package unicode_test

import (
	"fmt"
	"unicode"
)

// Functions starting with "Is" can be used to inspect which table of range a
// rune belongs to. Note that runes may fit into more than one range.
func Example_is() {

	// constant with mixed type runes
	const mixed = "\b5Ὂg̀9! ℃ᾭG"
	for _, c := range mixed {
		fmt.Printf("For %q:\n", c)
		if unicode.IsControl(c) {
			fmt.Println("\tis control rune")
		}

	if errors.Is(err, err1) {
		fmt.Println("err is err1")
	}
	if errors.Is(err, err2) {
		fmt.Println("err is err2")
	}
	// Output:
	// err1
	// err2
	// err is err1
	// err is err2
}

func ExampleIs() {
	if _, err := os.Open("non-existing"); err != nil {
		if errors.Is(err, fs.ErrNotExist) {
			fmt.Println("file does not exist")
		} else {
			fmt.Println(err)
		}
	}

	// Output: