On Feb 25, 2007, at 12:00 PM, Will Clinger wrote:

Requiring compiler writers to write
this extra code, instead of allowing them to reject
programs that violate the basic requirements of the
language, is a silly waste of implementors' time.

I consider it a silly waste of time for (hopefully) many more Scheme programmers than compiler writers to having to guess why a program was rejected by a compiler that is supposedly R6RS conforming. If the rules are spelled out in one place and in an explicit manner, a compiler (writer) can refer programmers there and the programmer can work around the restrictions.

I do like your classification scheme for R6R Scheme.

-- Matthias


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