JSON for Modern C++  2.0.0
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 NumberUnsignedType = uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator>
nlohmann::basic_json::basic_json ( const basic_json other)
inline

Creates a copy of a given JSON value.

Parameters
[in]otherthe JSON value to copy
Complexity
Linear in the size of other.
Requirements
This function helps basic_json satisfying the Container requirements:
  • The complexity is linear.
  • As postcondition, it holds: other == basic_json(other).
Exceptions
std::bad_allocif allocation for object, array, or string fails.
Example
The following code shows an example for the copy constructor.
1 #include <json.hpp>
2 
3 using json = nlohmann::json;
4 
5 int main()
6 {
7  // create a JSON array
8  json j1 = {"one", "two", 3, 4.5, false};
9 
10  // create a copy
11  json j2(j1);
12 
13  // serialize the JSON array
14  std::cout << j1 << " = " << j2 << '\n';
15  std::cout << std::boolalpha << (j1 == j2) << '\n';
16 }
basic_json<> json
default JSON class
Definition: json.hpp:8653
Output (play with this example online):
["one","two",3,4.5,false] = ["one","two",3,4.5,false]
true
The example code above can be translated with
g++ -std=c++11 -Isrc doc/examples/basic_json__basic_json.cpp -o basic_json__basic_json 
Since
version 1.0.0

Definition at line 1857 of file json.hpp.