gh-92536: PEP 623: Remove wstr and legacy APIs from Unicode (GH-92537)

Doc/c-api/arg.rst

@@ -136,48 +136,6 @@ which disallows mutable objects such as :class:`bytearray`.
    attempting any conversion.  Raises :exc:`TypeError` if the object is not
    a :class:`bytearray` object. The C variable may also be declared as :c:type:`PyObject*`.
 
-``u`` (:class:`str`) [const Py_UNICODE \*]
-   Convert a Python Unicode object to a C pointer to a NUL-terminated buffer of
-   Unicode characters.  You must pass the address of a :c:type:`Py_UNICODE`
-   pointer variable, which will be filled with the pointer to an existing
-   Unicode buffer.  Please note that the width of a :c:type:`Py_UNICODE`
-   character depends on compilation options (it is either 16 or 32 bits).
-   The Python string must not contain embedded null code points; if it does,
-   a :exc:`ValueError` exception is raised.
-
-   .. versionchanged:: 3.5
-      Previously, :exc:`TypeError` was raised when embedded null code points
-      were encountered in the Python string.
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style :c:type:`Py_UNICODE` API; please migrate to using
-      :c:func:`PyUnicode_AsWideCharString`.
-
-``u#`` (:class:`str`) [const Py_UNICODE \*, :c:type:`Py_ssize_t`]
-   This variant on ``u`` stores into two C variables, the first one a pointer to a
-   Unicode data buffer, the second one its length.  This variant allows
-   null code points.
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style :c:type:`Py_UNICODE` API; please migrate to using
-      :c:func:`PyUnicode_AsWideCharString`.
-
-``Z`` (:class:`str` or ``None``) [const Py_UNICODE \*]
-   Like ``u``, but the Python object may also be ``None``, in which case the
-   :c:type:`Py_UNICODE` pointer is set to ``NULL``.
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style :c:type:`Py_UNICODE` API; please migrate to using
-      :c:func:`PyUnicode_AsWideCharString`.
-
-``Z#`` (:class:`str` or ``None``) [const Py_UNICODE \*, :c:type:`Py_ssize_t`]
-   Like ``u#``, but the Python object may also be ``None``, in which case the
-   :c:type:`Py_UNICODE` pointer is set to ``NULL``.
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style :c:type:`Py_UNICODE` API; please migrate to using
-      :c:func:`PyUnicode_AsWideCharString`.
-
 ``U`` (:class:`str`) [PyObject \*]
    Requires that the Python object is a Unicode object, without attempting
    any conversion.  Raises :exc:`TypeError` if the object is not a Unicode
@@ -247,6 +205,11 @@ which disallows mutable objects such as :class:`bytearray`.
    them. Instead, the implementation assumes that the byte string object uses the
    encoding passed in as parameter.
 
+.. versionchanged:: 3.12
+   ``u``, ``u#``, ``Z``, and ``Z#`` are removed because they used legacy ``Py_UNICODE*``
+   representation.
+
+
 Numbers
 -------
 

Doc/c-api/unicode.rst

@@ -17,26 +17,12 @@ of Unicode characters while staying memory efficient.  There are special cases
 for strings where all code points are below 128, 256, or 65536; otherwise, code
 points must be below 1114112 (which is the full Unicode range).
 
-:c:type:`Py_UNICODE*` and UTF-8 representations are created on demand and cached
+UTF-8 representation is created on demand and cached in the Unicode object.
-in the Unicode object.  The :c:type:`Py_UNICODE*` representation is deprecated
-and inefficient.
-
-Due to the transition between the old APIs and the new APIs, Unicode objects
-can internally be in two states depending on how they were created:
-
-* "canonical" Unicode objects are all objects created by a non-deprecated
-  Unicode API.  They use the most efficient representation allowed by the
-  implementation.
-
-* "legacy" Unicode objects have been created through one of the deprecated
-  APIs (typically :c:func:`PyUnicode_FromUnicode`) and only bear the
-  :c:type:`Py_UNICODE*` representation; you will have to call
-  :c:func:`PyUnicode_READY` on them before calling any other API.
 
 .. note::
-   The "legacy" Unicode object will be removed in Python 3.12 with deprecated
+   The :c:type:`Py_UNICODE` representation has been removed since Python 3.12
-   APIs. All Unicode objects will be "canonical" since then. See :pep:`623`
+   with deprecated APIs.
-   for more information.
+   See :pep:`623` for more information.
 
 
 Unicode Type
@@ -101,18 +87,12 @@ access to internal read-only data of Unicode objects:
 
 .. c:function:: int PyUnicode_READY(PyObject *o)
 
-   Ensure the string object *o* is in the "canonical" representation.  This is
+   Returns ``0``. This API is kept only for backward compatibility.
-   required before using any of the access macros described below.
-
-   .. XXX expand on when it is not required
-
-   Returns ``0`` on success and ``-1`` with an exception set on failure, which in
-   particular happens if memory allocation fails.
 
    .. versionadded:: 3.3
 
-   .. deprecated-removed:: 3.10 3.12
+   .. deprecated:: 3.10
-      This API will be removed with :c:func:`PyUnicode_FromUnicode`.
+      This API do nothing since Python 3.12. Please remove code using this function.
 
 
 .. c:function:: Py_ssize_t PyUnicode_GET_LENGTH(PyObject *o)
@@ -130,14 +110,12 @@ access to internal read-only data of Unicode objects:
    Return a pointer to the canonical representation cast to UCS1, UCS2 or UCS4
    integer types for direct character access.  No checks are performed if the
    canonical representation has the correct character size; use
-   :c:func:`PyUnicode_KIND` to select the right function.  Make sure
+   :c:func:`PyUnicode_KIND` to select the right function.
-   :c:func:`PyUnicode_READY` has been called before accessing this.
 
    .. versionadded:: 3.3
 
 
-.. c:macro:: PyUnicode_WCHAR_KIND
+.. c:macro:: PyUnicode_1BYTE_KIND
-             PyUnicode_1BYTE_KIND
              PyUnicode_2BYTE_KIND
              PyUnicode_4BYTE_KIND
 
@@ -145,8 +123,8 @@ access to internal read-only data of Unicode objects:
 
    .. versionadded:: 3.3
 
-   .. deprecated-removed:: 3.10 3.12
+   .. versionchanged:: 3.12
-      ``PyUnicode_WCHAR_KIND`` is deprecated.
+      ``PyUnicode_WCHAR_KIND`` has been removed.
 
 
 .. c:function:: int PyUnicode_KIND(PyObject *o)
@@ -155,8 +133,6 @@ access to internal read-only data of Unicode objects:
    bytes per character this Unicode object uses to store its data.  *o* has to
    be a Unicode object in the "canonical" representation (not checked).
 
-   .. XXX document "0" return value?
-
    .. versionadded:: 3.3
 
 
@@ -208,49 +184,6 @@ access to internal read-only data of Unicode objects:
    .. versionadded:: 3.3
 
 
-.. c:function:: Py_ssize_t PyUnicode_GET_SIZE(PyObject *o)
-
-   Return the size of the deprecated :c:type:`Py_UNICODE` representation, in
-   code units (this includes surrogate pairs as 2 units).  *o* has to be a
-   Unicode object (not checked).
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style Unicode API, please migrate to using
-      :c:func:`PyUnicode_GET_LENGTH`.
-
-
-.. c:function:: Py_ssize_t PyUnicode_GET_DATA_SIZE(PyObject *o)
-
-   Return the size of the deprecated :c:type:`Py_UNICODE` representation in
-   bytes.  *o* has to be a Unicode object (not checked).
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style Unicode API, please migrate to using
-      :c:func:`PyUnicode_GET_LENGTH`.
-
-
-.. c:function:: Py_UNICODE* PyUnicode_AS_UNICODE(PyObject *o)
-                const char* PyUnicode_AS_DATA(PyObject *o)
-
-   Return a pointer to a :c:type:`Py_UNICODE` representation of the object.  The
-   returned buffer is always terminated with an extra null code point.  It
-   may also contain embedded null code points, which would cause the string
-   to be truncated when used in most C functions.  The ``AS_DATA`` form
-   casts the pointer to :c:type:`const char *`.  The *o* argument has to be
-   a Unicode object (not checked).
-
-   .. versionchanged:: 3.3
-      This function is now inefficient -- because in many cases the
-      :c:type:`Py_UNICODE` representation does not exist and needs to be created
-      -- and can fail (return ``NULL`` with an exception set).  Try to port the
-      code to use the new :c:func:`PyUnicode_nBYTE_DATA` macros or use
-      :c:func:`PyUnicode_WRITE` or :c:func:`PyUnicode_READ`.
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style Unicode API, please migrate to using the
-      :c:func:`PyUnicode_nBYTE_DATA` family of macros.
-
-
 .. c:function:: int PyUnicode_IsIdentifier(PyObject *o)
 
    Return ``1`` if the string is a valid identifier according to the language
@@ -436,12 +369,17 @@ APIs:
 
    Create a Unicode object from the char buffer *u*.  The bytes will be
    interpreted as being UTF-8 encoded.  The buffer is copied into the new
-   object. If the buffer is not ``NULL``, the return value might be a shared
+   object.
-   object, i.e. modification of the data is not allowed.
+   The return value might be a shared object, i.e. modification of the data is
+   not allowed.
 
-   If *u* is ``NULL``, this function behaves like :c:func:`PyUnicode_FromUnicode`
+   This function raises :exc:`SystemError` when:
-   with the buffer set to ``NULL``.  This usage is deprecated in favor of
+
-   :c:func:`PyUnicode_New`, and will be removed in Python 3.12.
+   * *size* < 0,
+   * *u* is ``NULL`` and *size* > 0
+
+   .. versionchanged:: 3.12
+      *u* == ``NULL`` with *size* > 0 is not allowed anymore.
 
