nlohmann::detail Namespace Reference

detail namespace with internal helper functions More...

Namespaces
namespace	container_input_adapter_factory_impl
namespace	dtoa_impl
	implements the Grisu2 algorithm for binary to decimal floating-point conversion.
namespace	utility_internal

Classes
class	binary_reader
	deserialization of CBOR, MessagePack, and UBJSON values More...
class	binary_writer
	serialization to CBOR and MessagePack values More...
struct	conjunction
struct	conjunction< B1 >
struct	conjunction< B1, Bn... >
struct	detector
struct	detector< Default, void_t< Op< Args... > >, Op, Args... >
class	exception
	general exception of the basic_json class More...
struct	external_constructor
struct	external_constructor< value_t::array >
struct	external_constructor< value_t::binary >
struct	external_constructor< value_t::boolean >
struct	external_constructor< value_t::number_float >
struct	external_constructor< value_t::number_integer >
struct	external_constructor< value_t::number_unsigned >
struct	external_constructor< value_t::object >
struct	external_constructor< value_t::string >
class	file_input_adapter
struct	from_json_fn
struct	has_from_json
struct	has_from_json< BasicJsonType, T, enable_if_t< !is_basic_json< T >::value > >
struct	has_non_default_from_json
struct	has_non_default_from_json< BasicJsonType, T, enable_if_t< !is_basic_json< T >::value > >
struct	has_to_json
struct	has_to_json< BasicJsonType, T, enable_if_t< !is_basic_json< T >::value > >
struct	identity_tag
class	input_stream_adapter
struct	integer_sequence
struct	internal_iterator
	an iterator value More...
class	invalid_iterator
	exception indicating errors with iterators More...
struct	is_basic_json
struct	is_basic_json< NLOHMANN_BASIC_JSON_TPL >
struct	is_compatible_array_type
struct	is_compatible_array_type_impl
struct	is_compatible_array_type_impl< BasicJsonType, CompatibleArrayType, enable_if_t< is_detected< value_type_t, CompatibleArrayType >::value &&is_detected< iterator_t, CompatibleArrayType >::value &&!is_iterator_traits< iterator_traits< CompatibleArrayType > >::value > >
struct	is_compatible_integer_type
struct	is_compatible_integer_type_impl
struct	is_compatible_integer_type_impl< RealIntegerType, CompatibleNumberIntegerType, enable_if_t< std::is_integral< RealIntegerType >::value &&std::is_integral< CompatibleNumberIntegerType >::value &&!std::is_same< bool, CompatibleNumberIntegerType >::value > >
struct	is_compatible_object_type
struct	is_compatible_object_type_impl
struct	is_compatible_object_type_impl< BasicJsonType, CompatibleObjectType, enable_if_t< is_detected< mapped_type_t, CompatibleObjectType >::value &&is_detected< key_type_t, CompatibleObjectType >::value > >
struct	is_compatible_string_type
struct	is_compatible_string_type_impl
struct	is_compatible_string_type_impl< BasicJsonType, CompatibleStringType, enable_if_t< is_detected_exact< typename BasicJsonType::string_t::value_type, value_type_t, CompatibleStringType >::value > >
struct	is_compatible_type
struct	is_compatible_type_impl
struct	is_compatible_type_impl< BasicJsonType, CompatibleType, enable_if_t< is_complete_type< CompatibleType >::value > >
struct	is_complete_type
struct	is_complete_type< T, decltype(void(sizeof(T)))>
struct	is_constructible
struct	is_constructible< const std::pair< T1, T2 > >
struct	is_constructible< const std::tuple< Ts... > >
struct	is_constructible< std::pair< T1, T2 > >
struct	is_constructible< std::tuple< Ts... > >
struct	is_constructible_array_type
struct	is_constructible_array_type_impl
struct	is_constructible_array_type_impl< BasicJsonType, ConstructibleArrayType, enable_if_t< !std::is_same< ConstructibleArrayType, typename BasicJsonType::value_type >::value &&is_default_constructible< ConstructibleArrayType >::value &&(std::is_move_assignable< ConstructibleArrayType >::value||std::is_copy_assignable< ConstructibleArrayType >::value) &&is_detected< value_type_t, ConstructibleArrayType >::value &&is_detected< iterator_t, ConstructibleArrayType >::value &&is_complete_type< detected_t< value_type_t, ConstructibleArrayType > >::value > >
struct	is_constructible_array_type_impl< BasicJsonType, ConstructibleArrayType, enable_if_t< std::is_same< ConstructibleArrayType, typename BasicJsonType::value_type >::value > >
struct	is_constructible_object_type
struct	is_constructible_object_type_impl
struct	is_constructible_object_type_impl< BasicJsonType, ConstructibleObjectType, enable_if_t< is_detected< mapped_type_t, ConstructibleObjectType >::value &&is_detected< key_type_t, ConstructibleObjectType >::value > >
struct	is_constructible_string_type
struct	is_constructible_string_type_impl
struct	is_constructible_string_type_impl< BasicJsonType, ConstructibleStringType, enable_if_t< is_detected_exact< typename BasicJsonType::string_t::value_type, value_type_t, ConstructibleStringType >::value > >
struct	is_constructible_tuple
struct	is_constructible_tuple< T1, std::tuple< Args... > >
struct	is_default_constructible
struct	is_default_constructible< const std::pair< T1, T2 > >
struct	is_default_constructible< const std::tuple< Ts... > >
struct	is_default_constructible< std::pair< T1, T2 > >
struct	is_default_constructible< std::tuple< Ts... > >
struct	is_detected_lazy
struct	is_getable
struct	is_iterator_of_multibyte
struct	is_iterator_traits
struct	is_iterator_traits< iterator_traits< T > >
struct	is_json_ref
struct	is_json_ref< json_ref< T > >
struct	is_ordered_map
struct	is_sax
struct	is_sax_static_asserts
class	iter_impl
	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. More...
class	iteration_proxy
	proxy class for the items() function More...
class	iteration_proxy_value
class	iterator_input_adapter
struct	iterator_input_adapter_factory
struct	iterator_input_adapter_factory< IteratorType, enable_if_t< is_iterator_of_multibyte< IteratorType >::value > >
struct	iterator_traits
struct	iterator_traits< T *, enable_if_t< std::is_object< T >::value > >
struct	iterator_traits< T, enable_if_t< !std::is_pointer< T >::value > >
struct	iterator_types
struct	iterator_types< It, void_t< typename It::difference_type, typename It::value_type, typename It::pointer, typename It::reference, typename It::iterator_category > >
class	json_ref
class	json_reverse_iterator
	a template for a reverse iterator class More...
class	json_sax_acceptor
class	json_sax_dom_callback_parser
class	json_sax_dom_parser
	SAX implementation to create a JSON value from SAX events. More...
class	lexer
	lexical analysis More...
class	lexer_base
struct	make_void
struct	negation
struct	nonesuch
class	other_error
	exception indicating other library errors More...
class	out_of_range
	exception indicating access out of the defined range More...
class	output_adapter
struct	output_adapter_protocol
	abstract output adapter interface More...
class	output_stream_adapter
	output adapter for output streams More...
class	output_string_adapter
	output adapter for basic_string More...
class	output_vector_adapter
	output adapter for byte vectors More...
class	parse_error
	exception indicating a parse error More...
class	parser
	syntax analysis More...
struct	position_t
	struct to capture the start position of the current token More...
class	primitive_iterator_t
struct	priority_tag
struct	priority_tag< 0 >
class	serializer
class	span_input_adapter
struct	static_const
struct	to_json_fn
class	type_error
	exception indicating executing a member function with a wrong type More...
class	wide_string_input_adapter
struct	wide_string_input_helper
struct	wide_string_input_helper< BaseInputAdapter, 2 >
struct	wide_string_input_helper< BaseInputAdapter, 4 >

