ErrInvalidType reports an invalid or unexpected Go type for a dedicated purpose.

ErrRecusion describes a resursion errors caused by a dedicated element with an element history.

IsA checks for an error of a dedicated type along the error chain.

Join combines any number of errors to a single error.

NewEf provides an arror with an optional cause.

PropagateError propagates a deferred error to the named return value whose address has to be passed as argument.

PropagateErrorf propagates an optional deferred error to the named return value whose address has to be passed as argument.

Wrap wraps an occurred error with a context message.

Wrapf wraps an occurred error with a context message.

ErrorList is an error type with erros in it.