Finite state machine (FSM) in Golang

Gof version

following the GoF State pattern: https://en.wikipedia.org/wiki/State_pattern

Hand-made FSM

Based on triggers and rules (a rule is map whose key is a State and values are an array of pairs of Trigger and State)

Switch-Based FSM

Based on Go switch statement

Complex FSM

This version allows the execution of events with a context (ie a struct containing some data to pass to the next State)