Typedefs
template<typename T >
using	uncvref_t = typename std::remove_cv<typename std::remove_reference<T>::type>::type
template<bool B, typename T = void>
using	enable_if_t = typename std::enable_if<B, T>::type
template<size_t... Ints>
using	index_sequence = integer_sequence<size_t, Ints...>
template<typename T , T N>
using	make_integer_sequence = typename utility_internal::Gen<T, N>::type
template<size_t N>
using	make_index_sequence = make_integer_sequence<size_t, N>
template<typename... Ts>
using	index_sequence_for = make_index_sequence<sizeof...(Ts)>
template<typename ... Ts>
using	void_t = typename make_void<Ts...>::type
template<template< class... > class Op, class... Args>
using	is_detected = typename detector<nonesuch, void, Op, Args...>::value_t
template<template< class... > class Op, class... Args>
using	detected_t = typename detector<nonesuch, void, Op, Args...>::type
template<class Default , template< class... > class Op, class... Args>
using	detected_or = detector<Default, void, Op, Args...>
template<class Default , template< class... > class Op, class... Args>
using	detected_or_t = typename detected_or<Default, Op, Args...>::type
template<class Expected , template< class... > class Op, class... Args>
using	is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>
template<class To , template< class... > class Op, class... Args>
using	is_detected_convertible
template<typename T >
using	mapped_type_t = typename T::mapped_type
template<typename T >
using	key_type_t = typename T::key_type
template<typename T >
using	value_type_t = typename T::value_type
template<typename T >
using	difference_type_t = typename T::difference_type
template<typename T >
using	pointer_t = typename T::pointer
template<typename T >
using	reference_t = typename T::reference
template<typename T >
using	iterator_category_t = typename T::iterator_category
template<typename T >
using	iterator_t = typename T::iterator
template<typename T , typename... Args>
using	to_json_function = decltype(T::to_json(std::declval<Args>()...))
template<typename T , typename... Args>
using	from_json_function = decltype(T::from_json(std::declval<Args>()...))
template<typename T , typename U >
using	get_template_function = decltype(std::declval<T>().template get<U>())
using	contiguous_bytes_input_adapter = decltype(input_adapter(std::declval<const char*>(), std::declval<const char*>()))
template<typename T >
using	null_function_t = decltype(std::declval<T&>().null())
template<typename T >
using	boolean_function_t
template<typename T , typename Integer >
using	number_integer_function_t
template<typename T , typename Unsigned >
using	number_unsigned_function_t
template<typename T , typename Float , typename String >
using	number_float_function_t
template<typename T , typename String >
using	string_function_t
template<typename T , typename Binary >
using	binary_function_t
template<typename T >
using	start_object_function_t
template<typename T , typename String >
using	key_function_t
template<typename T >
using	end_object_function_t = decltype(std::declval<T&>().end_object())
template<typename T >
using	start_array_function_t
template<typename T >
using	end_array_function_t = decltype(std::declval<T&>().end_array())
template<typename T , typename Exception >
using	parse_error_function_t
template<typename BasicJsonType >
using	parser_callback_t
template<typename CharType >
using	output_adapter_t = std::shared_ptr<output_adapter_protocol<CharType>>
	a type to simplify interfaces

Enumerations
enum class	value_t : std::uint8_t {   null , object , array , string ,   boolean , number_integer , number_unsigned , number_float ,   binary , discarded }
	the JSON type enumeration More...
enum class	input_format_t {   json , cbor , msgpack , ubjson ,   bson }
	the supported input formats More...
enum class	cbor_tag_handler_t { error , ignore , store }
	how to treat CBOR tags More...
enum class	parse_event_t : std::uint8_t {   object_start , object_end , array_start , array_end ,   key , value }
enum class	error_handler_t { strict , replace , ignore }
	how to treat decoding errors More...