 
 .. c:function:: PyObject *PyUnicode_FromString(const char *u)
@@ -680,79 +618,6 @@ APIs:
    .. versionadded:: 3.3
 
 
-Deprecated Py_UNICODE APIs
-""""""""""""""""""""""""""
-
-.. deprecated-removed:: 3.3 3.12
-
-These API functions are deprecated with the implementation of :pep:`393`.
-Extension modules can continue using them, as they will not be removed in Python
-3.x, but need to be aware that their use can now cause performance and memory hits.
-
-
-.. c:function:: PyObject* PyUnicode_FromUnicode(const Py_UNICODE *u, Py_ssize_t size)
-
-   Create a Unicode object from the Py_UNICODE buffer *u* of the given size. *u*
-   may be ``NULL`` which causes the contents to be undefined. It is the user's
-   responsibility to fill in the needed data.  The buffer is copied into the new
-   object.
-
-   If the buffer is not ``NULL``, the return value might be a shared object.
-   Therefore, modification of the resulting Unicode object is only allowed when
-   *u* is ``NULL``.
-
-   If the buffer is ``NULL``, :c:func:`PyUnicode_READY` must be called once the
-   string content has been filled before using any of the access macros such as
-   :c:func:`PyUnicode_KIND`.
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style Unicode API, please migrate to using
-      :c:func:`PyUnicode_FromKindAndData`, :c:func:`PyUnicode_FromWideChar`, or
-      :c:func:`PyUnicode_New`.
-
-
-.. c:function:: Py_UNICODE* PyUnicode_AsUnicode(PyObject *unicode)
-
-   Return a read-only pointer to the Unicode object's internal
-   :c:type:`Py_UNICODE` buffer, or ``NULL`` on error. This will create the
-   :c:type:`Py_UNICODE*` representation of the object if it is not yet
-   available. The buffer is always terminated with an extra null code point.
-   Note that the resulting :c:type:`Py_UNICODE` string may also contain
-   embedded null code points, which would cause the string to be truncated when
-   used in most C functions.
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style Unicode API, please migrate to using
-      :c:func:`PyUnicode_AsUCS4`, :c:func:`PyUnicode_AsWideChar`,
-      :c:func:`PyUnicode_ReadChar` or similar new APIs.
-
-
-.. c:function:: Py_UNICODE* PyUnicode_AsUnicodeAndSize(PyObject *unicode, Py_ssize_t *size)
-
-   Like :c:func:`PyUnicode_AsUnicode`, but also saves the :c:func:`Py_UNICODE`
-   array length (excluding the extra null terminator) in *size*.
-   Note that the resulting :c:type:`Py_UNICODE*` string
-   may contain embedded null code points, which would cause the string to be
-   truncated when used in most C functions.
-
-   .. versionadded:: 3.3
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style Unicode API, please migrate to using
-      :c:func:`PyUnicode_AsUCS4`, :c:func:`PyUnicode_AsWideChar`,
-      :c:func:`PyUnicode_ReadChar` or similar new APIs.
-
-
-.. c:function:: Py_ssize_t PyUnicode_GetSize(PyObject *unicode)
-
-   Return the size of the deprecated :c:type:`Py_UNICODE` representation, in
-   code units (this includes surrogate pairs as 2 units).
-
-   .. deprecated-removed:: 3.3 3.12
-      Part of the old-style Unicode API, please migrate to using
-      :c:func:`PyUnicode_GET_LENGTH`.
-
-
 .. c:function:: PyObject* PyUnicode_FromObject(PyObject *obj)
 
    Copy an instance of a Unicode subtype to a new true Unicode object if

Doc/data/stable_abi.dat

@@ -761,7 +761,6 @@ function,PyUnicode_FromStringAndSize,3.2,,
 function,PyUnicode_FromWideChar,3.2,,
 function,PyUnicode_GetDefaultEncoding,3.2,,
 function,PyUnicode_GetLength,3.7,,
-function,PyUnicode_GetSize,3.2,,
 function,PyUnicode_InternFromString,3.2,,
 function,PyUnicode_InternImmortal,3.2,,
 function,PyUnicode_InternInPlace,3.2,,

Doc/howto/clinic.rst

@@ -848,15 +848,15 @@ on the right is the text you'd replace it with.
 ``'s#'``    ``str(zeroes=True)``
 ``'s*'``    ``Py_buffer(accept={buffer, str})``
 ``'U'``     ``unicode``
-``'u'``     ``Py_UNICODE``
+``'u'``     ``wchar_t``
-``'u#'``    ``Py_UNICODE(zeroes=True)``
+``'u#'``    ``wchar_t(zeroes=True)``
 ``'w*'``    ``Py_buffer(accept={rwbuffer})``
 ``'Y'``     ``PyByteArrayObject``
 ``'y'``     ``str(accept={bytes})``
 ``'y#'``    ``str(accept={robuffer}, zeroes=True)``
 ``'y*'``    ``Py_buffer``
-``'Z'``     ``Py_UNICODE(accept={str, NoneType})``
+``'Z'``     ``wchar_t(accept={str, NoneType})``
-``'Z#'``    ``Py_UNICODE(accept={str, NoneType}, zeroes=True)``
+``'Z#'``    ``wchar_t(accept={str, NoneType}, zeroes=True)``
 ``'z'``     ``str(accept={str, NoneType})``
 ``'z#'``    ``str(accept={str, NoneType}, zeroes=True)``
 ``'z*'``    ``Py_buffer(accept={buffer, str, NoneType})``

Doc/whatsnew/3.12.rst

@@ -66,6 +66,9 @@ Summary -- Release highlights
 
 .. PEP-sized items next.
 
+Important deprecations, removals or restrictions:
+
+* :pep:`623`, Remove wstr from Unicode
 
 
 New Features
@@ -91,7 +94,9 @@ Improved Modules
 Optimizations
 =============
 
-
+* Removed ``wstr`` and ``wstr_length`` members from Unicode objects.
+  It reduces object size by 8 or 16 bytes on 64bit platform. (:pep:`623`)
+  (Contributed by Inada Naoki in :gh:`92536`.)
 
 
 Deprecated
@@ -140,6 +145,13 @@ New Features
 Porting to Python 3.12
 ----------------------
 
+* Legacy Unicode APIs based on ``Py_UNICODE*`` representation has been removed.
+  Please migrate to APIs based on UTF-8 or ``wchar_t*``.
+
+* Argument parsing functions like :c:func:`PyArg_ParseTuple` doesn't support
+  ``Py_UNICODE*`` based format (e.g. ``u``, ``Z``) anymore. Please migrate
+  to other formats for Unicode like ``s``, ``z``, ``es``, and ``U``.
+
 Deprecated
 ----------
 
@@ -150,3 +162,15 @@ Removed
   API. The ``token.h`` header file was only designed to be used by Python
   internals.
   (Contributed by Victor Stinner in :gh:`92651`.)
+
+* Leagcy Unicode APIs has been removed. See :pep:`623` for detail.
+
+   * :c:macro:`PyUnicode_WCHAR_KIND`
+   * :c:func:`PyUnicode_AS_UNICODE`
+   * :c:func:`PyUnicode_AsUnicode`
+   * :c:func:`PyUnicode_AsUnicodeAndSize`
+   * :c:func:`PyUnicode_AS_DATA`
+   * :c:func:`PyUnicode_FromUnicode`
+   * :c:func:`PyUnicode_GET_SIZE`
+   * :c:func:`PyUnicode_GetSize`
+   * :c:func:`PyUnicode_GET_DATA_SIZE`

Include/cpython/unicodeobject.h

@@ -11,10 +11,6 @@
 
 /* --- Internal Unicode Operations ---------------------------------------- */
 
-#ifndef USE_UNICODE_WCHAR_CACHE
-#  define USE_UNICODE_WCHAR_CACHE 1
-#endif /* USE_UNICODE_WCHAR_CACHE */
-
 // Static inline functions to work with surrogates
 static inline int Py_UNICODE_IS_SURROGATE(Py_UCS4 ch) {
     return (0xD800 <= ch && ch <= 0xDFFF);
@@ -51,7 +47,7 @@ static inline Py_UCS4 Py_UNICODE_LOW_SURROGATE(Py_UCS4 ch) {
 
 /* ASCII-only strings created through PyUnicode_New use the PyASCIIObject
    structure. state.ascii and state.compact are set, and the data
-   immediately follow the structure. utf8_length and wstr_length can be found
+   immediately follow the structure. utf8_length can be found
    in the length field; the utf8 pointer is equal to the data pointer. */
 typedef struct {
     /* There are 4 forms of Unicode strings:
@@ -63,8 +59,7 @@ typedef struct {
          * kind = PyUnicode_1BYTE_KIND
          * compact = 1
          * ascii = 1
-         * ready = 1
+         * (length is the length of the utf8)
-         * (length is the length of the utf8 and wstr strings)
          * (data starts just after the structure)
          * (since ASCII is decoded from UTF-8, the utf8 string are the data)
 
@@ -75,55 +70,27 @@ typedef struct {
          * kind = PyUnicode_1BYTE_KIND, PyUnicode_2BYTE_KIND or
            PyUnicode_4BYTE_KIND
          * compact = 1
-         * ready = 1
          * ascii = 0
          * utf8 is not shared with data
          * utf8_length = 0 if utf8 is NULL
-         * wstr is shared with data and wstr_length=length
-           if kind=PyUnicode_2BYTE_KIND and sizeof(wchar_t)=2
-           or if kind=PyUnicode_4BYTE_KIND and sizeof(wchar_t)=4
-         * wstr_length = 0 if wstr is NULL
          * (data starts just after the structure)
 
-       - legacy string, not ready:
+       - legacy string:
-
-         * structure = PyUnicodeObject
-         * test: kind == PyUnicode_WCHAR_KIND
-         * length = 0 (use wstr_length)
-         * hash = -1
-         * kind = PyUnicode_WCHAR_KIND
-         * compact = 0
-         * ascii = 0
-         * ready = 0
-         * interned = SSTATE_NOT_INTERNED
-         * wstr is not NULL
-         * data.any is NULL
-         * utf8 is NULL
-         * utf8_length = 0
-
-       - legacy string, ready:
 
          * structure = PyUnicodeObject structure
-         * test: !PyUnicode_IS_COMPACT(op) && kind != PyUnicode_WCHAR_KIND
+         * test: !PyUnicode_IS_COMPACT(op)
          * kind = PyUnicode_1BYTE_KIND, PyUnicode_2BYTE_KIND or
            PyUnicode_4BYTE_KIND
          * compact = 0
-         * ready = 1
          * data.any is not NULL
          * utf8 is shared and utf8_length = length with data.any if ascii = 1
          * utf8_length = 0 if utf8 is NULL
-         * wstr is shared with data.any and wstr_length = length
-           if kind=PyUnicode_2BYTE_KIND and sizeof(wchar_t)=2
-           or if kind=PyUnicode_4BYTE_KIND and sizeof(wchar_4)=4
-         * wstr_length = 0 if wstr is NULL
 
        Compact strings use only one memory block (structure + characters),
        whereas legacy strings use one block for the structure and one block
        for characters.
 
-       Legacy strings are created by PyUnicode_FromUnicode() and
+       Legacy strings are created by subclasses of Unicode.
-       PyUnicode_FromStringAndSize(NULL, size) functions. They become ready
-       when PyUnicode_READY() is called.
 
