package treerack import ( "fmt" "io" ) const ( charClassEscape = '\\' charClassBanned = "\\[]^-\b\f\n\r\t\v" ) func newChar( name string, not bool, chars []rune, ranges [][]rune, ) *charParser { return &charParser{ name: name, not: not, chars: chars, ranges: ranges, } } func (p *charParser) setName(n string) { p.name = n } func (p *charParser) setID(id int) { p.id = id } func (p *charParser) setCommitType(ct CommitType) {} func (p *charParser) preinit() {} func (p *charParser) validate(*registry) error { return nil } func (p *charParser) init(*registry) {} func (p *charParser) addGeneralization(int) {} func (p *charParser) parser() parser { return p } func (p *charParser) builder() builder { return &charBuilder{ id: p.id, name: p.name, } } func (p *charParser) isSingleChar() bool { return !p.not && len(p.chars) == 1 && len(p.ranges) == 0 } func (p *charParser) format(_ *registry, f formatFlags) string { if p.not && len(p.chars) == 0 && len(p.ranges) == 0 { return "." } esc := func(c ...rune) []rune { return escape(charClassEscape, []rune(charClassBanned), c) } var s []rune s = append(s, '[') if p.not { s = append(s, '^') } s = append(s, esc(p.chars...)...) for i := range p.ranges { s = append(s, esc(p.ranges[i][0])...) s = append(s, '-') s = append(s, esc(p.ranges[i][1])...) } s = append(s, ']') return string(s) } func (p *charParser) generate(w io.Writer, _ map[string]bool) error { var err error fprintf := func(f string, args ...interface{}) { if err != nil { return } _, err = fmt.Fprintf(w, f, args...) } fprintf("var p%d = charParser{", p.id) fprintf("id: %d,", p.id) if p.not { fprintf("not: true,") } if len(p.chars) > 0 { fprintf("chars: []rune{") for i := range p.chars { fprintf("%d,", p.chars[i]) } fprintf("},") } if len(p.ranges) > 0 { fprintf("ranges: [][]rune{") for i := range p.ranges { fprintf("{%d, %d},", p.ranges[i][0], p.ranges[i][1]) } fprintf("},") } fprintf("};") return err } func (b *charBuilder) generate(w io.Writer, _ map[string]bool) error { _, err := fmt.Fprintf(w, "var b%d = charBuilder{};", b.id) return err }