the-way-to-go_ZH_CN/eBook/examples/chapter_13/panic_package.go

// panic_package.go
package main

import (
	"./parse/parse"
	"fmt"
)

func main() {
	var examples = []string{
		"1 2 3 4 5",
		"100 50 25 12.5 6.25",
		"2 + 2 = 4",
		"1st class",
		"",
	}

	for _, ex := range examples {
		fmt.Printf("Parsing %q:\n  ", ex)
		nums, err := parse.Parse(ex)
		if err != nil {
			fmt.Println(err) // here String() method from ParseError is used
			continue
		}
		fmt.Println(nums)
	}
}

/* Output:
Parsing "1 2 3 4 5":
  [1 2 3 4 5]
Parsing "100 50 25 12.5 6.25":
  pkg parse: error parsing "12.5" as int
Parsing "2 + 2 = 4":
  pkg parse: error parsing "+" as int
Parsing "1st class":
  pkg parse: error parsing "1st" as int
Parsing "":
  pkg: no words to parse
*/