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Diffstat (limited to 'doc/protocol/comment_3_e2d91431651d3ffe9072bd110b2fdc1d._comment')
| -rw-r--r-- | doc/protocol/comment_3_e2d91431651d3ffe9072bd110b2fdc1d._comment | 19 |
1 files changed, 0 insertions, 19 deletions
diff --git a/doc/protocol/comment_3_e2d91431651d3ffe9072bd110b2fdc1d._comment b/doc/protocol/comment_3_e2d91431651d3ffe9072bd110b2fdc1d._comment deleted file mode 100644 index 1318d16..0000000 --- a/doc/protocol/comment_3_e2d91431651d3ffe9072bd110b2fdc1d._comment +++ /dev/null @@ -1,19 +0,0 @@ -[[!comment format=mdwn - username="https://www.joachim-breitner.de/" - nickname="nomeata" - avatar="http://cdn.libravatar.org/avatar/a2112893817513537c6a2c228c04c138a2f68bba57121ab7f267de58fc5171d7" - subject="comment 3" - date="2017-05-07T03:19:14Z" - content=""" -Still not good, I think, as the instance `Hashable Hash` has `hash = id`, so -``` -hash Nothing = hash () = id (hash ()) = hash (Just (hash ()) -``` -and we have a collision at type `Maybe Hash`. - -What would work is to do the same that `Hashable []` does, i.e. has the hash again: -``` - hash (Just v) = hash (val (hashValue v)) - hash Nothing = hash (mempty :: B.ByteString) -``` -"""]] |