[antlr-interest] Problem to build AST (kind of reverse AST)

[Aurelien Thiriet]

Hi,

I'm new to ANTLR (I've read the books by the way ;)).


I'd like to parse and build AST for this kind of file :

"
package1 data11;
package1 data12;

package2 data21;
package2 data22;
"

Which means  data11 and data12 belongs to package1, data21 and data22
belongs to package2.


Its very easy to build this kind of AST :

(DOCUMENT (DATA ( PACKAGE(package1) data11) DATA ( PACKAGE(package1)
data12) DATA ( PACKAGE(package2) data21) DATA ( PACKAGE(package1) data22)))


But my point is to reverse it like this :
(DOCUMENT ( PACKAGE (package1 DATA(data11) DATA(data12)))    ( PACKAGE
(package2 DATA(data21) DATA(data22)))   )


How would you write the grammar to perform this AST ?

I've almost succed using many  java code into grammar file, but I'd like to
use grammar only if possible.


Thanks a lot

Aurélien