        See also _PyUnicode_CheckConsistency().
     */
@@ -142,11 +109,6 @@ typedef struct {
         unsigned int interned:2;
         /* Character size:
 
-           - PyUnicode_WCHAR_KIND (0):
-
-             * character type = wchar_t (16 or 32 bits, depending on the
-               platform)
-
            - PyUnicode_1BYTE_KIND (1):
 
              * character type = Py_UCS1 (8 bits, unsigned)
@@ -177,16 +139,10 @@ typedef struct {
            and the kind is PyUnicode_1BYTE_KIND. If ascii is set and compact is
            set, use the PyASCIIObject structure. */
         unsigned int ascii:1;
-        /* The ready flag indicates whether the object layout is initialized
-           completely. This means that this is either a compact object, or
-           the data pointer is filled out. The bit is redundant, and helps
-           to minimize the test in PyUnicode_IS_READY(). */
-        unsigned int ready:1;
         /* Padding to ensure that PyUnicode_DATA() is always aligned to
            4 bytes (see issue #19537 on m68k). */
-        unsigned int :24;
+        unsigned int :25;
     } state;
-    wchar_t *wstr;              /* wchar_t representation (null-terminated) */
 } PyASCIIObject;
 
 /* Non-ASCII strings allocated through PyUnicode_New use the
@@ -197,13 +153,9 @@ typedef struct {
     Py_ssize_t utf8_length;     /* Number of bytes in utf8, excluding the
                                  * terminating \0. */
     char *utf8;                 /* UTF-8 representation (null-terminated) */
-    Py_ssize_t wstr_length;     /* Number of code points in wstr, possible
-                                 * surrogates count as two code points. */
 } PyCompactUnicodeObject;
 
-/* Strings allocated through PyUnicode_FromUnicode(NULL, len) use the
+/* Object format for Unicode subclasses. */
-   PyUnicodeObject structure. The actual string data is initially in the wstr
-   block, and copied into the data block using _PyUnicode_Ready. */
 typedef struct {
     PyCompactUnicodeObject _base;
     union {
@@ -247,10 +199,9 @@ static inline unsigned int PyUnicode_CHECK_INTERNED(PyObject *op) {
 #  define PyUnicode_CHECK_INTERNED(op) PyUnicode_CHECK_INTERNED(_PyObject_CAST(op))
 #endif
 
-/* Fast check to determine whether an object is ready. Equivalent to:
+/* For backward compatibility */
-   PyUnicode_IS_COMPACT(op) || _PyUnicodeObject_CAST(op)->data.any */
 static inline unsigned int PyUnicode_IS_READY(PyObject *op) {
-    return _PyASCIIObject_CAST(op)->state.ready;
+    return 1;
 }
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
 #  define PyUnicode_IS_READY(op) PyUnicode_IS_READY(_PyObject_CAST(op))
@@ -260,7 +211,6 @@ static inline unsigned int PyUnicode_IS_READY(PyObject *op) {
    string may be compact (PyUnicode_IS_COMPACT_ASCII) or not, but must be
    ready. */
 static inline unsigned int PyUnicode_IS_ASCII(PyObject *op) {
-    assert(PyUnicode_IS_READY(op));
     return _PyASCIIObject_CAST(op)->state.ascii;
 }
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
@@ -286,10 +236,6 @@ static inline int PyUnicode_IS_COMPACT_ASCII(PyObject *op) {
 #endif
 
 enum PyUnicode_Kind {
-/* String contains only wstr byte characters.  This is only possible
-   when the string was created with a legacy API and _PyUnicode_Ready()
-   has not been called yet.  */
-    PyUnicode_WCHAR_KIND = 0,
 /* Return values of the PyUnicode_KIND() function: */
     PyUnicode_1BYTE_KIND = 1,
     PyUnicode_2BYTE_KIND = 2,
@@ -298,8 +244,7 @@ enum PyUnicode_Kind {
 
 /* Return one of the PyUnicode_*_KIND values defined above. */
 #define PyUnicode_KIND(op) \
-    (assert(PyUnicode_IS_READY(op)), \
+    (_PyASCIIObject_CAST(op)->state.kind)
-     _PyASCIIObject_CAST(op)->state.kind)
 
 /* Return a void pointer to the raw unicode buffer. */
 static inline void* _PyUnicode_COMPACT_DATA(PyObject *op) {
@@ -335,11 +280,8 @@ static inline void* PyUnicode_DATA(PyObject *op) {
 #define PyUnicode_2BYTE_DATA(op) _Py_STATIC_CAST(Py_UCS2*, PyUnicode_DATA(op))
 #define PyUnicode_4BYTE_DATA(op) _Py_STATIC_CAST(Py_UCS4*, PyUnicode_DATA(op))
 
-/* Returns the length of the unicode string. The caller has to make sure that
+/* Returns the length of the unicode string. */
-   the string has it's canonical representation set before calling
-   this function.  Call PyUnicode_(FAST_)Ready to ensure that. */
 static inline Py_ssize_t PyUnicode_GET_LENGTH(PyObject *op) {
-    assert(PyUnicode_IS_READY(op));
     return _PyASCIIObject_CAST(op)->length;
 }
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
@@ -400,7 +342,6 @@ static inline Py_UCS4 PyUnicode_READ(int kind,
    cache kind and use PyUnicode_READ instead. */
 static inline Py_UCS4 PyUnicode_READ_CHAR(PyObject *unicode, Py_ssize_t index)
 {
-    assert(PyUnicode_IS_READY(unicode));
     int kind = PyUnicode_KIND(unicode);
     if (kind == PyUnicode_1BYTE_KIND) {
         return PyUnicode_1BYTE_DATA(unicode)[index];
@@ -421,7 +362,6 @@ static inline Py_UCS4 PyUnicode_READ_CHAR(PyObject *unicode, Py_ssize_t index)
    than iterating over the string. */
 static inline Py_UCS4 PyUnicode_MAX_CHAR_VALUE(PyObject *op)
 {
-    assert(PyUnicode_IS_READY(op));
     if (PyUnicode_IS_ASCII(op)) {
         return 0x7fU;
     }
@@ -453,27 +393,10 @@ PyAPI_FUNC(PyObject*) PyUnicode_New(
     Py_UCS4 maxchar             /* maximum code point value in the string */
     );
 
-/* Initializes the canonical string representation from the deprecated
+/* For backward compatibility */
-   wstr/Py_UNICODE representation. This function is used to convert Unicode
-   objects which were created using the old API to the new flexible format
-   introduced with PEP 393.
-
-   Don't call this function directly, use the public PyUnicode_READY() function
-   instead. */
-PyAPI_FUNC(int) _PyUnicode_Ready(
-    PyObject *unicode           /* Unicode object */
-    );
-
-/* PyUnicode_READY() does less work than _PyUnicode_Ready() in the best
-   case.  If the canonical representation is not yet set, it will still call
-   _PyUnicode_Ready().
-   Returns 0 on success and -1 on errors. */
 static inline int PyUnicode_READY(PyObject *op)
 {
-    if (PyUnicode_IS_READY(op)) {
     return 0;
-    }
-    return _PyUnicode_Ready(op);
 }
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
 #  define PyUnicode_READY(op) PyUnicode_READY(_PyObject_CAST(op))
@@ -565,133 +488,6 @@ PyAPI_FUNC(Py_UCS4) _PyUnicode_FindMaxChar (
     Py_ssize_t start,
     Py_ssize_t end);
 
-/* --- Legacy deprecated API ---------------------------------------------- */
-
-/* Create a Unicode Object from the Py_UNICODE buffer u of the given
-   size.
-
-   u may be NULL which causes the contents to be undefined. It is the
-   user's responsibility to fill in the needed data afterwards. Note
-   that modifying the Unicode object contents after construction is
-   only allowed if u was set to NULL.
-
-   The buffer is copied into the new object. */
-Py_DEPRECATED(3.3) PyAPI_FUNC(PyObject*) PyUnicode_FromUnicode(
-    const Py_UNICODE *u,        /* Unicode buffer */
-    Py_ssize_t size             /* size of buffer */
-    );
-
-/* Return a read-only pointer to the Unicode object's internal
-   Py_UNICODE buffer.
-   If the wchar_t/Py_UNICODE representation is not yet available, this
-   function will calculate it. */
-Py_DEPRECATED(3.3) PyAPI_FUNC(Py_UNICODE *) PyUnicode_AsUnicode(
-    PyObject *unicode           /* Unicode object */
-    );
-
-/* Similar to PyUnicode_AsUnicode(), but raises a ValueError if the string
-   contains null characters. */
-PyAPI_FUNC(const Py_UNICODE *) _PyUnicode_AsUnicode(
-    PyObject *unicode           /* Unicode object */
-    );
-
-/* Return a read-only pointer to the Unicode object's internal
-   Py_UNICODE buffer and save the length at size.
-   If the wchar_t/Py_UNICODE representation is not yet available, this
-   function will calculate it. */
-
-Py_DEPRECATED(3.3) PyAPI_FUNC(Py_UNICODE *) PyUnicode_AsUnicodeAndSize(
-    PyObject *unicode,          /* Unicode object */
-    Py_ssize_t *size            /* location where to save the length */
-    );
-
-
-/* Fast access macros */
-
-Py_DEPRECATED(3.3)
-static inline Py_ssize_t PyUnicode_WSTR_LENGTH(PyObject *op)
-{
-    if (PyUnicode_IS_COMPACT_ASCII(op)) {
-        return _PyASCIIObject_CAST(op)->length;
-    }
-    else {
-        return _PyCompactUnicodeObject_CAST(op)->wstr_length;
-    }
-}
-#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
-#  define PyUnicode_WSTR_LENGTH(op) PyUnicode_WSTR_LENGTH(_PyObject_CAST(op))
-#endif
-
-/* Returns the deprecated Py_UNICODE representation's size in code units
-   (this includes surrogate pairs as 2 units).
-   If the Py_UNICODE representation is not available, it will be computed
-   on request.  Use PyUnicode_GET_LENGTH() for the length in code points. */
-
-Py_DEPRECATED(3.3)
-static inline Py_ssize_t PyUnicode_GET_SIZE(PyObject *op)
-{
-    _Py_COMP_DIAG_PUSH
-    _Py_COMP_DIAG_IGNORE_DEPR_DECLS
-    if (_PyASCIIObject_CAST(op)->wstr == _Py_NULL) {
-        (void)PyUnicode_AsUnicode(op);
-        assert(_PyASCIIObject_CAST(op)->wstr != _Py_NULL);
-    }
-    return PyUnicode_WSTR_LENGTH(op);
-    _Py_COMP_DIAG_POP
-}
-#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
-#  define PyUnicode_GET_SIZE(op) PyUnicode_GET_SIZE(_PyObject_CAST(op))
-#endif
-
-Py_DEPRECATED(3.3)
-static inline Py_ssize_t PyUnicode_GET_DATA_SIZE(PyObject *op)
-{
-    _Py_COMP_DIAG_PUSH
-    _Py_COMP_DIAG_IGNORE_DEPR_DECLS
-    return PyUnicode_GET_SIZE(op) * Py_UNICODE_SIZE;
-    _Py_COMP_DIAG_POP
-}
-#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
-#  define PyUnicode_GET_DATA_SIZE(op) PyUnicode_GET_DATA_SIZE(_PyObject_CAST(op))
-#endif
-
-/* Alias for PyUnicode_AsUnicode().  This will create a wchar_t/Py_UNICODE
-   representation on demand.  Using this macro is very inefficient now,
-   try to port your code to use the new PyUnicode_*BYTE_DATA() macros or
-   use PyUnicode_WRITE() and PyUnicode_READ(). */
-
-Py_DEPRECATED(3.3)
-static inline Py_UNICODE* PyUnicode_AS_UNICODE(PyObject *op)
-{
-    wchar_t *wstr = _PyASCIIObject_CAST(op)->wstr;
-    if (wstr != _Py_NULL) {
-        return wstr;
-    }
-
-    _Py_COMP_DIAG_PUSH
-    _Py_COMP_DIAG_IGNORE_DEPR_DECLS
-    return PyUnicode_AsUnicode(op);
-    _Py_COMP_DIAG_POP
-}
-#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
-#  define PyUnicode_AS_UNICODE(op) PyUnicode_AS_UNICODE(_PyObject_CAST(op))
-#endif
-
-Py_DEPRECATED(3.3)
-static inline const char* PyUnicode_AS_DATA(PyObject *op)
-{
-    _Py_COMP_DIAG_PUSH
-    _Py_COMP_DIAG_IGNORE_DEPR_DECLS
-    Py_UNICODE *data = PyUnicode_AS_UNICODE(op);
-    // In C++, casting directly PyUnicode* to const char* is not valid
-    return _Py_STATIC_CAST(const char*, _Py_STATIC_CAST(const void*, data));
-    _Py_COMP_DIAG_POP
-}
-#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
-#  define PyUnicode_AS_DATA(op) PyUnicode_AS_DATA(_PyObject_CAST(op))
-#endif
-
-
 /* --- _PyUnicodeWriter API ----------------------------------------------- */
 
 typedef struct {
@@ -748,8 +544,7 @@ _PyUnicodeWriter_PrepareInternal(_PyUnicodeWriter *writer,
 
