proposal: errors: In() to check Is against multiple errors

[koaim]

Proposal Details

Problem
The code looks redundant and cumbersome in cases when you need to check an error match several times. Example:

func foo() {
  err := bar()
  if errors.Is(err, err1) || errors.Is(err, err2) || errors.Is(err, err3) {
    // some logic
  }
}

Solution
A new function that will allow you to check for errors like this:

func foo() {
  err := bar()
  if errors.In(err, err1, err2, err3) {
    // some logic
  }
}

Implementation

package errors

func In(err error, target ...error) bool {
  for _, v := range target {
    if errors.Is(err, v) {
      return true
    }
  }

  return false
}

[gabyhelp]

Related Issues

• proposal: errors: add Errors as a standard way to represent multiple errors as a single error #47811 (closed)
• proposal: errors: add Errors function to undo Join #57358 (closed)
• proposal: errors: add error matching utility functions #65121 (closed)
• [Feature Request] Shorter error catching #18425 (closed)
• proposal: errors: add NewJoinedErrors #48831 (closed)

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[seankhliao]

I don't think it's a very common thing to do:
https://github.com/search?q=language%3AGo+%2F%28errors.Is.*%5C%7C%5C%7C%29%2B%2F&type=code

[zigo101]

How about

// Match returns the matched error in targets for err.
func Match(err error, targets ...error) error 

?