Golang Reverse String preserving Combining Characters

reverse.go

package main

import (
	"fmt"
	"unicode"
)

var combining = &unicode.RangeTable{
	R16: []unicode.Range16{
		{0x0300, 0x036f, 1}, // combining diacritical marks
		{0x1ab0, 0x1aff, 1}, // combining diacritical marks extended
		{0x1dc0, 0x1dff, 1}, // combining diacritical marks supplement
		{0x20d0, 0x20ff, 1}, // combining diacritical marks for symbols
		{0xfe20, 0xfe2f, 1}, // combining half marks
	},
}

func reverse(s string) string {
	sv := []rune(s)
	rv := make([]rune, 0, len(sv))
	cv := make([]rune, 0)
	for ix := len(sv) - 1; ix >= 0; ix-- {
		r := sv[ix]
		if unicode.In(r, combining) {
			cv = append(cv, r)
		} else {
			rv = append(rv, r)
			rv = append(rv, cv...)
			cv = make([]rune, 0)
		}
	}
	return string(rv)
}
func main() {
	fmt.Println(reverse("Hello World"))
	fmt.Println(reverse("👽👶⃠🎃"))
	fmt.Println(reverse("H̙̖ell͔o̙̟͚͎̗̹̬ ̯W̖͝ǫ̬̞̜rḷ̦̣̪d̰̲̗͈"))
}