35 lines
796 B
Go
35 lines
796 B
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build ignore
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package main
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// elem is an entry of the width trie. The high byte is used to encode the type
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// of the rune. The low byte is used to store the index to a mapping entry in
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// the inverseData array.
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type elem uint16
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const (
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tagNeutral elem = iota << typeShift
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tagAmbiguous
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tagWide
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tagNarrow
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tagFullwidth
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tagHalfwidth
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)
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const (
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numTypeBits = 3
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typeShift = 16 - numTypeBits
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// tagNeedsFold is true for all fullwidth and halfwidth runes except for
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// the Won sign U+20A9.
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tagNeedsFold = 0x1000
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// The Korean Won sign is halfwidth, but SHOULD NOT be mapped to a wide
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// variant.
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wonSign rune = 0x20A9
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)
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