diff options
| -rw-r--r-- | transfer/examples/maybe.tr | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/transfer/examples/maybe.tr b/transfer/examples/maybe.tr new file mode 100644 index 000000000..02d7fe56d --- /dev/null +++ b/transfer/examples/maybe.tr @@ -0,0 +1,11 @@ +data Maybe : Type -> Type where + Nothing : (A : Type) -> Maybe A + Just : (A : Type) -> A -> Maybe A + +fromMaybe : (A : Type) -> A -> Maybe A -> A +fromMaybe _ x Nothing = x +fromMaybe _ _ (Just x) = x + +maybe : (A : Type) -> (B : Type) -> B -> (A -> B) -> Maybe A -> A +maybe _ _ x _ Nothing = x +maybe _ _ _ f (Just x) = f x
\ No newline at end of file |