[goncaloo]

This looks pretty cool!

I can't ever imagine using it tho :) If my bash scripts are so complex or critical that I feel the need to type check, I will probably use another scripting language where I can do that more easily while still having readable code.

[kreetx]

If you ever check your arguments for any properties then this could still help, you'll have a systematic approach instead of an ad hoc one.