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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Simple library functions
Date: Fri, 13 Feb 2004 15:36:01 -0600
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Date: 2004-02-13T15:36:01-06:00
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"Harald Korneliussen" <scallassig@mailexpire.com> wrote in message
news:19401efb.0402130454.2779b091@posting.google.com...
...
> Apropos that: when I looked at gnat's regexp package I saw a comment
> about certain functions being evaluated twice, once to determine the
> size and another time to actually produce the results. Have I
> understood correctly that in for instance
>
> s : String := function_returning_a_string_of_variable_length(junk :
> Integer);
>
> the function is actually evaluated twice?

No, the function is evaluated only once. The compiler has to return the
string and the bounds from the function at one time. Dunno what's going on
in GNAT's libraries.

                      Randy.