Contains error messages or matched argument lists for each option, also storing number of arguments that failed to match and excess arguments.
Contains error messages or matched argument lists for each option, also storing number of arguments that failed to match and excess arguments.
Also defines ordering for selecting best-match failure from list of failures.
Run parse.
Run parse.
trailing arguments before last multi-arg option (will be Nil if there was no last multi-arg option)
option definition and invocation string forthe last multi-arg option (if it was present)
trailing arguments after the last multi-arg option (including arguments to that option if it is present)
list of trailing option definitions
Parses the trailing arguments (including the arguments to last option). Uses simple backtraking algorithm.