public function compile() {
		foreach ($this->_params as $key => $value) {
			if (!strpos($key, ':')) {
				continue;
			}
			unset($this->_params[$key]);
			$this->_meta[$key] = $value;
		}

		$this->_match = $this->_params;

		if ($this->_template === '/' || $this->_template === '') {
			$this->_pattern = '@^/*$@';
			return;
		}
		$this->_pattern = "@^{$this->_template}\$@";
		$match = '@([/.])?\{:([^:}]+):?((?:[^{]+?(?:\{[0-9,]+\})?)*?)\}@S';

		if ($this->_config['unicode']) {
			$this->_pattern .= 'u';
		}
		preg_match_all($match, $this->_pattern, $m);

		if (!$tokens = $m[0]) {
			return;
		}
		$slashes = $m[1];
		$params = $m[2];
		$regexs = $m[3];
		unset($m);
		$this->_keys = [];

		foreach ($params as $i => $param) {
			$this->_keys[$param] = $param;
			$this->_pattern = $this->_regex($regexs[$i], $param, $tokens[$i], $slashes[$i]);
		}
		$this->_defaults += array_intersect_key($this->_params, $this->_keys);
		$this->_match = array_diff_key($this->_params, $this->_defaults);
	}