mirror of
https://github.com/golang/go
synced 2024-09-15 22:20:06 +00:00
regexp: use rune
Public API of syntax tree changes. R=golang-dev, r, gri CC=golang-dev https://golang.org/cl/5302046
This commit is contained in:
Russ Cox
parent
81b014818c
commit
3e52dadfd7
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@ -90,15 +90,15 @@ func (m *machine) match(i input, pos int) bool {
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m.matchcap[i] = -1
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}
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runq, nextq := &m.q0, &m.q1
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rune, rune1 := endOfText, endOfText
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r, r1 := endOfText, endOfText
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width, width1 := 0, 0
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rune, width = i.step(pos)
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if rune != endOfText {
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rune1, width1 = i.step(pos + width)
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r, width = i.step(pos)
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if r != endOfText {
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r1, width1 = i.step(pos + width)
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}
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var flag syntax.EmptyOp
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if pos == 0 {
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flag = syntax.EmptyOpContext(-1, rune)
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flag = syntax.EmptyOpContext(-1, r)
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} else {
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flag = i.context(pos)
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}
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@ -112,15 +112,15 @@ func (m *machine) match(i input, pos int) bool {
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// Have match; finished exploring alternatives.
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break
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}
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if len(m.re.prefix) > 0 && rune1 != m.re.prefixRune && i.canCheckPrefix() {
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if len(m.re.prefix) > 0 && r1 != m.re.prefixRune && i.canCheckPrefix() {
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// Match requires literal prefix; fast search for it.
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advance := i.index(m.re, pos)
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if advance < 0 {
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break
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}
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pos += advance
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rune, width = i.step(pos)
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rune1, width1 = i.step(pos + width)
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r, width = i.step(pos)
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r1, width1 = i.step(pos + width)
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}
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}
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if !m.matched {
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@ -129,8 +129,8 @@ func (m *machine) match(i input, pos int) bool {
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}
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m.add(runq, uint32(m.p.Start), pos, m.matchcap, flag, nil)
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}
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flag = syntax.EmptyOpContext(rune, rune1)
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m.step(runq, nextq, pos, pos+width, rune, flag)
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flag = syntax.EmptyOpContext(r, r1)
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m.step(runq, nextq, pos, pos+width, r, flag)
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if width == 0 {
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break
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}
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@ -140,9 +140,9 @@ func (m *machine) match(i input, pos int) bool {
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break
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}
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pos += width
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rune, width = rune1, width1
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if rune != endOfText {
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rune1, width1 = i.step(pos + width)
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r, width = r1, width1
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if r != endOfText {
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r1, width1 = i.step(pos + width)
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}
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runq, nextq = nextq, runq
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}
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@ -166,7 +166,7 @@ func (m *machine) clear(q *queue) {
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// The step processes the rune c (which may be endOfText),
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// which starts at position pos and ends at nextPos.
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// nextCond gives the setting for the empty-width flags after c.
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func (m *machine) step(runq, nextq *queue, pos, nextPos, c int, nextCond syntax.EmptyOp) {
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func (m *machine) step(runq, nextq *queue, pos, nextPos int, c rune, nextCond syntax.EmptyOp) {
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longest := m.re.longest
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for j := 0; j < len(runq.dense); j++ {
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d := &runq.dense[j]
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@ -83,7 +83,7 @@ type Regexp struct {
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prefix string // required prefix in unanchored matches
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prefixBytes []byte // prefix, as a []byte
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prefixComplete bool // prefix is the entire regexp
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prefixRune int // first rune in prefix
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prefixRune rune // first rune in prefix
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cond syntax.EmptyOp // empty-width conditions required at start of match
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numSubexp int
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longest bool
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@ -224,13 +224,13 @@ func (re *Regexp) NumSubexp() int {
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return re.numSubexp
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}
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const endOfText = -1
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const endOfText rune = -1
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// input abstracts different representations of the input text. It provides
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// one-character lookahead.
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type input interface {
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step(pos int) (rune int, width int) // advance one rune
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canCheckPrefix() bool // can we look ahead without losing info?
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step(pos int) (r rune, width int) // advance one rune
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canCheckPrefix() bool // can we look ahead without losing info?
