python/src/Python/formatter_unicode.c

/* Implements the unicode (as opposed to string) version of the
   built-in formatter for unicode.  That is, unicode.__format__(). */

#include "Python.h"
#include "../Objects/stringlib/unicodedefs.h"

#define FORMAT_STRING _PyUnicode_FormatAdvanced

/* don't define FORMAT_LONG and FORMAT_FLOAT, since we can live
   with only the string versions of those.  The builtin format()
   will convert them to unicode. */

#include "../Objects/stringlib/formatter.h"