Error handling case analysis in the Go language

This article demonstrates an example of error handling in the Go language. Share with you for your reference. The specific analysis is as follows:

The error is to be able to describe anything in a string. The main idea is to consist of a predefined built-in interface type, error, and its method, Error, which returns the return string.
type error interface {
Error() string
}

This method is automatically called when an error is printed using the various printing functions of the fmt package.

package main

import (

    "fmt"

    "time"

)

type MyError struct {

    When time.Time

    What string

}

func (e *MyError) Error() string {

    return fmt.Sprintf("at %v, %s",

        e.When, e.What)

}

func run() error {

    return &MyError{

        time.Now(),

        "it didn't work",

    }

}

func main() {

    if err := run(); err != nil {

        fmt.Println(err)

    }

}

I hope this article has helped you with your Go language programming.