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hasPrefix(re *Regexp) bool
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index(re *Regexp, pos int) int
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context(pos int) syntax.EmptyOp
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@ -245,11 +245,11 @@ func newInputString(str string) *inputString {
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return &inputString{str: str}
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}
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func (i *inputString) step(pos int) (int, int) {
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func (i *inputString) step(pos int) (rune, int) {
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if pos < len(i.str) {
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c := i.str[pos]
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if c < utf8.RuneSelf {
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return int(c), 1
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return rune(c), 1
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}
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return utf8.DecodeRuneInString(i.str[pos:])
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}
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@ -269,7 +269,7 @@ func (i *inputString) index(re *Regexp, pos int) int {
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}
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func (i *inputString) context(pos int) syntax.EmptyOp {
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r1, r2 := -1, -1
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r1, r2 := endOfText, endOfText
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if pos > 0 && pos <= len(i.str) {
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r1, _ = utf8.DecodeLastRuneInString(i.str[:pos])
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}
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@ -288,11 +288,11 @@ func newInputBytes(str []byte) *inputBytes {
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return &inputBytes{str: str}
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}
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func (i *inputBytes) step(pos int) (int, int) {
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func (i *inputBytes) step(pos int) (rune, int) {
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if pos < len(i.str) {
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c := i.str[pos]
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if c < utf8.RuneSelf {
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return int(c), 1
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return rune(c), 1
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}
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return utf8.DecodeRune(i.str[pos:])
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}
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@ -312,7 +312,7 @@ func (i *inputBytes) index(re *Regexp, pos int) int {
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}
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func (i *inputBytes) context(pos int) syntax.EmptyOp {
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r1, r2 := -1, -1
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r1, r2 := endOfText, endOfText
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if pos > 0 && pos <= len(i.str) {
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r1, _ = utf8.DecodeLastRune(i.str[:pos])
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}
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@ -333,7 +333,7 @@ func newInputReader(r io.RuneReader) *inputReader {
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return &inputReader{r: r}
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}
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func (i *inputReader) step(pos int) (int, int) {
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func (i *inputReader) step(pos int) (rune, int) {
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if !i.atEOT && pos != i.pos {
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return endOfText, 0
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@ -91,8 +91,8 @@ func (c *compiler) init() {
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c.inst(InstFail)
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}
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var anyRuneNotNL = []int{0, '\n' - 1, '\n' + 1, unicode.MaxRune}
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var anyRune = []int{0, unicode.MaxRune}
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var anyRuneNotNL = []rune{0, '\n' - 1, '\n' + 1, unicode.MaxRune}
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var anyRune = []rune{0, unicode.MaxRune}
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func (c *compiler) compile(re *Regexp) frag {
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switch re.Op {
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@ -262,12 +262,12 @@ func (c *compiler) empty(op EmptyOp) frag {
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return f
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}
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func (c *compiler) rune(rune []int, flags Flags) frag {
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func (c *compiler) rune(r []rune, flags Flags) frag {
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f := c.inst(InstRune)
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i := &c.p.Inst[f.i]
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i.Rune = rune
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i.Rune = r
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flags &= FoldCase // only relevant flag is FoldCase
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if len(rune) != 1 || unicode.SimpleFold(rune[0]) == rune[0] {
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if len(r) != 1 || unicode.SimpleFold(r[0]) == r[0] {
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// and sometimes not even that
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flags &^= FoldCase
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}
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@ -276,11 +276,11 @@ func (c *compiler) rune(rune []int, flags Flags) frag {
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// Special cases for exec machine.
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switch {
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case flags&FoldCase == 0 && (len(rune) == 1 || len(rune) == 2 && rune[0] == rune[1]):
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case flags&FoldCase == 0 && (len(r) == 1 || len(r) == 2 && r[0] == r[1]):
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i.Op = InstRune1
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case len(rune) == 2 && rune[0] == 0 && rune[1] == unicode.MaxRune:
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case len(r) == 2 && r[0] == 0 && r[1] == unicode.MaxRune:
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i.Op = InstRuneAny
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case len(rune) == 4 && rune[0] == 0 && rune[1] == '\n'-1 && rune[2] == '\n'+1 && rune[3] == unicode.MaxRune:
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case len(r) == 4 && r[0] == 0 && r[1] == '\n'-1 && r[2] == '\n'+1 && r[3] == unicode.MaxRune:
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i.Op = InstRuneAnyNotNL
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}
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@ -57,7 +57,7 @@ sub ComputeClass($) {
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sub PrintClass($$@) {
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my ($cname, $name, @ranges) = @_;
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print "var code$cname = []int{ /* $name */\n";
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print "var code$cname = []rune{ /* $name */\n";
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for (my $i=0; $i<@ranges; $i++) {
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my @a = @{$ranges[$i]};
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printf "\t0x%x, 0x%x,\n", $a[0], $a[1];
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@ -82,7 +82,7 @@ type parser struct {
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free *Regexp
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numCap int // number of capturing groups seen
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wholeRegexp string
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tmpClass []int // temporary char class work space
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tmpClass []rune // temporary char class work space
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}
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func (p *parser) newRegexp(op Op) *Regexp {
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@ -149,7 +149,7 @@ func (p *parser) push(re *Regexp) *Regexp {
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// If r >= 0 and there's a node left over, maybeConcat uses it
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// to push r with the given flags.
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// maybeConcat reports whether r was pushed.
