[plt-scheme] define-struct: Where?

Hi all,

Just curious about the definition of define-struct. Where is it? Is it
defined in C? or in Scheme? I searched the source for 'define-syntax
define-struct' and could only find compat.ss define-structure.

Which by the way raises a question (on line 91 and others):
(+ "struct:" name)...

Are you using + for string append? or it is my impression?

However, I can't find a redefinition of + for strings and mzscheme
doesn't support that on-the-fly. How are you doing that?


Cheers,
-- 
Paulo Jorge Matos - pocm at sat inesc-id pt
Web: http://sat.inesc-id.pt/~pocm
Computer and Software Engineering
INESC-ID - SAT Group