def matches(self, verbosity=Verbosity.TERSE):
        """Shows partial matches and activations.

        Returns a tuple containing the combined sum of the matches
        for each pattern, the combined sum of partial matches
        and the number of activations.

        The verbosity parameter controls how much to output:

          * Verbosity.VERBOSE: detailed matches are printed to stdout
          * Verbosity.SUCCINT: a brief description is printed to stdout
          * Verbosity.TERSE: (default) nothing is printed to stdout

        """
        data = clips.data.DataObject(self._env)

        lib.EnvMatches(self._env, self._rule, verbosity, data.byref)

        return tuple(data.value)