Intermediate changes

1 files changed, 62 insertions, 0 deletions

diff --git a/contrib/python/Automat/py3/automat/_runtimeproto.py b/contrib/python/Automat/py3/automat/_runtimeproto.py
new file mode 100644
index 00000000000..c9c7409f5ab
--- /dev/null
+++ b/contrib/python/Automat/py3/automat/_runtimeproto.py
@@ -0,0 +1,62 @@
+"""
+Workaround for U{the lack of TypeForm
+<https://github.com/python/mypy/issues/9773>}.
+"""
+
+from __future__ import annotations
+
+import sys
+
+from typing import TYPE_CHECKING, Callable, Protocol, TypeVar
+
+from inspect import signature, Signature
+
+T = TypeVar("T")
+
+ProtocolAtRuntime = Callable[[], T]
+
+
+def runtime_name(x: ProtocolAtRuntime[T]) -> str:
+    return x.__name__
+
+
+from inspect import getmembers, isfunction
+
+emptyProtocolMethods: frozenset[str]
+if not TYPE_CHECKING:
+    emptyProtocolMethods = frozenset(
+        name
+        for name, each in getmembers(type("Example", tuple([Protocol]), {}), isfunction)
+    )
+
+
+def actuallyDefinedProtocolMethods(protocol: object) -> frozenset[str]:
+    """
+    Attempt to ignore implementation details, and get all the methods that the
+    protocol actually defines.
+
+    that includes locally defined methods and also those defined in inherited
+    superclasses.
+    """
+    return (
+        frozenset(name for name, each in getmembers(protocol, isfunction))
+        - emptyProtocolMethods
+    )
+
+
+def _fixAnnotation(method: Callable[..., object], it: object, ann: str) -> None:
+    annotation = getattr(it, ann)
+    if isinstance(annotation, str):
+        setattr(it, ann, eval(annotation, method.__globals__))
+
+
+def _liveSignature(method: Callable[..., object]) -> Signature:
+    """
+    Get a signature with evaluated annotations.
+    """
+    # TODO: could this be replaced with get_type_hints?
+    result = signature(method)
+    for param in result.parameters.values():
+        _fixAnnotation(method, param, "_annotation")
+    _fixAnnotation(method, result, "_return_annotation")
+    return result