How-to guides

Short answers to specific questions, for when you already know what you are trying to do.

• Collect a repeated option — --tag a --tag b into a List.
• Write a converter for your own type — anything beyond the built-ins.
• Make a positional argument optional — and capture a trailing rest.
• Accept one of a fixed set of values — enums, matched case-insensitively.
• Choose between the delegate and annotation styles — what actually differs.

If you are new to Argot, the tutorial is a better starting point: these pages assume you already know what an Arguments class looks like.