[antlr-interest] Custom AST node type - guidance needed

[Bill Andersen]

Hi folks

Having some trouble making ASTs using a custom node type.  Before I ask any stupid questions, what is the best place to look on how to do this ( I'm using 3.2 )?  I'm finding bits and pieces, some of them contradictory.  For example I find this example

static class V extends CommonTree {
  public int x,y,z;
  public V(int ttype, int x, int y, int z) {
    this.x=x; this.y=y; this.z=z; token=new CommonToken(ttype,"");
  }
at http://www.antlr.org/wiki/display/ANTLR3/Tree+construction

When I try to define a constructor like this I'm forced to put a cast between on CommonToken to Token, which causes a runtime can't cast error.

What I want is really quite simple.  Need to add one extra field to my AST nodes to carry DSL type information.

Any help appreciated.  Thanks.

	.bill

Bill Andersen 
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