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>

nlohmann::basic_json::basic_json ( const basic_json &  other )

inline

Creates a copy of a given JSON value.

Parameters

[in]

other

the JSON value to copy

Complexity

Linear in the size of other.

Requirements

This function satisfies the Container requirements:

• The complexity is linear.
• As postcondition, it holds: other == basic_json(other).

Exceptions

std::bad_alloc

if allocation for object, array, or string fails.

Example

The following code shows an example for the copy constructor.

#include <json.hpp>

using namespace nlohmann;

int main()
{
    // create a JSON array
    json j1 = {"one", "two", 3, 4.5, false};

    // create a copy
    json j2(j1);

    // serialize the JSON array
    std::cout << j1 << " = " << j2 << '\n';
    std::cout << std::boolalpha << (j1 == j2) << '\n';
}

Output:

["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 

.