Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> I'm seeking more powerful "any" pseudotypes.
If you don't want any constraints at all on the argument types, you
can use "any" (with the quotes, because it's a reserved word :-().
If you want some constraints but not "anyelement", please be more
specific about what you want.
regards, tom lane