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func (p *parser) maybeConcat(r int, flags Flags) bool {
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func (p *parser) maybeConcat(r rune, flags Flags) bool {
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n := len(p.stack)
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if n < 2 {
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return false
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@ -178,7 +178,7 @@ func (p *parser) maybeConcat(r int, flags Flags) bool {
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}
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// newLiteral returns a new OpLiteral Regexp with the given flags
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func (p *parser) newLiteral(r int, flags Flags) *Regexp {
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func (p *parser) newLiteral(r rune, flags Flags) *Regexp {
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re := p.newRegexp(OpLiteral)
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re.Flags = flags
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if flags&FoldCase != 0 {
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@ -190,7 +190,7 @@ func (p *parser) newLiteral(r int, flags Flags) *Regexp {
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}
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// minFoldRune returns the minimum rune fold-equivalent to r.
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func minFoldRune(r int) int {
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func minFoldRune(r rune) rune {
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if r < minFold || r > maxFold {
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return r
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}
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@ -206,7 +206,7 @@ func minFoldRune(r int) int {
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// literal pushes a literal regexp for the rune r on the stack
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// and returns that regexp.
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func (p *parser) literal(r int) {
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func (p *parser) literal(r rune) {
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p.push(p.newLiteral(r, p.flags))
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}
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@ -369,7 +369,7 @@ func (p *parser) factor(sub []*Regexp, flags Flags) []*Regexp {
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}
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// Round 1: Factor out common literal prefixes.
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var str []int
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var str []rune
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var strflags Flags
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start := 0
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out := sub[:0]
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@ -380,7 +380,7 @@ func (p *parser) factor(sub []*Regexp, flags Flags) []*Regexp {
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//
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// Invariant: sub[start:i] consists of regexps that all begin
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// with str as modified by strflags.
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var istr []int
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var istr []rune
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var iflags Flags
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if i < len(sub) {
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istr, iflags = p.leadingString(sub[i])
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@ -543,7 +543,7 @@ func (p *parser) factor(sub []*Regexp, flags Flags) []*Regexp {
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// leadingString returns the leading literal string that re begins with.
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// The string refers to storage in re or its children.
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func (p *parser) leadingString(re *Regexp) ([]int, Flags) {
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func (p *parser) leadingString(re *Regexp) ([]rune, Flags) {
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if re.Op == OpConcat && len(re.Sub) > 0 {
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re = re.Sub[0]
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}
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@ -639,7 +639,7 @@ func literalRegexp(s string, flags Flags) *Regexp {
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for _, c := range s {
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if len(re.Rune) >= cap(re.Rune) {
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// string is too long to fit in Rune0. let Go handle it
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re.Rune = []int(s)
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re.Rune = []rune(s)
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break
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}
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re.Rune = append(re.Rune, c)
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@ -662,7 +662,7 @@ func Parse(s string, flags Flags) (*Regexp, os.Error) {
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var (
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p parser
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err os.Error
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c int
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c rune
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op Op
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lastRepeat string
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min, max int
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@ -935,7 +935,7 @@ func (p *parser) parsePerlFlags(s string) (rest string, err os.Error) {
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}
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// Non-capturing group. Might also twiddle Perl flags.
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var c int
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var c rune
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t = t[2:] // skip (?
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flags := p.flags
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sign := +1
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@ -1049,7 +1049,7 @@ func isCharClass(re *Regexp) bool {
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}
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// does re match r?
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func matchRune(re *Regexp, r int) bool {
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func matchRune(re *Regexp, r rune) bool {
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switch re.Op {
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case OpLiteral:
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return len(re.Rune) == 1 && re.Rune[0] == r
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@ -1186,7 +1186,7 @@ func (p *parser) parseRightParen() os.Error {
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// parseEscape parses an escape sequence at the beginning of s
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// and returns the rune.
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func (p *parser) parseEscape(s string) (r int, rest string, err os.Error) {
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func (p *parser) parseEscape(s string) (r rune, rest string, err os.Error) {
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t := s[1:]
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if t == "" {
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return 0, "", &Error{ErrTrailingBackslash, ""}
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@ -1221,7 +1221,7 @@ Switch:
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if t == "" || t[0] < '0' || t[0] > '7' {
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break
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}
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r = r*8 + int(t[0]) - '0'
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r = r*8 + rune(t[0]) - '0'
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t = t[1:]
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}
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return r, t, nil
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@ -1302,7 +1302,7 @@ Switch:
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// parseClassChar parses a character class character at the beginning of s
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// and returns it.
