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From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: Need of help Leonid(dulman@ibm.net)
Date: 1997/02/17
Message-ID: <dewar.856199272@merv>#1/1
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References: <5dhbjt$hbe@news.ibm.net.il> <dewar.855436299@merv>
 <u8n2tdm68y.fsf@ehmgs2.et.tu-dresden.de> <3302387F.16BB@mds.lmco.com>
 <E5MBIp.Ix0@thomsoft.com>
Organization: New York University
Newsgroups: comp.lang.ada
Date: 1997-02-17T00:00:00+00:00
List-Id: <comp.lang.ada>


Rex said

<<An interesting problem occurred while trying to provide the
utility functions.  I had the following function:

function V_String_Of( Standard_String : in   String )
         return                            V_String is
begin

   -- Test omitted for Strings that are too large to fit.

   return ( Size => Standard_String'Length ,
            S    => Standard_String        ) ;

end V_String_Of ;


I liked this code because it did not require creating a
temporary variable on the stack, particularly if the string
was very large.  However, it failed whenever a substring
was passed which had a starting index other than 1:>>


What makes you think that this code will not require a temporary variable
on the stack? Just because you don't see it in the source, does not mean
it is not there. Of course compilers will differ. To see what GNAT is
doing, use the -gnatdg switch, which shows the expanded source.