Re: On functions and access types.

[Ted Dennison <dennison@telepath.com>]

Robert A Duff wrote:
> Caffeine Junky <nospam@hotmail.com> writes:
> 
> 
>>Now the compiler tells me that I cannot assign to an 'in' parameter.
>>However, as I understand it, a function can only take an 'in' parameter.
> 
> That's right.  If you want a function to modify its argument,
> you can use an access parameter, like "S: access Stack;",
> and call it with Some_Stack'Access.

..or use a pointer. C also allows only "in" parameters to functions, and 
passing pointers is the standard work-around there. (C++ allows 
reference parameters though).

> But in this case, it's better to use a procedure.

It almost always is.