Functions
bool	operator< (const value_t lhs, const value_t rhs) noexcept
	comparison operator for JSON types
void	replace_substring (std::string &s, const std::string &f, const std::string &t)
	replace all occurrences of a substring by another string
std::string	escape (std::string s)
	string escaping as described in RFC 6901 (Sect. 4)
static void	unescape (std::string &s)
	string unescaping as described in RFC 6901 (Sect. 4)
template<typename T , typename U , enable_if_t< !std::is_same< T, U >::value, int > = 0>
T	conditional_static_cast (U value)
template<typename BasicJsonType >
void	from_json (const BasicJsonType &j, typename std::nullptr_t &n)
template<typename BasicJsonType , typename ArithmeticType , enable_if_t< std::is_arithmetic< ArithmeticType >::value &&!std::is_same< ArithmeticType, typename BasicJsonType::boolean_t >::value, int > = 0>
void	get_arithmetic_value (const BasicJsonType &j, ArithmeticType &val)
template<typename BasicJsonType >
void	from_json (const BasicJsonType &j, typename BasicJsonType::boolean_t &b)
template<typename BasicJsonType >
void	from_json (const BasicJsonType &j, typename BasicJsonType::string_t &s)
template<typename BasicJsonType , typename ConstructibleStringType , enable_if_t< is_constructible_string_type< BasicJsonType, ConstructibleStringType >::value &&!std::is_same< typename BasicJsonType::string_t, ConstructibleStringType >::value, int > = 0>
void	from_json (const BasicJsonType &j, ConstructibleStringType &s)
template<typename BasicJsonType >
void	from_json (const BasicJsonType &j, typename BasicJsonType::number_float_t &val)
template<typename BasicJsonType >
void	from_json (const BasicJsonType &j, typename BasicJsonType::number_unsigned_t &val)
template<typename BasicJsonType >
void	from_json (const BasicJsonType &j, typename BasicJsonType::number_integer_t &val)
template<typename BasicJsonType , typename EnumType , enable_if_t< std::is_enum< EnumType >::value, int > = 0>
void	from_json (const BasicJsonType &j, EnumType &e)
template<typename BasicJsonType , typename T , typename Allocator , enable_if_t< is_getable< BasicJsonType, T >::value, int > = 0>
void	from_json (const BasicJsonType &j, std::forward_list< T, Allocator > &l)
template<typename BasicJsonType , typename T , enable_if_t< is_getable< BasicJsonType, T >::value, int > = 0>
void	from_json (const BasicJsonType &j, std::valarray< T > &l)
template<typename BasicJsonType , typename T , std::size_t N>
auto	from_json (const BasicJsonType &j, T(&arr)[N]) -> decltype(j.template get< T >(), void())
template<typename BasicJsonType >
void	from_json_array_impl (const BasicJsonType &j, typename BasicJsonType::array_t &arr, priority_tag< 3 >)
template<typename BasicJsonType , typename T , std::size_t N>
auto	from_json_array_impl (const BasicJsonType &j, std::array< T, N > &arr, priority_tag< 2 >) -> decltype(j.template get< T >(), void())
template<typename BasicJsonType , typename ConstructibleArrayType , enable_if_t< std::is_assignable< ConstructibleArrayType &, ConstructibleArrayType >::value, int > = 0>
auto	from_json_array_impl (const BasicJsonType &j, ConstructibleArrayType &arr, priority_tag< 1 >) -> decltype(arr.reserve(std::declval< typename ConstructibleArrayType::size_type >()), j.template get< typename ConstructibleArrayType::value_type >(), void())
template<typename BasicJsonType , typename ConstructibleArrayType , enable_if_t< std::is_assignable< ConstructibleArrayType &, ConstructibleArrayType >::value, int > = 0>
void	from_json_array_impl (const BasicJsonType &j, ConstructibleArrayType &arr, priority_tag< 0 >)
template<typename BasicJsonType , typename ConstructibleArrayType , enable_if_t< is_constructible_array_type< BasicJsonType, ConstructibleArrayType >::value &&!is_constructible_object_type< BasicJsonType, ConstructibleArrayType >::value &&!is_constructible_string_type< BasicJsonType, ConstructibleArrayType >::value &&!std::is_same< ConstructibleArrayType, typename BasicJsonType::binary_t >::value &&!is_basic_json< ConstructibleArrayType >::value, int > = 0>
auto	from_json (const BasicJsonType &j, ConstructibleArrayType &arr) -> decltype(from_json_array_impl(j, arr, priority_tag< 3 > {}), j.template get< typename ConstructibleArrayType::value_type >(), void())
template<typename BasicJsonType , typename T , std::size_t... Idx>
std::array< T, sizeof...(Idx)>	from_json_inplace_array_impl (BasicJsonType &&j, identity_tag< std::array< T, sizeof...(Idx)> >, index_sequence< Idx... >)
template<typename BasicJsonType , typename T , std::size_t N>
auto	from_json (BasicJsonType &&j, identity_tag< std::array< T, N > > tag) -> decltype(from_json_inplace_array_impl(std::forward< BasicJsonType >(j), tag, make_index_sequence< N > {}))
template<typename BasicJsonType >
void	from_json (const BasicJsonType &j, typename BasicJsonType::binary_t &bin)
template<typename BasicJsonType , typename ConstructibleObjectType , enable_if_t< is_constructible_object_type< BasicJsonType, ConstructibleObjectType >::value, int > = 0>
void	from_json (const BasicJsonType &j, ConstructibleObjectType &obj)
template<typename BasicJsonType , typename ArithmeticType , enable_if_t< std::is_arithmetic< ArithmeticType >::value &&!std::is_same< ArithmeticType, typename BasicJsonType::number_unsigned_t >::value &&!std::is_same< ArithmeticType, typename BasicJsonType::number_integer_t >::value &&!std::is_same< ArithmeticType, typename BasicJsonType::number_float_t >::value &&!std::is_same< ArithmeticType, typename BasicJsonType::boolean_t >::value, int > = 0>
void	from_json (const BasicJsonType &j, ArithmeticType &val)
template<typename BasicJsonType , typename... Args, std::size_t... Idx>
std::tuple< Args... >	from_json_tuple_impl_base (BasicJsonType &&j, index_sequence< Idx... >)
template<typename BasicJsonType , class A1 , class A2 >
std::pair< A1, A2 >	from_json_tuple_impl (BasicJsonType &&j, identity_tag< std::pair< A1, A2 > >, priority_tag< 0 >)
template<typename BasicJsonType , typename A1 , typename A2 >
void	from_json_tuple_impl (BasicJsonType &&j, std::pair< A1, A2 > &p, priority_tag< 1 >)
template<typename BasicJsonType , typename... Args>
std::tuple< Args... >	from_json_tuple_impl (BasicJsonType &&j, identity_tag< std::tuple< Args... > >, priority_tag< 2 >)
template<typename BasicJsonType , typename... Args>
void	from_json_tuple_impl (BasicJsonType &&j, std::tuple< Args... > &t, priority_tag< 3 >)
template<typename BasicJsonType , typename TupleRelated >
auto	from_json (BasicJsonType &&j, TupleRelated &&t) -> decltype(from_json_tuple_impl(std::forward< BasicJsonType >(j), std::forward< TupleRelated >(t), priority_tag< 3 > {}))
template<typename BasicJsonType , typename Key , typename Value , typename Compare , typename Allocator , typename = enable_if_t < !std::is_constructible < typename BasicJsonType::string_t, Key >::value >>
void	from_json (const BasicJsonType &j, std::map< Key, Value, Compare, Allocator > &m)
template<typename BasicJsonType , typename Key , typename Value , typename Hash , typename KeyEqual , typename Allocator , typename = enable_if_t < !std::is_constructible < typename BasicJsonType::string_t, Key >::value >>
void	from_json (const BasicJsonType &j, std::unordered_map< Key, Value, Hash, KeyEqual, Allocator > &m)
template<typename string_type >
void	int_to_string (string_type &target, std::size_t value)
template<std::size_t N, typename IteratorType , enable_if_t< N==0, int > = 0>
auto	get (const nlohmann::detail::iteration_proxy_value< IteratorType > &i) -> decltype(i.key())
template<typename BasicJsonType , typename T , enable_if_t< std::is_same< T, typename BasicJsonType::boolean_t >::value, int > = 0>
void	to_json (BasicJsonType &j, T b) noexcept
template<typename BasicJsonType , typename CompatibleString , enable_if_t< std::is_constructible< typename BasicJsonType::string_t, CompatibleString >::value, int > = 0>
void	to_json (BasicJsonType &j, const CompatibleString &s)
template<typename BasicJsonType >
void	to_json (BasicJsonType &j, typename BasicJsonType::string_t &&s)
template<typename BasicJsonType , typename FloatType , enable_if_t< std::is_floating_point< FloatType >::value, int > = 0>
void	to_json (BasicJsonType &j, FloatType val) noexcept
template<typename BasicJsonType , typename CompatibleNumberUnsignedType , enable_if_t< is_compatible_integer_type< typename BasicJsonType::number_unsigned_t, CompatibleNumberUnsignedType >::value, int > = 0>
void	to_json (BasicJsonType &j, CompatibleNumberUnsignedType val) noexcept
template<typename BasicJsonType , typename CompatibleNumberIntegerType , enable_if_t< is_compatible_integer_type< typename BasicJsonType::number_integer_t, CompatibleNumberIntegerType >::value, int > = 0>
void	to_json (BasicJsonType &j, CompatibleNumberIntegerType val) noexcept
template<typename BasicJsonType , typename EnumType , enable_if_t< std::is_enum< EnumType >::value, int > = 0>
void	to_json (BasicJsonType &j, EnumType e) noexcept
template<typename BasicJsonType >
void	to_json (BasicJsonType &j, const std::vector< bool > &e)
template<typename BasicJsonType , typename CompatibleArrayType , enable_if_t< is_compatible_array_type< BasicJsonType, CompatibleArrayType >::value &&!is_compatible_object_type< BasicJsonType, CompatibleArrayType >::value &&!is_compatible_string_type< BasicJsonType, CompatibleArrayType >::value &&!std::is_same< typename BasicJsonType::binary_t, CompatibleArrayType >::value &&!is_basic_json< CompatibleArrayType >::value, int > = 0>
void	to_json (BasicJsonType &j, const CompatibleArrayType &arr)
template<typename BasicJsonType >
void	to_json (BasicJsonType &j, const typename BasicJsonType::binary_t &bin)
template<typename BasicJsonType , typename T , enable_if_t< std::is_convertible< T, BasicJsonType >::value, int > = 0>
void	to_json (BasicJsonType &j, const std::valarray< T > &arr)
template<typename BasicJsonType >
void	to_json (BasicJsonType &j, typename BasicJsonType::array_t &&arr)
template<typename BasicJsonType , typename CompatibleObjectType , enable_if_t< is_compatible_object_type< BasicJsonType, CompatibleObjectType >::value &&!is_basic_json< CompatibleObjectType >::value, int > = 0>
void	to_json (BasicJsonType &j, const CompatibleObjectType &obj)
template<typename BasicJsonType >
void	to_json (BasicJsonType &j, typename BasicJsonType::object_t &&obj)
template<typename BasicJsonType , typename T , std::size_t N, enable_if_t< !std::is_constructible< typename BasicJsonType::string_t, const T(&)[N]>::value, int > = 0>
void	to_json (BasicJsonType &j, const T(&arr)[N])
template<typename BasicJsonType , typename T1 , typename T2 , enable_if_t< std::is_constructible< BasicJsonType, T1 >::value &&std::is_constructible< BasicJsonType, T2 >::value, int > = 0>
void	to_json (BasicJsonType &j, const std::pair< T1, T2 > &p)
template<typename BasicJsonType , typename T , enable_if_t< std::is_same< T, iteration_proxy_value< typename BasicJsonType::iterator > >::value, int > = 0>
void	to_json (BasicJsonType &j, const T &b)
template<typename BasicJsonType , typename Tuple , std::size_t... Idx>
void	to_json_tuple_impl (BasicJsonType &j, const Tuple &t, index_sequence< Idx... >)
std::size_t	combine (std::size_t seed, std::size_t h) noexcept
template<typename BasicJsonType >
std::size_t	hash (const BasicJsonType &j)
	hash a JSON value
template<typename IteratorType >
iterator_input_adapter_factory< IteratorType >::adapter_type	input_adapter (IteratorType first, IteratorType last)
template<typename ContainerType >
container_input_adapter_factory_impl::container_input_adapter_factory< ContainerType >::adapter_type	input_adapter (const ContainerType &container)
file_input_adapter	input_adapter (std::FILE *file)
input_stream_adapter	input_adapter (std::istream &stream)
input_stream_adapter	input_adapter (std::istream &&stream)
template<typename CharT , typename std::enable_if< std::is_pointer< CharT >::value &&!std::is_array< CharT >::value &&std::is_integral< typename std::remove_pointer< CharT >::type >::value &&sizeof(typename std::remove_pointer< CharT >::type)==1, int >::type = 0>
contiguous_bytes_input_adapter	input_adapter (CharT b)
template<typename T , std::size_t N>
auto	input_adapter (T(&array)[N]) -> decltype(input_adapter(array, array+N))
static bool	little_endianess (int num=1) noexcept
	determine system byte order
template<typename FloatType >
JSON_HEDLEY_RETURNS_NON_NULL char *	to_chars (char *first, const char *last, FloatType value)
	generates a decimal representation of the floating-point number value in [first, last).