    Return 0 on success, raise an exception and return -1 on error. */
 #define _PyUnicodeWriter_PrepareKind(WRITER, KIND)                    \
-    (assert((KIND) != PyUnicode_WCHAR_KIND),                          \
+    ((KIND) <= (WRITER)->kind                                         \
-     (KIND) <= (WRITER)->kind                                         \
      ? 0                                                              \
      : _PyUnicodeWriter_PrepareKindInternal((WRITER), (KIND)))
 

Include/internal/pycore_runtime_init.h

@@ -102,7 +102,6 @@ extern "C" {
             .kind = 1, \
             .compact = 1, \
             .ascii = ASCII, \
-            .ready = 1, \
         }, \
     }
 #define _PyASCIIObject_INIT(LITERAL) \

Include/unicodeobject.h

@@ -171,13 +171,6 @@ PyAPI_FUNC(Py_ssize_t) PyUnicode_GetLength(
 );
 #endif
 
-/* Get the number of Py_UNICODE units in the
-   string representation. */
-
-Py_DEPRECATED(3.3) PyAPI_FUNC(Py_ssize_t) PyUnicode_GetSize(
-    PyObject *unicode           /* Unicode object */
-    );
-
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03030000
 /* Read a character from the string. */
 
@@ -198,9 +191,7 @@ PyAPI_FUNC(int) PyUnicode_WriteChar(
     );
 #endif
 
-/* Resize a Unicode object. The length is the number of characters, except
+/* Resize a Unicode object. The length is the number of codepoints.
-   if the kind of the string is PyUnicode_WCHAR_KIND: in this case, the length
-   is the number of Py_UNICODE characters.
 
    *unicode is modified to point to the new (resized) object and 0
    returned on success.

Lib/test/clinic.test

@@ -1819,17 +1819,11 @@ test_Py_UNICODE_converter(PyObject *module, PyObject *const *args, Py_ssize_t na
 
 exit:
     /* Cleanup for a */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)a);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     /* Cleanup for b */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)b);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     /* Cleanup for c */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)c);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -1839,7 +1833,7 @@ test_Py_UNICODE_converter_impl(PyObject *module, const Py_UNICODE *a,
                                const Py_UNICODE *b, const Py_UNICODE *c,
                                const Py_UNICODE *d, Py_ssize_t d_length,
                                const Py_UNICODE *e, Py_ssize_t e_length)
-/*[clinic end generated code: output=45e92604de227552 input=064a3b68ad7f04b0]*/
+/*[clinic end generated code: output=4d426808cdbb3ea3 input=064a3b68ad7f04b0]*/
 
 
 /*[clinic input]

Lib/test/test_getargs2.py

@@ -1162,7 +1162,7 @@ class SkipitemTest(unittest.TestCase):
         dict_b = {'b':1}
         keywords = ["a", "b"]
 
-        supported = ('s#', 's*', 'z#', 'z*', 'u#', 'Z#', 'y#', 'y*', 'w#', 'w*')
+        supported = ('s#', 's*', 'z#', 'z*', 'y#', 'y*', 'w#', 'w*')
         for c in string.ascii_letters:
             for c2 in '#*':
                 f = c + c2
@@ -1255,14 +1255,6 @@ class Test_testcapi(unittest.TestCase):
                     for name in dir(_testcapi)
                     if name.startswith('test_') and name.endswith('_code'))
 
-    @warnings_helper.ignore_warnings(category=DeprecationWarning)
-    def test_u_code(self):
-        _testcapi.test_u_code()
-
-    @warnings_helper.ignore_warnings(category=DeprecationWarning)
-    def test_Z_code(self):
-        _testcapi.test_Z_code()
-
 
 if __name__ == "__main__":
     unittest.main()

Lib/test/test_sys.py

@@ -1538,8 +1538,8 @@ class SizeofTest(unittest.TestCase):
         samples = ['1'*100, '\xff'*50,
                    '\u0100'*40, '\uffff'*100,
                    '\U00010000'*30, '\U0010ffff'*100]
-        asciifields = "nnbP"
+        asciifields = "nnb"
-        compactfields = asciifields + "nPn"
+        compactfields = asciifields + "nP"
         unicodefields = compactfields + "P"
         for s in samples:
             maxchar = ord(max(s))

Makefile.pre.in

@@ -1405,8 +1405,7 @@ UNICODE_DEPS = \
 		$(srcdir)/Objects/stringlib/ucs2lib.h \
 		$(srcdir)/Objects/stringlib/ucs4lib.h \
 		$(srcdir)/Objects/stringlib/undef.h \
-		$(srcdir)/Objects/stringlib/unicode_format.h \
+		$(srcdir)/Objects/stringlib/unicode_format.h
-		$(srcdir)/Objects/stringlib/unicodedefs.h
 
 Objects/bytes_methods.o: $(srcdir)/Objects/bytes_methods.c $(BYTESTR_DEPS)
 Objects/bytesobject.o: $(srcdir)/Objects/bytesobject.c $(BYTESTR_DEPS)

Misc/NEWS.d/next/C API/2022-05-10-12-35-42.gh-issue-92536.cAoRCZ.rst

@@ -0,0 +1 @@
+Remove legacy Unicode APIs based on ``Py_UNICODE*``.

Misc/stable_abi.toml

@@ -1524,6 +1524,7 @@
     added = '3.2'
 [function.PyUnicode_GetSize]
     added = '3.2'
+    abi_only = true
 [function.PyUnicode_IsIdentifier]
     added = '3.2'
 [function.PyUnicode_Join]

Modules/_io/fileio.c

@@ -268,14 +268,7 @@ _io_FileIO___init___impl(fileio *self, PyObject *nameobj, const char *mode,
         if (!PyUnicode_FSDecoder(nameobj, &stringobj)) {
             return -1;
         }
-#if USE_UNICODE_WCHAR_CACHE
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-        widename = PyUnicode_AsUnicode(stringobj);
-_Py_COMP_DIAG_POP
-#else /* USE_UNICODE_WCHAR_CACHE */
         widename = PyUnicode_AsWideCharString(stringobj, NULL);
-#endif /* USE_UNICODE_WCHAR_CACHE */
         if (widename == NULL)
             return -1;
 #else
@@ -497,9 +490,7 @@ _Py_COMP_DIAG_POP
 
  done:
 #ifdef MS_WINDOWS
-#if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free(widename);
-#endif /* USE_UNICODE_WCHAR_CACHE */
 #endif
     Py_CLEAR(stringobj);
     return ret;

Modules/_testcapimodule.c

@@ -1991,116 +1991,6 @@ exit:
     return return_value;
 }
 
-static volatile int x;
-
-#if USE_UNICODE_WCHAR_CACHE
-/* Ignore use of deprecated APIs */
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-
-/* Test the u and u# codes for PyArg_ParseTuple. May leak memory in case
-   of an error.
-*/
-static PyObject *
-test_u_code(PyObject *self, PyObject *Py_UNUSED(ignored))
-{
-    PyObject *tuple, *obj;
-    Py_UNICODE *value;
-    Py_ssize_t len;
-
-    /* issue4122: Undefined reference to _Py_ascii_whitespace on Windows */
-    /* Just use the macro and check that it compiles */
-    x = Py_UNICODE_ISSPACE(25);
-
-    tuple = PyTuple_New(1);
-    if (tuple == NULL)
-        return NULL;
-
-    obj = PyUnicode_Decode("test", strlen("test"),
-                           "ascii", NULL);
-    if (obj == NULL)
-        return NULL;
-
-    PyTuple_SET_ITEM(tuple, 0, obj);
-
-    value = 0;
-    if (!PyArg_ParseTuple(tuple, "u:test_u_code", &value)) {
-        return NULL;
-    }
-    if (value != PyUnicode_AS_UNICODE(obj))
-        return raiseTestError("test_u_code",
-            "u code returned wrong value for u'test'");
-    value = 0;
-    if (!PyArg_ParseTuple(tuple, "u#:test_u_code", &value, &len)) {
-        return NULL;
-    }
-    if (value != PyUnicode_AS_UNICODE(obj) ||
-        len != PyUnicode_GET_SIZE(obj))
-        return raiseTestError("test_u_code",
-            "u# code returned wrong values for u'test'");
-
-    Py_DECREF(tuple);
-    Py_RETURN_NONE;
-}
-
-/* Test Z and Z# codes for PyArg_ParseTuple */
-static PyObject *
-test_Z_code(PyObject *self, PyObject *Py_UNUSED(ignored))
-{
-    PyObject *tuple, *obj;
-    const Py_UNICODE *value1, *value2;
-    Py_ssize_t len1, len2;
-
-    tuple = PyTuple_New(2);
-    if (tuple == NULL)
-        return NULL;
-
-    obj = PyUnicode_FromString("test");
-    PyTuple_SET_ITEM(tuple, 0, obj);
-    Py_INCREF(Py_None);
-    PyTuple_SET_ITEM(tuple, 1, Py_None);
-
-    /* swap values on purpose */
-    value1 = NULL;
-    value2 = PyUnicode_AS_UNICODE(obj);
-
-    /* Test Z for both values */
-    if (!PyArg_ParseTuple(tuple, "ZZ:test_Z_code", &value1, &value2)) {
-        return NULL;
-    }
-    if (value1 != PyUnicode_AS_UNICODE(obj))
-        return raiseTestError("test_Z_code",
-            "Z code returned wrong value for 'test'");
-    if (value2 != NULL)
-        return raiseTestError("test_Z_code",
-            "Z code returned wrong value for None");
-
-    value1 = NULL;
-    value2 = PyUnicode_AS_UNICODE(obj);
-    len1 = -1;
-    len2 = -1;
-
-    /* Test Z# for both values */
-    if (!PyArg_ParseTuple(tuple, "Z#Z#:test_Z_code", &value1, &len1,
-                          &value2, &len2))
-    {
-        return NULL;
-    }
-    if (value1 != PyUnicode_AS_UNICODE(obj) ||
-        len1 != PyUnicode_GET_SIZE(obj))
-        return raiseTestError("test_Z_code",
-            "Z# code returned wrong values for 'test'");
-    if (value2 != NULL ||
-        len2 != 0)
-        return raiseTestError("test_Z_code",
-            "Z# code returned wrong values for None'");
-
-    Py_DECREF(tuple);
-    Py_RETURN_NONE;
-}
-_Py_COMP_DIAG_POP
-#endif /* USE_UNICODE_WCHAR_CACHE */
-
 static PyObject *
 test_widechar(PyObject *self, PyObject *Py_UNUSED(ignored))
 {
@@ -2151,35 +2041,7 @@ test_widechar(PyObject *self, PyObject *Py_UNUSED(ignored))
     else
         return raiseTestError("test_widechar",
                               "PyUnicode_FromWideChar(L\"\\U00110000\", 1) didn't fail");
-
-#if USE_UNICODE_WCHAR_CACHE
-/* Ignore use of deprecated APIs */
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-    wide = PyUnicode_FromUnicode(invalid, 1);
-    if (wide == NULL)
-        PyErr_Clear();
-    else
-        return raiseTestError("test_widechar",
-                              "PyUnicode_FromUnicode(L\"\\U00110000\", 1) didn't fail");
-
-    wide = PyUnicode_FromUnicode(NULL, 1);
-    if (wide == NULL)
-        return NULL;
-    PyUnicode_AS_UNICODE(wide)[0] = invalid[0];
-    if (_PyUnicode_Ready(wide) < 0) {
-        Py_DECREF(wide);
-        PyErr_Clear();
-    }
-    else {
-        Py_DECREF(wide);
-        return raiseTestError("test_widechar",
-                              "PyUnicode_Ready() didn't fail");
-    }
-_Py_COMP_DIAG_POP
-#endif /* USE_UNICODE_WCHAR_CACHE */
 #endif
-
     Py_RETURN_NONE;
 }
 
