package hashcons

1.4.0

• fixed performance bugs in weak hash tables implementation, by back porting some old fixes from OCaml's Weak module (reported by Edwin Török)
• improved equality functions in Hset and Hmap (contributed by Dorian Lesbre)
• a lot of missing functions in Hset and Hmap wrt OCaml's Set and Map, with the notable exception of to_seq_rev (contributed by Dorian Lesbre)

1.3

• modules Hset and Hmap moved into module Hashcons, to avoid the clash with a module Hmap from another project (patch from Qi LI)

1.2

• fixed bug in Hset (reported by Jan Midtgaard)

1.1

• do not assume anymore that the hash function returns a nonnegative value

1.0, 09/09/2013

• code moved to github