Const
Error raised when an option parameter fails to satisfy a choice constraint.
Warning produced when a deprecated option is specified on the command-line.
Error raised when an option is specified with an inline parameter, despite it being disallowed.
Error raised produced when a choices constraint has a duplicate value.
Error raised when there are two identical cluster letters.
Error raised when there are two identical option names.
Error raised when there are two or more positional options.
Error raised when an option has an invalid cluster letter.
Error raised when a variadic option is specified in the middle of a cluster argument.
Error raised when a variadic option declares an inline constraint.
Error raised when an option has an invalid name.
Error raised when a function option has an invalid parameter count.
Error raised when an option references a non-valued option in a requirement.
Error raised when an option uses a nullish value in a requirement referencing an option that is either always required or has a default value.
Error raised when an option references itself in a requirement.
Error raised when an option value fails to satisfy a count limit constraint.
Error raised when an option is specified with no inline parameter, despite it being required.
Error raised when an option is specified without one of its expected parameter(s).
Error raised when an option that is always required was not specified.
Error raised when a JavaScript module needs to be loaded, but a module resolution function was not provided (either in the parsing flags or the validation flags).
Warning produced when a name slot contains names with different naming conventions.
Error raised when an option parameter fails to satisfy a regex constraint.
Warning produced when an option name is too similar to other names.
Error raised when an option name is not found, with possible name suggestions.
Error raised when an option references an unknown option in a requirement.
Error raised when an option's conditional requirement is not satisfied.
Error raised when an option's forward requirement is not satisfied.
Warning produced when a variadic option declares cluster letters.
Error raised when the parser fails to find a version file when handling the version option.
The kind of error/warning raised by the parser or validator.