49 lines
773 B
Go
49 lines
773 B
Go
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package match
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import (
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"fmt"
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"unicode/utf8"
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)
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type Range struct {
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Lo, Hi rune
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Not bool
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}
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func NewRange(lo, hi rune, not bool) Range {
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return Range{lo, hi, not}
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}
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func (self Range) Len() int {
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return lenOne
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}
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func (self Range) Match(s string) bool {
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r, w := utf8.DecodeRuneInString(s)
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if len(s) > w {
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return false
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}
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inRange := r >= self.Lo && r <= self.Hi
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return inRange == !self.Not
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}
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func (self Range) Index(s string) (int, []int) {
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for i, r := range s {
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if self.Not != (r >= self.Lo && r <= self.Hi) {
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return i, segmentsByRuneLength[utf8.RuneLen(r)]
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}
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}
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return -1, nil
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}
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func (self Range) String() string {
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var not string
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if self.Not {
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not = "!"
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}
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return fmt.Sprintf("<range:%s[%s,%s]>", not, string(self.Lo), string(self.Hi))
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}
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