[antlr-interest] "start of line" issue in lexer
Michiel Vermandel
Michiel_Vermandel at axi.be
Wed Jun 21 07:38:48 PDT 2006
Hi,
I need a lexer rule to skip comment in a part of code-text.
The rule should only be used if "rem" is at the start of the line or only
preceeded by whitespaces and/or tabs.
so given this part of code:
rem setting a to 5
set a=5;
rem setting lvrem to a
set lvrem = a;
the first and the third line should be concidered as comment.
the fourth line should be left alone.
building a rule for the case in line 3 is quite easy because I can search
for new line characters, but for the very first line that is not possible
since there are no preceeding new line characters.
how do I have to handle this?
Thanks a lott!
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