Detailed Description

detail namespace with internal helper functions

This namespace collects functions that should not be exposed, implementations of some basic_json methods, and meta-programming helpers.

Since

version 2.1.0

Typedef Documentation

binary_function_t

template<typename T , typename Binary >

using nlohmann::detail::binary_function_t

Initial value:

 
            decltype(std::declval<T&>().binary(std::declval<Binary&>()))

Definition at line 8201 of file json.hpp.

boolean_function_t

template<typename T >

using nlohmann::detail::boolean_function_t

Initial value:

 
            decltype(std::declval<T&>().boolean(std::declval<bool>()))

Definition at line 8181 of file json.hpp.

contiguous_bytes_input_adapter

using nlohmann::detail::contiguous_bytes_input_adapter = decltype(input_adapter(std::declval<const char*>(), std::declval<const char*>()))

Definition at line 5761 of file json.hpp.

detected_or

template<class Default , template< class... > class Op, class... Args>

using nlohmann::detail::detected_or = detector<Default, void, Op, Args...>

Definition at line 3333 of file json.hpp.

detected_or_t

template<class Default , template< class... > class Op, class... Args>

using nlohmann::detail::detected_or_t = typename detected_or<Default, Op, Args...>::type

Definition at line 3336 of file json.hpp.

detected_t

template<template< class... > class Op, class... Args>

using nlohmann::detail::detected_t = typename detector<nonesuch, void, Op, Args...>::type

Definition at line 3330 of file json.hpp.

difference_type_t

template<typename T >

using nlohmann::detail::difference_type_t = typename T::difference_type

Definition at line 3485 of file json.hpp.

enable_if_t

template<bool B, typename T = void>

using nlohmann::detail::enable_if_t = typename std::enable_if<B, T>::type

Definition at line 3064 of file json.hpp.

end_array_function_t

template<typename T >

using nlohmann::detail::end_array_function_t = decltype(std::declval<T&>().end_array())

Definition at line 8220 of file json.hpp.

end_object_function_t

template<typename T >

using nlohmann::detail::end_object_function_t = decltype(std::declval<T&>().end_object())

Definition at line 8213 of file json.hpp.

from_json_function

template<typename T , typename... Args>

using nlohmann::detail::from_json_function = decltype(T::from_json(std::declval<Args>()...))

