--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/github.com/dlclark/regexp2/syntax/charclass.go	Sun Jul 23 13:18:53 2023 +0000
@@ -0,0 +1,854 @@
+package syntax
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"sort"
+	"unicode"
+	"unicode/utf8"
+)
+
+// CharSet combines start-end rune ranges and unicode categories representing a set of characters
+type CharSet struct {
+	ranges     []singleRange
+	categories []category
+	sub        *CharSet //optional subtractor
+	negate     bool
+	anything   bool
+}
+
+type category struct {
+	negate bool
+	cat    string
+}
+
+type singleRange struct {
+	first rune
+	last  rune
+}
+
+const (
+	spaceCategoryText = " "
+	wordCategoryText  = "W"
+)
+
+var (
+	ecmaSpace = []rune{0x0009, 0x000e, 0x0020, 0x0021, 0x00a0, 0x00a1, 0x1680, 0x1681, 0x2000, 0x200b, 0x2028, 0x202a, 0x202f, 0x2030, 0x205f, 0x2060, 0x3000, 0x3001, 0xfeff, 0xff00}
+	ecmaWord  = []rune{0x0030, 0x003a, 0x0041, 0x005b, 0x005f, 0x0060, 0x0061, 0x007b}
+	ecmaDigit = []rune{0x0030, 0x003a}
+)
+
+var (
+	AnyClass          = getCharSetFromOldString([]rune{0}, false)
+	ECMAAnyClass      = getCharSetFromOldString([]rune{0, 0x000a, 0x000b, 0x000d, 0x000e}, false)
+	NoneClass         = getCharSetFromOldString(nil, false)
+	ECMAWordClass     = getCharSetFromOldString(ecmaWord, false)
+	NotECMAWordClass  = getCharSetFromOldString(ecmaWord, true)
+	ECMASpaceClass    = getCharSetFromOldString(ecmaSpace, false)
+	NotECMASpaceClass = getCharSetFromOldString(ecmaSpace, true)
+	ECMADigitClass    = getCharSetFromOldString(ecmaDigit, false)
+	NotECMADigitClass = getCharSetFromOldString(ecmaDigit, true)
+
+	WordClass     = getCharSetFromCategoryString(false, false, wordCategoryText)
+	NotWordClass  = getCharSetFromCategoryString(true, false, wordCategoryText)
+	SpaceClass    = getCharSetFromCategoryString(false, false, spaceCategoryText)
+	NotSpaceClass = getCharSetFromCategoryString(true, false, spaceCategoryText)
+	DigitClass    = getCharSetFromCategoryString(false, false, "Nd")
+	NotDigitClass = getCharSetFromCategoryString(false, true, "Nd")
+)
+
+var unicodeCategories = func() map[string]*unicode.RangeTable {
+	retVal := make(map[string]*unicode.RangeTable)
+	for k, v := range unicode.Scripts {
+		retVal[k] = v
+	}
+	for k, v := range unicode.Categories {
+		retVal[k] = v
+	}
+	for k, v := range unicode.Properties {
+		retVal[k] = v
+	}
+	return retVal
+}()
+
+func getCharSetFromCategoryString(negateSet bool, negateCat bool, cats ...string) func() *CharSet {
+	if negateCat && negateSet {
+		panic("BUG!  You should only negate the set OR the category in a constant setup, but not both")
+	}
+
+	c := CharSet{negate: negateSet}
+
+	c.categories = make([]category, len(cats))
+	for i, cat := range cats {
+		c.categories[i] = category{cat: cat, negate: negateCat}
+	}
+	return func() *CharSet {
+		//make a copy each time
+		local := c
+		//return that address
+		return &local
+	}
+}
+
+func getCharSetFromOldString(setText []rune, negate bool) func() *CharSet {
+	c := CharSet{}
+	if len(setText) > 0 {
+		fillFirst := false
+		l := len(setText)
+		if negate {
+			if setText[0] == 0 {
+				setText = setText[1:]
+			} else {
+				l++
+				fillFirst = true
+			}
+		}
+
+		if l%2 == 0 {
+			c.ranges = make([]singleRange, l/2)
+		} else {
+			c.ranges = make([]singleRange, l/2+1)
+		}
+
+		first := true
+		if fillFirst {
+			c.ranges[0] = singleRange{first: 0}
+			first = false
+		}
+
+		i := 0
+		for _, r := range setText {
+			if first {
+				// lower bound in a new range
+				c.ranges[i] = singleRange{first: r}
+				first = false
+			} else {
+				c.ranges[i].last = r - 1
+				i++
+				first = true
+			}
+		}
+		if !first {
+			c.ranges[i].last = utf8.MaxRune
+		}
+	}
+
+	return func() *CharSet {
+		local := c
+		return &local
+	}
+}
+
+// Copy makes a deep copy to prevent accidental mutation of a set
+func (c CharSet) Copy() CharSet {
+	ret := CharSet{
+		anything: c.anything,
+		negate:   c.negate,
+	}
+
+	ret.ranges = append(ret.ranges, c.ranges...)
