package main

import "fmt"

func main() {
	// 示例1
	{
		type MyString = string
		str := "BCD"
		myStr1 := MyString(str)
		myStr2 := MyString("A" + str)
		fmt.Printf("%T(%q) == %T(%q): %v\n",
			str, str, myStr1, myStr1, str == myStr1)
		fmt.Printf("%T(%q) > %T(%q): %v\n",
			str, str, myStr2, myStr2, str > myStr2)
		fmt.Printf("Type %T is the same as type %T.\n", myStr1, str)

		strs := []string{"E", "F", "G"}
		myStrs := []MyString(strs)
		fmt.Printf("A value of type []MyString: %T(%q)\n",
			myStrs, myStrs)
		fmt.Printf("Type %T is the same as type %T.\n", myStrs, strs)
		fmt.Println()
	}
	// 示例2
	// {
	// 	type MyString string
	// 	str := "BCD"
	// 	myStr1 := MyString(str)
	// 	myStr2 := MyString("A" + str)
	// 	_ = myStr2
	// 	fmt.Printf("%T(%q) == %T(%q): %v\n",
	// 		str, str, myStr1, myStr1, str == myStr1)
	// 	fmt.Printf("%T(%q) > %T(%q): %v\n",
	// 		str, str, myStr2, myStr2, str > myStr2)
	// 	fmt.Printf("Type %T is different from type %T.\n", myStr1, str)

	// 	strs := []string{"E", "F", "G"}
	// 	var myStrs []MyString
	// 	myStrs := []MyString(strs)
	// 	fmt.Printf("A value of type []MyString: %T(%q)\n",
	// 		myStrs, myStrs)
	// 	fmt.Printf("Type %T is different from type %T.\n", myStr1, str)
	// }
}