Definition at line 3503 of file json.hpp.

get_template_function

template<typename T , typename U >

using nlohmann::detail::get_template_function = decltype(std::declval<T>().template get<U>())

Definition at line 3506 of file json.hpp.

index_sequence

template<size_t... Ints>

using nlohmann::detail::index_sequence = integer_sequence<size_t, Ints...>

Definition at line 3106 of file json.hpp.

index_sequence_for

template<typename... Ts>

using nlohmann::detail::index_sequence_for = make_index_sequence<sizeof...(Ts)>

Definition at line 3168 of file json.hpp.

is_detected

template<template< class... > class Op, class... Args>

using nlohmann::detail::is_detected = typename detector<nonesuch, void, Op, Args...>::value_t

Definition at line 3324 of file json.hpp.

is_detected_convertible

template<class To , template< class... > class Op, class... Args>

using nlohmann::detail::is_detected_convertible

Initial value:

 
            std::is_convertible<detected_t<Op, Args...>, To>

Definition at line 3342 of file json.hpp.

is_detected_exact

template<class Expected , template< class... > class Op, class... Args>

using nlohmann::detail::is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>

Definition at line 3339 of file json.hpp.

iterator_category_t

template<typename T >

using nlohmann::detail::iterator_category_t = typename T::iterator_category

Definition at line 3494 of file json.hpp.

iterator_t

template<typename T >

using nlohmann::detail::iterator_t = typename T::iterator

Definition at line 3497 of file json.hpp.

key_function_t

template<typename T , typename String >

using nlohmann::detail::key_function_t

Initial value:

 
            decltype(std::declval<T&>().key(std::declval<String&>()))

Definition at line 8209 of file json.hpp.

key_type_t

template<typename T >

using nlohmann::detail::key_type_t = typename T::key_type

Definition at line 3479 of file json.hpp.

make_index_sequence

template<size_t N>

using nlohmann::detail::make_index_sequence = make_integer_sequence<size_t, N>

Definition at line 3160 of file json.hpp.

make_integer_sequence

template<typename T , T N>

using nlohmann::detail::make_integer_sequence = typename utility_internal::Gen<T, N>::type

Definition at line 3152 of file json.hpp.

mapped_type_t

template<typename T >

using nlohmann::detail::mapped_type_t = typename T::mapped_type

Definition at line 3476 of file json.hpp.

null_function_t

template<typename T >

using nlohmann::detail::null_function_t = decltype(std::declval<T&>().null())

Definition at line 8178 of file json.hpp.

number_float_function_t

template<typename T , typename Float , typename String >

using nlohmann::detail::number_float_function_t

Initial value:

 decltype(std::declval<T&>().number_float(
            std::declval<Float>(), std::declval<const String&>()))

Definition at line 8193 of file json.hpp.

number_integer_function_t

template<typename T , typename Integer >

using nlohmann::detail::number_integer_function_t

Initial value:

 
            decltype(std::declval<T&>().number_integer(std::declval<Integer>()))

Definition at line 8185 of file json.hpp.

number_unsigned_function_t

template<typename T , typename Unsigned >

using nlohmann::detail::number_unsigned_function_t

Initial value:

 
            decltype(std::declval<T&>().number_unsigned(std::declval<Unsigned>()))

Definition at line 8189 of file json.hpp.

output_adapter_t

template<typename CharType >

using nlohmann::detail::output_adapter_t = std::shared_ptr<output_adapter_protocol<CharType>>

a type to simplify interfaces

Definition at line 13484 of file json.hpp.

parse_error_function_t

template<typename T , typename Exception >

using nlohmann::detail::parse_error_function_t

Initial value:

 decltype(std::declval<T&>().parse_error(
            std::declval<std::size_t>(), std::declval<const std::string&>(),
            std::declval<const Exception&>()))

Definition at line 8223 of file json.hpp.

parser_callback_t

template<typename BasicJsonType >

using nlohmann::detail::parser_callback_t

Initial value:

 
            std::function<bool(int , parse_event_t , BasicJsonType& )>

Definition at line 10873 of file json.hpp.

pointer_t

template<typename T >

using nlohmann::detail::pointer_t = typename T::pointer

Definition at line 3488 of file json.hpp.

reference_t

template<typename T >

using nlohmann::detail::reference_t = typename T::reference

Definition at line 3491 of file json.hpp.

start_array_function_t

template<typename T >

using nlohmann::detail::start_array_function_t

Initial value:

 
            decltype(std::declval<T&>().start_array(std::declval<std::size_t>()))

Definition at line 8216 of file json.hpp.

start_object_function_t

template<typename T >

using nlohmann::detail::start_object_function_t

Initial value:

 
            decltype(std::declval<T&>().start_object(std::declval<std::size_t>()))

Definition at line 8205 of file json.hpp.

string_function_t

template<typename T , typename String >

using nlohmann::detail::string_function_t

Initial value:

 
            decltype(std::declval<T&>().string(std::declval<String&>()))

Definition at line 8197 of file json.hpp.

to_json_function

template<typename T , typename... Args>

using nlohmann::detail::to_json_function = decltype(T::to_json(std::declval<Args>()...))

Definition at line 3500 of file json.hpp.

uncvref_t

template<typename T >

using nlohmann::detail::uncvref_t = typename std::remove_cv<typename std::remove_reference<T>::type>::type

Definition at line 3050 of file json.hpp.

value_type_t

template<typename T >

using nlohmann::detail::value_type_t = typename T::value_type

Definition at line 3482 of file json.hpp.

void_t

template<typename ... Ts>

using nlohmann::detail::void_t = typename make_void<Ts...>::type

Definition at line 3227 of file json.hpp.

Enumeration Type Documentation

cbor_tag_handler_t

enum class nlohmann::detail::cbor_tag_handler_t

strong

how to treat CBOR tags

Enumerator
error	throw a parse_error exception in case of a tag
ignore	ignore tags
store	store tags as binary type

Definition at line 8325 of file json.hpp.

error_handler_t

enum class nlohmann::detail::error_handler_t

strong

how to treat decoding errors

Enumerator
strict	throw a type_error exception in case of invalid UTF-8
replace	replace invalid UTF-8 sequences with U+FFFD
ignore	ignore invalid UTF-8 sequences

Definition at line 16360 of file json.hpp.

input_format_t

enum class nlohmann::detail::input_format_t

strong

the supported input formats

Enumerator
json
cbor
msgpack
ubjson
bson

Definition at line 5358 of file json.hpp.

parse_event_t

enum class nlohmann::detail::parse_event_t : std::uint8_t

strong

Enumerator
object_start	the parser read { and started to process a JSON object
object_end	the parser read } and finished processing a JSON object
array_start	the parser read [ and started to process a JSON array
array_end	the parser read ] and finished processing a JSON array
key	the parser read a key of a value in an object
value	the parser finished reading a JSON value

Definition at line 10856 of file json.hpp.

value_t

enum class nlohmann::detail::value_t : std::uint8_t

strong

the JSON type enumeration

This enumeration collects the different JSON types. It is internally used to distinguish the stored values, and the functions basic_json::is_null(), basic_json::is_object(), basic_json::is_array(), basic_json::is_string(), basic_json::is_boolean(), basic_json::is_number() (with basic_json::is_number_integer(), basic_json::is_number_unsigned(), and basic_json::is_number_float()), basic_json::is_discarded(), basic_json::is_primitive(), and basic_json::is_structured() rely on it.

Note

There are three enumeration entries (number_integer, number_unsigned, and number_float), because the library distinguishes these three types for numbers: basic_json::number_unsigned_t is used for unsigned integers, basic_json::number_integer_t is used for signed integers, and basic_json::number_float_t is used for floating-point numbers or to approximate integers which do not fit in the limits of their respective type.

See also

see basic_json::basic_json(const value_t value_type) – create a JSON value with the default value for a given type

Since

version 1.0.0

Enumerator
null	null value
object	object (unordered set of name/value pairs)
array	array (ordered collection of values)
string	string value
boolean	boolean value
number_integer	number value (signed integer)
number_unsigned	number value (unsigned integer)
number_float	number value (floating-point)
binary	binary array (ordered collection of bytes)
discarded	discarded by the parser callback function

Definition at line 120 of file json.hpp.

Function Documentation

combine()

std::size_t nlohmann::detail::combine ( std::size_t seed, std::size_t h )

inlinenoexcept

Definition at line 5204 of file json.hpp.

conditional_static_cast()

template<typename T , typename U , enable_if_t< !std::is_same< T, U >::value, int > = 0>

T nlohmann::detail::conditional_static_cast

(

U

value

)

Definition at line 3873 of file json.hpp.

escape()

std::string nlohmann::detail::escape ( std::string s )

inline

string escaping as described in RFC 6901 (Sect. 4)

Parameters

[in]

s

string to escape

Returns

escaped string

Note the order of escaping "~" to "~0" and "/" to "~1" is important.

Definition at line 2559 of file json.hpp.

from_json() [1/19]

template<typename BasicJsonType , typename T , std::size_t N>

auto nlohmann::detail::from_json	(	BasicJsonType &&	j,
		identity_tag< std::array< T, N > >	tag ) -> decltype(from_json_inplace_array_impl(std::forward<BasicJsonType>(j), tag, make_index_sequence<N> {}))

Definition at line 4140 of file json.hpp.

from_json() [2/19]

template<typename BasicJsonType , typename TupleRelated >

auto nlohmann::detail::from_json	(	BasicJsonType &&	j,
		TupleRelated &&	t ) -> decltype(from_json_tuple_impl(std::forward<BasicJsonType>(j), std::forward<TupleRelated>(t), priority_tag<3> {}))

Definition at line 4264 of file json.hpp.

from_json() [3/19]

template<typename BasicJsonType , typename ArithmeticType , enable_if_t< std::is_arithmetic< ArithmeticType >::value &&!std::is_same< ArithmeticType, typename BasicJsonType::number_unsigned_t >::value &&!std::is_same< ArithmeticType, typename BasicJsonType::number_integer_t >::value &&!std::is_same< ArithmeticType, typename BasicJsonType::number_float_t >::value &&!std::is_same< ArithmeticType, typename BasicJsonType::boolean_t >::value, int > = 0>

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		ArithmeticType &	val )

Definition at line 4196 of file json.hpp.

from_json() [4/19]

template<typename BasicJsonType , typename ConstructibleArrayType , enable_if_t< is_constructible_array_type< BasicJsonType, ConstructibleArrayType >::value &&!is_constructible_object_type< BasicJsonType, ConstructibleArrayType >::value &&!is_constructible_string_type< BasicJsonType, ConstructibleArrayType >::value &&!std::is_same< ConstructibleArrayType, typename BasicJsonType::binary_t >::value &&!is_basic_json< ConstructibleArrayType >::value, int > = 0>

auto nlohmann::detail::from_json	(	const BasicJsonType &	j,
		ConstructibleArrayType &	arr ) -> decltype(from_json_array_impl(j, arr, priority_tag<3> {}), j.template get<typename ConstructibleArrayType::value_type>(), void())

Definition at line 4119 of file json.hpp.

from_json() [5/19]

template<typename BasicJsonType , typename ConstructibleObjectType , enable_if_t< is_constructible_object_type< BasicJsonType, ConstructibleObjectType >::value, int > = 0>

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		ConstructibleObjectType &	obj )

Definition at line 4164 of file json.hpp.

from_json() [6/19]

template<typename BasicJsonType , typename ConstructibleStringType , enable_if_t< is_constructible_string_type< BasicJsonType, ConstructibleStringType >::value &&!std::is_same< typename BasicJsonType::string_t, ConstructibleStringType >::value, int > = 0>

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		ConstructibleStringType &	s )

Definition at line 3968 of file json.hpp.

from_json() [7/19]

template<typename BasicJsonType , typename EnumType , enable_if_t< std::is_enum< EnumType >::value, int > = 0>

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		EnumType &	e )

Definition at line 3998 of file json.hpp.

from_json() [8/19]

template<typename BasicJsonType , typename T , typename Allocator , enable_if_t< is_getable< BasicJsonType, T >::value, int > = 0>

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		std::forward_list< T, Allocator > &	l )

Definition at line 4008 of file json.hpp.

from_json() [9/19]

template<typename BasicJsonType , typename Key , typename Value , typename Compare , typename Allocator , typename = enable_if_t < !std::is_constructible < typename BasicJsonType::string_t, Key >::value >>

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		std::map< Key, Value, Compare, Allocator > &	m )

Definition at line 4278 of file json.hpp.

from_json() [10/19]

template<typename BasicJsonType , typename Key , typename Value , typename Hash , typename KeyEqual , typename Allocator , typename = enable_if_t < !std::is_constructible < typename BasicJsonType::string_t, Key >::value >>

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		std::unordered_map< Key, Value, Hash, KeyEqual, Allocator > &	m )

Definition at line 4298 of file json.hpp.

from_json() [11/19]

template<typename BasicJsonType , typename T , enable_if_t< is_getable< BasicJsonType, T >::value, int > = 0>

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		std::valarray< T > &	l )

Definition at line 4025 of file json.hpp.

from_json() [12/19]

template<typename BasicJsonType , typename T , std::size_t N>

auto nlohmann::detail::from_json	(	const BasicJsonType &	j,
		T(&)	arr[N] ) -> decltype(j.template get<T>(), void())

Definition at line 4040 of file json.hpp.

from_json() [13/19]

template<typename BasicJsonType >

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		typename BasicJsonType::binary_t &	bin )

Definition at line 4152 of file json.hpp.

from_json() [14/19]

template<typename BasicJsonType >

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		typename BasicJsonType::boolean_t &	b )

Definition at line 3942 of file json.hpp.

from_json() [15/19]

template<typename BasicJsonType >

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		typename BasicJsonType::number_float_t &	val )

Definition at line 3979 of file json.hpp.

from_json() [16/19]

template<typename BasicJsonType >

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		typename BasicJsonType::number_integer_t &	val )

Definition at line 3991 of file json.hpp.

from_json() [17/19]

template<typename BasicJsonType >

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		typename BasicJsonType::number_unsigned_t &	val )

Definition at line 3985 of file json.hpp.

from_json() [18/19]

template<typename BasicJsonType >

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		typename BasicJsonType::string_t &	s )

Definition at line 3952 of file json.hpp.

from_json() [19/19]

template<typename BasicJsonType >

void nlohmann::detail::from_json	(	const BasicJsonType &	j,
		typename std::nullptr_t &	n )

