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_msgpack front front get get get get get get_allocator get_ptr get_ptr get_ref get_ref 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 iterator iterator_wrapper iterator_wrapper json_serializer max_size meta number_float_t number_integer_t number_unsigned_t object 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[] operator[] operator[] other_error out_of_range parse parse parse 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_msgpack type type_error type_name unflatten value value value value value_t value_type ~basic_json

object() template<template< typename U, typename V, typename... Args > class ObjectType = std::map, template< typename U, typename... Args > 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 U > class AllocatorType = std::allocator, template< typename T, typename SFINAE=void > class JSONSerializer = adl_serializer> static basic_json nlohmann::basic_json::object ( std::initializer_list< basic_json >  init = std::initializer_list<basic_json>() ) inlinestatic Creates a JSON object value from a given initializer list. The initializer lists elements must be pairs, and their first elements must be strings. If the initializer list is empty, the empty object {} is created. Note This function is only added for symmetry reasons. In contrast to the related function array(std::initializer_list<basic_json>), there are no cases which can only be expressed by this function. That is, any initializer list init can also be passed to the initializer list constructor basic_json(std::initializer_list<basic_json>, bool, value_t). Parameters [in] init initializer list to create an object from (optional) Returns JSON object value Exceptions type_error.301 if init is not a list of pairs whose first elements are strings. In this case, no object can be created. When such a value is passed to basic_json(std::initializer_list<basic_json>, bool, value_t), an array would have been created from the passed initializer list init. See example below. Complexity Linear in the size of init. Example The following code shows an example for the object function. #include "json.hpp" using json = nlohmann::json; int main() { // create JSON objects json j_no_init_list = json::object(); json j_empty_init_list = json::object({}); json j_list_of_pairs = json::object({ {"one", 1}, {"two", 2} }); // serialize the JSON objects std::cout << j_no_init_list << '\n'; std::cout << j_empty_init_list << '\n'; std::cout << j_list_of_pairs << '\n'; // example for an exception try { // can only create an object from a list of pairs json j_invalid_object = json::object({{ "one", 1, 2 }}); } catch (json::type_error& e) { std::cout << e.what() << '\n'; } } Output (play with this example online): {} {} {"one":1,"two":2} [json.exception.type_error.301] cannot create object from initializer list The example code above can be translated with g++ -std=c++11 -Isrc doc/examples/object.cpp -o object See also basic_json(std::initializer_list<basic_json>, bool, value_t) – create a JSON value from an initializer list array(std::initializer_list<basic_json>) – create a JSON array value from an initializer list Since version 1.0.0 Definition at line 2476 of file json.hpp.