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Re: [Scheme-reports] Boolean hemlines
On Thu, Apr 12, 2012 at 12:09:16AM -0400, John Cowan wrote:
> Alan Watson scripsit:
> > A long time ago, some people made the decision that #t/#f were in
> > some sense better than #!true/#!false. More recently, the WG1 have
> > made a different decision that #true/#false are in some sense better
> > than #t/#f.
> The cases aren't really comparable. #!true and #!false were removed from
> the language; #t and #f aren't being removed.
> > This decision is not without cost. If an R7RS Scheme writes a boolean
> > datum as #true or #false, it likely cannot be read by a R4RS, R5RS,
> > or R6RS Scheme. It is unrealistic and probably undesirable to require
> > perfect compatibility between iterations of Scheme, but changing the
> > spelling a fundamental data is perhaps unexpected. The WG1 needs to
> > decide if this cost is acceptable, and if not either revert their
> > decision to allow #true/#false or require write to produce #t/#f.
> I think that's a quality of implementation issue. Currently Chibi is
> the only Scheme that accepts #true and #false, and it always prints
> #t and #f.
I think this #true and #false is a completely gratuitous change, and if
anyone has even the slightest problem with it, it should go. It has
almost zero benefit.
"The process of preparing programs for a digital computer
is especially attractive, not only because it can be economically
and scientifically rewarding, but also because it can be an aesthetic
experience much like composing poetry or music."
-- Donald Knuth
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