Definition at line 3895 of file json.hpp.

from_json_array_impl() [1/4]

template<typename BasicJsonType , typename ConstructibleArrayType , enable_if_t< std::is_assignable< ConstructibleArrayType &, ConstructibleArrayType >::value, int > = 0>

void nlohmann::detail::from_json_array_impl	(	const BasicJsonType &	j,
		ConstructibleArrayType &	arr,
		priority_tag< 0 >	)

Definition at line 4094 of file json.hpp.

from_json_array_impl() [2/4]

template<typename BasicJsonType , typename ConstructibleArrayType , enable_if_t< std::is_assignable< ConstructibleArrayType &, ConstructibleArrayType >::value, int > = 0>

auto nlohmann::detail::from_json_array_impl	(	const BasicJsonType &	j,
		ConstructibleArrayType &	arr,
		priority_tag< 1 >	) -> decltype( arr.reserve(std::declval<typename ConstructibleArrayType::size_type>()), j.template get<typename ConstructibleArrayType::value_type>(), void())

Definition at line 4070 of file json.hpp.

from_json_array_impl() [3/4]

template<typename BasicJsonType , typename T , std::size_t N>

auto nlohmann::detail::from_json_array_impl	(	const BasicJsonType &	j,
		std::array< T, N > &	arr,
		priority_tag< 2 >	) -> decltype(j.template get<T>(), void())

Definition at line 4056 of file json.hpp.

from_json_array_impl() [4/4]

template<typename BasicJsonType >

void nlohmann::detail::from_json_array_impl	(	const BasicJsonType &	j,
		typename BasicJsonType::array_t &	arr,
		priority_tag< 3 >	)

Definition at line 4050 of file json.hpp.

from_json_inplace_array_impl()

template<typename BasicJsonType , typename T , std::size_t... Idx>

std::array< T, sizeof...(Idx)> nlohmann::detail::from_json_inplace_array_impl	(	BasicJsonType &&	j,
		identity_tag< std::array< T, sizeof...(Idx)> >	,
		index_sequence< Idx... >	)

Definition at line 4133 of file json.hpp.

from_json_tuple_impl() [1/4]

template<typename BasicJsonType , class A1 , class A2 >

std::pair< A1, A2 > nlohmann::detail::from_json_tuple_impl	(	BasicJsonType &&	j,
		identity_tag< std::pair< A1, A2 > >	,
		priority_tag< 0 >	)

Definition at line 4239 of file json.hpp.

from_json_tuple_impl() [2/4]

template<typename BasicJsonType , typename... Args>

std::tuple< Args... > nlohmann::detail::from_json_tuple_impl	(	BasicJsonType &&	j,
		identity_tag< std::tuple< Args... > >	,
		priority_tag< 2 >	)

Definition at line 4252 of file json.hpp.

from_json_tuple_impl() [3/4]

template<typename BasicJsonType , typename A1 , typename A2 >

void nlohmann::detail::from_json_tuple_impl	(	BasicJsonType &&	j,
		std::pair< A1, A2 > &	p,
		priority_tag< 1 >	)

Definition at line 4246 of file json.hpp.

from_json_tuple_impl() [4/4]

template<typename BasicJsonType , typename... Args>

void nlohmann::detail::from_json_tuple_impl	(	BasicJsonType &&	j,
		std::tuple< Args... > &	t,
		priority_tag< 3 >	)

Definition at line 4258 of file json.hpp.

from_json_tuple_impl_base()

template<typename BasicJsonType , typename... Args, std::size_t... Idx>

std::tuple< Args... > nlohmann::detail::from_json_tuple_impl_base	(	BasicJsonType &&	j,
		index_sequence< Idx... >	)

Definition at line 4233 of file json.hpp.

get()

template<std::size_t N, typename IteratorType , enable_if_t< N==0, int > = 0>

auto nlohmann::detail::get

(

const nlohmann::detail::iteration_proxy_value< IteratorType > &

i

)

-> decltype(i.key())

Definition at line 4498 of file json.hpp.

get_arithmetic_value()

template<typename BasicJsonType , typename ArithmeticType , enable_if_t< std::is_arithmetic< ArithmeticType >::value &&!std::is_same< ArithmeticType, typename BasicJsonType::boolean_t >::value, int > = 0>

void nlohmann::detail::get_arithmetic_value	(	const BasicJsonType &	j,
		ArithmeticType &	val )

Definition at line 3909 of file json.hpp.

hash()

template<typename BasicJsonType >

std::size_t nlohmann::detail::hash

(

const BasicJsonType &

j

)

hash a JSON value

The hash function tries to rely on std::hash where possible. Furthermore, the type of the JSON value is taken into account to have different hash values for null, 0, 0U, and false, etc.

Template Parameters

BasicJsonType

basic_json specialization

Parameters

j	JSON value to hash

Returns

hash value of j

Definition at line 5222 of file json.hpp.

input_adapter() [1/7]

template<typename CharT , typename std::enable_if< std::is_pointer< CharT >::value &&!std::is_array< CharT >::value &&std::is_integral< typename std::remove_pointer< CharT >::type >::value &&sizeof(typename std::remove_pointer< CharT >::type)==1, int >::type = 0>

contiguous_bytes_input_adapter nlohmann::detail::input_adapter

(

CharT

b

)

Definition at line 5771 of file json.hpp.

input_adapter() [2/7]

template<typename ContainerType >

container_input_adapter_factory_impl::container_input_adapter_factory< ContainerType >::adapter_type nlohmann::detail::input_adapter

(

const ContainerType &

container

)

Definition at line 5738 of file json.hpp.

input_adapter() [3/7]

template<typename IteratorType >

iterator_input_adapter_factory< IteratorType >::adapter_type nlohmann::detail::input_adapter	(	IteratorType	first,
		IteratorType	last )

Definition at line 5704 of file json.hpp.

input_adapter() [4/7]

file_input_adapter nlohmann::detail::input_adapter ( std::FILE * file )

inline

Definition at line 5745 of file json.hpp.

input_adapter() [5/7]

input_stream_adapter nlohmann::detail::input_adapter ( std::istream && stream )

inline

Definition at line 5755 of file json.hpp.

input_adapter() [6/7]

input_stream_adapter nlohmann::detail::input_adapter ( std::istream & stream )

inline

Definition at line 5750 of file json.hpp.

input_adapter() [7/7]

template<typename T , std::size_t N>

auto nlohmann::detail::input_adapter

(

T(&)

array[N]

)

-> decltype(input_adapter(array, array + N))

Definition at line 5779 of file json.hpp.

int_to_string()

template<typename string_type >

void nlohmann::detail::int_to_string	(	string_type &	target,
		std::size_t	value )

Definition at line 4367 of file json.hpp.

little_endianess()

static bool nlohmann::detail::little_endianess ( int num = 1 )

inlinestaticnoexcept

determine system byte order

Returns

true if and only if system's byte order is little endian

Note

from https://stackoverflow.com/a/1001328/266378

Definition at line 8339 of file json.hpp.

operator<()

bool nlohmann::detail::operator< ( const value_t lhs, const value_t rhs )

inlinenoexcept

comparison operator for JSON types

Returns an ordering that is similar to Python:

• order: null < boolean < number < object < array < string < binary
• furthermore, each type is not smaller than itself
• discarded values are not comparable
• binary is represented as a b"" string in python and directly comparable to a string; however, making a binary array directly comparable with a string would be surprising behavior in a JSON file.