@@ -2357,36 +2219,6 @@ unicode_copycharacters(PyObject *self, PyObject *args)
     return Py_BuildValue("(Nn)", to_copy, copied);
 }
 
-#if USE_UNICODE_WCHAR_CACHE
-/* Ignore use of deprecated APIs */
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-
-static PyObject *
-unicode_legacy_string(PyObject *self, PyObject *args)
-{
-    Py_UNICODE *data;
-    Py_ssize_t len;
-    PyObject *u;
-
-    if (!PyArg_ParseTuple(args, "u#", &data, &len))
-        return NULL;
-
-    u = PyUnicode_FromUnicode(NULL, len);
-    if (u == NULL)
-        return NULL;
-
-    memcpy(PyUnicode_AS_UNICODE(u), data, len * sizeof(Py_UNICODE));
-
-    if (len > 0) { /* The empty string is always ready. */
-        assert(!PyUnicode_IS_READY(u));
-    }
-
-    return u;
-}
-_Py_COMP_DIAG_POP
-#endif /* USE_UNICODE_WCHAR_CACHE */
-
 static PyObject *
 getargs_w_star(PyObject *self, PyObject *args)
 {
@@ -6092,10 +5924,6 @@ static PyMethodDef TestMethods[] = {
     {"codec_incrementaldecoder",
      (PyCFunction)codec_incrementaldecoder,                      METH_VARARGS},
     {"test_s_code",             test_s_code,                     METH_NOARGS},
-#if USE_UNICODE_WCHAR_CACHE
-    {"test_u_code",             test_u_code,                     METH_NOARGS},
-    {"test_Z_code",             test_Z_code,                     METH_NOARGS},
-#endif /* USE_UNICODE_WCHAR_CACHE */
     {"test_widechar",           test_widechar,                   METH_NOARGS},
     {"unicode_aswidechar",      unicode_aswidechar,              METH_VARARGS},
     {"unicode_aswidecharstring",unicode_aswidecharstring,        METH_VARARGS},
@@ -6104,9 +5932,6 @@ static PyMethodDef TestMethods[] = {
     {"unicode_asutf8andsize",   unicode_asutf8andsize,           METH_VARARGS},
     {"unicode_findchar",        unicode_findchar,                METH_VARARGS},
     {"unicode_copycharacters",  unicode_copycharacters,          METH_VARARGS},
-#if USE_UNICODE_WCHAR_CACHE
-    {"unicode_legacy_string",   unicode_legacy_string,           METH_VARARGS},
-#endif /* USE_UNICODE_WCHAR_CACHE */
     {"_test_thread_state",      test_thread_state,               METH_VARARGS},
     {"_pending_threadfunc",     pending_threadfunc,              METH_VARARGS},
 #ifdef HAVE_GETTIMEOFDAY

Modules/clinic/_winapi.c.h

@@ -210,9 +210,7 @@ _winapi_CreateFileMapping(PyObject *module, PyObject *const *args, Py_ssize_t na
 
 exit:
     /* Cleanup for name */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)name);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -243,11 +241,7 @@ _winapi_CreateJunction(PyObject *module, PyObject *const *args, Py_ssize_t nargs
         _PyArg_BadArgument("CreateJunction", "argument 1", "str", args[0]);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    src_path = _PyUnicode_AsUnicode(args[0]);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     src_path = PyUnicode_AsWideCharString(args[0], NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (src_path == NULL) {
         goto exit;
     }
@@ -255,11 +249,7 @@ _winapi_CreateJunction(PyObject *module, PyObject *const *args, Py_ssize_t nargs
         _PyArg_BadArgument("CreateJunction", "argument 2", "str", args[1]);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    dst_path = _PyUnicode_AsUnicode(args[1]);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     dst_path = PyUnicode_AsWideCharString(args[1], NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (dst_path == NULL) {
         goto exit;
     }
@@ -267,13 +257,9 @@ _winapi_CreateJunction(PyObject *module, PyObject *const *args, Py_ssize_t nargs
 
 exit:
     /* Cleanup for src_path */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)src_path);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     /* Cleanup for dst_path */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)dst_path);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -412,13 +398,9 @@ _winapi_CreateProcess(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for application_name */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)application_name);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     /* Cleanup for current_directory */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)current_directory);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -767,9 +749,7 @@ _winapi_OpenFileMapping(PyObject *module, PyObject *const *args, Py_ssize_t narg
 
 exit:
     /* Cleanup for name */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)name);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -1184,4 +1164,4 @@ _winapi__mimetypes_read_windows_registry(PyObject *module, PyObject *const *args
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=a4ede01aede352a4 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=b007dde2e7f2fff8 input=a9049054013a1b77]*/

Modules/clinic/overlapped.c.h

@@ -230,9 +230,7 @@ _overlapped_CreateEvent(PyObject *module, PyObject *const *args, Py_ssize_t narg
 
 exit:
     /* Cleanup for Name */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)Name);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -812,11 +810,7 @@ _overlapped_Overlapped_ConnectPipe(OverlappedObject *self, PyObject *arg)
         _PyArg_BadArgument("ConnectPipe", "argument", "str", arg);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    Address = _PyUnicode_AsUnicode(arg);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     Address = PyUnicode_AsWideCharString(arg, NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (Address == NULL) {
         goto exit;
     }
@@ -824,9 +818,7 @@ _overlapped_Overlapped_ConnectPipe(OverlappedObject *self, PyObject *arg)
 
 exit:
     /* Cleanup for Address */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)Address);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -968,4 +960,4 @@ exit:
 
     return return_value;
 }
-/*[clinic end generated code: output=b0f15f5c09f1147e input=a9049054013a1b77]*/
+/*[clinic end generated code: output=9078d9f9984864a2 input=a9049054013a1b77]*/

Modules/clinic/posixmodule.c.h

@@ -1760,11 +1760,7 @@ os_system(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *k
         _PyArg_BadArgument("system", "argument 'command'", "str", args[0]);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    command = _PyUnicode_AsUnicode(args[0]);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     command = PyUnicode_AsWideCharString(args[0], NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (command == NULL) {
         goto exit;
     }
@@ -1776,9 +1772,7 @@ os_system(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *k
 
 exit:
     /* Cleanup for command */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)command);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -7264,11 +7258,7 @@ os_startfile(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject
             _PyArg_BadArgument("startfile", "argument 'operation'", "str", args[1]);
             goto exit;
         }
-        #if USE_UNICODE_WCHAR_CACHE
-        operation = _PyUnicode_AsUnicode(args[1]);
-        #else /* USE_UNICODE_WCHAR_CACHE */
         operation = PyUnicode_AsWideCharString(args[1], NULL);
-        #endif /* USE_UNICODE_WCHAR_CACHE */
         if (operation == NULL) {
             goto exit;
         }
@@ -7281,11 +7271,7 @@ os_startfile(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject
             _PyArg_BadArgument("startfile", "argument 'arguments'", "str", args[2]);
             goto exit;
         }
-        #if USE_UNICODE_WCHAR_CACHE
-        arguments = _PyUnicode_AsUnicode(args[2]);
-        #else /* USE_UNICODE_WCHAR_CACHE */
         arguments = PyUnicode_AsWideCharString(args[2], NULL);
-        #endif /* USE_UNICODE_WCHAR_CACHE */
         if (arguments == NULL) {
             goto exit;
         }
@@ -7312,13 +7298,9 @@ exit:
     /* Cleanup for filepath */
     path_cleanup(&filepath);
     /* Cleanup for operation */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)operation);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     /* Cleanup for arguments */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)arguments);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     /* Cleanup for cwd */
     path_cleanup(&cwd);
 
@@ -9370,4 +9352,4 @@ exit:
 #ifndef OS_WAITSTATUS_TO_EXITCODE_METHODDEF
     #define OS_WAITSTATUS_TO_EXITCODE_METHODDEF
 #endif /* !defined(OS_WAITSTATUS_TO_EXITCODE_METHODDEF) */
-/*[clinic end generated code: output=6150bcc25f5e4bc7 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=bae15f09a1b3d2e7 input=a9049054013a1b77]*/

Modules/overlapped.c

@@ -1346,7 +1346,7 @@ static int
 parse_address(PyObject *obj, SOCKADDR *Address, int Length)
 {
     PyObject *Host_obj;
-    Py_UNICODE *Host;
+    wchar_t *Host;
     unsigned short Port;
     unsigned long FlowInfo;
     unsigned long ScopeId;
@@ -1358,11 +1358,7 @@ parse_address(PyObject *obj, SOCKADDR *Address, int Length)
         if (!PyArg_ParseTuple(obj, "UH", &Host_obj, &Port)) {
             return -1;
         }
-#if USE_UNICODE_WCHAR_CACHE
-        Host = (wchar_t *)_PyUnicode_AsUnicode(Host_obj);
-#else /* USE_UNICODE_WCHAR_CACHE */
         Host = PyUnicode_AsWideCharString(Host_obj, NULL);
-#endif /* USE_UNICODE_WCHAR_CACHE */
         if (Host == NULL) {
             return -1;
         }
@@ -1374,9 +1370,7 @@ parse_address(PyObject *obj, SOCKADDR *Address, int Length)
         else {
             ((SOCKADDR_IN*)Address)->sin_port = htons(Port);
         }
-#if !USE_UNICODE_WCHAR_CACHE
         PyMem_Free(Host);
-#endif /* USE_UNICODE_WCHAR_CACHE */
         return Length;
     }
     case 4: {
@@ -1386,11 +1380,7 @@ parse_address(PyObject *obj, SOCKADDR *Address, int Length)
         {
             return -1;
         }
-#if USE_UNICODE_WCHAR_CACHE
-        Host = (wchar_t *)_PyUnicode_AsUnicode(Host_obj);
-#else /* USE_UNICODE_WCHAR_CACHE */
         Host = PyUnicode_AsWideCharString(Host_obj, NULL);
-#endif /* USE_UNICODE_WCHAR_CACHE */
         if (Host == NULL) {
             return -1;
         }
@@ -1404,9 +1394,7 @@ parse_address(PyObject *obj, SOCKADDR *Address, int Length)
             ((SOCKADDR_IN6*)Address)->sin6_flowinfo = FlowInfo;
             ((SOCKADDR_IN6*)Address)->sin6_scope_id = ScopeId;
         }
-#if !USE_UNICODE_WCHAR_CACHE
         PyMem_Free(Host);
-#endif /* USE_UNICODE_WCHAR_CACHE */
         return Length;
     }
     default:

