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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: determining input data type
Newsgroups: comp.lang.ada
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Date: Sat, 18 Oct 2008 10:00:21 +0200
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Date: 2008-10-18T10:00:21+02:00
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On Fri, 17 Oct 2008 23:53:54 -0700 (PDT), deadlyhead wrote:

> Using Ada.Integer_Text_IO.Get does some work for you, though.  For
> instance, if the user inputs 214yy0, it puts 214 in My_Int and
> continues on its way.  This may not be what you want, thus some actual
> text processing may be in order.

Yes, this was one of the motivations behind:

   http://www.dmitry-kazakov.de/ada/strings_edit.htm 

Your example reworked for Strings_Edit:

with Ada.Text_IO;            use Ada.Text_IO;
with Strings_Edit.Integers;  use Strings_Edit.Integers;

procedure Int_Test is
   My_Int : Integer;
begin
   Put ("Give me some input, and I will tell you if it is an integer:");
   My_Int := Value (Get_Line);
   Put_Line (Image (My_Int) & " is an integer!");
exception
   when Constraint_Error =>
      Put_Line ("That was a too large integer!");
   when End_Error =>
      Put_Line ("You entered nothing!");
   when Data_Error =>
      Put_Line ("That was not an integer!");
end Int_Test;

The function Value takes care to check the whole string for containing
integer and nothing but integer.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de