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From: Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Q: Localizing type and package references
Date: Sun, 05 Jan 2014 18:29:22 -0700
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Date: 2014-01-05T18:29:22-07:00
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On 01/05/2014 04:55 PM, b.mcguinness747@gmail.com wrote:
>
> --------------------------------------------------------------------------------
> -- Types - Declarations of data types and related packages
> --------------------------------------------------------------------------------
> with Ada.Characters;
> with Ada.Characters.Wide_Latin_1;
> with Ada.Strings;
> with Ada.Strings.Wide_Maps;
> with Ada.Strings.Wide_Unbounded;
> with Ada.Wide_Characters;
> with Ada.Wide_Characters.Handling;
> with Ada.Wide_Text_IO;
> with Ada.Wide_Text_IO.Text_Streams;
>
> package Types is
>    package Chars         renames Ada.Characters.Wide_Latin_1;
>    package Char_Handling renames Ada.Wide_Characters.Handling;
>    package Char_IO       renames Ada.Wide_Text_IO;
>    package Char_Maps     renames Ada.Strings.Wide_Maps;
>    package Char_Streams  renames Ada.Wide_Text_IO.Text_Streams;
>    package Char_Strings  renames Ada.Strings.Wide_Unbounded;
>
>    subtype Char        is Wide_Character;
>    subtype Char_String is Ada.Strings.Wide_Unbounded.Unbounded_Wide_String;
> end Types;
>
> and then tried referencing this from the main program file with:
>
> with Types;
> use  Types;
>
> with Char_Strings;
>
> but the compiler (Gnat 4.6) complains that there is no file called
> char_strings.ads.  I am not sure if I have made a simple mistake that
> can be easily corrected to make this work, or if there is a different
> approach that I should be trying.

You can only with a library-level package, one not declared in anything else. 
Char_Strings is declared in package types, so it's not library level and can't 
be withed.

-- 
Jeff Carter
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