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Re: Opacity considered harmful

This page is part of the web mail archives of SRFI 76 from before July 7th, 2015. The new archives for SRFI 76 contain all messages, not just those from before July 7th, 2015.

Taylor Campbell wrote:
I too agree with the pragmatic problems with the opacity that have
been presented.  Although I do think that there can be good reasons
for needing security, the oversimplified opacity flag is no actual
provision for security.

Security is not the motivation for opacity.  Maintainability is the
main motivation: If I don't expose the internals of my data structures
to client programs, then I have a better chance of modifying those
internals in a future version of my library without breaking those
	--Per Bothner
per@xxxxxxxxxxx   http://per.bothner.com/