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bpo-43908: Add Py_TPFLAGS_IMMUTABLETYPE flag (GH-25520)

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Introduce Py_TPFLAGS_IMMUTABLETYPE flag for immutable type objects, and
modify PyType_Ready() to set it for static types.

Co-authored-by: Victor Stinner <vstinner@python.org>
This commit is contained in:
Erlend Egeberg Aasland 2021-04-28 19:02:42 +02:00 • committed by GitHub
parent 3cc481b9de
commit 3b52c8d66b
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4 changed files with 24 additions and 1 deletions
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3
Include/object.h
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@ -320,6 +320,9 @@ Code can use PyType_HasFeature(type_ob, flag_value) to test whether the
given type object has a specified feature.
*/
/* Set if the type object is immutable: type attributes cannot be set nor deleted */
#define Py_TPFLAGS_IMMUTABLETYPE (1UL << 8)
/* Set if the type object is dynamically allocated */
#define Py_TPFLAGS_HEAPTYPE (1UL << 9)