function get_col_num(){
		if( ! isset($this->c) ){
			if( isset($this->children[0]) ){
				$this->c = $this->children[0]->get_col_num();
			}
			else {
				$this->c = 0;
			}
		}
		return $this->c;
	}
function get_col_num(){
		if( ! isset($this->c) ){
			if( isset($this->children[0]) ){
				$this->c = $this->children[0]->get_col_num();
			}
			else {
				$this->c = 0;
			}
		}
		return $this->c;
	}
function get_col_num ( ) { if ( ! isset ( $ this -> c ) ) { if ( isset ( $ this -> children [ 0 ] ) ) { $ this -> c = $ this -> children [ 0 ] -> get_col_num ( ) ; } else { $ this -> c = 0 ; } } return $ this -> c ; }
Get column number.
This will search recursively until a terminal node is reached.
@return int
Get column number . This will search recursively until a terminal node is reached .