Bison & flex on start conditions

[Steve Murphy]

Hello--

Been playing with bison/flex for years; think they're great.

There are few interoperability issues between them, however.

One that would be nice to smooth out would be the start-condition
capability in flex... and how to trigger it from the bison grammar end
of things.

Bison can call a function in the flex world, that will run the 
 BEGIN(XXX) and set the start condition for flex. But usually, it's
already too late... bison has it's lookahead token. Flex already
evaluated the token under the old regime, and returned a token.

Has anybody got a solution how to trigger flex start conditions from
bison, so everything works out nice?

murf

-- 
Steve Murphy <address@hidden>
Electronic Tools Company