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Date: Mon, 19 Mar 2018 07:51:37 -0700 (PDT)
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Subject: Re: little precision about anonymous access types
From: AdaMagica <christ-usch.grein@t-online.de>
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Xref: reader02.eternal-september.org comp.lang.ada:51068
Date: 2018-03-19T07:51:37-07:00
List-Id: <comp.lang.ada>

Am Montag, 19. M=C3=A4rz 2018 02:18:34 UTC+1 schrieb Mehdi Saada:
> At last, I would like to know what happens exactly when one tries to deal=
locate a pointer, referencing a variable *on the stack* ?

This is erroneous. See in the RM what erroneous means.

Also note that deallocation of an object allocated via new is erroneous whe=
n done with a different access type than was used to allocate the object.

Do never ever allocate with anonymous access types.
(Exception: coextensions - which some Ada aficionados consider a bad mistak=
e.)

I do not know where such an object is allocated, so I cannot tell what happ=
ens when you convert to a named access type:

declare
   type A_TYPE is access all INTEGER;
   A : A_TYPE;
begin
   declare
      B: access INTEGER :=3D new INTEGER'(7);
   begin
      A :=3D A_TYPE(B);
   end;
end;