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From: "Britt Snodgrass" <britt.snodgrass@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Default rep specs for record types - documented??
Date: 4 Nov 2005 07:27:53 -0800
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Date: 2005-11-04T07:27:53-08:00
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Stephen Leake wrote:
> Stephen Leake <stephen_leake@acm.org> writes:
>

<snip>
>
> One solution is to have the compiler write the representation clause
> for me; in this case, if we make reasonable assumptions about
> 'record_type', there is only one reasonable rep clause. So I'd like to
> define:


Starting with version 4.2 I believe, the Apex Ada editor has a "Build
Rep Clauses" feature that will insert all applicable compiler generated
confirming representation clauses following a type declaration. I've
tried it with Apex NT 4.2.0c and it works nicely.

Here is an example:

    type Record_Type is
        record
            Field_0 : Integer_16;
            Field_1 : Integer_16;
            Field_2 : Integer_16;
        end record;

    for Record_Type use
        record
            Field_0 at 0 range 0 .. 15;
            Field_1 at 2 range 0 .. 15;
            Field_2 at 4 range 0 .. 15;
        end record;
    for Record_Type'Alignment use 4;
    for Record_Type'Size use 48;
    pragma Convention (Ada_Pass_By_Copy, Record_Type);

Everything after the record type declaration was generated by the
compiler and inserted by the editor,

-- Britt