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Date: Sat, 18 Jun 2016 14:26:42 -0700 (PDT)
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Subject: Curiosity about different integer types
From: mockturtle <framefritti@gmail.com>
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Xref: news.eternal-september.org comp.lang.ada:30795
Date: 2016-06-18T14:26:42-07:00
List-Id: <comp.lang.ada>

Dear all,
few days ago a curiosity came to my mind.  Consider this

  type Foo is new Integer range 0 .. 115;

  type Bar is new Integer range -1000 .. 1000;

My gut feeling is that, despite the fact that they are both derived from In=
teger, there is no guarantee that the "binary type" underneath them is the =
same.  For example, Foo could be implemented as an 8-bit integer, while Bar=
 could be implemented as a 16-bit integer, or maybe both could be implement=
ed as (say) 32-bit integers.

Am I right?  I tried to do some experiments with gcc and both types are imp=
lemented with the same binary type, but it could be only for efficiency rea=
sons...