1 // Copyright 2015 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.
9 // elem is an entry of the width trie. The high byte is used to encode the type
10 // of the rune. The low byte is used to store the index to a mapping entry in
11 // the inverseData array.
15 tagNeutral elem = iota << typeShift
25 typeShift = 16 - numTypeBits
27 // tagNeedsFold is true for all fullwidth and halfwidth runes except for
28 // the Won sign U+20A9.
31 // The Korean Won sign is halfwidth, but SHOULD NOT be mapped to a wide