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Wilt, Charles wrote:
...
Out of curiosity, why the limitation in the RPG compiler? Just to protect us from ourselves or some
other reason? The same data would be pushed onto the stack, so it would seem that the compiler could
allow a pointer by value parameter if it wanted to. Not that I can think of a good reason to do it
that way ;-)
Couldn't you do it with a C program?
Charles, you're right that the RPG compiler _could_ allow passing
_pointers_ by value to programs. And I guess it might even be useful
along with OPTIONS(*STRING).
With C, you can code as though you are passing the parameter by value,
but if the by-value parameter for a program call (OS linkage) isn't a
pointer, the C compiler automatically turns it into a by-reference
parameter. I find this it very confusing; if you have an OS-linkage
call with a pointer parameter and an int parameter, both by value, the
pointer parameter will get passed by value, but the int parameter will
get passed by reference.
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