[antlr-interest] Re: 2.7.2a4 ANTLR/C# - build ok, panic shutdown
slightlynew
gackle at shaw.ca
Thu Dec 5 18:01:03 PST 2002
Ter,
> I updated this java/action.g rule [...]
> To allow the 3rd arg. Hmm....
Oh no, that's definitely there. Let me try to express this more
clearly. I tried two separate things, one with Java Antlr and one
with C#. Neither worked.
(1) For C#, I ported your changes to java/action.g to
csharp/action.g. In other words, I added your new AST_CONSTRUCTOR
rule to the C# version. This didn't work, but I didn't really expect
it to, because Micheal had already implied it wouldn't until the
2.7.2a6 C# codegen comes out. And he has since confirmed that.
(2) For Java, I didn't have to change action.g at all, because you'd
already done so. I was just trying to use it. I modified a grammar
to pass a third argument to an AST constructor, and then tried to run
java Antlr on it. It didn't work. In fact, I got the same syntax
error as with the C#: "unexpected ','". This was why I asked, "Is
there something else one needs to do, to get Antlr to use the new
action.g?" The answer is "yes" in the C# case because 2.7.2a6 isn't
out yet. But what about the Java case?
Maybe there are some crossed wires and I wasn't really using the Java
2.7.2a6 codegen... but I definitely changed my grammar to
say "Language = Java" instead of C#.
- Daniel
--- In antlr-interest at y..., Terence Parr <parrt at j...> wrote:
>
> On Wednesday, December 4, 2002, at 03:08 PM, slightlynew wrote:
> > What I wasn't able to get working in Antlr 2.7.2a6 was that third
> > parameter that Terence added to the AST constructor syntax: #
> > [FOO, "Foo", "FooNode"] (or something like that!) I couldn't get
> > that to work either with Java or C# (having ported Terence's
changes
> > to the C# action.g). Antlr rejects the third parameter with a
syntax
> > error saying "unexpected ','". Is there something else one needs
to
> > do, to get Antlr to use the new action.g?
>
> Hmm...the latest version should have that. I could have sworn I
tested
> that. I updated this java/action.g rule:
>
> protected
> AST_CONSTRUCTOR!
> : '[' (WS)? x:AST_CTOR_ELEMENT (WS)?
> (',' (WS)? y:AST_CTOR_ELEMENT (WS)? )?
> (',' (WS)? z:AST_CTOR_ELEMENT (WS)? )? ']'
> {
> String args = x.getText();
> if ( y!=null ) {
> args += ","+y.getText();
> }
> if ( z!=null ) {
> args += ","+z.getText();
> }
> $setText(generator.getASTCreateString(null,args));
> }
> ;
>
> To allow the 3rd arg. Hmm....
>
> 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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