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-rw-r--r--src/unicode/digit.go13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/unicode/digit.go b/src/unicode/digit.go
new file mode 100644
index 0000000..53171b3
--- /dev/null
+++ b/src/unicode/digit.go
@@ -0,0 +1,13 @@
+// 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)
+}