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From: Victor Porton <porton@narod.ru>
Newsgroups: comp.lang.ada
Subject: Subtype or derived type?
Date: Sat, 07 Oct 2017 19:19:18 +0300
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Xref: news.eternal-september.org comp.lang.ada:48389
Date: 2017-10-07T19:19:18+03:00
List-Id: <comp.lang.ada>

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.

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