Modules/posixmodule.c

@@ -1098,11 +1098,9 @@ typedef struct {
 static void
 path_cleanup(path_t *path)
 {
-#if !USE_UNICODE_WCHAR_CACHE
     wchar_t *wide = (wchar_t *)path->wide;
     path->wide = NULL;
     PyMem_Free(wide);
-#endif /* USE_UNICODE_WCHAR_CACHE */
     Py_CLEAR(path->object);
     Py_CLEAR(path->cleanup);
 }
@@ -1190,14 +1188,7 @@ path_converter(PyObject *o, void *p)
 
     if (is_unicode) {
 #ifdef MS_WINDOWS
-#if USE_UNICODE_WCHAR_CACHE
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-        wide = PyUnicode_AsUnicodeAndSize(o, &length);
-_Py_COMP_DIAG_POP
-#else /* USE_UNICODE_WCHAR_CACHE */
         wide = PyUnicode_AsWideCharString(o, &length);
-#endif /* USE_UNICODE_WCHAR_CACHE */
         if (!wide) {
             goto error_exit;
         }
@@ -1213,9 +1204,7 @@ _Py_COMP_DIAG_POP
         path->wide = wide;
         path->narrow = FALSE;
         path->fd = -1;
-#if !USE_UNICODE_WCHAR_CACHE
         wide = NULL;
-#endif /* USE_UNICODE_WCHAR_CACHE */
         goto success_exit;
 #else
         if (!PyUnicode_FSConverter(o, &bytes)) {
@@ -1291,15 +1280,8 @@ _Py_COMP_DIAG_POP
         goto error_exit;
     }
 
-#if USE_UNICODE_WCHAR_CACHE
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-    wide = PyUnicode_AsUnicodeAndSize(wo, &length);
-_Py_COMP_DIAG_POP
-#else /* USE_UNICODE_WCHAR_CACHE */
     wide = PyUnicode_AsWideCharString(wo, &length);
     Py_DECREF(wo);
-#endif /* USE_UNICODE_WCHAR_CACHE */
     if (!wide) {
         goto error_exit;
     }
@@ -1314,11 +1296,7 @@ _Py_COMP_DIAG_POP
     path->wide = wide;
     path->narrow = TRUE;
     Py_DECREF(bytes);
-#if USE_UNICODE_WCHAR_CACHE
-    path->cleanup = wo;
-#else /* USE_UNICODE_WCHAR_CACHE */
     wide = NULL;
-#endif /* USE_UNICODE_WCHAR_CACHE */
 #else
     path->wide = NULL;
     path->narrow = narrow;
@@ -1342,11 +1320,7 @@ _Py_COMP_DIAG_POP
     Py_XDECREF(o);
     Py_XDECREF(bytes);
 #ifdef MS_WINDOWS
-#if USE_UNICODE_WCHAR_CACHE
-    Py_XDECREF(wo);
-#else /* USE_UNICODE_WCHAR_CACHE */
     PyMem_Free(wide);
-#endif /* USE_UNICODE_WCHAR_CACHE */
 #endif
     return 0;
 }
@@ -13575,15 +13549,8 @@ DirEntry_fetch_stat(PyObject *module, DirEntry *self, int follow_symlinks)
 #ifdef MS_WINDOWS
     if (!PyUnicode_FSDecoder(self->path, &ub))
         return NULL;
-#if USE_UNICODE_WCHAR_CACHE
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-    const wchar_t *path = PyUnicode_AsUnicode(ub);
-_Py_COMP_DIAG_POP
-#else /* USE_UNICODE_WCHAR_CACHE */
     wchar_t *path = PyUnicode_AsWideCharString(ub, NULL);
     Py_DECREF(ub);
-#endif /* USE_UNICODE_WCHAR_CACHE */
 #else /* POSIX */
     if (!PyUnicode_FSConverter(self->path, &ub))
         return NULL;
@@ -13616,11 +13583,11 @@ _Py_COMP_DIAG_POP
         }
         Py_END_ALLOW_THREADS
     }
-#if defined(MS_WINDOWS) && !USE_UNICODE_WCHAR_CACHE
+#if defined(MS_WINDOWS)
     PyMem_Free(path);
-#else /* USE_UNICODE_WCHAR_CACHE */
+#else
     Py_DECREF(ub);
-#endif /* USE_UNICODE_WCHAR_CACHE */
+#endif
 
     if (result != 0)
         return path_object_error(self->path);
@@ -13814,19 +13781,10 @@ os_DirEntry_inode_impl(DirEntry *self)
 
         if (!PyUnicode_FSDecoder(self->path, &unicode))
             return NULL;
-#if USE_UNICODE_WCHAR_CACHE
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-        const wchar_t *path = PyUnicode_AsUnicode(unicode);
-        result = LSTAT(path, &stat);
-        Py_DECREF(unicode);
-_Py_COMP_DIAG_POP
-#else /* USE_UNICODE_WCHAR_CACHE */
         wchar_t *path = PyUnicode_AsWideCharString(unicode, NULL);
         Py_DECREF(unicode);
         result = LSTAT(path, &stat);
         PyMem_Free(path);
-#endif /* USE_UNICODE_WCHAR_CACHE */
 
         if (result != 0)
             return path_object_error(self->path);

Objects/stringlib/eq.h

@@ -4,15 +4,10 @@
  * unicode_eq() is called when the hash of two unicode objects is equal.
  */
 Py_LOCAL_INLINE(int)
-unicode_eq(PyObject *aa, PyObject *bb)
+unicode_eq(PyObject *a, PyObject *b)
 {
-    assert(PyUnicode_Check(aa));
+    assert(PyUnicode_Check(a));
-    assert(PyUnicode_Check(bb));
+    assert(PyUnicode_Check(b));
-    assert(PyUnicode_IS_READY(aa));
-    assert(PyUnicode_IS_READY(bb));
-
-    PyUnicodeObject *a = (PyUnicodeObject *)aa;
-    PyUnicodeObject *b = (PyUnicodeObject *)bb;
 
     if (PyUnicode_GET_LENGTH(a) != PyUnicode_GET_LENGTH(b))
         return 0;

Objects/stringlib/unicodedefs.h

@@ -1,32 +0,0 @@
-#ifndef STRINGLIB_UNICODEDEFS_H
-#define STRINGLIB_UNICODEDEFS_H
-
-/* this is sort of a hack.  there's at least one place (formatting
-   floats) where some stringlib code takes a different path if it's
-   compiled as unicode. */
-#define STRINGLIB_IS_UNICODE     1
-
-#define FASTSEARCH               fastsearch
-#define STRINGLIB(F)             stringlib_##F
-#define STRINGLIB_OBJECT         PyUnicodeObject
-#define STRINGLIB_SIZEOF_CHAR    Py_UNICODE_SIZE
-#define STRINGLIB_CHAR           Py_UNICODE
-#define STRINGLIB_TYPE_NAME      "unicode"
-#define STRINGLIB_PARSE_CODE     "U"
-#define STRINGLIB_ISSPACE        Py_UNICODE_ISSPACE
-#define STRINGLIB_ISLINEBREAK    BLOOM_LINEBREAK
-#define STRINGLIB_ISDECIMAL      Py_UNICODE_ISDECIMAL
-#define STRINGLIB_TODECIMAL      Py_UNICODE_TODECIMAL
-#define STRINGLIB_STR            PyUnicode_AS_UNICODE
-#define STRINGLIB_LEN            PyUnicode_GET_SIZE
-#define STRINGLIB_NEW            PyUnicode_FromUnicode
-#define STRINGLIB_CHECK          PyUnicode_Check
-#define STRINGLIB_CHECK_EXACT    PyUnicode_CheckExact
-#define STRINGLIB_MUTABLE 0
-
-#define STRINGLIB_TOSTR          PyObject_Str
-#define STRINGLIB_TOASCII        PyObject_ASCII
-
-#define STRINGLIB_WANT_CONTAINS_OBJ 1
-
-#endif /* !STRINGLIB_UNICODEDEFS_H */

PC/_msi.c

@@ -757,19 +757,13 @@ _msi_SummaryInformation_SetProperty_impl(msiobj *self, int field,
     int status;
 
     if (PyUnicode_Check(data)) {
-#if USE_UNICODE_WCHAR_CACHE
-        const WCHAR *value = _PyUnicode_AsUnicode(data);
-#else /* USE_UNICODE_WCHAR_CACHE */
         WCHAR *value = PyUnicode_AsWideCharString(data, NULL);
-#endif /* USE_UNICODE_WCHAR_CACHE */
         if (value == NULL) {
             return NULL;
         }
         status = MsiSummaryInfoSetPropertyW(self->h, field, VT_LPSTR,
             0, NULL, value);
-#if !USE_UNICODE_WCHAR_CACHE
         PyMem_Free(value);
-#endif /* USE_UNICODE_WCHAR_CACHE */
     } else if (PyLong_CheckExact(data)) {
         long value = PyLong_AsLong(data);
         if (value == -1 && PyErr_Occurred()) {

PC/clinic/_msi.c.h

@@ -208,11 +208,7 @@ _msi_Record_SetString(msiobj *self, PyObject *const *args, Py_ssize_t nargs)
         _PyArg_BadArgument("SetString", "argument 2", "str", args[1]);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    value = _PyUnicode_AsUnicode(args[1]);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     value = PyUnicode_AsWideCharString(args[1], NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (value == NULL) {
         goto exit;
     }
@@ -220,9 +216,7 @@ _msi_Record_SetString(msiobj *self, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for value */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)value);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -257,11 +251,7 @@ _msi_Record_SetStream(msiobj *self, PyObject *const *args, Py_ssize_t nargs)
         _PyArg_BadArgument("SetStream", "argument 2", "str", args[1]);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    value = _PyUnicode_AsUnicode(args[1]);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     value = PyUnicode_AsWideCharString(args[1], NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (value == NULL) {
         goto exit;
     }
@@ -269,9 +259,7 @@ _msi_Record_SetStream(msiobj *self, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for value */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)value);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -561,11 +549,7 @@ _msi_Database_OpenView(msiobj *self, PyObject *arg)
         _PyArg_BadArgument("OpenView", "argument", "str", arg);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    sql = _PyUnicode_AsUnicode(arg);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     sql = PyUnicode_AsWideCharString(arg, NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (sql == NULL) {
         goto exit;
     }
@@ -573,9 +557,7 @@ _msi_Database_OpenView(msiobj *self, PyObject *arg)
 
 exit:
     /* Cleanup for sql */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)sql);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -660,11 +642,7 @@ _msi_OpenDatabase(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         _PyArg_BadArgument("OpenDatabase", "argument 1", "str", args[0]);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    path = _PyUnicode_AsUnicode(args[0]);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     path = PyUnicode_AsWideCharString(args[0], NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (path == NULL) {
         goto exit;
     }
@@ -676,9 +654,7 @@ _msi_OpenDatabase(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for path */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)path);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -713,4 +689,4 @@ _msi_CreateRecord(PyObject *module, PyObject *arg)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=d7eb07e6bfcdc13f input=a9049054013a1b77]*/
+/*[clinic end generated code: output=a592695c4315db22 input=a9049054013a1b77]*/

