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From: spencer@ERA.COM (Spencer Allain)
Subject: Re: Syntax question
In-Reply-To: dweller@Starbase.NeoSoft.COM's message of 15 Mar 1995 20: 25:11
 -0600
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References: <3jt25s$dim@felix.seas.gwu.edu> <3k7t8o$4pt@hacgate2.hac.com>
	<3k87i7$q7g@Starbase.NeoSoft.COM>
Date: Thu, 16 Mar 1995 14:44:30 GMT
Date: 1995-03-16T14:44:30+00:00
List-Id: <comp.lang.ada>

In article <3k87i7$q7g@Starbase.NeoSoft.COM> dweller@Starbase.NeoSoft.COM (David Weller) writes:

   In article <3k7t8o$4pt@hacgate2.hac.com>,
   David Kusuda <dkusu@atc-1s.hac.com> wrote:
   >  b) Omit parameters which have default values.  I think that this 
   >     is very useful, too bad C++ doesn't have the same thing.
   >

   It does, too!  All you hafta do is add another member function with
   the new parameter list.  After that, all it is is just another
   recompile :-)

Just as a clarification, not as a defense, C++ does allow omission of defaulted
parameters.

The function declared as

void func(int first,
          int second = 2,
          int third  = 3) ;

can be accessed in any of the three following ways.

    func(4, 5, 6) ;
    func(4, 5) ;
    func(4) ;

What you cannot do is something of this nature,

    func(4, third:6);

since binding of variables is purely positional, and there is no such thing
as the "third:" syntax shown above.

This is what I assume was referred to when mentioning that C++ was unable
to omit (intermediate) parameters with default values.

Spencer Allain <spencer@era.com>
Engineering Research Associates
Vienna, VA  22182