+	ret.categories = append(ret.categories, c.categories...)
+
+	if c.sub != nil {
+		sub := c.sub.Copy()
+		ret.sub = &sub
+	}
+
+	return ret
+}
+
+// gets a human-readable description for a set string
+func (c CharSet) String() string {
+	buf := &bytes.Buffer{}
+	buf.WriteRune('[')
+
+	if c.IsNegated() {
+		buf.WriteRune('^')
+	}
+
+	for _, r := range c.ranges {
+
+		buf.WriteString(CharDescription(r.first))
+		if r.first != r.last {
+			if r.last-r.first != 1 {
+				//groups that are 1 char apart skip the dash
+				buf.WriteRune('-')
+			}
+			buf.WriteString(CharDescription(r.last))
+		}
+	}
+
+	for _, c := range c.categories {
+		buf.WriteString(c.String())
+	}
+
+	if c.sub != nil {
+		buf.WriteRune('-')
+		buf.WriteString(c.sub.String())
+	}
+
+	buf.WriteRune(']')
+
+	return buf.String()
+}
+
+// mapHashFill converts a charset into a buffer for use in maps
+func (c CharSet) mapHashFill(buf *bytes.Buffer) {
+	if c.negate {
+		buf.WriteByte(0)
+	} else {
+		buf.WriteByte(1)
+	}
+
+	binary.Write(buf, binary.LittleEndian, len(c.ranges))
+	binary.Write(buf, binary.LittleEndian, len(c.categories))
+	for _, r := range c.ranges {
+		buf.WriteRune(r.first)
+		buf.WriteRune(r.last)
+	}
+	for _, ct := range c.categories {
+		buf.WriteString(ct.cat)
+		if ct.negate {
+			buf.WriteByte(1)
+		} else {
+			buf.WriteByte(0)
+		}
+	}
+
+	if c.sub != nil {
+		c.sub.mapHashFill(buf)
+	}
+}
+
+// CharIn returns true if the rune is in our character set (either ranges or categories).
+// It handles negations and subtracted sub-charsets.
