Re: Prompt Override Program

["Simon Coulter" <shc@xxxxxxxxxxxxxxxxx>]

M
Hello Martin,

You wrote:
>That's what I used on the only one I've ever written, and that worked.
>But I've also seen them with no selective prompting characters at all.

While ?? does work, I don't think it is appropriate because the POP is not
always invoked and therefore the CPP will get the command default anyway.
It also indicates to the CPP that the user changed something when they
didn't.

If you don't use any selective prompt characters then the behaviour is like
using ??.  You get either the POP supplied value or the value typed by the
user but you never get the default value unless the command was run without
prompting.

I prefer the ?< approach because that fits with the designed intention of
prompt override programs and allows my CPP to process the command without
caring about the difference between default values and POP supplied values.

The above presumes use of ??KEYWORD(value) rather than ??KEYWORD() which
seems mostly pointless.

Regards,
Simon Coulter.

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