[antlr-interest] languages without reserved words
Michael Brade
brade at informatik.uni-muenchen.de
Thu Mar 2 02:49:41 PST 2006
Hi all,
is there a standard way or a best practice to implement grammars for languages
that allow identifiers to be anything, including the keywords of the language
itself?
Example: I have a language that has the keyword "position", and that allows to
create tags like
NCNAME (...) { .... }
with NCNAME being all letters and '_'.
Or think of C/C++ allowing to declare a variable "int struct = 0;".
The problem is that as soon as I use literals in the parser they are passed on
to the lexer. If I disable testLiterals all keywords stay NCNAMEs, if I
enable testLiterals all NCNAMES with text "position" are turned into the
position-literal.
I don't want to use actions to test the NCNAME in the parser. What other
possibilities are there?
Thanks,
--
Michael Brade; KDE Developer, Student of Computer Science
|-mail: echo brade !#|tr -d "c oh"|s\e\d 's/e/\@/2;s/$/.org/;s/bra/k/2'
°--web: http://www.kde.org/people/michaelb.html
KDE 4: Beyond Your Expectations
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://www.antlr.org/pipermail/antlr-interest/attachments/20060302/863684a2/attachment.bin
More information about the antlr-interest
mailing list