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add η for False and True

This commit is contained in:
rhiannon morris 2024-02-10 11:39:07 +01:00
parent 642ac25a71
commit 325e128063
1 changed files with 6 additions and 5 deletions
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11
lib/Quox/Equal.idr
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@ -259,15 +259,16 @@ namespace Term
compare0 defs ctx sg (sub1 snd (Ann s fst s.loc)) (E $ Snd e e.loc) t
SOne => clashT loc ctx ty s t
compare0' defs ctx sg ty@(Enum {}) s t = local_ Equal $
compare0' defs ctx sg ty@(Enum cases _) s t = local_ Equal $
-- η for empty & singleton enums
if length (SortedSet.toList cases) <= 1 then pure () else
case (s, t) of
-- --------------------
-- Γ ⊢ `t = `t ⇐ {ts}
-- Γ ⊢ 't = 't ⇐ {ts}
--
-- t ∈ ts is in the typechecker, not here, ofc
(Tag t1 {}, Tag t2 {}) =>
unless (t1 == t2) $ clashT s.loc ctx ty s t
(E e, E f) => ignore $ Elim.compare0 defs ctx sg e f
(Tag t1 {}, Tag t2 {}) => unless (t1 == t2) $ clashT s.loc ctx ty s t
(E e, E f) => ignore $ Elim.compare0 defs ctx sg e f
(Tag {}, E _) => clashT s.loc ctx ty s t
(E _, Tag {}) => clashT s.loc ctx ty s t