Re: Ok sorry, it is just a book gives no feedback.

["Randy Brukardt" <randy@rrsoftware.com>]

Robert Dewar wrote in message <934j5c$eu9$1@nnrp1.deja.com>...
>In article <93421h$2ju$1@nnrp1.deja.com>,
>That's the point, it is easy to make vague statements about
>"side effects considered harmful", but it is quite another to
>rigorously define what you mean by side effects.
>
>You do NOT want to tell people that instrumenting functions is
>for some peculiar reason undesirable, or that memo functions
>are undesirable (though of course in the multi-tasking case,
>you have to worry about reentrancy in both these cases).

Indeed, that is why pragma Pure is so hard to use in practice: because
you can't instrument or otherwise debug code controlled by it. About all
you can do is remove the pragma, but that often makes the clients of the
package illegal. Thus debugging these things can be horrible.

            Randy.