1 // Copyright 2010 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.
11 // isTSpecial returns true if rune is in 'tspecials' as defined by RFC
13 func isTSpecial(r rune
) bool {
14 return strings
.IndexRune(`()<>@,;:\"/[]?=`, r
) != -1
17 // isTokenChar returns true if rune is in 'token' as defined by RFC
19 func isTokenChar(r rune
) bool {
20 // token := 1*<any (US-ASCII) CHAR except SPACE, CTLs,
22 return r
> 0x20 && r
< 0x7f && !isTSpecial(r
)
25 // isToken returns true if s is a 'token' as defined by RFC 1521
27 func isToken(s
string) bool {
31 return strings
.IndexFunc(s
, isNotTokenChar
) < 0