Function IsHighSurrogate

internal/stringutil/util.go:289–291

(ch rune)

)

func IsHighSurrogate(ch rune) bool {
	return utf16.IsSurrogate(ch) && ch < SurrogateLowStart
}

func IsLowSurrogate(ch rune) bool {
	return utf16.IsSurrogate(ch) && ch >= SurrogateLowStart