In Go error
type is a built-in interface with a single method Error() string
.
All rules governing interfaces apply to error
type.
Among others, any type that implements error
interface can be used as value of error
type.
https://codeeval.dev/gist/05256b6d9a98579b1ca37941284934f9
Why use custom type in addition to built-in ways of creating errors?
Potential use cases are: