json/api/basic_json/operator%3D.md

nlohmann::basic_json::operator=

basic_json& operator=(basic_json other) noexcept (
    std::is_nothrow_move_constructible<value_t>::value &&
    std::is_nothrow_move_assignable<value_t>::value &&
    std::is_nothrow_move_constructible<json_value>::value &&
    std::is_nothrow_move_assignable<json_value>::value &&
    std::is_nothrow_move_assignable<json_base_class_t>::value
);

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

other (in)

value to copy from

Exception safety

Strong guarantee: if an exception is thrown while copying other, there are no changes to #!cpp *this.

Complexity

Linear.

Examples

??? 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.
 
```cpp
--8<-- "examples/basic_json__copyassignment.cpp"
```

Output:

```json
--8<-- "examples/basic_json__copyassignment.output"
```

See also

• basic_json create a JSON value
• swap exchanges the contents of two JSON values

Version history

• Added in version 1.0.0.