[Python-Dev] New Py_UNICODE doc

[Fredrik Lundh]

Thomas Heller wrote:

> AFAIK, you can configure Python to use 16-bits or 32-bits Unicode chars,
> independend from the size of wchar_t.  The HAVE_USABLE_WCHAR_T macro
> can be used by extension writers to determine if Py_UNICODE is the same as
> wchar_t.

note that "usable" is more than just "same size"; it also implies that widechar
predicates (iswalnum etc) works properly with Unicode characters, under all
locales.

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