Hi, Saw your question on irc.
Attached is a modification on your `simple' language that demonstrates
transparent source locations.
The explicit, Bison-like locations work just like they do in Bison...eg
something like:
;; helper
(define (note-location ast loc)
(when (supports-source-properties? ast)
(set-source-property! ast 'loc loc))
ast)
(define (make-parser)
(lalr-parser
;; ...
;; production rules
(variable
(type Identifier = expression semicolon) : `(variable ,$2 ,$1
,(note-location `(expression ,$4) @3))
(Identifier dot Identifier Identifier = expression semicolon) : `(variable
,$4 (type ,$3 ,$1) ,(note-location `(expression ,$6) @5)))
Does that answer your question?
Greetings, Jan
simple.scm
Description: Binary data
spec.scm
Description: Binary data
-- Jan Nieuwenhuizen <jann...@gnu.org> | GNU LilyPond http://lilypond.org Freelance IT http://JoyofSource.com | Avatar® http://AvatarAcademy.nl
