JSON for Modern C++  2.0.6

§ basic_json() [23/23]

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>
nlohmann::basic_json::basic_json ( basic_json &&  other)
inlinenoexcept

Move constructor. Constructs a JSON value with the contents of the given value other using move semantics. It "steals" the resources from other and leaves it as JSON null value.

Parameters
[in,out]othervalue to move to this object
Postcondition
other is a JSON null value
Complexity
Constant.
Example
The code below shows the move constructor explicitly called via std::move.
1 #include <json.hpp>
2 
3 using json = nlohmann::json;
4 
5 int main()
6 {
7  // create a JSON value
8  json a = 23;
9 
10  // move contents of a to b
11  json b(std::move(a));
12 
13  // serialize the JSON arrays
14  std::cout << a << '\n';
15  std::cout << b << '\n';
16 }
basic_json<> json
default JSON class
Definition: json.hpp:10155
Output (play with this example online):
null
23
The example code above can be translated with
g++ -std=c++11 -Isrc doc/examples/basic_json__moveconstructor.cpp -o basic_json__moveconstructor 
Since
version 1.0.0

Definition at line 2058 of file json.hpp.