[antlr-interest] A little trouble with single line comments and EOFs
Eric Merritt
cyberlync at gmail.com
Tue Mar 15 15:22:40 PST 2005
I am having a bit of trouble with a single line comment rule that
looks like the rule below. The problem comes in when a single line
comment is at the very end of a file and isn't followed by a newline.
The problem occurs becuase the lexer expects that new line.
COMMENT
: ( '#' ) ( ~'\n' )* '\n'
{
newline();
_ttype = Token.SKIP;
}
;
The obvious fix to this is something like
COMMENT
: ( '#' ) ( ~'\n' )* ( '\n' | EOF_CHAR)
{
newline();
_ttype = Token.SKIP;
}
;
However, there isn't any EOF or EOF_CHAR defined in the lexer. Can
anyone offer a solution to this problem?
Thanks,
Eric
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