+func (c CharSet) CharIn(ch rune) bool {
+	val := false
+	// in s && !s.subtracted
+
+	//check ranges
+	for _, r := range c.ranges {
+		if ch < r.first {
+			continue
+		}
+		if ch <= r.last {
+			val = true
+			break
+		}
+	}
+
+	//check categories if we haven't already found a range
+	if !val && len(c.categories) > 0 {
+		for _, ct := range c.categories {
+			// special categories...then unicode
+			if ct.cat == spaceCategoryText {
+				if unicode.IsSpace(ch) {
+					// we found a space so we're done
+					// negate means this is a "bad" thing
+					val = !ct.negate
+					break
+				} else if ct.negate {
+					val = true
+					break
+				}
+			} else if ct.cat == wordCategoryText {
+				if IsWordChar(ch) {
+					val = !ct.negate
+					break
+				} else if ct.negate {
+					val = true
+					break
+				}
+			} else if unicode.Is(unicodeCategories[ct.cat], ch) {
+				// if we're in this unicode category then we're done
+				// if negate=true on this category then we "failed" our test
+				// otherwise we're good that we found it
+				val = !ct.negate
+				break
+			} else if ct.negate {
+				val = true
+				break
+			}
+		}
+	}
+
+	// negate the whole char set
+	if c.negate {
+		val = !val
+	}
+
+	// get subtracted recurse
+	if val && c.sub != nil {
+		val = !c.sub.CharIn(ch)
+	}
+
+	//log.Printf("Char '%v' in %v == %v", string(ch), c.String(), val)
+	return val
+}
+
+func (c category) String() string {
+	switch c.cat {
+	case spaceCategoryText:
+		if c.negate {
+			return "\\S"
+		}
+		return "\\s"
+	case wordCategoryText:
+		if c.negate {
+			return "\\W"
+		}
+		return "\\w"
+	}
+	if _, ok := unicodeCategories[c.cat]; ok {
+
+		if c.negate {
+			return "\\P{" + c.cat + "}"
+		}
+		return "\\p{" + c.cat + "}"
+	}
+	return "Unknown category: " + c.cat
+}
+
+// CharDescription Produces a human-readable description for a single character.
+func CharDescription(ch rune) string {
+	/*if ch == '\\' {
+		return "\\\\"
+	}
+
+	if ch > ' ' && ch <= '~' {
+		return string(ch)
+	} else if ch == '\n' {
+		return "\\n"
+	} else if ch == ' ' {
+		return "\\ "
+	}*/
+
+	b := &bytes.Buffer{}
+	escape(b, ch, false) //fmt.Sprintf("%U", ch)
+	return b.String()
+}
+
+// According to UTS#18 Unicode Regular Expressions (http://www.unicode.org/reports/tr18/)
+// RL 1.4 Simple Word Boundaries  The class of <word_character> includes all Alphabetic
+// values from the Unicode character database, from UnicodeData.txt [UData], plus the U+200C
+// ZERO WIDTH NON-JOINER and U+200D ZERO WIDTH JOINER.
+func IsWordChar(r rune) bool {
+	//"L", "Mn", "Nd", "Pc"
+	return unicode.In(r,
+		unicode.Categories["L"], unicode.Categories["Mn"],
+		unicode.Categories["Nd"], unicode.Categories["Pc"]) || r == '\u200D' || r == '\u200C'
+	//return 'A' <= r && r <= 'Z' || 'a' <= r && r <= 'z' || '0' <= r && r <= '9' || r == '_'
+}
+
+func IsECMAWordChar(r rune) bool {
+	return unicode.In(r,
+		unicode.Categories["L"], unicode.Categories["Mn"],
+		unicode.Categories["Nd"], unicode.Categories["Pc"])
+
+	//return 'A' <= r && r <= 'Z' || 'a' <= r && r <= 'z' || '0' <= r && r <= '9' || r == '_'
+}
+
+// SingletonChar will return the char from the first range without validation.
