python
diff --git a/‎Doc/c-api/unicode.rst‎
Lines changed: 1 addition & 1 deletion b/‎Doc/c-api/unicode.rst‎
Lines changed: 1 addition & 1 deletion
diff --git a/‎Include/cpython/unicodeobject.h‎
Lines changed: 1 addition & 1 deletion b/‎Include/cpython/unicodeobject.h‎
Lines changed: 1 addition & 1 deletion
diff --git a/‎Misc/NEWS.d/next/C_API/2026-03-18-23-44-29.gh-issue-146143.pwIrJq.rst‎
Lines changed: 2 additions & 0 deletions b/‎Misc/NEWS.d/next/C_API/2026-03-18-23-44-29.gh-issue-146143.pwIrJq.rst‎
Lines changed: 2 additions & 0 deletions
diff --git a/‎Objects/unicodeobject.c‎
Lines changed: 1 addition & 1 deletion b/‎Objects/unicodeobject.c‎
Lines changed: 1 addition & 1 deletion
@@ -1867,7 +1867,7 @@ object.
    On success, return ``0``.
    On error, set an exception, leave the writer unchanged, and return ``-1``.
 
-.. c:function:: int PyUnicodeWriter_WriteUCS4(PyUnicodeWriter *writer, Py_UCS4 *str, Py_ssize_t size)
+.. c:function:: int PyUnicodeWriter_WriteUCS4(PyUnicodeWriter *writer, const Py_UCS4 *str, Py_ssize_t size)
 
    Writer the UCS4 string *str* into *writer*.
 
 
@@ -496,7 +496,7 @@ PyAPI_FUNC(int) PyUnicodeWriter_WriteWideChar(
     Py_ssize_t size);
 PyAPI_FUNC(int) PyUnicodeWriter_WriteUCS4(
     PyUnicodeWriter *writer,
-    Py_UCS4 *str,
+    const Py_UCS4 *str,
     Py_ssize_t size);
 
 PyAPI_FUNC(int) PyUnicodeWriter_WriteStr(
 
@@ -0,0 +1,2 @@
+:c:func:`PyUnicodeWriter_WriteUCS4` now accepts a pointer to a constant buffer
+of ``Py_UCS4``.
@@ -2224,7 +2224,7 @@ _PyUnicode_FromUCS4(const Py_UCS4 *u, Py_ssize_t size)
 
 int
 PyUnicodeWriter_WriteUCS4(PyUnicodeWriter *pub_writer,
-                          Py_UCS4 *str,
+                          const Py_UCS4 *str,
                           Py_ssize_t size)
 {
     _PyUnicodeWriter *writer = (_PyUnicodeWriter*)pub_writer;
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+:c:func:`PyUnicodeWriter_WriteUCS4` now accepts a pointer to a constant buffer
	`2`	+of ``Py_UCS4``.
Original file line number	Diff line number	Diff line change
`@@ -2224,7 +2224,7 @@ _PyUnicode_FromUCS4(const Py_UCS4 *u, Py_ssize_t size)`
`2224`	`2224`
`2225`	`2225`	`int`
`2226`	`2226`	`PyUnicodeWriter_WriteUCS4(PyUnicodeWriter *pub_writer,`
`2227`		`- Py_UCS4 *str,`
	`2227`	`+ const Py_UCS4 *str,`
`2228`	`2228`	`Py_ssize_t size)`
`2229`	`2229`	`{`
`2230`	`2230`	`_PyUnicodeWriter writer = (_PyUnicodeWriter)pub_writer;`