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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Calling inherited primitive operations in Ada
Date: Fri, 2 Sep 2022 19:12:25 -0500
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"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> wrote in message 
news:teso01$16gg$1@gioia.aioe.org...
> On 2022-09-02 12:41, Jeffrey R.Carter wrote:
>
>> The only indefinite data structure that is needed seems to be holders.
>
> The language should support and encourage design that does not rely on 
> memory pools.
>
> In my view one of major advantages of Ada is that indefinite objects can 
> be handled without resorting to hidden or explicit pointers to pools.

But they're implemented with some sort of hidden allocation. (GNAT uses a 
"secondary stack", whatever that is, but that is just a restricted form of 
pool). Janus/Ada uses built-in pools with cleanup for all such things to 
simplify the interface (the code for allocations and stand-alone objects is 
mostly shared, both within the compiler and at runtime).

                                Randy.