Failure

Failure["tag", assoc] represents a failure of a type indicated by tag, with details in the association.

Examples

Create a failure object:

Failure["MyError", <|"MessageTemplate" -> "Something went wrong"|>]
(* Failure["MyError", <|"MessageTemplate" -> "Something went wrong"|>] *)

Test for failure:

FailureQ[Failure["Error", <||>]]
(* True *)

Please visit the official Wolfram Language Reference for more details.