Negative integers in the command line

[mbarbin]

Negative integers written with a leading minus sign look like flags in the command line. Example: -1.

I've looked at core.command, climate, and cmdliner and all agree to reject usage of negative integers as positional arguments:

https://github.com/mbarbin/cmdlang/blob/09586616c9256e8335bc56b7593fa00cd425616c/test/expect/test__negative_int_args.ml#L40

However, when the argument is named such as usage like ./main.exe -n -1, these libraries diverge. Some accept this syntax, while cmdliner rejects it:

https://github.com/mbarbin/cmdlang/blob/09586616c9256e8335bc56b7593fa00cd425616c/test/expect/test__negative_int_args.ml#L116

I don't know what to think of this (and don't have a current use case in mind), just reporting this incidental finding in case this is helpful to the cmdliner project. Thanks!