+// It assumes you have checked for IsSingleton or IsSingletonInverse and will panic given bad input
+func (c CharSet) SingletonChar() rune {
+	return c.ranges[0].first
+}
+
+func (c CharSet) IsSingleton() bool {
+	return !c.negate && //negated is multiple chars
+		len(c.categories) == 0 && len(c.ranges) == 1 && // multiple ranges and unicode classes represent multiple chars
+		c.sub == nil && // subtraction means we've got multiple chars
+		c.ranges[0].first == c.ranges[0].last // first and last equal means we're just 1 char
+}
+
+func (c CharSet) IsSingletonInverse() bool {
+	return c.negate && //same as above, but requires negated
+		len(c.categories) == 0 && len(c.ranges) == 1 && // multiple ranges and unicode classes represent multiple chars
+		c.sub == nil && // subtraction means we've got multiple chars
+		c.ranges[0].first == c.ranges[0].last // first and last equal means we're just 1 char
+}
+
+func (c CharSet) IsMergeable() bool {
+	return !c.IsNegated() && !c.HasSubtraction()
+}
+
+func (c CharSet) IsNegated() bool {
+	return c.negate
+}
+
+func (c CharSet) HasSubtraction() bool {
+	return c.sub != nil
+}
+
+func (c CharSet) IsEmpty() bool {
+	return len(c.ranges) == 0 && len(c.categories) == 0 && c.sub == nil
+}
+
+func (c *CharSet) addDigit(ecma, negate bool, pattern string) {
+	if ecma {
+		if negate {
+			c.addRanges(NotECMADigitClass().ranges)
+		} else {
+			c.addRanges(ECMADigitClass().ranges)
+		}
+	} else {
+		c.addCategories(category{cat: "Nd", negate: negate})
+	}
+}
+
+func (c *CharSet) addChar(ch rune) {
+	c.addRange(ch, ch)
+}
+
+func (c *CharSet) addSpace(ecma, negate bool) {
+	if ecma {
+		if negate {
+			c.addRanges(NotECMASpaceClass().ranges)
+		} else {
+			c.addRanges(ECMASpaceClass().ranges)
+		}
+	} else {
+		c.addCategories(category{cat: spaceCategoryText, negate: negate})
+	}
+}
+
+func (c *CharSet) addWord(ecma, negate bool) {
+	if ecma {
+		if negate {
+			c.addRanges(NotECMAWordClass().ranges)
+		} else {
+			c.addRanges(ECMAWordClass().ranges)
+		}
+	} else {
+		c.addCategories(category{cat: wordCategoryText, negate: negate})
+	}
+}
+
+// Add set ranges and categories into ours -- no deduping or anything
+func (c *CharSet) addSet(set CharSet) {
+	if c.anything {
+		return
+	}
+	if set.anything {
+		c.makeAnything()
+		return
+	}
+	// just append here to prevent double-canon
+	c.ranges = append(c.ranges, set.ranges...)
+	c.addCategories(set.categories...)
+	c.canonicalize()
+}
+
+func (c *CharSet) makeAnything() {
+	c.anything = true
+	c.categories = []category{}
+	c.ranges = AnyClass().ranges
+}
+
+func (c *CharSet) addCategories(cats ...category) {
+	// don't add dupes and remove positive+negative
+	if c.anything {
+		// if we've had a previous positive+negative group then
+		// just return, we're as broad as we can get
+		return
+	}
+
+	for _, ct := range cats {
+		found := false
+		for _, ct2 := range c.categories {
+			if ct.cat == ct2.cat {
+				if ct.negate != ct2.negate {
+					// oposite negations...this mean we just
+					// take us as anything and move on
+					c.makeAnything()
+					return
+				}
+				found = true
+				break
+			}
+		}
+
+		if !found {
+			c.categories = append(c.categories, ct)
+		}
+	}
+}
+
+// Merges new ranges to our own
+func (c *CharSet) addRanges(ranges []singleRange) {
+	if c.anything {
+		return
+	}
+	c.ranges = append(c.ranges, ranges...)
