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From: Victor Porton <porton@narod.ru>
Newsgroups: comp.lang.ada
Subject: Re: Subtype or derived type?
Date: Sat, 07 Oct 2017 19:24:18 +0300
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Date: 2017-10-07T19:24:18+03:00
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Victor Porton wrote:

> Victor Porton wrote:
> 
>> While developing (thick object oriented) bindings for a C library:
>> 
>> I have developed a package containing Term_Type type with bindings
>> for raptor_term type:
>> https://github.com/vporton/redland-bindings/blob/ada2012/ada/src/rdf-raptor-term.ads
>> 
>> Term_Type represents pointer C type raptor_term* (where raptor_term
>> is a struct).
>> 
>> Now I am developed bindings for librdf_node which is defined as:
>> 
>> typedef raptor_term librdf_node;
>> 
>> Now I ask advice how to define the type representing librdf_node*
>> pointer type.
>> 
>> I have two variants in mind:
>> 
>> 1.
>> 
>> subtype Node_Type is Term_Type;
>> 
>> 2.
>> 
>> type Node_Type is new Term_Type;
>> 
>> Please advise which of the two is better.
> 
> I am declined to use a derived type, because I may naturally have
> subprograms with the same name (as the name is derived from the name of
> the corresponding C function) and then using subtype, when I "use" both
> modules, the names would clash.

"declined" should be "inclined".

> But I am not sure.

-- 
Victor Porton - http://portonvictor.org