# regex for use with boost regex engine (e.g. Notepad++)
# To convert this pseudo-free-spaced text file to a "Find what" and "Replace with" usable in Notepad++, replace the following with nothing using Notepad++:
# \t|\R(?!\R)| +#.*|^#.*\R
    (?:
        ^system(?'is_system')
    |
        \G(?'first_of_this_type'\R)?\t
        (?:
            link(?'is_link')
        |
            \t*object(?'is_object')
        )
    )
     (?|"(?'name'[^"]*)"|(?'name'.*))
    (?('is_system')\R\tpos (?'xpos'\S+) (?'ypos'\S+))
    (?:
        (?:\k'is_system'|\k'is_link')
        (?=
            (?:
                \R?^\t
                (?:
                    link (?'link_follows')
                |
                ).*
            )*
        )
    )?
    (?'is_link_or_object'
        \k'is_link'(?:\R(?=\tlink )|(?'is_last_link'))     # advance to next link in such a way that we'll know when we reach it that it's not the first one
    |
        \k'is_object'(?:                                   # advance to next object in such a way that we'll know when we reach it that it's not the first one
            (?:\R\t.*)*?
            \R(?=\t+object )
        )?
    )?
|
    ^\S.*                                                  # comment, or top-level thing that's not a system
    (?:\R\t.*)*
|
    \G\R\t.*
|
    ^\R

(?{is_link_or_object}(?{first_of_this_type}:,))            # comma between link/object names
$+{name}
(?{is_system}
    \t$+{xpos}\t$+{ypos}
    \t                                                     # tab before links
    (?{link_follows}:\t)                                   # tab before objects, in case of no links
)
(?{is_last_link}\t)                                        # tab before objects, after last link