PC/clinic/winreg.c.h

@@ -159,11 +159,7 @@ winreg_ConnectRegistry(PyObject *module, PyObject *const *args, Py_ssize_t nargs
         computer_name = NULL;
     }
     else if (PyUnicode_Check(args[0])) {
-        #if USE_UNICODE_WCHAR_CACHE
-        computer_name = _PyUnicode_AsUnicode(args[0]);
-        #else /* USE_UNICODE_WCHAR_CACHE */
         computer_name = PyUnicode_AsWideCharString(args[0], NULL);
-        #endif /* USE_UNICODE_WCHAR_CACHE */
         if (computer_name == NULL) {
             goto exit;
         }
@@ -183,9 +179,7 @@ winreg_ConnectRegistry(PyObject *module, PyObject *const *args, Py_ssize_t nargs
 
 exit:
     /* Cleanup for computer_name */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)computer_name);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -233,11 +227,7 @@ winreg_CreateKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         sub_key = NULL;
     }
     else if (PyUnicode_Check(args[1])) {
-        #if USE_UNICODE_WCHAR_CACHE
-        sub_key = _PyUnicode_AsUnicode(args[1]);
-        #else /* USE_UNICODE_WCHAR_CACHE */
         sub_key = PyUnicode_AsWideCharString(args[1], NULL);
-        #endif /* USE_UNICODE_WCHAR_CACHE */
         if (sub_key == NULL) {
             goto exit;
         }
@@ -254,9 +244,7 @@ winreg_CreateKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for sub_key */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)sub_key);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -318,9 +306,7 @@ winreg_CreateKeyEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs, Py
 
 exit:
     /* Cleanup for sub_key */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)sub_key);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -366,11 +352,7 @@ winreg_DeleteKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         _PyArg_BadArgument("DeleteKey", "argument 2", "str", args[1]);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    sub_key = _PyUnicode_AsUnicode(args[1]);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     sub_key = PyUnicode_AsWideCharString(args[1], NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (sub_key == NULL) {
         goto exit;
     }
@@ -378,9 +360,7 @@ winreg_DeleteKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for sub_key */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)sub_key);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -437,9 +417,7 @@ winreg_DeleteKeyEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs, Py
 
 exit:
     /* Cleanup for sub_key */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)sub_key);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -478,11 +456,7 @@ winreg_DeleteValue(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         value = NULL;
     }
     else if (PyUnicode_Check(args[1])) {
-        #if USE_UNICODE_WCHAR_CACHE
-        value = _PyUnicode_AsUnicode(args[1]);
-        #else /* USE_UNICODE_WCHAR_CACHE */
         value = PyUnicode_AsWideCharString(args[1], NULL);
-        #endif /* USE_UNICODE_WCHAR_CACHE */
         if (value == NULL) {
             goto exit;
         }
@@ -495,9 +469,7 @@ winreg_DeleteValue(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for value */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)value);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -622,11 +594,7 @@ winreg_ExpandEnvironmentStrings(PyObject *module, PyObject *arg)
         _PyArg_BadArgument("ExpandEnvironmentStrings", "argument", "str", arg);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    string = _PyUnicode_AsUnicode(arg);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     string = PyUnicode_AsWideCharString(arg, NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (string == NULL) {
         goto exit;
     }
@@ -634,9 +602,7 @@ winreg_ExpandEnvironmentStrings(PyObject *module, PyObject *arg)
 
 exit:
     /* Cleanup for string */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)string);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -734,11 +700,7 @@ winreg_LoadKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         _PyArg_BadArgument("LoadKey", "argument 2", "str", args[1]);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    sub_key = _PyUnicode_AsUnicode(args[1]);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     sub_key = PyUnicode_AsWideCharString(args[1], NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (sub_key == NULL) {
         goto exit;
     }
@@ -746,11 +708,7 @@ winreg_LoadKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         _PyArg_BadArgument("LoadKey", "argument 3", "str", args[2]);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    file_name = _PyUnicode_AsUnicode(args[2]);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     file_name = PyUnicode_AsWideCharString(args[2], NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (file_name == NULL) {
         goto exit;
     }
@@ -758,13 +716,9 @@ winreg_LoadKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for sub_key */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)sub_key);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     /* Cleanup for file_name */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)file_name);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -819,9 +773,7 @@ winreg_OpenKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObje
 
 exit:
     /* Cleanup for sub_key */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)sub_key);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -876,9 +828,7 @@ winreg_OpenKeyEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyOb
 
 exit:
     /* Cleanup for sub_key */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)sub_key);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -962,11 +912,7 @@ winreg_QueryValue(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         sub_key = NULL;
     }
     else if (PyUnicode_Check(args[1])) {
-        #if USE_UNICODE_WCHAR_CACHE
-        sub_key = _PyUnicode_AsUnicode(args[1]);
-        #else /* USE_UNICODE_WCHAR_CACHE */
         sub_key = PyUnicode_AsWideCharString(args[1], NULL);
-        #endif /* USE_UNICODE_WCHAR_CACHE */
         if (sub_key == NULL) {
             goto exit;
         }
@@ -979,9 +925,7 @@ winreg_QueryValue(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for sub_key */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)sub_key);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -1025,11 +969,7 @@ winreg_QueryValueEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         name = NULL;
     }
     else if (PyUnicode_Check(args[1])) {
-        #if USE_UNICODE_WCHAR_CACHE
-        name = _PyUnicode_AsUnicode(args[1]);
-        #else /* USE_UNICODE_WCHAR_CACHE */
         name = PyUnicode_AsWideCharString(args[1], NULL);
-        #endif /* USE_UNICODE_WCHAR_CACHE */
         if (name == NULL) {
             goto exit;
         }
@@ -1042,9 +982,7 @@ winreg_QueryValueEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for name */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)name);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -1093,11 +1031,7 @@ winreg_SaveKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         _PyArg_BadArgument("SaveKey", "argument 2", "str", args[1]);
         goto exit;
     }
-    #if USE_UNICODE_WCHAR_CACHE
-    file_name = _PyUnicode_AsUnicode(args[1]);
-    #else /* USE_UNICODE_WCHAR_CACHE */
     file_name = PyUnicode_AsWideCharString(args[1], NULL);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
     if (file_name == NULL) {
         goto exit;
     }
@@ -1105,9 +1039,7 @@ winreg_SaveKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for file_name */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)file_name);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -1162,9 +1094,7 @@ winreg_SetValue(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for sub_key */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)sub_key);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -1238,9 +1168,7 @@ winreg_SetValueEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 
 exit:
     /* Cleanup for value_name */
-    #if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free((void *)value_name);
-    #endif /* USE_UNICODE_WCHAR_CACHE */
 
     return return_value;
 }
@@ -1346,4 +1274,4 @@ winreg_QueryReflectionKey(PyObject *module, PyObject *arg)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=c3454803528f6e97 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=9782b1630b59e201 input=a9049054013a1b77]*/

PC/winreg.c

@@ -645,19 +645,9 @@ Py2Reg(PyObject *value, DWORD typ, BYTE **retDataBuf, DWORD *retDataSize)
                     t = PyList_GET_ITEM(value, j);
                     if (!PyUnicode_Check(t))
                         return FALSE;
-#if USE_UNICODE_WCHAR_CACHE
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-                    len = PyUnicode_GetSize(t);
-                    if (len < 0)
-                        return FALSE;
-                    len++;
-_Py_COMP_DIAG_POP
-#else /* USE_UNICODE_WCHAR_CACHE */
                     len = PyUnicode_AsWideChar(t, NULL, 0);
                     if (len < 0)
                         return FALSE;
-#endif /* USE_UNICODE_WCHAR_CACHE */
                     size += Py_SAFE_DOWNCAST(len * sizeof(wchar_t),
                                              size_t, DWORD);
                 }
@@ -1709,40 +1699,27 @@ winreg_SetValue_impl(PyObject *module, HKEY key, const Py_UNICODE *sub_key,
         return NULL;
     }
 
-#if USE_UNICODE_WCHAR_CACHE
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-    const wchar_t *value = PyUnicode_AsUnicodeAndSize(value_obj, &value_length);
-_Py_COMP_DIAG_POP
-#else /* USE_UNICODE_WCHAR_CACHE */
     wchar_t *value = PyUnicode_AsWideCharString(value_obj, &value_length);
-#endif /* USE_UNICODE_WCHAR_CACHE */
     if (value == NULL) {
         return NULL;
     }
     if ((Py_ssize_t)(DWORD)value_length != value_length) {
         PyErr_SetString(PyExc_OverflowError, "value is too long");
-#if !USE_UNICODE_WCHAR_CACHE
         PyMem_Free(value);
-#endif /* USE_UNICODE_WCHAR_CACHE */
         return NULL;
     }
 
     if (PySys_Audit("winreg.SetValue", "nunu#",
                     (Py_ssize_t)key, sub_key, (Py_ssize_t)type,
                     value, value_length) < 0) {
-#if !USE_UNICODE_WCHAR_CACHE
         PyMem_Free(value);
-#endif /* USE_UNICODE_WCHAR_CACHE */
         return NULL;
     }
 
     Py_BEGIN_ALLOW_THREADS
     rc = RegSetValueW(key, sub_key, REG_SZ, value, (DWORD)(value_length + 1));
     Py_END_ALLOW_THREADS
-#if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free(value);
-#endif /* USE_UNICODE_WCHAR_CACHE */
     if (rc != ERROR_SUCCESS)
         return PyErr_SetFromWindowsErrWithFunction(rc, "RegSetValue");
     Py_RETURN_NONE;

Python/dynload_win.c

@@ -225,11 +225,7 @@ dl_funcptr _PyImport_FindSharedFuncptrWindows(const char *prefix,
 
     _Py_CheckPython3();
 
-#if USE_UNICODE_WCHAR_CACHE
-    const wchar_t *wpathname = _PyUnicode_AsUnicode(pathname);
-#else /* USE_UNICODE_WCHAR_CACHE */
     wchar_t *wpathname = PyUnicode_AsWideCharString(pathname, NULL);
-#endif /* USE_UNICODE_WCHAR_CACHE */
     if (wpathname == NULL)
         return NULL;
 
@@ -251,9 +247,7 @@ dl_funcptr _PyImport_FindSharedFuncptrWindows(const char *prefix,
                               LOAD_LIBRARY_SEARCH_DEFAULT_DIRS |
                               LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR);
         Py_END_ALLOW_THREADS
-#if !USE_UNICODE_WCHAR_CACHE
         PyMem_Free(wpathname);
-#endif /* USE_UNICODE_WCHAR_CACHE */
 
         /* restore old error mode settings */
         SetErrorMode(old_mode);

