MAINT: Add a void *reserved_null field to descr for possible future use

seberg · seberg · commit 9cb60ed8e5be · 2024-03-06T19:41:02.000+01:00
diff --git a/numpy/_core/include/numpy/ndarraytypes.h b/numpy/_core/include/numpy/ndarraytypes.h
@@ -609,6 +609,8 @@ typedef struct _PyArray_Descr {
         PyObject *metadata;
         /* Cached hash value (-1 if not yet computed). */
         npy_hash_t hash;
+        /* Unused slot (must be initialized to NULL) for future use */
+        void *reserved_null;
 } PyArray_Descr;
 
 #else  /* 1.x and 2.x compatible version (only shared fields): */
@@ -637,6 +639,7 @@ typedef struct {
         npy_intp alignment;
         PyObject *metadata;
         npy_hash_t hash;
+        void *reserved_null;
 } _PyArray_DescrNumPy2;
 
 #endif  /* 1.x and 2.x compatible version */
@@ -659,6 +662,7 @@ typedef struct {
         npy_intp alignment;
         PyObject *metadata;
         npy_hash_t hash;
+        void *reserved_null;
         struct _arr_descr *subarray;
         PyObject *fields;
         PyObject *names;
