Allow positional pattern matching via __match_args__

README.md

@@ -101,12 +101,18 @@ For those running Python 3.10, you can make use of Python's **structural pattern
 
 ```
 >>> from resultify import Ok, Err
->>> ok = Ok('ok!')
+>>> ok = Ok("ok!")
 >>> match ok:
-...     case Ok(_value=foo): print(f"Yay {foo}")
-...     case Err(_value=foo): print(f"Nay {foo}")
+...     case Ok(foo): print(f"Yay {foo}")
+...     case Err(foo): print(f"Nay {foo}")
 ...
 Yay ok!
+>>> no = Err("nope!")
+>>> match no:
+...     case Ok(foo): print(f"Yay {foo}")
+...     case Err(foo): print(f"Nay {foo}")
+...
+Nay nope!
 ```
 
 

resultify/__init__.py

@@ -11,6 +11,8 @@ class Ok(Generic[T]):
     A value that indicates success and which stores arbitrary data for the return value.
     """
 
+    __match_args__ = ("_value",)
+
     def __init__(self, value: T = True) -> None:
         self._value = value
 
@@ -50,6 +52,8 @@ class Err(Generic[E]):
     A value that signifies failure and which stores arbitrary data for the error.
     """
 
+    __match_args__ = ("_value",)
+
     def __init__(self, value: E = True) -> None:
         self._value = value