nlohmann::basic_json::json_base_class_t

using json_base_class_t = detail::json_base_class<CustomBaseClass>;

The base class used to inject custom functionality into each instance of basic_json. Examples of such functionality might be metadata, additional member functions (e.g., visitors), or other application-specific code.

Template parameters

CustomBaseClass: the base class to be added to basic_json

Notes

Default type

The default value for CustomBaseClass is void. In this case, an empty base class is used and no additional functionality is injected.

Limitations

The type CustomBaseClass has to be a default-constructible class. basic_json only supports copy/move construction/assignment if CustomBaseClass does so as well.

Examples

??? example

The following code shows how to inject custom data and methods for each node.
 
```cpp
--8<-- "examples/json_base_class_t.cpp"
```

Output:

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

Version history

Added in version 3.12.0.

1.1 KiB Raw Blame History