From 4a52a71956a8d46fcb7294ac71734504bb09bcc2 Mon Sep 17 00:00:00 2001
From: S. Solomon Darnell
Date: Fri, 28 Mar 2025 21:52:21 -0500
Subject: two version of R2R are here

---
 .../python3.12/site-packages/dns/_immutable_ctx.py | 76 ++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 .venv/lib/python3.12/site-packages/dns/_immutable_ctx.py

(limited to '.venv/lib/python3.12/site-packages/dns/_immutable_ctx.py')

diff --git a/.venv/lib/python3.12/site-packages/dns/_immutable_ctx.py b/.venv/lib/python3.12/site-packages/dns/_immutable_ctx.py
new file mode 100644
index 00000000..ae7a33bf
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/dns/_immutable_ctx.py
@@ -0,0 +1,76 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+# This implementation of the immutable decorator requires python >=
+# 3.7, and is significantly more storage efficient when making classes
+# with slots immutable.  It's also faster.
+
+import contextvars
+import inspect
+
+_in__init__ = contextvars.ContextVar("_immutable_in__init__", default=False)
+
+
+class _Immutable:
+    """Immutable mixin class"""
+
+    # We set slots to the empty list to say "we don't have any attributes".
+    # We do this so that if we're mixed in with a class with __slots__, we
+    # don't cause a __dict__ to be added which would waste space.
+
+    __slots__ = ()
+
+    def __setattr__(self, name, value):
+        if _in__init__.get() is not self:
+            raise TypeError("object doesn't support attribute assignment")
+        else:
+            super().__setattr__(name, value)
+
+    def __delattr__(self, name):
+        if _in__init__.get() is not self:
+            raise TypeError("object doesn't support attribute assignment")
+        else:
+            super().__delattr__(name)
+
+
+def _immutable_init(f):
+    def nf(*args, **kwargs):
+        previous = _in__init__.set(args[0])
+        try:
+            # call the actual __init__
+            f(*args, **kwargs)
+        finally:
+            _in__init__.reset(previous)
+
+    nf.__signature__ = inspect.signature(f)
+    return nf
+
+
+def immutable(cls):
+    if _Immutable in cls.__mro__:
+        # Some ancestor already has the mixin, so just make sure we keep
+        # following the __init__ protocol.
+        cls.__init__ = _immutable_init(cls.__init__)
+        if hasattr(cls, "__setstate__"):
+            cls.__setstate__ = _immutable_init(cls.__setstate__)
+        ncls = cls
+    else:
+        # Mixin the Immutable class and follow the __init__ protocol.
+        class ncls(_Immutable, cls):
+            # We have to do the __slots__ declaration here too!
+            __slots__ = ()
+
+            @_immutable_init
+            def __init__(self, *args, **kwargs):
+                super().__init__(*args, **kwargs)
+
+            if hasattr(cls, "__setstate__"):
+
+                @_immutable_init
+                def __setstate__(self, *args, **kwargs):
+                    super().__setstate__(*args, **kwargs)
+
+        # make ncls have the same name and module as cls
+        ncls.__name__ = cls.__name__
+        ncls.__qualname__ = cls.__qualname__
+        ncls.__module__ = cls.__module__
+    return ncls
-- 
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