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diff --git a/lib/c32isdigit.c b/lib/c32isdigit.c
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+/* Test 32-bit wide character for being a digit.
+ Copyright (C) 2020-2024 Free Software Foundation, Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ This file is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#define IN_C32ISDIGIT
+/* Specification. */
+#include <uchar.h>
+
+#define FUNC c32isdigit
+#define WCHAR_FUNC iswdigit
+#define UCS_FUNC uc_is_digit
+#include "c32is-impl.h"