One item on stack if there are no arguments?

[hanyuone]

Uses:

This is mainly useful for a "Hello, World!" program that takes no input.

Specs:

If there are no arguments given to a Wise program, the stack should start off with a single 0. Once there is an argument given, however, the stack is the same as usual. For example:

Wise program:
-~

No input: outputs 1
Input of 5: outputs 6

[Wheatwizard]

I've been thinking about this myself. However with a slightly different motivation. Once something is on the stack it is impossible to remove it. The normal pop :^| only works if there is nothing on the stack.