From 72f5afb8c3a15114f8033a51b390f845b49a209c Mon Sep 17 00:00:00 2001
From: Marc Mueller <30130371+cdce8p@users.noreply.github.com>
Date: Tue, 31 Jan 2023 21:46:52 +0100
Subject: Revert CallContext change since it caused a RecursionError regression
 (#2000)

This reverts commit a0d219cb3403cda3338a14ce67a60954b4ff5cd7 (#1982).
---
 astroid/brain/brain_typing.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'astroid/brain')

diff --git a/astroid/brain/brain_typing.py b/astroid/brain/brain_typing.py
index 6a134072..b11bfa19 100644
--- a/astroid/brain/brain_typing.py
+++ b/astroid/brain/brain_typing.py
@@ -28,6 +28,7 @@ from astroid.nodes.node_classes import (
     Const,
     JoinedStr,
     Name,
+    NodeNG,
     Subscript,
     Tuple,
 )
@@ -379,6 +380,36 @@ def infer_special_alias(
     return iter([class_def])
 
 
+def _looks_like_typing_cast(node: Call) -> bool:
+    return isinstance(node, Call) and (
+        isinstance(node.func, Name)
+        and node.func.name == "cast"
+        or isinstance(node.func, Attribute)
+        and node.func.attrname == "cast"
+    )
+
+
+def infer_typing_cast(
+    node: Call, ctx: context.InferenceContext | None = None
+) -> Iterator[NodeNG]:
+    """Infer call to cast() returning same type as casted-from var."""
+    if not isinstance(node.func, (Name, Attribute)):
+        raise UseInferenceDefault
+
+    try:
+        func = next(node.func.infer(context=ctx))
+    except (InferenceError, StopIteration) as exc:
+        raise UseInferenceDefault from exc
+    if (
+        not isinstance(func, FunctionDef)
+        or func.qname() != "typing.cast"
+        or len(node.args) != 2
+    ):
+        raise UseInferenceDefault
+
+    return node.args[1].infer(context=ctx)
+
+
 AstroidManager().register_transform(
     Call,
     inference_tip(infer_typing_typevar_or_newtype),
@@ -387,6 +418,9 @@ AstroidManager().register_transform(
 AstroidManager().register_transform(
     Subscript, inference_tip(infer_typing_attr), _looks_like_typing_subscript
 )
+AstroidManager().register_transform(
+    Call, inference_tip(infer_typing_cast), _looks_like_typing_cast
+)
 
 if PY39_PLUS:
     AstroidManager().register_transform(
-- 
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