[r6rs-discuss] [Formal] SRFI-39 should be made an R6RS library

[Michael Sperber]

"R. Kent Dybvig" <dyb at cs.indiana.edu> writes:

> This destroys one of the nice, simple properties of parameters, which is
> that they are simply procedures and can be created by any means, not just
> via make-parameter.  This means that the encapsulated location can be just
> about anything---a memory-mapped device address, a file, a screen image,
> an environment variable, etc.

This suggests to me that parameters, as intended by you, are an even
more general mechanism than dynamic binding and thread-local
assignment.  As Scheme generally tries to avoid piling feature upon
feature, it's a better strategy to offer the building blocks and let
people build the parameter mechanism they want from them.

-- 
Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla