Lex and initial start conditions

[$Diwakar_Nag]

/ hpmtlx:comp.lang.c / eifrig at crabcake.cs.jhu.edu (Jonathan Eifrig) /  6:42 pm  May 24, 1990 /

> 	I have a not-so-basic question about Lex and its input specific-
>ations.  I want to write a simple parser, and in particular want to sup-
>port nested comments.  The basic idea to use Lex's start conditions:
>		....
>		....
>					Jack Eifrig
>					(eifrig at cs.jhu.edu)

	Just use BEGIN <state_name> eg . BEGIN COMMENT. Since BEGIN is a macro,
and it refers to some global variables defined by lex, it is a good idea to 
define a function like InitScanner() which just calls BEGIN macro in the lex
specs. file. InitScanner() can be used in a different file without worrying
about global vars. used by BEGIN.


-diwakar