Currently can't support something like this:

State1
enter / count += 1 # it's time to increment

The ' causes a parsing failure:

Failed parsing node label.
Reason(s): no viable alternative at input ' it'' at line 2 column 23. Offending symbol: `'`.
           mismatched input ''' expecting <EOF> at line 2 column 23. Offending symbol: `'`.
DiagramNode:
    id: State1
    label: `State1
            enter / count += 1 # it's time to increment
            exit  /`
    parent.id: MySm (parent follows below)

Supporting inline comments will be difficult for various programming languages as they can differ dramatically. Like ocaml (* this is also an enclosed comment *), pascal `(: this is an enclosed comment :). See here.

Might need to standardize on a single style for StateSmith like /* */. This works right now for parsing, but it isn't translated to the user's desired language right now. User's can post process generated file in the mean time.