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$ curl repovive.com/roadmaps/go/error-handling/custom-error-types

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$ curl repovive.com/roadmaps/go/error-handling/custom-error-types

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Custom Error Types - Error Handling | Go | Repovive

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Custom Error Types

Structured errors

Create custom types for errors that need extra data:

type ValidationError struct {
    Field string
    Msg   string
}

func (e ValidationError) Error() string {
    return fmt.Sprintf("%s: %s", e.Field, e.Msg)
}

Any type with an Error() method satisfies the error interface. Custom types let you include structured information.