Question about Ada.Unchecked_Conversion

From: Eric Jacoboni (jaco_at_neottia.net)
Date: 10/29/04

  • Next message: Peter Hermann: "Re: decimal separator (international?" 
    Date: Fri, 29 Oct 2004 14:46:54 +0200

    Hi

    There is something i've probably not understood about
    Ada.Unchecked_Conversion behavior, despite readings of Barnes and
    RM95.

    To illustrate my pb, let a String in which i want to count
    various separators :

    subtype T_Phrase is String(1..Lg_Max);
       
    type T_Séparateur is (' ', Ht, Lf, ',' ,';', ':', '.', '?', '!');
    for T_Séparateur'Size use Character'Size;

    function Char_To_Séparateur is
          new Ada.Unchecked_Conversion(Character, T_Séparateur);

    Ma_Phrase : T_Phrase;

    What i want to do is simply a test like this, in order to find
    characters that are also separators:

    if Char_To_Séparateur(Ma_Phrase(I)) in T_Séparateur then
      ...
    end if;

    But this test always fails and i don't understand why. The logic seems
    correct so i suppose it's a misunderstanding of Unchecked_Conversion?

    Any clue? 

    -- 
Éric Jacoboni, né il y a 1402497600 secondes
  • Next message: Peter Hermann: "Re: decimal separator (international?"

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