How to make my command like "<command> <arg>"

[Dangerise]

sorry about my poor english, I dont know how to exactly describe it ,

actually, I want a command line argument can be set without specify an argument name, for example , I want

my-notepad <path>

Instead of

my-notepad -p <path>

[epage]

That is a positional argument. See https://docs.rs/clap/latest/clap/_derive/_tutorial/chapter_2/index.html#positionals