[antlr-interest] How does AST construction work?

[Martin Probst]

Hi,

> I tried this, and the returned tree just contains '2':

maybe your just running into ANTLRs sibling pointered trees?

Try this code to print your tree:

void printTree(AST ast) {
  System.out.println(ast);
  if (ast.getFirstChild() != null)
    printTree(ast.getFirstChild());
  if (ast.getNextSibling() != null)
    printTree(ast.getNextSibling());
}

The AST tree is sibling pointered, e.g. if you have a simpe list like 
( 1 2 3 4 )
you have to follow the getNextSibling() link from the node that contains
"1".

Sorry if this was too obvious, but that would at least make an
explanation...

Regards,
Martin