[antlr-interest] 3.1b1 (??) 2008-04-09.18 issues

[Gavin Lambert]

At 06:46 1/06/2008, Sam Ellis wrote:
 >I didn't see a reply to your email, but I'm seeing the same
 >exception when switching from antlr 3.0.1 to 3.1b1 (May 20,
 >2008). I tracked this down to my lexer rules containing the
 >'!' operator for example:
 >
 >QUOTED_STRING
 >        :   (DQUOTE! (DSTRING_LETTER | STRING_NL)* DQUOTE!

Yeah, ANTLR v3 has never supported ! at the lexer level (it's now 
purely a tree construction operator only).

Sadly ANTLR's own syntax checking is a little vague-to-nonexistent 
at present, so you just have to "know" some of these little quirks 
:)