racket/racket
Matthew Flatt 3fbb384604 add hash-keys-subset?
This function exposes the fast subset operation that is built in for
immutable hash tables (and used by the set-of-scopes implementation).

Also, make the space optimization implicit for `eq?`-based hash tables
that contain only #t values (instead of explicit and only available
internally). It turns out to be easy and efficient to make the
representation automatic, because the HAMT implementation can support
a mixture of nodes with some containing explicit values and some
containing implicit #t values.
2016-06-30 08:22:18 -06:00
..
collects Improve with-disappeared-uses and add record-disappeared-use 2016-06-29 12:50:14 -05:00
src add hash-keys-subset? 2016-06-30 08:22:18 -06:00
.gitignore internal hooks to build "Racket.exe" without "libracket3m.dll" 2015-03-28 09:50:01 -06:00