Hi,

At Wed, 8 Jun 2011 16:44:55 +0900,
Charles Oliver Nutter wrote in [ruby-core:36833]:
> I might be more inclined to a keyword or pseudo constant along the
> lines of __FILE__, like __MAIN__ that produces true iff __FILE__ ==
> $0. Something we can statically determine before runtime without
> digging around in the caller's frame.

__FILE__.main?

-- 
Nobu Nakada