Question 1

How do I generate a man page with popl?

Accepted Answer

popl can automatically generate Groff-formatted help messages using the help() method. Output this to a file and process it with groff to create man pages, as mentioned in the features for automatic documentation.

Question 2

Does popl support subcommands like Git or Docker?

Accepted Answer

No, popl does not have built-in support for subcommands. It focuses on traditional option parsing and is better suited for tools with a flat command structure, which is a limitation compared to more advanced parsers.

Question 3

popl vs Boost.ProgramOptions: which should I use?

Accepted Answer

Choose popl for a lightweight, header-only solution with GNU getopt compatibility and no dependencies. Opt for Boost.ProgramOptions if you need subcommands, extensive validation, or are already using Boost in your project.

Question 4

Can I use popl to parse JSON config files?

Accepted Answer

popl only supports INI file parsing natively. For JSON, you would need to integrate an additional library, as popl does not handle it out of the box, limiting its configuration flexibility.

Question 5

How to handle required options in popl?

Accepted Answer

Mark options as required using Attribute::required when adding them. Then, check is_set() on the option object to enforce presence, as shown in the attributes section of the README.

Question 6

Is popl thread-safe for multi-threaded apps?

Accepted Answer

The README does not specify thread safety. Since parsing typically occurs at startup, it's likely safe for single-threaded use, but you should synchronize access if parsing concurrently in threads.

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