+	c.canonicalize()
+}
+
+// Merges everything but the new ranges into our own
+func (c *CharSet) addNegativeRanges(ranges []singleRange) {
+	if c.anything {
+		return
+	}
+
+	var hi rune
+
+	// convert incoming ranges into opposites, assume they are in order
+	for _, r := range ranges {
+		if hi < r.first {
+			c.ranges = append(c.ranges, singleRange{hi, r.first - 1})
+		}
+		hi = r.last + 1
+	}
+
+	if hi < utf8.MaxRune {
+		c.ranges = append(c.ranges, singleRange{hi, utf8.MaxRune})
+	}
+
+	c.canonicalize()
+}
+
+func isValidUnicodeCat(catName string) bool {
+	_, ok := unicodeCategories[catName]
+	return ok
+}
+
+func (c *CharSet) addCategory(categoryName string, negate, caseInsensitive bool, pattern string) {
+	if !isValidUnicodeCat(categoryName) {
+		// unknown unicode category, script, or property "blah"
+		panic(fmt.Errorf("Unknown unicode category, script, or property '%v'", categoryName))
+
+	}
+
+	if caseInsensitive && (categoryName == "Ll" || categoryName == "Lu" || categoryName == "Lt") {
+		// when RegexOptions.IgnoreCase is specified then {Ll} {Lu} and {Lt} cases should all match
+		c.addCategories(
+			category{cat: "Ll", negate: negate},
+			category{cat: "Lu", negate: negate},
+			category{cat: "Lt", negate: negate})
+	}
+	c.addCategories(category{cat: categoryName, negate: negate})
+}
+
+func (c *CharSet) addSubtraction(sub *CharSet) {
+	c.sub = sub
+}
+
+func (c *CharSet) addRange(chMin, chMax rune) {
+	c.ranges = append(c.ranges, singleRange{first: chMin, last: chMax})
+	c.canonicalize()
+}
+
+func (c *CharSet) addNamedASCII(name string, negate bool) bool {
+	var rs []singleRange
+
+	switch name {
+	case "alnum":
+		rs = []singleRange{singleRange{'0', '9'}, singleRange{'A', 'Z'}, singleRange{'a', 'z'}}
+	case "alpha":
+		rs = []singleRange{singleRange{'A', 'Z'}, singleRange{'a', 'z'}}
+	case "ascii":
+		rs = []singleRange{singleRange{0, 0x7f}}
+	case "blank":
+		rs = []singleRange{singleRange{'\t', '\t'}, singleRange{' ', ' '}}
+	case "cntrl":
+		rs = []singleRange{singleRange{0, 0x1f}, singleRange{0x7f, 0x7f}}
+	case "digit":
+		c.addDigit(false, negate, "")
+	case "graph":
+		rs = []singleRange{singleRange{'!', '~'}}
+	case "lower":
+		rs = []singleRange{singleRange{'a', 'z'}}
+	case "print":
+		rs = []singleRange{singleRange{' ', '~'}}
+	case "punct": //[!-/:-@[-`{-~]
+		rs = []singleRange{singleRange{'!', '/'}, singleRange{':', '@'}, singleRange{'[', '`'}, singleRange{'{', '~'}}
+	case "space":
+		c.addSpace(true, negate)
+	case "upper":
+		rs = []singleRange{singleRange{'A', 'Z'}}
+	case "word":
+		c.addWord(true, negate)
+	case "xdigit":
+		rs = []singleRange{singleRange{'0', '9'}, singleRange{'A', 'F'}, singleRange{'a', 'f'}}
+	default:
+		return false
+	}
+
+	if len(rs) > 0 {
+		if negate {
+			c.addNegativeRanges(rs)
+		} else {
+			c.addRanges(rs)
+		}
+	}
+
+	return true
+}
+
+type singleRangeSorter []singleRange
+
+func (p singleRangeSorter) Len() int           { return len(p) }
+func (p singleRangeSorter) Less(i, j int) bool { return p[i].first < p[j].first }
+func (p singleRangeSorter) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
+
+// Logic to reduce a character class to a unique, sorted form.
+func (c *CharSet) canonicalize() {
+	var i, j int
+	var last rune
+
+	//
+	// Find and eliminate overlapping or abutting ranges
+	//
+
+	if len(c.ranges) > 1 {
+		sort.Sort(singleRangeSorter(c.ranges))
+
+		done := false
+
+		for i, j = 1, 0; ; i++ {
+			for last = c.ranges[j].last; ; i++ {
+				if i == len(c.ranges) || last == utf8.MaxRune {
+					done = true
+					break
+				}
+
+				CurrentRange := c.ranges[i]
+				if CurrentRange.first > last+1 {
+					break
+				}
+
+				if last < CurrentRange.last {
+					last = CurrentRange.last
+				}
+			}
+
+			c.ranges[j] = singleRange{first: c.ranges[j].first, last: last}
+
+			j++
+
+			if done {
+				break
+			}
+
+			if j < i {
+				c.ranges[j] = c.ranges[i]
+			}
+		}
+
+		c.ranges = append(c.ranges[:j], c.ranges[len(c.ranges):]...)
