1// Copyright 2009 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package unicode
6
7// IsDigit reports whether the rune is a decimal digit.
8func IsDigit(r rune) bool {
9	if r <= MaxLatin1 {
10		return '0' <= r && r <= '9'
11	}
12	return isExcludingLatin(Digit, r)
13}
14