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-rw-r--r--Doc/c-api/unicode.rst9
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diff --git a/Doc/c-api/unicode.rst b/Doc/c-api/unicode.rst
index 37e08d6..a74a73d 100644
--- a/Doc/c-api/unicode.rst
+++ b/Doc/c-api/unicode.rst
@@ -318,16 +318,25 @@ These APIs can be used for fast direct character conversions:
Return the character *ch* converted to lower case.
+ .. deprecated:: 3.3
+ This function uses simple case mappings.
+
.. c:function:: Py_UNICODE Py_UNICODE_TOUPPER(Py_UNICODE ch)
Return the character *ch* converted to upper case.
+ .. deprecated:: 3.3
+ This function uses simple case mappings.
+
.. c:function:: Py_UNICODE Py_UNICODE_TOTITLE(Py_UNICODE ch)
Return the character *ch* converted to title case.
+ .. deprecated:: 3.3
+ This function uses simple case mappings.
+
.. c:function:: int Py_UNICODE_TODECIMAL(Py_UNICODE ch)