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.
CustomBaseClass : the base class to be added to basic_json
The default value for CustomBaseClass is void. In this case, an empty base class is used and no additional functionality is injected.
The type CustomBaseClass has to be a default-constructible class. basic_json only supports copy/move construction/assignment if CustomBaseClass does so as well.
??? 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" ```