions
	iteration_proxy_internal (IteratorType it) noexcept
iteration_proxy_internal &	operator* ()
	dereference operator (needed for range-based for) More...
iteration_proxy_internal &	operator++ ()
	increment operator (needed for range-based for) More...
bool	operator== (const iteration_proxy_internal &o) const noexcept
	equality operator (needed for InputIterator) More...
bool	operator!= (const iteration_proxy_internal &o) const noexcept
	inequality operator (needed for range-based for) More...
const std::string &	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...
std::string	array_index_str = "0"
	a string representation of the array index More...
const std::string	empty_str = ""
	an empty string (to return a reference for primitive values) More...

Detailed Description

template<typename IteratorType>
class nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal

helper class for iteration

Definition at line 1610 of file json.hpp.

Member Typedef Documentation

template<typename IteratorType>

using nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::difference_type = std::ptrdiff_t

Definition at line 1613 of file json.hpp.

template<typename IteratorType>

using nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::iterator_category = std::input_iterator_tag

Definition at line 1617 of file json.hpp.

template<typename IteratorType>

using nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::pointer = iteration_proxy_internal*

Definition at line 1615 of file json.hpp.

template<typename IteratorType>

using nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::reference = iteration_proxy_internal&

Definition at line 1616 of file json.hpp.

template<typename IteratorType>

using nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::value_type = iteration_proxy_internal

Definition at line 1614 of file json.hpp.

Constructor & Destructor Documentation

template<typename IteratorType>

nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::iteration_proxy_internal ( IteratorType  it )

inlineexplicitnoexcept

Definition at line 1632 of file json.hpp.

: anchor(it) {}

Member Function Documentation

template<typename IteratorType>

const std::string& nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::key ( ) const

inline

return key of the iterator

Definition at line 1662 of file json.hpp.

References nlohmann::detail::array, and nlohmann::detail::object.

        {
            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)
                    {
                        array_index_str = std::to_string(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< IteratorType >::iteration_proxy_internal::operator!= ( const iteration_proxy_internal &  o ) const

inlinenoexcept

inequality operator (needed for range-based for)

Definition at line 1656 of file json.hpp.

        {
            return anchor != o.anchor;
        }

template<typename IteratorType>

iteration_proxy_internal& nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::operator* ( )

inline

dereference operator (needed for range-based for)

Definition at line 1635 of file json.hpp.

        {
            return *this;
        }

template<typename IteratorType>

iteration_proxy_internal& nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::operator++ ( )

inline

increment operator (needed for range-based for)

Definition at line 1641 of file json.hpp.

        {
            ++anchor;
            ++array_index;

            return *this;
        }

template<typename IteratorType>

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

inlinenoexcept

equality operator (needed for InputIterator)

Definition at line 1650 of file json.hpp.

        {
            return anchor == o.anchor;
        }

template<typename IteratorType>

IteratorType::reference nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::value ( ) const

inline

return value of the iterator

Definition at line 1690 of file json.hpp.

        {
            return anchor.value();
        }

Member Data Documentation

template<typename IteratorType>

IteratorType nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::anchor

private

the iterator

Definition at line 1621 of file json.hpp.

template<typename IteratorType>

std::size_t nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::array_index = 0

private

an index for arrays (used to create key names)

Definition at line 1623 of file json.hpp.

template<typename IteratorType>

std::size_t nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::array_index_last = 0

mutableprivate

last stringified array index

Definition at line 1625 of file json.hpp.

template<typename IteratorType>

std::string nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::array_index_str = "0"

mutableprivate

a string representation of the array index

Definition at line 1627 of file json.hpp.

template<typename IteratorType>

const std::string nlohmann::detail::iteration_proxy< IteratorType >::iteration_proxy_internal::empty_str = ""

private

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

Definition at line 1629 of file json.hpp.

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

• src/3party/JSON/json.hpp