Since

version 1.0.0

Definition at line 147 of file json.hpp.

replace_substring()

void nlohmann::detail::replace_substring ( std::string & s, const std::string & f, const std::string & t )

inline

replace all occurrences of a substring by another string

Parameters

[in,out]	s	the string to manipulate; changed so that all occurrences of f are replaced with t
[in]	f	the substring to replace with t
[in]	t	the string to replace f

Precondition

The search string f must not be empty. This precondition is enforced with an assertion.

Since

version 2.0.0

Definition at line 2540 of file json.hpp.

to_chars()

template<typename FloatType >

JSON_HEDLEY_RETURNS_NON_NULL char * nlohmann::detail::to_chars	(	char *	first,
		const char *	last,
		FloatType	value )

generates a decimal representation of the floating-point number value in [first, last).

The format of the resulting decimal representation is similar to printf's g format. Returns an iterator pointing past-the-end of the decimal representation.

Note

The input number must be finite, i.e. NaN's and Inf's are not supported.

The buffer must be large enough.

The result is NOT null-terminated.

Definition at line 16283 of file json.hpp.

to_json() [1/17]

template<typename BasicJsonType , typename CompatibleNumberIntegerType , enable_if_t< is_compatible_integer_type< typename BasicJsonType::number_integer_t, CompatibleNumberIntegerType >::value, int > = 0>

void nlohmann::detail::to_json ( BasicJsonType & j, CompatibleNumberIntegerType val )

noexcept

Definition at line 4820 of file json.hpp.

to_json() [2/17]

template<typename BasicJsonType , typename CompatibleNumberUnsignedType , enable_if_t< is_compatible_integer_type< typename BasicJsonType::number_unsigned_t, CompatibleNumberUnsignedType >::value, int > = 0>

void nlohmann::detail::to_json ( BasicJsonType & j, CompatibleNumberUnsignedType val )

noexcept

Definition at line 4813 of file json.hpp.

to_json() [3/17]

template<typename BasicJsonType , typename CompatibleArrayType , enable_if_t< is_compatible_array_type< BasicJsonType, CompatibleArrayType >::value &&!is_compatible_object_type< BasicJsonType, CompatibleArrayType >::value &&!is_compatible_string_type< BasicJsonType, CompatibleArrayType >::value &&!std::is_same< typename BasicJsonType::binary_t, CompatibleArrayType >::value &&!is_basic_json< CompatibleArrayType >::value, int > = 0>

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		const CompatibleArrayType &	arr )

Definition at line 4847 of file json.hpp.

to_json() [4/17]

template<typename BasicJsonType , typename CompatibleObjectType , enable_if_t< is_compatible_object_type< BasicJsonType, CompatibleObjectType >::value &&!is_basic_json< CompatibleObjectType >::value, int > = 0>

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		const CompatibleObjectType &	obj )

Definition at line 4873 of file json.hpp.

to_json() [5/17]

template<typename BasicJsonType , typename CompatibleString , enable_if_t< std::is_constructible< typename BasicJsonType::string_t, CompatibleString >::value, int > = 0>

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		const CompatibleString &	s )

Definition at line 4793 of file json.hpp.

to_json() [6/17]

template<typename BasicJsonType , typename T1 , typename T2 , enable_if_t< std::is_constructible< BasicJsonType, T1 >::value &&std::is_constructible< BasicJsonType, T2 >::value, int > = 0>

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		const std::pair< T1, T2 > &	p )

Definition at line 4895 of file json.hpp.

to_json() [7/17]

template<typename BasicJsonType , typename T , enable_if_t< std::is_convertible< T, BasicJsonType >::value, int > = 0>

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		const std::valarray< T > &	arr )

Definition at line 4860 of file json.hpp.

to_json() [8/17]

template<typename BasicJsonType >

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		const std::vector< bool > &	e )

Definition at line 4834 of file json.hpp.

to_json() [9/17]

template<typename BasicJsonType , typename T , enable_if_t< std::is_same< T, iteration_proxy_value< typename BasicJsonType::iterator > >::value, int > = 0>

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		const T &	b )

Definition at line 4903 of file json.hpp.

to_json() [10/17]

template<typename BasicJsonType , typename T , std::size_t N, enable_if_t< !std::is_constructible< typename BasicJsonType::string_t, const T(&)[N]>::value, int > = 0>

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		const T(&)	arr[N] )

Definition at line 4889 of file json.hpp.

to_json() [11/17]

template<typename BasicJsonType >

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		const typename BasicJsonType::binary_t &	bin )

Definition at line 4853 of file json.hpp.

to_json() [12/17]

template<typename BasicJsonType , typename EnumType , enable_if_t< std::is_enum< EnumType >::value, int > = 0>

void nlohmann::detail::to_json ( BasicJsonType & j, EnumType e )

noexcept

Definition at line 4827 of file json.hpp.

to_json() [13/17]

template<typename BasicJsonType , typename FloatType , enable_if_t< std::is_floating_point< FloatType >::value, int > = 0>

void nlohmann::detail::to_json ( BasicJsonType & j, FloatType val )

noexcept

Definition at line 4806 of file json.hpp.

to_json() [14/17]

template<typename BasicJsonType , typename T , enable_if_t< std::is_same< T, typename BasicJsonType::boolean_t >::value, int > = 0>

void nlohmann::detail::to_json ( BasicJsonType & j, T b )

noexcept

Definition at line 4786 of file json.hpp.

to_json() [15/17]

template<typename BasicJsonType >

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		typename BasicJsonType::array_t &&	arr )

Definition at line 4866 of file json.hpp.

to_json() [16/17]

template<typename BasicJsonType >

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		typename BasicJsonType::object_t &&	obj )

Definition at line 4879 of file json.hpp.

to_json() [17/17]

template<typename BasicJsonType >

void nlohmann::detail::to_json	(	BasicJsonType &	j,
		typename BasicJsonType::string_t &&	s )

Definition at line 4799 of file json.hpp.

to_json_tuple_impl()

template<typename BasicJsonType , typename Tuple , std::size_t... Idx>

void nlohmann::detail::to_json_tuple_impl	(	BasicJsonType &	j,
		const Tuple &	t,
		index_sequence< Idx... >	)

Definition at line 4909 of file json.hpp.

unescape()

static void nlohmann::detail::unescape ( std::string & s )

static

string unescaping as described in RFC 6901 (Sect. 4)

Parameters

[in]

s

string to unescape

Returns

unescaped string

Note the order of escaping "~1" to "/" and "~0" to "~" is important.

Definition at line 2573 of file json.hpp.