Parsing long opts is trivial; just determine if the string exactly matches. E.g., "--version" only matches "--version". Short opts is what takes slightly more

Parsing long opts is trivial; just determine if the string exactly matches. E.g., "--version" only matches "--version". Short opts is what takes slightly more effort, because you have to accept both "-ld" and "-l -d". We already handle the "hard" case, we just need to support the easy case.