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func (p *parser) parseClassChar(s, wholeClass string) (r int, rest string, err os.Error) {
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func (p *parser) parseClassChar(s, wholeClass string) (r rune, rest string, err os.Error) {
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if s == "" {
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return 0, "", &Error{Code: ErrMissingBracket, Expr: wholeClass}
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}
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@ -1318,13 +1318,13 @@ func (p *parser) parseClassChar(s, wholeClass string) (r int, rest string, err o
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type charGroup struct {
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sign int
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class []int
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class []rune
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}
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// parsePerlClassEscape parses a leading Perl character class escape like \d
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// from the beginning of s. If one is present, it appends the characters to r
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// and returns the new slice r and the remainder of the string.
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func (p *parser) parsePerlClassEscape(s string, r []int) (out []int, rest string) {
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func (p *parser) parsePerlClassEscape(s string, r []rune) (out []rune, rest string) {
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if p.flags&PerlX == 0 || len(s) < 2 || s[0] != '\\' {
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return
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}
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@ -1338,7 +1338,7 @@ func (p *parser) parsePerlClassEscape(s string, r []int) (out []int, rest string
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// parseNamedClass parses a leading POSIX named character class like [:alnum:]
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// from the beginning of s. If one is present, it appends the characters to r
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// and returns the new slice r and the remainder of the string.
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func (p *parser) parseNamedClass(s string, r []int) (out []int, rest string, err os.Error) {
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func (p *parser) parseNamedClass(s string, r []rune) (out []rune, rest string, err os.Error) {
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if len(s) < 2 || s[0] != '[' || s[1] != ':' {
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return
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}
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@ -1356,7 +1356,7 @@ func (p *parser) parseNamedClass(s string, r []int) (out []int, rest string, err
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return p.appendGroup(r, g), s, nil
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}
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func (p *parser) appendGroup(r []int, g charGroup) []int {
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func (p *parser) appendGroup(r []rune, g charGroup) []rune {
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if p.flags&FoldCase == 0 {
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if g.sign < 0 {
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r = appendNegatedClass(r, g.class)
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@ -1401,7 +1401,7 @@ func unicodeTable(name string) (*unicode.RangeTable, *unicode.RangeTable) {
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// parseUnicodeClass parses a leading Unicode character class like \p{Han}
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// from the beginning of s. If one is present, it appends the characters to r
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// and returns the new slice r and the remainder of the string.
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func (p *parser) parseUnicodeClass(s string, r []int) (out []int, rest string, err os.Error) {
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func (p *parser) parseUnicodeClass(s string, r []rune) (out []rune, rest string, err os.Error) {
|
||||
if p.flags&UnicodeGroups == 0 || len(s) < 2 || s[0] != '\\' || s[1] != 'p' && s[1] != 'P' {
|
||||
return
|
||||
}
|
||||
|
|
@ -1533,7 +1533,7 @@ func (p *parser) parseClass(s string) (rest string, err os.Error) {
|
|||
|
||||
// Single character or simple range.
|
||||
rng := t
|
||||
var lo, hi int
|
||||
var lo, hi rune
|
||||
if lo, t, err = p.parseClassChar(t, s); err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
|
@ -1570,7 +1570,7 @@ func (p *parser) parseClass(s string) (rest string, err os.Error) {
|
|||
|
||||
// cleanClass sorts the ranges (pairs of elements of r),
|
||||
// merges them, and eliminates duplicates.
|
||||
func cleanClass(rp *[]int) []int {
|
||||
func cleanClass(rp *[]rune) []rune {
|
||||
|
||||
// Sort by lo increasing, hi decreasing to break ties.
|
||||
sort.Sort(ranges{rp})
|
||||
|
|
@ -1601,7 +1601,7 @@ func cleanClass(rp *[]int) []int {
|
|||
}
|
||||
|
||||
// appendLiteral returns the result of appending the literal x to the class r.
|
||||
func appendLiteral(r []int, x int, flags Flags) []int {
|
||||
func appendLiteral(r []rune, x rune, flags Flags) []rune {
|
||||
if flags&FoldCase != 0 {
|
||||
return appendFoldedRange(r, x, x)
|
||||
}
|
||||
|
|
@ -1609,7 +1609,7 @@ func appendLiteral(r []int, x int, flags Flags) []int {
|
|||
}
|
||||
|
||||
// appendRange returns the result of appending the range lo-hi to the class r.
|
||||
func appendRange(r []int, lo, hi int) []int {
|
||||
func appendRange(r []rune, lo, hi rune) []rune {
|
||||
// Expand last range or next to last range if it overlaps or abuts.
|
||||
// Checking two ranges helps when appending case-folded
|
||||
// alphabets, so that one range can be expanding A-Z and the
|
||||
|
|
@ -1642,7 +1642,7 @@ const (
|
|||
|
||||
// appendFoldedRange returns the result of appending the range lo-hi
|
||||
// and its case folding-equivalent runes to the class r.
|
||||
func appendFoldedRange(r []int, lo, hi int) []int {
|
||||
func appendFoldedRange(r []rune, lo, hi rune) []rune {
|
||||
// Optimizations.
