Re: Parameter evaluation order

[matthew_heaney@acm.org (Matthew Heaney)]

In article <x7vemz7xncq.fsf@pogner.demon.co.uk>, Simon Wright
<simon@pogner.demon.co.uk> wrote:

>> declare
>>    Arg1 : constant Arg1Type := Func_One;
>>    Arg2 : constant Arg2Type := Func_Two;
>> begin
>>    proc (Arg1, Arg2);
>> end;
>
>I was wondering if, because the order need arises from [invisible?]
>side-effects, a compiler might be allowed to reorder the declarations;
>but 3.11(7) says
>
>The elaboration of a declarative_part consists of the elaboration of
>the declarative_items, if any, in the order in which they are given in
>the declarative_part.

The term is "linear elaboration" of declarations.  You need this so you can
use the value of an object previously declared.  It's the same as the let*
expression in Lisp (compare let).