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