Printing out the tree

[David Mohr]

Hi,
maybe I'm just overlooking something, but it would be very nice to be able to print out the tree that we're manipulating.

Right now I just use a TreeWalker, and print out each element, but that's without indention. So it's hard to see where the element belongs to. Is there maybe a method for this somewhere that I'm overlooking? Or else, can I get a pointer how to implement it myself?

Thanks,
~David

[David Mohr]

Hey, sorry for the late reply, but thanks, that works out nicely!

[Tobias Gutzmann]

Hej,

you can either call toSource() on any source element, but that won't give you a tree but a real source code representation. If you want the tree, this source code snippet could help (I write it down from my memories, don't be too picky on exact syntax/function names ;-)

class TreePrinter {
private void printIndent() {
for (int i = 0; i < indent; i++) System.out.print(" "); // imperformant solution!!!!
}

private int indent = 0;
public void dfsPrint(ProgramElement node) {
printIndent();
System.out.println(node);
if (node instanceof NonTerminalProgramElement) {
++indent;

    int count = ((NonTerminalProgramElement)node).getChildCount();
    for (int i=0;i<count;i++) {
    ProgramElement child = ((NonTerminalProgramElement)node)node.getChild(i);
    dfsPrint(child);
    }
        --indent;     
    }

}