Comment operator

Is it BBCODE?
It does not follow BBCODE's naming convention, yet BBCODE is required to multiquote.

Also, [o] is the only tag subject
to operator overloading.

BBcode would be better if it got rid of bracket notation, and ending tags. There's no need for it at all. If you're providing an HTML abstraction, actually abstract it.

/b/bold/b/: bold
/i/italic/i/: italic
/c/code/c/: code

/sup/superscript/sup*/superscript/sup*/superscript/sup/: [sub]superscript[sup]superscript[sup]superscript[/sub][/sub][/sub]

it would be a lot more difficult to bbcode fail that way. in fact, i might write a parser for this.