{
    (?P<comment>        \[\[\]\]
                          (?P<text>  .+?)
                        ( \[\[\]\] | $ )                      ) |
    (?P<comment2>       \[\]\[\]
                          (?P<text2> .+?)
                        ( \[\]\[\] | $ )                      ) |

    (?P<inline>
        (?P<style>
            (?P<strong> \*\*
                        (?P<strong_text> ( (?P>style) | . )+? )
                        \*\*                                  ) |
            (?P<em>     \*
                        (?P<em_text>     ( (?P>style) | . )+? )
                        \*                                    ) |
        )                                                       |

        (?P<topic>      \[\[     (?P<topic_text>   .+?) \]\]  )
        (?P<anchor>     \[       (?P<anchor_text>  .+?) \]
                        \(       (?P<ahcnor_href>  .+?) \)    ) |
        (?P<topic_a>    \[       (?P<topic_a_text> .+?) \]
                        \[       (?P<topic_a_href> .+?) \]    )
    )
}xsu