Function UnwrapOnce

errbase_api.go:30–30

UnwrapOnce accesses the direct cause of the error if any, otherwise returns nil. It supports both errors implementing causer (`Cause()` method, from github.com/pkg/errors) and `Wrapper` (`Unwrap()` method, from the Go 2 error proposal).

(err error)

// github.com/pkg/errors) and `Wrapper` (`Unwrap()` method, from the
// Go 2 error proposal).
func UnwrapOnce(err error) error { return errbase.UnwrapOnce(err) }

// UnwrapAll accesses the root cause object of the error.
// If the error has no cause (leaf error), it is returned directly.