accept accept accept allocator_type array array_t at at at at at at back back basic_json basic_json basic_json basic_json basic_json basic_json basic_json basic_json begin begin boolean_t cbegin cend clear const_iterator const_pointer const_reference const_reverse_iterator count crbegin crend detail::external_constructor diff difference_type dump emplace emplace_back empty end end erase erase erase erase exception find find flatten from_cbor from_cbor from_msgpack from_msgpack front front get get get get get get_allocator get_ptr get_ptr get_ref get_ref initializer_list_t insert insert insert insert insert insert invalid_iterator is_array is_boolean is_discarded is_null is_number is_number_float is_number_integer is_number_unsigned is_object is_primitive is_string is_structured items items iterator iterator_wrapper iterator_wrapper json_pointer json_serializer max_size meta number_float_t number_integer_t number_unsigned_t object object_comparator_t object_t operator value_t operator ValueType operator!= operator!= operator!= operator+= operator+= operator+= operator+= operator< operator< operator< operator<< operator<< operator<= operator<= operator<= operator= operator== operator== operator== operator> operator> operator> operator>= operator>= operator>= operator>> operator>> operator[] operator[] operator[] operator[] operator[] operator[] operator[] operator[] other_error out_of_range parse parse parse parse_error parse_event_t parser_callback_t patch pointer push_back push_back push_back push_back rbegin rbegin reference rend rend reverse_iterator size size_type string_t swap swap swap swap to_cbor to_cbor to_cbor to_msgpack to_msgpack to_msgpack type type_error type_name unflatten update update value value value value value_t value_type ~basic_json

number_unsigned_t template<template< typename, typename, typename... > class ObjectType = std::map, template< typename, typename... > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename > class AllocatorType = std::allocator, template< typename, typename=void > class JSONSerializer = adl_serializer> using nlohmann::basic_json::number_unsigned_t = NumberUnsignedType RFC 7159 describes numbers as follows: The representation of numbers is similar to that used in most programming languages. A number is represented in base 10 using decimal digits. It contains an integer component that may be prefixed with an optional minus sign, which may be followed by a fraction part and/or an exponent part. Leading zeros are not allowed. (...) Numeric values that cannot be represented in the grammar below (such as Infinity and NaN) are not permitted. This description includes both integer and floating-point numbers. However, C++ allows more precise storage if it is known whether the number is a signed integer, an unsigned integer or a floating-point number. Therefore, three different types, number_integer_t, number_unsigned_t and number_float_t are used. To store unsigned integer numbers in C++, a type is defined by the template parameter NumberUnsignedType which chooses the type to use. Default type With the default values for NumberUnsignedType (uint64_t), the default value for number_unsigned_t is: uint64_t Default behavior The restrictions about leading zeros is not enforced in C++. Instead, leading zeros in integer literals lead to an interpretation as octal number. Internally, the value will be stored as decimal number. For instance, the C++ integer literal 010 will be serialized to 8. During deserialization, leading zeros yield an error. Not-a-number (NaN) values will be serialized to null. Limits RFC 7159 specifies: An implementation may set limits on the range and precision of numbers. When the default type is used, the maximal integer number that can be stored is 18446744073709551615 (UINT64_MAX) and the minimal integer number that can be stored is 0. Integer numbers that are out of range will yield over/underflow when used in a constructor. During deserialization, too large or small integer numbers will be automatically be stored as number_integer_t or number_float_t. RFC 7159 further states: Note that when such software is used, numbers that are integers and are in the range are interoperable in the sense that implementations will agree exactly on their numeric values. As this range is a subrange (when considered in conjunction with the number_integer_t type) of the exactly supported range [0, UINT64_MAX], this class's integer type is interoperable. Storage Integer number values are stored directly inside a basic_json type. See also number_float_t – type for number values (floating-point) number_integer_t – type for number values (integer) Since version 2.0.0 Definition at line 7988 of file json.hpp.