Re: ML-like alternatives to out parameters for functions

[Preben Randhol <randhol+news@pvv.org>]

Mark Lorenzen wrote:
> 
> procedure Proc (Arg : in AT; Result : out RT; Validity : out Boolean);
> 
> which is just a variant of the C hack and definately not beautiful.

What makes this :

function Calculate (Argument : in AT; Result_Valid : out Boolean) return RT;

anymore beautiful?

If you need to check if some return was valid I cannot see why one
should use a function. If it just so that one can write:

   Rt_Var := Calculate (Some_AT, Success);

then this is more C hack-flavoured to me than using 

   Calculate (Some_AT, Rt_Var, Success);

-- 
Preben Randhol ----------------  http://www.pvv.org/~randhol/     ._.
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