From dcaea8bf06191d00c51a73fd932af09097cf208a Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Wed, 30 Dec 2020 14:31:40 -0800
Subject: [PATCH] Add TypeGuard (PEP 647 draft) (#4879)

---
 stdlib/3/typing.pyi                     | 1 +
 third_party/2and3/typing_extensions.pyi | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/stdlib/3/typing.pyi b/stdlib/3/typing.pyi
index b74a5435f..a2ed53cf9 100644
--- a/stdlib/3/typing.pyi
+++ b/stdlib/3/typing.pyi
@@ -61,6 +61,7 @@ if sys.version_info >= (3, 10):
         def __init__(self, name: str) -> None: ...
     Concatenate: _SpecialForm = ...
     TypeAlias: _SpecialForm = ...
+    TypeGuard: _SpecialForm = ...
 
 # Return type that indicates a function does not return.
 # This type is equivalent to the None type, but the no-op Union is necessary to
diff --git a/third_party/2and3/typing_extensions.pyi b/third_party/2and3/typing_extensions.pyi
index aec0f9440..f103a0faf 100644
--- a/third_party/2and3/typing_extensions.pyi
+++ b/third_party/2and3/typing_extensions.pyi
@@ -112,3 +112,6 @@ else:
         __name__: str
         def __init__(self, name: str) -> None: ...
     Concatenate: _SpecialForm = ...
+
+# PEP 647
+TypeGuard: _SpecialForm = ...