+	}
+}
+
+// Adds to the class any lowercase versions of characters already
+// in the class. Used for case-insensitivity.
+func (c *CharSet) addLowercase() {
+	if c.anything {
+		return
+	}
+	toAdd := []singleRange{}
+	for i := 0; i < len(c.ranges); i++ {
+		r := c.ranges[i]
+		if r.first == r.last {
+			lower := unicode.ToLower(r.first)
+			c.ranges[i] = singleRange{first: lower, last: lower}
+		} else {
+			toAdd = append(toAdd, r)
+		}
+	}
+
+	for _, r := range toAdd {
+		c.addLowercaseRange(r.first, r.last)
+	}
+	c.canonicalize()
+}
+
+/**************************************************************************
+    Let U be the set of Unicode character values and let L be the lowercase
+    function, mapping from U to U. To perform case insensitive matching of
+    character sets, we need to be able to map an interval I in U, say
+
+        I = [chMin, chMax] = { ch : chMin <= ch <= chMax }
+
+    to a set A such that A contains L(I) and A is contained in the union of
+    I and L(I).
+
+    The table below partitions U into intervals on which L is non-decreasing.
+    Thus, for any interval J = [a, b] contained in one of these intervals,
+    L(J) is contained in [L(a), L(b)].
+
+    It is also true that for any such J, [L(a), L(b)] is contained in the
+    union of J and L(J). This does not follow from L being non-decreasing on
+    these intervals. It follows from the nature of the L on each interval.
+    On each interval, L has one of the following forms:
+
+        (1) L(ch) = constant            (LowercaseSet)
+        (2) L(ch) = ch + offset         (LowercaseAdd)
+        (3) L(ch) = ch | 1              (LowercaseBor)
+        (4) L(ch) = ch + (ch & 1)       (LowercaseBad)
+
+    It is easy to verify that for any of these forms [L(a), L(b)] is
+    contained in the union of [a, b] and L([a, b]).
+***************************************************************************/
+
+const (
+	LowercaseSet = 0 // Set to arg.
+	LowercaseAdd = 1 // Add arg.
+	LowercaseBor = 2 // Bitwise or with 1.
+	LowercaseBad = 3 // Bitwise and with 1 and add original.
+)
+
+type lcMap struct {
+	chMin, chMax rune
+	op, data     int32
+}
+
+var lcTable = []lcMap{
+	lcMap{'\u0041', '\u005A', LowercaseAdd, 32},
+	lcMap{'\u00C0', '\u00DE', LowercaseAdd, 32},
+	lcMap{'\u0100', '\u012E', LowercaseBor, 0},
+	lcMap{'\u0130', '\u0130', LowercaseSet, 0x0069},
+	lcMap{'\u0132', '\u0136', LowercaseBor, 0},
+	lcMap{'\u0139', '\u0147', LowercaseBad, 0},
+	lcMap{'\u014A', '\u0176', LowercaseBor, 0},
+	lcMap{'\u0178', '\u0178', LowercaseSet, 0x00FF},
