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>
Copy assignment operator. Copies a JSON value via the "copy and swap" strategy: It is expressed in terms of the copy constructor, destructor, and the swap() member function.
- Parameters
-
[in] | other | value to copy from |
- Complexity
- Linear.
- Requirements
- This function satisfies the Container requirements:
- The complexity is linear.
- Example
- The code below shows and example for the copy assignment. It creates a copy of value
a
which is then swapped with b
. Finally, the copy of a
(which is the null value after the swap) is destroyed.
15 std::cout << a <<
'\n';
16 std::cout << b <<
'\n';
a class to store JSON values
Definition: json.hpp:130
namespace for Niels Lohmann
Definition: json.hpp:55
Output (play with this example online): 23
23
The example code above can be translated withg++ -std=c++11 -Isrc doc/examples/basic_json__copyassignment.cpp -o basic_json__copyassignment