[antlr-interest] AntLR grammar problems.

[Bharath S]

Hi grp,

My antlr grammar seems to behave strangely, offlate.
For example, I have a lexer rule:

IDENTIFIER: ('a'..'z');

I have a parser rule associated with it:
-------------------------------------
idList returns [String strs="zilch"]
{String s;}
: x: IDENTIFIER {strs = x.getText();}
;
-------------------------------------

When I run Main.java and type the character 'a' (when
i type it, i dont include the single quotes) and it
says:

"line 1:1: expecting IDENTIFIER, found 'a'".

This happened earlier but the mistake disappeared by
itself. Also, when i try delete the lexer so that i
would recreate the lexer instead of overwriting it, it
often says "OUT OF SYNC WITH THE SYSTEM".

Can anybody shed some light on this?

Bharath.

--- Terence Parr <parrt at cs.usfca.edu> wrote:
> Hi  I have a lab using JBurg to generate code in
> conjunction with 
> ANTLR.  Google jburg and check the lab out also at
> my USF course notes. 
> :)
> 
> Ter
> On Mar 11, 2004, at 8:13 AM, Bharath S wrote:
> 
> > Hi All,
> >
> > My understanding is that AntLR can be used to
> generate
> > the front-end of a compiler (lex-parser-AST). What
> > about the backend? (code
> generation/optimization?). As
> > of now, I am getting clear ideas about defining
> the
> > "structured text" language's syntax+semantics; How
> > would i convert it to bytecode?
> >
> > Thanks a lot.
> >
> > Bharath.
> >
> > =====
> > Bharath Sundararaman
> > Graduate Assistant, CAHS.
> > (312)-5606532 (M)
> > http://www.cs.uic.edu/~bsundara
> >
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> --
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