Function isValidLabelNameStart

expfmt/text_parse.go:946–948

(b byte)

}

func isValidLabelNameStart(b byte) bool {
	return (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || b == '"'
}

func isValidLabelNameContinuation(b byte, quoted bool) bool {
	return isValidLabelNameStart(b) || (b >= '0' && b <= '9') || (quoted && utf8.ValidString(string(b)))