JSON for Modern C++ 3.0

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~basic_json
| 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 = int64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator>
void nlohmann::basic_json::push_back | ( | const basic_json & | value | ) |
| inline
  add an object to an array Appends the given element value to the end of the JSON value. If the function is called on a JSON null value, an empty array is created before appending value. Parameters
  value | the value to add to the JSON array
  Exceptions
  std::domain_error | when called on a type other than JSON array or null
  Complexity Amortized constant. Example The example shows how `push_back` and `+=` can be used to add elements to a JSON array. Note how the `null` value was silently converted to a JSON array. 1 #include <json.hpp> 2 3 using namespace nlohmann; 4 5 int main() 6 { 7 // create JSON values 8 json array = {1, 2, 3, 4, 5}; 9 json null; 10 11 // print values 12 std::cout << array << '\n'; 13 std::cout << null << '\n'; 14 15 // add values 16 array.push_back(6); 17 array += 7; 18 null += "first"; 19 null += "second"; 20 21 // print values 22 std::cout << array << '\n'; 23 std::cout << null << '\n'; 24 } nlohmann::basic_json a class to store JSON values Definition: json.hpp:130 nlohmann namespace for Niels Lohmann Definition: json.hpp:55 nlohmann::basic_json::push_back void push_back(basic_json &&value) add an object to an array Definition: json.hpp:3615 Output (play with this example online):
      [1,2,3,4,5]
      null
      [1,2,3,4,5,6,7]
      ["first","second"]
  The example code above can be translated with
      g++ -std=c++11 -Isrc doc/examples/push_back.cpp -o push_back