Re: yy_current_state, stuff

[Vern Paxson]

> I want to be able to
> interrupt the scanner in the middle of scanning and be able to resume
> without problems.  Such as this:  the scanner has read the letters 'i' and
> then 'n' while in the INITIAL start condition, and then is interrupted,
> when it comes back to the scanner, in order for it to know that the 't'
> char it reads next makes it complete the rule for <INITIAL>"int" it needs
> to have the yy_current_state variable (declared in the yylex func) restored
> (in addition to the start condition vars, etc.)

This will be very hard to do.  First, what does it mean to interrupt the
scanner?  Like via a signal?  There's no hook to abort scanning mid-token;
the scanner is sitting in a tight loop at that point.

                Vern