lean4-htt

max/lean4-htt

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Author	SHA1	Message	Date
Kim Morrison	16bd7ea455	chore: deprecate List.iota (#6708 ) This PR deprecates `List.iota`, which we make no essential use of. `iota n` can be replaced with `(range' 1 n).reverse`. The verification lemmas for `range'` already have better coverage than those for `iota`. Any downstream projects using it (I am not aware of any) are encouraged to adopt it.	2025-01-21 02:32:35 +00:00
Yuri de Wit	c98b3a5388	fix: add local Hashable instance (fixes #1737 ) When inductives are indirectly mutually recursive, say `inductive T \| t (args: List T)` instead of `inductive T \| t (arg : T)`, Lean would fail to find an instance of Hashable for `T` because it was not yet defined. This commit makes sure that the deriving handler adds a needed Hashable T instance to the local scope so that Hashable.hash can be resolved recursively.	2022-10-23 21:26:04 +02:00

Author

SHA1

Message

Date

Kim Morrison

16bd7ea455

chore: deprecate List.iota (#6708 )

This PR deprecates `List.iota`, which we make no essential use of. `iota
n` can be replaced with `(range' 1 n).reverse`. The verification lemmas
for `range'` already have better coverage than those for `iota`.
Any downstream projects using it (I am not aware of any) are encouraged
to adopt it.

2025-01-21 02:32:35 +00:00

Yuri de Wit

c98b3a5388

fix: add local Hashable instance (fixes #1737 )

When inductives are indirectly mutually recursive, say `inductive T | t
(args: List T)` instead of `inductive T | t (arg : T)`, Lean would fail
to find an instance of Hashable for `T` because it was not yet defined.

This commit makes sure that the deriving handler adds a needed Hashable T
instance to the local scope so that Hashable.hash can be resolved
recursively.

2022-10-23 21:26:04 +02:00

2 commits