exported Maybe

src/pwo/__init__.py

@@ -1,9 +1,11 @@
 from .private import format_filesize, async_retry, retry, async_test, ExceptionHandlerOutcome
+from .maybe import Maybe
 
 __all__ = [
     'format_filesize',
     'async_retry',
     'retry',
     'async_test',
-    'ExceptionHandlerOutcome'
+    'ExceptionHandlerOutcome',
+    'Maybe'
 ]

src/pwo/maybe.py

@@ -52,6 +52,8 @@ class Maybe(Generic[T]):
     def flat_map(self, transformer: Callable[[T], Maybe[U]]) -> Maybe[U]:
         return transformer(self.value) if self.is_present else Maybe.empty()
 
+    def __or__(self, alt: Maybe[T]) -> Maybe[T]:
+        return self if self.is_present else alt
     def or_else(self, alt: T) -> T:
         return self.value if self.is_present else alt