Go regexp

[itcuihao]

func reg() {
	// 判断汉字字母数字
	s := "nihao你好243"
	// str := `^[\u4e00-\u9fa5]+$`
	//     d:\mygo\src\ch\t>go test -v -run TestReg
	// === RUN   TestReg
	// --- FAIL: TestReg (0.00s)
	// panic: regexp: Compile(`^[\u4e00-\u9fa5]+$`): error parsing regexp: invalid escape sequence: `\u` [recovered]
	//         panic: regexp: Compile(`^[\u4e00-\u9fa5]+$`): error parsing regexp: invalid escape sequence: `\u`
	// str := "^[a-zA-Z0-9\u4e00-\u9fa5]+$"  // ok
	// str := `^[a-z0-9A-Z\p{Han}]+(_[a-z0-9A-Z\p{Han}]+)*?$`
	str := `^[a-z0-9A-Z\p{Han}]+$` // ok
	r := regexp.MustCompile(str)
	b := r.MatchString(s)
	fmt.Println(b)
}