ParsingUtils.java 文件源码

public static void _getAllLeaves(Tree t, List<? super Tree> leaves,
                            final int startIndex,
                            final int stopIndex)
{
    int n = t.getChildCount();
    if ( n==0 ) { // must be leaf
        Token tok = ((TerminalNode)t).getSymbol();
        int i = tok.getTokenIndex();
        if ( i>=startIndex && i<=stopIndex && tok.getType() != Token.INVALID_TYPE ) {
            leaves.add(t);
        }
        return;
    }
    for (int i = 0 ; i < n ; i++){
        _getAllLeaves(t.getChild(i), leaves, startIndex, stopIndex);
    }
}