Python/fileutils.c

@@ -1244,18 +1244,12 @@ _Py_stat(PyObject *path, struct stat *statbuf)
 #ifdef MS_WINDOWS
     int err;
 
-#if USE_UNICODE_WCHAR_CACHE
-    const wchar_t *wpath = _PyUnicode_AsUnicode(path);
-#else /* USE_UNICODE_WCHAR_CACHE */
     wchar_t *wpath = PyUnicode_AsWideCharString(path, NULL);
-#endif /* USE_UNICODE_WCHAR_CACHE */
     if (wpath == NULL)
         return -2;
 
     err = _Py_wstat(wpath, statbuf);
-#if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free(wpath);
-#endif /* USE_UNICODE_WCHAR_CACHE */
     return err;
 #else
     int ret;
@@ -1663,11 +1657,8 @@ _Py_fopen_obj(PyObject *path, const char *mode)
                      Py_TYPE(path));
         return NULL;
     }
-#if USE_UNICODE_WCHAR_CACHE
+
-    const wchar_t *wpath = _PyUnicode_AsUnicode(path);
-#else /* USE_UNICODE_WCHAR_CACHE */
     wchar_t *wpath = PyUnicode_AsWideCharString(path, NULL);
-#endif /* USE_UNICODE_WCHAR_CACHE */
     if (wpath == NULL)
         return NULL;
 
@@ -1675,9 +1666,7 @@ _Py_fopen_obj(PyObject *path, const char *mode)
                                 wmode, Py_ARRAY_LENGTH(wmode));
     if (usize == 0) {
         PyErr_SetFromWindowsErr(0);
-#if !USE_UNICODE_WCHAR_CACHE
         PyMem_Free(wpath);
-#endif /* USE_UNICODE_WCHAR_CACHE */
         return NULL;
     }
 
@@ -1687,9 +1676,7 @@ _Py_fopen_obj(PyObject *path, const char *mode)
         Py_END_ALLOW_THREADS
     } while (f == NULL
              && errno == EINTR && !(async_err = PyErr_CheckSignals()));
-#if !USE_UNICODE_WCHAR_CACHE
     PyMem_Free(wpath);
-#endif /* USE_UNICODE_WCHAR_CACHE */
 #else
     PyObject *bytes;
     const char *path_bytes;

Python/getargs.c

@@ -1012,58 +1012,6 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
         break;
     }
 
-    case 'u': /* raw unicode buffer (Py_UNICODE *) */
-    case 'Z': /* raw unicode buffer or None */
-    {
-        if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
-                "getargs: The '%c' format is deprecated. Use 'U' instead.", c)) {
-            return NULL;
-        }
-_Py_COMP_DIAG_PUSH
-_Py_COMP_DIAG_IGNORE_DEPR_DECLS
-        Py_UNICODE **p = va_arg(*p_va, Py_UNICODE **);
-
-        if (*format == '#') {
-            /* "u#" or "Z#" */
-            REQUIRE_PY_SSIZE_T_CLEAN;
-            Py_ssize_t *psize = va_arg(*p_va, Py_ssize_t*);
-
-            if (c == 'Z' && arg == Py_None) {
-                *p = NULL;
-                *psize = 0;
-            }
-            else if (PyUnicode_Check(arg)) {
-                Py_ssize_t len;
-                *p = PyUnicode_AsUnicodeAndSize(arg, &len);
-                if (*p == NULL)
-                    RETURN_ERR_OCCURRED;
-                *psize = len;
-            }
-            else
-                return converterr(c == 'Z' ? "str or None" : "str",
-                                  arg, msgbuf, bufsize);
-            format++;
-        } else {
-            /* "u" or "Z" */
-            if (c == 'Z' && arg == Py_None)
-                *p = NULL;
-            else if (PyUnicode_Check(arg)) {
-                Py_ssize_t len;
-                *p = PyUnicode_AsUnicodeAndSize(arg, &len);
-                if (*p == NULL)
-                    RETURN_ERR_OCCURRED;
-                if (wcslen(*p) != (size_t)len) {
-                    PyErr_SetString(PyExc_ValueError, "embedded null character");
-                    RETURN_ERR_OCCURRED;
-                }
-            } else
-                return converterr(c == 'Z' ? "str or None" : "str",
-                                  arg, msgbuf, bufsize);
-        }
-        break;
-_Py_COMP_DIAG_POP
-    }
-
     case 'e': {/* encoded string */
         char **buffer;
         const char *encoding;
@@ -2685,8 +2633,6 @@ skipitem(const char **p_format, va_list *p_va, int flags)
     case 's': /* string */
     case 'z': /* string or None */
     case 'y': /* bytes */
-    case 'u': /* unicode string */
-    case 'Z': /* unicode string or None */
     case 'w': /* buffer, read-write */
         {
             if (p_va != NULL) {

Python/traceback.c

@@ -1077,7 +1077,6 @@ _Py_DumpASCII(int fd, PyObject *text)
     int truncated;
     int kind;
     void *data = NULL;
-    wchar_t *wstr = NULL;
     Py_UCS4 ch;
 
     if (!PyUnicode_Check(text))
@@ -1085,13 +1084,7 @@ _Py_DumpASCII(int fd, PyObject *text)
 
     size = ascii->length;
     kind = ascii->state.kind;
-    if (kind == PyUnicode_WCHAR_KIND) {
+    if (ascii->state.compact) {
-        wstr = ascii->wstr;
-        if (wstr == NULL)
-            return;
-        size = _PyCompactUnicodeObject_CAST(text)->wstr_length;
-    }
-    else if (ascii->state.compact) {
         if (ascii->state.ascii)
             data = ascii + 1;
         else
@@ -1132,10 +1125,7 @@ _Py_DumpASCII(int fd, PyObject *text)
     }
 
     for (i=0; i < size; i++) {
-        if (kind != PyUnicode_WCHAR_KIND)
         ch = PyUnicode_READ(kind, data, i);
-        else
-            ch = wstr[i];
         if (' ' <= ch && ch <= 126) {
             /* printable ASCII character */
             char c = (char)ch;

Tools/clinic/clinic.py

@@ -3526,9 +3526,7 @@ class Py_UNICODE_converter(CConverter):
     def cleanup(self):
         if not self.length:
             return """\
-#if !USE_UNICODE_WCHAR_CACHE
 PyMem_Free((void *){name});
-#endif /* USE_UNICODE_WCHAR_CACHE */
 """.format(name=self.name)
 
     def parse_arg(self, argname, argnum):
@@ -3539,11 +3537,7 @@ PyMem_Free((void *){name});
                         _PyArg_BadArgument("{{name}}", {argnum}, "str", {argname});
                         goto exit;
                     }}}}
-                    #if USE_UNICODE_WCHAR_CACHE
-                    {paramname} = _PyUnicode_AsUnicode({argname});
-                    #else /* USE_UNICODE_WCHAR_CACHE */
                     {paramname} = PyUnicode_AsWideCharString({argname}, NULL);
-                    #endif /* USE_UNICODE_WCHAR_CACHE */
                     if ({paramname} == NULL) {{{{
                         goto exit;
                     }}}}
@@ -3554,11 +3548,7 @@ PyMem_Free((void *){name});
                         {paramname} = NULL;
                     }}}}
                     else if (PyUnicode_Check({argname})) {{{{
-                        #if USE_UNICODE_WCHAR_CACHE
-                        {paramname} = _PyUnicode_AsUnicode({argname});
-                        #else /* USE_UNICODE_WCHAR_CACHE */
                         {paramname} = PyUnicode_AsWideCharString({argname}, NULL);
-                        #endif /* USE_UNICODE_WCHAR_CACHE */
                         if ({paramname} == NULL) {{{{
                             goto exit;
                         }}}}

Tools/gdb/libpython.py

@@ -1376,17 +1376,10 @@ class PyUnicodeObjectPtr(PyObjectPtr):
         return _type_Py_UNICODE.sizeof
 
     def proxyval(self, visited):
-        may_have_surrogates = False
         compact = self.field('_base')
         ascii = compact['_base']
         state = ascii['state']
         is_compact_ascii = (int(state['ascii']) and int(state['compact']))
-        if not int(state['ready']):
-            # string is not ready
-            field_length = int(compact['wstr_length'])
-            may_have_surrogates = True
-            field_str = ascii['wstr']
-        else:
         field_length = int(ascii['length'])
         if is_compact_ascii:
             field_str = ascii.address + 1
@@ -1404,29 +1397,7 @@ class PyUnicodeObjectPtr(PyObjectPtr):
 
         # Gather a list of ints from the Py_UNICODE array; these are either
         # UCS-1, UCS-2 or UCS-4 code points:
-        if not may_have_surrogates:
         Py_UNICODEs = [int(field_str[i]) for i in safe_range(field_length)]
-        else:
-            # A more elaborate routine if sizeof(Py_UNICODE) is 2 in the
-            # inferior process: we must join surrogate pairs.
-            Py_UNICODEs = []
-            i = 0
-            limit = safety_limit(field_length)
-            while i < limit:
-                ucs = int(field_str[i])
-                i += 1
-                if ucs < 0xD800 or ucs >= 0xDC00 or i == field_length:
-                    Py_UNICODEs.append(ucs)
-                    continue
-                # This could be a surrogate pair.
-                ucs2 = int(field_str[i])
-                if ucs2 < 0xDC00 or ucs2 > 0xDFFF:
-                    continue
-                code = (ucs & 0x03FF) << 10
-                code |= ucs2 & 0x03FF
-                code += 0x00010000
-                Py_UNICODEs.append(code)
-                i += 1
 
         # Convert the int code points to unicode characters, and generate a
         # local unicode instance.

Tools/scripts/deepfreeze.py

@@ -200,7 +200,6 @@ class Printer:
                         self.write(".kind = 1,")
                         self.write(".compact = 1,")
                         self.write(".ascii = 1,")
-                        self.write(".ready = 1,")
                 self.write(f"._data = {make_string_literal(s.encode('ascii'))},")
                 return f"& {name}._ascii.ob_base"
             else:
@@ -213,21 +212,10 @@ class Printer:
                             self.write(f".kind = {kind},")
                             self.write(".compact = 1,")
                             self.write(".ascii = 0,")
-                            self.write(".ready = 1,")
                 with self.block(f"._data =", ","):
                     for i in range(0, len(s), 16):
                         data = s[i:i+16]
                         self.write(", ".join(map(str, map(ord, data))) + ",")
-                if kind == PyUnicode_2BYTE_KIND:
-                    self.patchups.append("if (sizeof(wchar_t) == 2) {")
-                    self.patchups.append(f"    {name}._compact._base.wstr = (wchar_t *) {name}._data;")
-                    self.patchups.append(f"    {name}._compact.wstr_length = {len(s)};")
-                    self.patchups.append("}")
-                if kind == PyUnicode_4BYTE_KIND:
-                    self.patchups.append("if (sizeof(wchar_t) == 4) {")
-                    self.patchups.append(f"    {name}._compact._base.wstr = (wchar_t *) {name}._data;")
-                    self.patchups.append(f"    {name}._compact.wstr_length = {len(s)};")
-                    self.patchups.append("}")
                 return f"& {name}._compact._base.ob_base"