What is the recommended way to consume the excess of positional args?

[KOLANICH]

Hi again. For implementing "nesting" feature in HydrArgs (in fact, that is probably is one of the most important features in it) I need a way to get the "unconsumed" args. I mean the ones not recognized by the parser of the current level. I wonder what is the recommended way to do it? I guess it can be worked around by adding a dedicated positional argument into the end, but it would spoil help output and also would require a method to remove positional args from the spec (HydrArgs model assummes that args can be appended one-by-one, and in the case something must be done after the last arg is added, the framework has a pair of methods, _seal and _unseal. I can add the code adding a dummy positional arg into _seal, but there is no methods to remove them, so there is nothing that I can put into _unseal that reverts the action done by _seal).

So, if there is no such a feature, it may make sense to introuduce it, for example as a method setting a pointer to std::span<char *> (to place there just a direct subarray of argv).

[saveman]

Sorry for the late answer.

Not sure if that will suit your needs but originally the concept for nesting was to use subparsers:

https://saveman.github.io/octargs/html/page_argument_types.html
auto subparsers = arg_parser.add_subparsers("command");

[saveman]

@KOLANICH If that would not be suitable I have also added some proposal on branch:
https://github.com/saveman/octargs/tree/allow_unconsummed

Please check both solutions and let me know what do you think about them.

[KOLANICH]

Thanks, get_unconsummed_args works like a charm. The backend now passes the already existing tests (but the test suite is incomplete (doesn't cover all the functionality I wished to have in HydrArgs) and the functionality implemented in HydArgs is currently incomplete).