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From: "Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org>
Subject: Re: Proposal: Auto-allocation of Indefinite Objects
Date: Mon, 27 Jul 2020 22:31:34 +0200	[thread overview]
Message-ID: <rfndj6$lti$1@dont-email.me> (raw)
In-Reply-To: <rfn41o$ccv$1@dont-email.me>

On 7/27/20 7:48 PM, Brian Drummond wrote:
> 
> Is there any way we could generalise the (storage, access and lifetime
> aspects of) Unbounded_String for unconstrained arrays and discriminated
> records in such a way that Unbounded_String can be a simple instantiation
> of one of these?

Ada.Strings.Unbounded can be considered a combination of 
Ada.Containers.Indefinite_Holders instantiated for String and 
Ada.Containers.Vectors instantiated with Positive and Character, with some 
additional operations added.

The To_String and To_Unbounded_String operations of Unbounded_String are similar 
to the Element and Replace_Element operations of Holder, which do not exist for 
Vector.

The indexed operations of Unbounded_String are similar to the indexed operations 
of Vector, which do not exist for Holder.

If Ada.Containers.Vectors had an additional generic formal type

    type Fixed is array (Index_Type range <>) of Element_Type;

and 2 new operations

    function To_Fixed (From : Vector) return Fixed;
    function To_Vector (From : Fixed) return Vector;

then we wouldn't need Ada.Strings.Unbounded.

-- 
Jeff Carter
"Blessed is just about anyone with a vested interest in the status quo."
Monty Python's Life of Brian
73

  parent reply	other threads:[~2020-07-27 20:31 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-03 22:48 Proposal: Auto-allocation of Indefinite Objects Stephen Davies
2020-04-03 23:45 ` Stephen Leake
2020-04-04 10:54   ` Jeffrey R. Carter
2020-04-04 20:55     ` Stephen Davies
2020-04-04  8:31 ` Dmitry A. Kazakov
2020-07-27  7:47 ` Yannick Moy
2020-07-27  9:21   ` J-P. Rosen
2020-07-27  9:49     ` Dmitry A. Kazakov
2020-07-27 17:48   ` Brian Drummond
2020-07-27 20:02     ` Dmitry A. Kazakov
2020-07-28 14:28       ` Brian Drummond
2020-07-28 14:59         ` Dmitry A. Kazakov
2020-07-29 15:33           ` Brian Drummond
2020-07-29 16:20             ` Dmitry A. Kazakov
2020-07-30 13:37               ` Stephen Davies
2020-07-30 14:23                 ` Dmitry A. Kazakov
2020-07-30 17:04               ` Brian Drummond
2020-07-30 18:28                 ` Dmitry A. Kazakov
2020-08-10  0:39                   ` Randy Brukardt
2020-08-10  8:57                     ` Dmitry A. Kazakov
2020-08-20  0:10                       ` Randy Brukardt
2020-08-20 17:49                         ` Dmitry A. Kazakov
2020-08-20 20:19                           ` Dennis Lee Bieber
2020-08-20 23:33                             ` Randy Brukardt
2020-08-21  6:45                               ` Dmitry A. Kazakov
2020-08-23  4:52                                 ` Randy Brukardt
2020-08-23 12:28                                   ` Dmitry A. Kazakov
2020-08-20 23:30                           ` Randy Brukardt
2020-08-21  6:46                             ` Dmitry A. Kazakov
2020-08-23  4:48                               ` Randy Brukardt
2020-08-23 12:29                                 ` Dmitry A. Kazakov
2020-08-10  0:31               ` Randy Brukardt
2020-08-10  8:58                 ` Dmitry A. Kazakov
2020-08-20  0:13                   ` Randy Brukardt
2020-08-20 17:49                     ` Dmitry A. Kazakov
2020-08-20 23:25                       ` Randy Brukardt
2020-08-21  7:08                         ` Dmitry A. Kazakov
2020-08-23  5:03                           ` Randy Brukardt
2020-08-23 12:28                             ` Dmitry A. Kazakov
2020-07-27 20:31     ` Jeffrey R. Carter [this message]
2020-07-31  9:25 ` Stephen Davies
2020-07-31 10:20   ` Dmitry A. Kazakov
2020-08-01 11:22     ` Stephen Davies
2020-08-01 12:58       ` Dmitry A. Kazakov
2020-08-01 20:35         ` Stephen Davies
2020-08-01 20:56           ` Dmitry A. Kazakov
2020-09-03  4:30 ` linda white
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