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From: dennison@telepath.com (Ted Dennison)
Newsgroups: comp.lang.ada
Subject: Re: FAQ and string functions
Date: 1 Aug 2002 09:09:17 -0700
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bam@snoopy.apana.org.au (Brian May) wrote in message news:<29e5ffff.0207302052.465a3193@posting.google.com>...
> I have two questions concerning strings that I can't find answers for
> in the RM:
> 
> 1. How do I split a string up into tokens and iterate through the list
> of tokens (compare with C's strtok function)?

The analogous routine is Ada.Strings.*.Find_Token (where * is your
choice of "Fixed", "Bounded", or "Unbounded").

> 2. Can this ugly looking code be simplified?
> 
>       declare
>          I    : Iterator;
>       begin
>          I := Element_Iterator(Class_Element,"parent");
>          while More(I) loop
>             declare
>                My_Node : Node renames Value(I);
>                Class_Ref : DOM_String renames
> Get_Attribute(My_Node,"ref");
>             begin
>                Put_Line(Class_Name(Package_Id,Class_Ref)&"($1,$2,$3)");
>             end;
>             Next(I);
>          end loop;
>          Free(I);
>       end;

I'm not a big fan of these kinds of renames. Why not instead just
write:

Put_Line (Class_Name (Package_ID, Get_Attribute (Value (I), "ref")) &
          "($1,$2,$3)");

I think that's much easier to read than your 4 line (semicolon)
declare block.

If you insist in splitting it up, turn those renames into constants.
I'd still skip the "My_Node" one, unless you are going to use it in
more than one place.