Alternatively, to let the programmer decide (because maybe they want to use -h for something else),
there should be a way to manually call the function that prints the usage information (that's called when --help is passed).
So that it can be manually called when -h is passed with an explicit #[argh(switch, short = 'h')] help: bool field.

I.e. this function:

But wrapped in a nicer way, callable as a method on the struct that FromArgs is derived on.

I'd be far more amicable to that change! That seems like a good option for those that want -h support

I'd also like to see an -h shorthand flag, and I'd be willing to create a PR. However, I am concerned that letting the user implement the shorthand and argh worry about the long flag, the help would end up looking something like that:

Options:
  -h                display usage information
  --help            display usage information

Therefore, I think either the user should be given the option to specify a shorthand for the help message, or be able to "replace" the help switch altogether. Let me know what you think.

oh interesting, yes that makes sense. I'm open to a change like that!

Agreed on the -h shorthand flag. As for anything else, I don't want programmers to decide that -h should mean anything else, I want it to just be always a shorthand for --help.

I made a pull request that fixes this issue #106