[antlr-interest] Does ANTLR TreeParsing [still] have these "flaws"?
Terence Parr
parrt at jguru.com
Tue Jan 21 10:49:01 PST 2003
On Tuesday, January 21, 2003, at 09:31 AM, micheal_jor
<open.zone at virgin.net> wrote:
> Hi,
>
> I came across this piece on flaws with ANTLR TreeParsers on my
> travels and wondered if anyone had an opinion.
>
> http://www.cc.gatech.edu/classes/AY2000/cs4240_fall/ANTLR_Patch/
The problems are:
1 Token information is not retained, so you can't keep track of
which line number of the original source code a token came from,
which makes it impossible to give good typechecker error messages
This was just discussed on the list I think....can't do it yet. I want
to investigate more.
2 ANTLR's default rules for TreeParsers will "shave off" any
decorations you add to the tree
I'm not sure what he's getting at here...i think he means that trees
weren't dup'd properly. That is fixed.
Ter :)
--
Co-founder, http://www.jguru.com
Creator, ANTLR Parser Generator: http://www.antlr.org
Lecturer in Comp. Sci., University of San Francisco
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