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| author | Greg Brown <greg.brown01@ed.ac.uk> | 2024-09-11 13:59:17 +0100 |
|---|---|---|
| committer | Greg Brown <greg.brown01@ed.ac.uk> | 2024-09-11 13:59:17 +0100 |
| commit | a9230817da88305b16d658a056e72bef159b8f94 (patch) | |
| tree | e1b2560063c285b64efcfc1b31d292062b394e87 /src/Data/Maybe/Decidable.idr | |
| parent | 567e5b489525b43a19d0fe8c4f1f84abf7c56167 (diff) | |
Define terms.
Diffstat (limited to 'src/Data/Maybe/Decidable.idr')
| -rw-r--r-- | src/Data/Maybe/Decidable.idr | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/Data/Maybe/Decidable.idr b/src/Data/Maybe/Decidable.idr new file mode 100644 index 0000000..e301ab1 --- /dev/null +++ b/src/Data/Maybe/Decidable.idr @@ -0,0 +1,6 @@ +module Data.Maybe.Decidable + +public export +data OnlyWhen : (p : a -> Type) -> Maybe a -> Type where + RJust : forall x. (px : p x) -> p `OnlyWhen` Just x + RNothing : (false : (x : a) -> Not (p x)) -> p `OnlyWhen` Nothing |