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 5 package unicode 6 7 // IsDigit reports whether the rune is a decimal digit. 8 func IsDigit(r rune) bool { 9 if r <= MaxLatin1 { 10 return '0' <= r && r <= '9' 11 } 12 return isExcludingLatin(Digit, r) 13 } 14
