[racket-dev] Lists aren't sets, but have set-like operations

From: Matthias Felleisen (matthias at ccs.neu.edu)
Date: Thu Aug 22 14:47:44 EDT 2013

On Aug 22, 2013, at 2:31 PM, Carl Eastlund wrote:

> Here's what I propose to do now:
> - rename set? to generic-set?; this predicate recognizes the new all-inclusive generic set type
> - rename set-immutable? to set?; this predicate recognizes the pre-existing immutable hash set type
> - leave set-mutable? and set-weak? alone; they recognize the other two hash set types (on the mutability axis)
> - allow multiple-set operations to combine equal-based hash sets and lists, since both use equal? for equality

Sounds like the right direction to me. -- Matthias

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