+	lcMap{'\u0179', '\u017D', LowercaseBad, 0},
+	lcMap{'\u0181', '\u0181', LowercaseSet, 0x0253},
+	lcMap{'\u0182', '\u0184', LowercaseBor, 0},
+	lcMap{'\u0186', '\u0186', LowercaseSet, 0x0254},
+	lcMap{'\u0187', '\u0187', LowercaseSet, 0x0188},
+	lcMap{'\u0189', '\u018A', LowercaseAdd, 205},
+	lcMap{'\u018B', '\u018B', LowercaseSet, 0x018C},
+	lcMap{'\u018E', '\u018E', LowercaseSet, 0x01DD},
+	lcMap{'\u018F', '\u018F', LowercaseSet, 0x0259},
+	lcMap{'\u0190', '\u0190', LowercaseSet, 0x025B},
+	lcMap{'\u0191', '\u0191', LowercaseSet, 0x0192},
+	lcMap{'\u0193', '\u0193', LowercaseSet, 0x0260},
+	lcMap{'\u0194', '\u0194', LowercaseSet, 0x0263},
+	lcMap{'\u0196', '\u0196', LowercaseSet, 0x0269},
+	lcMap{'\u0197', '\u0197', LowercaseSet, 0x0268},
+	lcMap{'\u0198', '\u0198', LowercaseSet, 0x0199},
+	lcMap{'\u019C', '\u019C', LowercaseSet, 0x026F},
+	lcMap{'\u019D', '\u019D', LowercaseSet, 0x0272},
+	lcMap{'\u019F', '\u019F', LowercaseSet, 0x0275},
+	lcMap{'\u01A0', '\u01A4', LowercaseBor, 0},
+	lcMap{'\u01A7', '\u01A7', LowercaseSet, 0x01A8},
+	lcMap{'\u01A9', '\u01A9', LowercaseSet, 0x0283},
+	lcMap{'\u01AC', '\u01AC', LowercaseSet, 0x01AD},
+	lcMap{'\u01AE', '\u01AE', LowercaseSet, 0x0288},
+	lcMap{'\u01AF', '\u01AF', LowercaseSet, 0x01B0},
+	lcMap{'\u01B1', '\u01B2', LowercaseAdd, 217},
+	lcMap{'\u01B3', '\u01B5', LowercaseBad, 0},
+	lcMap{'\u01B7', '\u01B7', LowercaseSet, 0x0292},
+	lcMap{'\u01B8', '\u01B8', LowercaseSet, 0x01B9},
+	lcMap{'\u01BC', '\u01BC', LowercaseSet, 0x01BD},
+	lcMap{'\u01C4', '\u01C5', LowercaseSet, 0x01C6},
+	lcMap{'\u01C7', '\u01C8', LowercaseSet, 0x01C9},
+	lcMap{'\u01CA', '\u01CB', LowercaseSet, 0x01CC},
+	lcMap{'\u01CD', '\u01DB', LowercaseBad, 0},
+	lcMap{'\u01DE', '\u01EE', LowercaseBor, 0},
+	lcMap{'\u01F1', '\u01F2', LowercaseSet, 0x01F3},
+	lcMap{'\u01F4', '\u01F4', LowercaseSet, 0x01F5},
+	lcMap{'\u01FA', '\u0216', LowercaseBor, 0},
+	lcMap{'\u0386', '\u0386', LowercaseSet, 0x03AC},
+	lcMap{'\u0388', '\u038A', LowercaseAdd, 37},
+	lcMap{'\u038C', '\u038C', LowercaseSet, 0x03CC},
+	lcMap{'\u038E', '\u038F', LowercaseAdd, 63},
+	lcMap{'\u0391', '\u03AB', LowercaseAdd, 32},
+	lcMap{'\u03E2', '\u03EE', LowercaseBor, 0},
+	lcMap{'\u0401', '\u040F', LowercaseAdd, 80},
+	lcMap{'\u0410', '\u042F', LowercaseAdd, 32},
+	lcMap{'\u0460', '\u0480', LowercaseBor, 0},
+	lcMap{'\u0490', '\u04BE', LowercaseBor, 0},
+	lcMap{'\u04C1', '\u04C3', LowercaseBad, 0},
+	lcMap{'\u04C7', '\u04C7', LowercaseSet, 0x04C8},
+	lcMap{'\u04CB', '\u04CB', LowercaseSet, 0x04CC},
+	lcMap{'\u04D0', '\u04EA', LowercaseBor, 0},
