[antlr-interest] #( root children ) syntax change proposal?
Terence Parr
parrt at cs.usfca.edu
Tue Nov 18 11:21:04 PST 2003
Howdy folks,
The #(...) notation derives from wanting to use parens like LISP but
not wanting the ambiguity with (... | ...) alternative subrules. The #
was the only character left in ASCII for me to use ;) I have always
not liked it, but now it's ingrained. That said, I've been thinking of
changing it for ANTLR 3 into
^(root c1 ... cn)
in tree parsers and tree construction actions. There MAY be some
ambiguity with the ^ suffix operator, but I think we might wanna try it
out.
Anybody have any thoughts? I like it as it's more intuitive that that
is a tree ;) # is random.
Ter
--
Professor Comp. Sci., University of San Francisco
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