Plan 9 from Bell Labs’s /n/sources/contrib/ericvh/go-plan9/src/pkg/unicode/digit.go

Copyright © 2009 Alcatel-Lucent.
Distributed under the Lucent Public License version 1.02.
Download the Plan 9 distribution.


// 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(rune int) bool {
	if rune < 0x100 {	// quick ASCII (Latin-1, really) check
		return '0' <= rune && rune <= '9'
	}
	return Is(Digit, rune);
}

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