|
||||
if lo <= minFold && hi >= maxFold {
|
||||
// Range is full: folding can't add more.
|
||||
|
|
@ -1677,7 +1677,7 @@ func appendFoldedRange(r []int, lo, hi int) []int {
|
|||
|
||||
// appendClass returns the result of appending the class x to the class r.
|
||||
// It assume x is clean.
|
||||
func appendClass(r []int, x []int) []int {
|
||||
func appendClass(r []rune, x []rune) []rune {
|
||||
for i := 0; i < len(x); i += 2 {
|
||||
r = appendRange(r, x[i], x[i+1])
|
||||
}
|
||||
|
|
@ -1685,7 +1685,7 @@ func appendClass(r []int, x []int) []int {
|
|||
}
|
||||
|
||||
// appendFolded returns the result of appending the case folding of the class x to the class r.
|
||||
func appendFoldedClass(r []int, x []int) []int {
|
||||
func appendFoldedClass(r []rune, x []rune) []rune {
|
||||
for i := 0; i < len(x); i += 2 {
|
||||
r = appendFoldedRange(r, x[i], x[i+1])
|
||||
}
|
||||
|
|
@ -1694,8 +1694,8 @@ func appendFoldedClass(r []int, x []int) []int {
|
|||
|
||||
// appendNegatedClass returns the result of appending the negation of the class x to the class r.
|
||||
// It assumes x is clean.
|
||||
func appendNegatedClass(r []int, x []int) []int {
|
||||
nextLo := 0
|
||||
func appendNegatedClass(r []rune, x []rune) []rune {
|
||||
nextLo := rune('\u0000')
|
||||
for i := 0; i < len(x); i += 2 {
|
||||
lo, hi := x[i], x[i+1]
|
||||
if nextLo <= lo-1 {
|
||||
|
|
@ -1710,9 +1710,9 @@ func appendNegatedClass(r []int, x []int) []int {
|
|||
}
|
||||
|
||||
// appendTable returns the result of appending x to the class r.
|
||||
func appendTable(r []int, x *unicode.RangeTable) []int {
|
||||
func appendTable(r []rune, x *unicode.RangeTable) []rune {
|
||||
for _, xr := range x.R16 {
|
||||
lo, hi, stride := int(xr.Lo), int(xr.Hi), int(xr.Stride)
|
||||
lo, hi, stride := rune(xr.Lo), rune(xr.Hi), rune(xr.Stride)
|
||||
if stride == 1 {
|
||||
r = appendRange(r, lo, hi)
|
||||
continue
|
||||
|
|
@ -1722,7 +1722,7 @@ func appendTable(r []int, x *unicode.RangeTable) []int {
|
|||
}
|
||||
}
|
||||
for _, xr := range x.R32 {
|
||||
lo, hi, stride := int(xr.Lo), int(xr.Hi), int(xr.Stride)
|
||||
lo, hi, stride := rune(xr.Lo), rune(xr.Hi), rune(xr.Stride)
|
||||
if stride == 1 {
|
||||
r = appendRange(r, lo, hi)
|
||||
continue
|
||||
|
|
@ -1735,10 +1735,10 @@ func appendTable(r []int, x *unicode.RangeTable) []int {
|
|||
}
|
||||
|
||||
// appendNegatedTable returns the result of appending the negation of x to the class r.
|
||||
func appendNegatedTable(r []int, x *unicode.RangeTable) []int {
|
||||
nextLo := 0 // lo end of next class to add
|
||||
func appendNegatedTable(r []rune, x *unicode.RangeTable) []rune {
|
||||
nextLo := rune('\u0000') // lo end of next class to add
|
||||
for _, xr := range x.R16 {
|
||||
lo, hi, stride := int(xr.Lo), int(xr.Hi), int(xr.Stride)
|
||||
lo, hi, stride := rune(xr.Lo), rune(xr.Hi), rune(xr.Stride)
|
||||
if stride == 1 {
|
||||
if nextLo <= lo-1 {
|
||||
r = appendRange(r, nextLo, lo-1)
|
||||
|
|
@ -1754,7 +1754,7 @@ func appendNegatedTable(r []int, x *unicode.RangeTable) []int {
|
|||
}
|
||||
}
|
||||
for _, xr := range x.R32 {
|
||||
lo, hi, stride := int(xr.Lo), int(xr.Hi), int(xr.Stride)
|
||||
lo, hi, stride := rune(xr.Lo), rune(xr.Hi), rune(xr.Stride)
|
||||
if stride == 1 {
|
||||
if nextLo <= lo-1 {
|
||||
r = appendRange(r, nextLo, lo-1)
|
||||
|
|
@ -1777,9 +1777,9 @@ func appendNegatedTable(r []int, x *unicode.RangeTable) []int {
|
|||
|
||||
// negateClass overwrites r and returns r's negation.
