nlohmann::basic_json::json_value Union Reference

a JSON value More...

Public Member Functions
	json_value ()=default
	default constructor (for null values)
	json_value (boolean_t v) noexcept
	constructor for booleans
	json_value (number_integer_t v) noexcept
	constructor for numbers (integer)
	json_value (number_unsigned_t v) noexcept
	constructor for numbers (unsigned)
	json_value (number_float_t v) noexcept
	constructor for numbers (floating-point)
	json_value (value_t t)
	constructor for empty values of a given type
	json_value (const string_t &value)
	constructor for strings
	json_value (string_t &&value)
	constructor for rvalue strings
	json_value (const object_t &value)
	constructor for objects
	json_value (object_t &&value)
	constructor for rvalue objects
	json_value (const array_t &value)
	constructor for arrays
	json_value (array_t &&value)
	constructor for rvalue arrays
	json_value (const typename binary_t::container_type &value)
	constructor for binary arrays
	json_value (typename binary_t::container_type &&value)
	constructor for rvalue binary arrays
	json_value (const binary_t &value)
	constructor for binary arrays (internal type)
	json_value (binary_t &&value)
	constructor for rvalue binary arrays (internal type)

Public Attributes
object_t *	object
	object (stored with pointer to save storage)
array_t *	array
	array (stored with pointer to save storage)
string_t *	string
	string (stored with pointer to save storage)
binary_t *	binary
	binary (stored with pointer to save storage)
boolean_t	boolean
	boolean
number_integer_t	number_integer
	number (integer)
number_unsigned_t	number_unsigned
	number (unsigned integer)
number_float_t	number_float
	number (floating-point)

Detailed Description

a JSON value

The actual storage for a JSON value of the basic_json class. This union combines the different storage types for the JSON value types defined in value_t.

JSON type	value_t type	used type
object	object	pointer to object_t
array	array	pointer to array_t
string	string	pointer to string_t
boolean	boolean	boolean_t
number	number_integer	number_integer_t
number	number_unsigned	number_unsigned_t
number	number_float	number_float_t
binary	binary	pointer to binary_t
null	null	no value is stored

Note

Variable-length types (objects, arrays, and strings) are stored as pointers. The size of the union should not exceed 64 bits if the default value types are used.

Since

version 1.0.0