+	lcMap{'\u04EE', '\u04F4', LowercaseBor, 0},
+	lcMap{'\u04F8', '\u04F8', LowercaseSet, 0x04F9},
+	lcMap{'\u0531', '\u0556', LowercaseAdd, 48},
+	lcMap{'\u10A0', '\u10C5', LowercaseAdd, 48},
+	lcMap{'\u1E00', '\u1EF8', LowercaseBor, 0},
+	lcMap{'\u1F08', '\u1F0F', LowercaseAdd, -8},
+	lcMap{'\u1F18', '\u1F1F', LowercaseAdd, -8},
+	lcMap{'\u1F28', '\u1F2F', LowercaseAdd, -8},
+	lcMap{'\u1F38', '\u1F3F', LowercaseAdd, -8},
+	lcMap{'\u1F48', '\u1F4D', LowercaseAdd, -8},
+	lcMap{'\u1F59', '\u1F59', LowercaseSet, 0x1F51},
+	lcMap{'\u1F5B', '\u1F5B', LowercaseSet, 0x1F53},
+	lcMap{'\u1F5D', '\u1F5D', LowercaseSet, 0x1F55},
+	lcMap{'\u1F5F', '\u1F5F', LowercaseSet, 0x1F57},
+	lcMap{'\u1F68', '\u1F6F', LowercaseAdd, -8},
+	lcMap{'\u1F88', '\u1F8F', LowercaseAdd, -8},
+	lcMap{'\u1F98', '\u1F9F', LowercaseAdd, -8},
+	lcMap{'\u1FA8', '\u1FAF', LowercaseAdd, -8},
+	lcMap{'\u1FB8', '\u1FB9', LowercaseAdd, -8},
+	lcMap{'\u1FBA', '\u1FBB', LowercaseAdd, -74},
+	lcMap{'\u1FBC', '\u1FBC', LowercaseSet, 0x1FB3},
+	lcMap{'\u1FC8', '\u1FCB', LowercaseAdd, -86},
+	lcMap{'\u1FCC', '\u1FCC', LowercaseSet, 0x1FC3},
+	lcMap{'\u1FD8', '\u1FD9', LowercaseAdd, -8},
+	lcMap{'\u1FDA', '\u1FDB', LowercaseAdd, -100},
+	lcMap{'\u1FE8', '\u1FE9', LowercaseAdd, -8},
+	lcMap{'\u1FEA', '\u1FEB', LowercaseAdd, -112},
+	lcMap{'\u1FEC', '\u1FEC', LowercaseSet, 0x1FE5},
+	lcMap{'\u1FF8', '\u1FF9', LowercaseAdd, -128},
+	lcMap{'\u1FFA', '\u1FFB', LowercaseAdd, -126},
+	lcMap{'\u1FFC', '\u1FFC', LowercaseSet, 0x1FF3},
+	lcMap{'\u2160', '\u216F', LowercaseAdd, 16},
+	lcMap{'\u24B6', '\u24D0', LowercaseAdd, 26},
+	lcMap{'\uFF21', '\uFF3A', LowercaseAdd, 32},
+}
+
+func (c *CharSet) addLowercaseRange(chMin, chMax rune) {
+	var i, iMax, iMid int
+	var chMinT, chMaxT rune
+	var lc lcMap
+
+	for i, iMax = 0, len(lcTable); i < iMax; {
+		iMid = (i + iMax) / 2
+		if lcTable[iMid].chMax < chMin {
+			i = iMid + 1
+		} else {
+			iMax = iMid
+		}
+	}
+
+	for ; i < len(lcTable); i++ {
+		lc = lcTable[i]
+		if lc.chMin > chMax {
+			return
+		}
+		chMinT = lc.chMin
+		if chMinT < chMin {
+			chMinT = chMin
+		}
+
+		chMaxT = lc.chMax
+		if chMaxT > chMax {
+			chMaxT = chMax
+		}
+
+		switch lc.op {
+		case LowercaseSet:
+			chMinT = rune(lc.data)
+			chMaxT = rune(lc.data)
+			break
+		case LowercaseAdd:
+			chMinT += lc.data
+			chMaxT += lc.data
+			break
+		case LowercaseBor:
+			chMinT |= 1
+			chMaxT |= 1
+			break
+		case LowercaseBad:
+			chMinT += (chMinT & 1)
+			chMaxT += (chMaxT & 1)
+			break
+		}
+
+		if chMinT < chMin || chMaxT > chMax {
+			c.addRange(chMinT, chMaxT)
+		}
+	}
+}