|
||||
// It assumes the class r is already clean.
|
||||
func negateClass(r []int) []int {
|
||||
nextLo := 0 // lo end of next class to add
|
||||
w := 0 // write index
|
||||
func negateClass(r []rune) []rune {
|
||||
nextLo := rune('\u0000') // lo end of next class to add
|
||||
w := 0 // write index
|
||||
for i := 0; i < len(r); i += 2 {
|
||||
lo, hi := r[i], r[i+1]
|
||||
if nextLo <= lo-1 {
|
||||
|
|
@ -1801,9 +1801,9 @@ func negateClass(r []int) []int {
|
|||
// ranges implements sort.Interface on a []rune.
|
||||
// The choice of receiver type definition is strange
|
||||
// but avoids an allocation since we already have
|
||||
// a *[]int.
|
||||
// a *[]rune.
|
||||
type ranges struct {
|
||||
p *[]int
|
||||
p *[]rune
|
||||
}
|
||||
|
||||
func (ra ranges) Less(i, j int) bool {
|
||||
|
|
@ -1835,7 +1835,7 @@ func checkUTF8(s string) os.Error {
|
|||
return nil
|
||||
}
|
||||
|
||||
func nextRune(s string) (c int, t string, err os.Error) {
|
||||
func nextRune(s string) (c rune, t string, err os.Error) {
|
||||
c, size := utf8.DecodeRuneInString(s)
|
||||
if c == utf8.RuneError && size == 1 {
|
||||
return 0, "", &Error{Code: ErrInvalidUTF8, Expr: s}
|
||||
|
|
@ -1843,11 +1843,11 @@ func nextRune(s string) (c int, t string, err os.Error) {
|
|||
return c, s[size:], nil
|
||||
}
|
||||
|
||||
func isalnum(c int) bool {
|
||||
func isalnum(c rune) bool {
|
||||
return '0' <= c && c <= '9' || 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z'
|
||||
}
|
||||
|
||||
func unhex(c int) int {
|
||||
func unhex(c rune) rune {
|
||||
if '0' <= c && c <= '9' {
|
||||
return c - '0'
|
||||
}
|
||||
|
|
|
|||
|
|
@ -371,10 +371,10 @@ func dumpRegexp(b *bytes.Buffer, re *Regexp) {
|
|||
b.WriteByte('}')
|
||||
}
|
||||
|
||||
func mkCharClass(f func(int) bool) string {
|
||||
func mkCharClass(f func(rune) bool) string {
|
||||
re := &Regexp{Op: OpCharClass}
|
||||
lo := -1
|
||||
for i := 0; i <= unicode.MaxRune; i++ {
|
||||
lo := rune(-1)
|
||||
for i := rune(0); i <= unicode.MaxRune; i++ {
|
||||
if f(i) {
|
||||
if lo < 0 {
|
||||
lo = i
|
||||
|
|
@ -392,12 +392,12 @@ func mkCharClass(f func(int) bool) string {
|
|||
return dump(re)
|
||||
}
|
||||
|
||||
func isUpperFold(rune int) bool {
|
||||
if unicode.IsUpper(rune) {
|
||||
func isUpperFold(r rune) bool {
|
||||
if unicode.IsUpper(r) {
|
||||
return true
|
||||
}
|
||||
c := unicode.SimpleFold(rune)
|
||||
for c != rune {
|
||||
c := unicode.SimpleFold(r)
|
||||
for c != r {
|
||||
if unicode.IsUpper(c) {
|
||||
return true
|
||||
}
|
||||
|
|
@ -407,8 +407,8 @@ func isUpperFold(rune int) bool {
|
|||
}
|
||||
|
||||
func TestFoldConstants(t *testing.T) {
|
||||
last := -1
|
||||
for i := 0; i <= unicode.MaxRune; i++ {
|
||||
last := rune(-1)
|
||||
for i := rune(0); i <= unicode.MaxRune; i++ {
|
||||
if unicode.SimpleFold(i) == i {
|
||||
continue
|
||||
}
|
||||
|
|
@ -427,8 +427,8 @@ func TestAppendRangeCollapse(t *testing.T) {
|
|||
// into the earlier ones (it looks back two ranges), so that
|
||||
// the slice never grows very large.
|
||||
// Note that we are not calling cleanClass.
