JSON for Modern C++ 3.9.1

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accept
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end
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~basic_json
| ## ◆ swap() [3/6] 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, class BinaryType = std::vector<std::uint8_t>>
void nlohmann::basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType >::swap | ( | object_t & | other | ) |
| inline
  Exchanges the contents of a JSON object with those of other. Does not invoke any move, copy, or swap operations on individual elements. All iterators and references remain valid. The past-the-end iterator is invalidated. Parameters
  [in,out] | other | object to exchange the contents with
  Exceptions
  type_error.310 | when JSON value is not an object; example: `"cannot use swap() with string"`
  Complexity Constant. Example The example below shows how objects can be swapped with `swap()`. 1 #include <iostream> 2 #include <nlohmann/json.hpp> 3 4 using json = nlohmann::json; 5 6 int main() 7 { 8 // create a JSON value 9 json value = { {"translation", {{"one", "eins"}, {"two", "zwei"}}} }; 10 11 // create an object_t 12 json::object_t object = {{"cow", "Kuh"}, {"dog", "Hund"}}; 13 14 // swap the object stored in the JSON value 15 value["translation"].swap(object); 16 17 // output the values 18 std::cout << "value = " << value << '\n'; 19 std::cout << "object = " << object << '\n'; 20 } Output (play with this example online):
      value = {"translation":{"cow":"Kuh","dog":"Hund"}}
      object = {"one":"eins","two":"zwei"}
  The example code above can be translated with
      g++ -std=c++11 -Isingle_include doc/examples/swap__object_t.cpp -o swap__object_t
Since version 1.0.0 Definition at line 22485 of file json.hpp.

nlohmann::basic_json::value
ValueType value(const typename object_t::key_type &key, const ValueType &default_value) const
access specified object element with default value
Definition: json.hpp:20312
nlohmann::basic_json::object_t
ObjectType< StringType, basic_json, object_comparator_t, AllocatorType< std::pair< const StringType, basic_json > >> object_t
a type for an object
Definition: json.hpp:17012
nlohmann::json
basic_json<> json
default JSON class
Definition: json.hpp:2940