protected function current_token(){
		if( !isset($this->tok) ){
			$this->tok = current( $this->input );
			$this->t = self::token_to_symbol( $this->tok );
		} 
		return $this->tok;
	}
protected function current_token(){
		if( !isset($this->tok) ){
			$this->tok = current( $this->input );
			$this->t = self::token_to_symbol( $this->tok );
		} 
		return $this->tok;
	}
protected function current_token ( ) { if ( ! isset ( $ this -> tok ) ) { $ this -> tok = current ( $ this -> input ) ; $ this -> t = self :: token_to_symbol ( $ this -> tok ) ; } return $ this -> tok ; }
Get current token from input stream.
@return Mixed
Get current token from input stream .