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// Copyright 2015 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.
//go:build ignore
// +build ignore
package main
// entry is the entry of a trie table
// 7..6 property (unassigned, disallowed, maybe, valid)
// 5..0 category
type entry uint8
const (
propShift = 6
propMask = 0xc0
catMask = 0x3f
)
func (e entry) property() property { return property(e & propMask) }
func (e entry) category() category { return category(e & catMask) }
type property uint8
// The order of these constants matter. A Profile may consider runes to be
// allowed either from pValid or idDisOrFreePVal.
const (
unassigned property = iota << propShift
disallowed
idDisOrFreePVal // disallowed for Identifier, pValid for FreeForm
pValid
)
// compute permutations of all properties and specialCategories.
type category uint8
const (
other category = iota
// Special rune types
joiningL
joiningD
joiningT
joiningR
viramaModifier
viramaJoinT // Virama + JoiningT
latinSmallL // U+006c
greek
greekJoinT // Greek + JoiningT
hebrew
hebrewJoinT // Hebrew + JoiningT
japanese // hirigana, katakana, han
// Special rune types associated with contextual rules defined in
// https://tools.ietf.org/html/rfc5892#appendix-A.
// ContextO
zeroWidthNonJoiner // rule 1
zeroWidthJoiner // rule 2
// ContextJ
middleDot // rule 3
greekLowerNumeralSign // rule 4
hebrewPreceding // rule 5 and 6
katakanaMiddleDot // rule 7
arabicIndicDigit // rule 8
extendedArabicIndicDigit // rule 9
numCategories
)