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Date: Wed, 20 Aug 2008 21:52:26 +0300
From: Niklas Holsti <niklas.holsti@tidorum.invalid>
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Subject: Re: Array slices and types
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Date: 2008-08-20T21:52:26+03:00
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Dmitry A. Kazakov wrote:
> On Wed, 20 Aug 2008 07:51:02 -0700 (PDT), Maciej Sobczak wrote:
> 
> 
>>Consider this:
>>
>>   type Name is new String (1 .. 10);
>>
>>   N : Name;
>>
>>   Some_String : String := "abc";
>>
>>How can I assign Some_String to the beginning slice (ie. to the first
>>three characters) of N?
>>Everything that I can think of (short of copying characters
>>individually) hits the type compatibility problem.
> 
> 
> You need an unconstrained base type for this. In your case the base is
> anonymous. So name it:
> 
>    type Name_Base is new String; -- The base type is now named
>    subtype Name is Name_Base (1..10);
>    N : Name;
>    Some_String : String := "abc";
> begin
>    N (1..3) := Name_Base (Some_String);

Or you can use the 'Base attribute:

    N(1..3) := Name'Base (Some_String(1..3));

-- 
Niklas Holsti
Tidorum Ltd
niklas holsti tidorum fi
       .      @       .