Multi-Dimensional Analog Literals

http://www.xs4all.nl/~weegen/eelis/analogliterals.xhtml

 assert( top( o-------o
               |L       \
               | L       \
               |  o-------o
               |  !       !
               !  !       !
               o  |       !
                L |       !
                 L|       !
                  o-------o ) == ( o-------o
                                   |       !
                                   !       !
                                   o-------o ) );

Моск выет.