[antlr-interest] Newbie Rule Rewrite
xkrebstarx
xkrebstarx at gmail.com
Tue Apr 17 12:37:00 PDT 2007
>What do you want thhe output to look like?
I am using ANTLR v3 and I would like the rule to look like this...
rule ( identifier | b | c | d ) ( '[' subscript ']' | f | g )*
;
and the input tokens a[i][j] would give me something like
sub
sub
a
i
j
The tough part is figuring out how the first set ( a,b,c,d ) and the
second set ( e,f,g ) would be represented in the rewrite. That sounds
a big vague, let me try to explain a little more.
If I do something this
rule ( a | b | c | d )
( e -> ^('sub' a e)
| f -> rewrite
| g -> rewrite
}*
how do I know what a,b,c or d was used. I get an error.
Or conversely, if I use
rule ( a | b | c | d ) ( e | f | g )* -> rewrite
how do I know what e,f,g, if any, were used. I have read the
Definitive reference over and over and cannot figure out how to put
this together properly.
Thanx
>>On Mon, Apr 16, 2007 at 11:11:39PM -0400, xkrebstarx wrote:
>> I am stuck on how to rewrite a rule like this. Can anyone help
>>
>> rule ( a | b | c | d ) ( e | f | g }*
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