Logger Interface

Logger Interface

It is often useful to see the history of state transitions and state method calls. One option for that would be by putting log statements in every method, which can be tedious and error prone.

HFSM also provides the interface for attachable logger, for a more convenient solution, removing the need to clutter user state code with the custom logging code:

// enable logger functionality
#define HFSM_ENABLE_STRUCTURE_REPORT

#include <hfsm/machine_single.hpp>

namespace hfsm {
struct LoggerInterface {
	enum class Method {
		Substitute,
		Enter,
		Update,
		Transition,
		React,
		Leave,
	};
	virtual void record(const char* state, const Method method) = 0;
};
} // namespace hfsm

Example code walkthrough

Source code: debug logger interface example