|
||||
var r []int
|
||||
for i := 'A'; i <= 'Z'; i++ {
|
||||
var r []rune
|
||||
for i := rune('A'); i <= 'Z'; i++ {
|
||||
r = appendRange(r, i, i)
|
||||
r = appendRange(r, i+'a'-'A', i+'a'-'A')
|
||||
}
|
||||
|
|
|
|||
|
|
@ -3,17 +3,17 @@
|
|||
|
||||
package syntax
|
||||
|
||||
var code1 = []int{ /* \d */
|
||||
var code1 = []rune{ /* \d */
|
||||
0x30, 0x39,
|
||||
}
|
||||
|
||||
var code2 = []int{ /* \s */
|
||||
var code2 = []rune{ /* \s */
|
||||
0x9, 0xa,
|
||||
0xc, 0xd,
|
||||
0x20, 0x20,
|
||||
}
|
||||
|
||||
var code3 = []int{ /* \w */
|
||||
var code3 = []rune{ /* \w */
|
||||
0x30, 0x39,
|
||||
0x41, 0x5a,
|
||||
0x5f, 0x5f,
|
||||
|
|
@ -28,71 +28,71 @@ var perlGroup = map[string]charGroup{
|
|||
`\w`: {+1, code3},
|
||||
`\W`: {-1, code3},
|
||||
}
|
||||
var code4 = []int{ /* [:alnum:] */
|
||||
var code4 = []rune{ /* [:alnum:] */
|
||||
0x30, 0x39,
|
||||
0x41, 0x5a,
|
||||
0x61, 0x7a,
|
||||
}
|
||||
|
||||
var code5 = []int{ /* [:alpha:] */
|
||||
var code5 = []rune{ /* [:alpha:] */
|
||||
0x41, 0x5a,
|
||||
0x61, 0x7a,
|
||||
}
|
||||
|
||||
var code6 = []int{ /* [:ascii:] */
|
||||
var code6 = []rune{ /* [:ascii:] */
|
||||
0x0, 0x7f,
|
||||
}
|
||||
|
||||
var code7 = []int{ /* [:blank:] */
|
||||
var code7 = []rune{ /* [:blank:] */
|
||||
0x9, 0x9,
|
||||
0x20, 0x20,
|
||||
}
|
||||
|
||||
var code8 = []int{ /* [:cntrl:] */
|
||||
var code8 = []rune{ /* [:cntrl:] */
|
||||
0x0, 0x1f,
|
||||
0x7f, 0x7f,
|
||||
}
|
||||
|
||||
var code9 = []int{ /* [:digit:] */
|
||||
var code9 = []rune{ /* [:digit:] */
|
||||
0x30, 0x39,
|
||||
}
|
||||
|
||||
var code10 = []int{ /* [:graph:] */
|
||||
var code10 = []rune{ /* [:graph:] */
|
||||
0x21, 0x7e,
|
||||
}
|
||||
|
||||
var code11 = []int{ /* [:lower:] */
|
||||
var code11 = []rune{ /* [:lower:] */
|
||||
0x61, 0x7a,
|
||||
}
|
||||
|
||||
var code12 = []int{ /* [:print:] */
|
||||
var code12 = []rune{ /* [:print:] */
|
||||
0x20, 0x7e,
|
||||
}
|
||||
|
||||
var code13 = []int{ /* [:punct:] */
|
||||
var code13 = []rune{ /* [:punct:] */
|
||||
0x21, 0x2f,
|
||||
0x3a, 0x40,
|
||||
0x5b, 0x60,
|
||||
0x7b, 0x7e,
|
||||
}
|
||||
|
||||
var code14 = []int{ /* [:space:] */
|
||||
var code14 = []rune{ /* [:space:] */
|
||||
0x9, 0xd,
|
||||
0x20, 0x20,
|
||||
}
|
||||
|
||||
var code15 = []int{ /* [:upper:] */
|
||||
var code15 = []rune{ /* [:upper:] */
|
||||
0x41, 0x5a,
|
||||
}
|
||||
|
||||
var code16 = []int{ /* [:word:] */
|
||||
var code16 = []rune{ /* [:word:] */
|
||||
0x30, 0x39,
|
||||
0x41, 0x5a,
|
||||
0x5f, 0x5f,
|
||||
0x61, 0x7a,
|
||||
}
|
||||
|
||||
var code17 = []int{ /* [:xdigit:] */
|
||||
var code17 = []rune{ /* [:xdigit:] */
|
||||
0x30, 0x39,
|
||||
0x41, 0x46,
|
||||
0x61, 0x66,
|
||||
|
|
|
|||
|
|
@ -51,7 +51,7 @@ const (
|
|||
// at the beginning of the text.
|
||||
// Passing r2 == -1 indicates that the position is
|
||||
// at the end of the text.
|
||||
func EmptyOpContext(r1, r2 int) EmptyOp {
|
||||
func EmptyOpContext(r1, r2 rune) EmptyOp {
|
||||
var op EmptyOp
|
||||
if r1 < 0 {
|
||||
op |= EmptyBeginText | EmptyBeginLine
|
||||
|
|
@ -76,7 +76,7 @@ func EmptyOpContext(r1, r2 int) EmptyOp {
|
|||
// IsWordChar reports whether r is consider a ``word character''
|
||||
// during the evaluation of the \b and \B zero-width assertions.
