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"Alan Watson" <a.watson@xxxxxxxxxxxxxxxx> writes: > Consider data types with 32 bits and 64 bits but which are not > numbers in the sense that the generic arithmetic operations cannot > be used with them without an explicit conversion. Appropriate type- > specific arithmetic and logical operations could be defined for > these types. This would not be especially difficult to implement in > a well-designed Scheme. Yes, and SRFI 77 gives you the machinery to implement that. (In fact, the reference implementation does precisely that for the fixnums.) But it's a whole different ballgame from the "unified" number system of SRFI 77 (in the sense that fixnums are exact integers and flonums are inexact reals). -- Cheers =8-} Mike Friede, Völkerverständigung und überhaupt blabla