[antlr-interest] Lexer grammar in AntlrWorks 1.4.3

[Daniela da Cruz]

Thanks Stefan for your reply. I understand what you mean :)

It will help me for sure.

thanks
daniela

On Fri, Mar 2, 2012 at 12:03, Stefan Mätje <
Stefan.Maetje at esd-electronics.com> wrote:

> Hi Daniela,
>
> I should not respond to emails on the list after a long workday %-)
>
> I've overseen that you talked about running/debugging the lexer grammer
> with
> AntlrWorks. If I try to debug I get the same erroneous output as you get.
> Sorry.
>
> To get the grammar through AntlrWorks you may change the grammar as
> follows:
> ------------------------------------------------------------------
> /*lexer */grammar testRE;
>
> tokens: .+;
>
> ID  :   ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'0'..'9'|'_')*
>    ;
> WS      :       (' ' | '\t' | '\n' | '\r' )+
>        ;
> -------------------------------------------------------------------
>
> Then you can debug it and feed it some input. But you will only be able to
> see
> the token stream. AntlrWorks doesn't let you see how the lexer walks
> through
> the input text.
>
> Regards,
>        Stefan
>
> Am 01.03.2012 20:13:43 schrieb(en) Daniela da Cruz:
> > Hi Stefan,
> >
> > I have named the file that contains the lexer grammar as testRE.g.
> Exactly
> > as I do with combined grammars.
> > Are you able to run the file attached with success in AntlrWorks?
> >
> > thanks
> > daniela
> >
> > On Thu, Mar 1, 2012 at 18:47, Stefan Mätje <
> > Stefan.Maetje at esd-electronics.com> wrote:
> >
> > > Hi,
> > >
> > > it seems to me that you have either the lexer grammar not named
> properly
> > or
> > > perhaps not saved with the same name as it is given in your lexer
> grammar
> > > ("testRE") below.
> > >
> > > AntlrWorks runs the compiler himself but has given the compiler the
> name
> > > "null.java". The name string internal of AntlrWorks seemed to be a null
> > > reference -> null+".java". I would have expected "testRE.java".
> > >
> > > Same accounts for the error message of the compiler for __Test__.java.
> Id
> > > was
> > > missing because of empty lexer name ...
> > >
> > >
> > > Am 01.03.2012 16:08:59 schrieb(en) Daniela da Cruz:
> > > > Hi.
> > > >
> > > > I have been creating a very simple lexer in AntlrWorks but when
> trying
> > to
> > > > run it I got the following errors:
> > > >
> > > > [15:01:29] javac: file not found:
> > > > C:\Users\Utilizador\Desktop\output\null.java
> > >
> > > Bad file name from null reference?   ^^^^
> > >
> > > > [15:01:29] Usage: javac <options> <source files>
> > > > [15:01:29] use -help for a list of possible options
> > > > [15:01:31] C:\Users\Utilizador\Desktop\output\__Test__.java:12:
> > > > <identifier> expected
> > > > [15:01:31]  g = new (tokens, 49100, null);
> > > > [15:01:31]         ^
> > >
> > > Missing lexer class  ^^^^ name.
> > >
> > > > [15:01:31] 1 error
> > > >
> > > > It seems that is looking for the parser file that usually exists on a
> > > > combined grammar.
> > > > Was anyone able to run a lexer grammar in AntlrWorks?
> > > >
> > > > My lexer was something like:
> > > >
> > > > ---------------------------------------------------
> > > > lexer grammar testRE;
> > > >
> > > > ID: '0'..'9'+ ;
> > > > ---------------------------------------------------
> > >
> > > This worked for me in AntlrWorks 1.4.3
> > >
> > > Regards,
> > >        Stefan
> > >
> > >
> > >
> >
>
>
>