|
||||
// These assertions are ASCII-only: the word characters are [A-Za-z0-9_].
|
||||
func IsWordChar(r int) bool {
|
||||
func IsWordChar(r rune) bool {
|
||||
return 'A' <= r && r <= 'Z' || 'a' <= r && r <= 'z' || '0' <= r && r <= '9' || r == '_'
|
||||
}
|
||||
|
||||
|
|
@ -85,7 +85,7 @@ type Inst struct {
|
|||
Op InstOp
|
||||
Out uint32 // all but InstMatch, InstFail
|
||||
Arg uint32 // InstAlt, InstAltMatch, InstCapture, InstEmptyWidth
|
||||
Rune []int
|
||||
Rune []rune
|
||||
}
|
||||
|
||||
func (p *Prog) String() string {
|
||||
|
|
@ -161,7 +161,7 @@ Loop:
|
|||
|
||||
// MatchRune returns true if the instruction matches (and consumes) r.
|
||||
// It should only be called when i.Op == InstRune.
|
||||
func (i *Inst) MatchRune(r int) bool {
|
||||
func (i *Inst) MatchRune(r rune) bool {
|
||||
rune := i.Rune
|
||||
|
||||
// Special case: single-rune slice is from literal string, not char class.
|
||||
|
|
@ -210,17 +210,17 @@ func (i *Inst) MatchRune(r int) bool {
|
|||
|
||||
// As per re2's Prog::IsWordChar. Determines whether rune is an ASCII word char.
|
||||
// Since we act on runes, it would be easy to support Unicode here.
|
||||
func wordRune(rune int) bool {
|
||||
return rune == '_' ||
|
||||
('A' <= rune && rune <= 'Z') ||
|
||||
('a' <= rune && rune <= 'z') ||
|
||||
('0' <= rune && rune <= '9')
|
||||
func wordRune(r rune) bool {
|
||||
return r == '_' ||
|
||||
('A' <= r && r <= 'Z') ||
|
||||
('a' <= r && r <= 'z') ||
|
||||
('0' <= r && r <= '9')
|
||||
}
|
||||
|
||||
// MatchEmptyWidth returns true if the instruction matches
|
||||
// an empty string between the runes before and after.
|
||||
// It should only be called when i.Op == InstEmptyWidth.
|
||||
func (i *Inst) MatchEmptyWidth(before int, after int) bool {
|
||||
func (i *Inst) MatchEmptyWidth(before rune, after rune) bool {
|
||||
switch EmptyOp(i.Arg) {
|
||||
case EmptyBeginLine:
|
||||
return before == '\n' || before == -1
|
||||
|
|
|
|||
|
|
@ -22,8 +22,8 @@ type Regexp struct {
|
|||
Flags Flags
|
||||
Sub []*Regexp // subexpressions, if any
|
||||
Sub0 [1]*Regexp // storage for short Sub
|
||||
Rune []int // matched runes, for OpLiteral, OpCharClass
|
||||
Rune0 [2]int // storage for short Rune
|
||||
Rune []rune // matched runes, for OpLiteral, OpCharClass
|
||||
Rune0 [2]rune // storage for short Rune
|
||||
Min, Max int // min, max for OpRepeat
|
||||
Cap int // capturing index, for OpCapture
|
||||
Name string // capturing name, for OpCapture
|
||||
|
|
@ -252,7 +252,7 @@ func (re *Regexp) String() string {
|
|||
|
||||
const meta = `\.+*?()|[]{}^$`
|
||||
|
||||
func escape(b *bytes.Buffer, r int, force bool) {
|
||||
func escape(b *bytes.Buffer, r rune, force bool) {
|
||||
if unicode.IsPrint(r) {
|
||||
if strings.IndexRune(meta, r) >= 0 || force {
|
||||
b.WriteRune('\\')
|
||||
|
|
@ -277,7 +277,7 @@ func escape(b *bytes.Buffer, r int, force bool) {
|
|||
default:
|
||||
if r < 0x100 {
|
||||
b.WriteString(`\x`)
|
||||
s := strconv.Itob(r, 16)
|
||||
s := strconv.Itob(int(r), 16)
|
||||
if len(s) == 1 {
|
||||
b.WriteRune('0')
|
||||
}
|
||||
|
|
@ -285,7 +285,7 @@ func escape(b *bytes.Buffer, r int, force bool) {
|
|||
break
|
||||
}
|
||||
b.WriteString(`\x{`)
|
||||
b.WriteString(strconv.Itob(r, 16))
|
||||
b.WriteString(strconv.Itob(int(r), 16))
|
||||
b.WriteString(`}`)
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue