From: Matthew Heaney <matthewjheaney@earthlink.net>
Subject: Re: Strings as Parameters
Date: Tue, 05 Oct 2004 00:20:32 GMT
Date: 2004-10-05T00:20:32+00:00 [thread overview]
Message-ID: <u8yalzyqd.fsf@earthlink.net> (raw)
In-Reply-To: cjslbv$tb4$01$1@news.t-online.com
"Rick Santa-Cruz" <rick_santa_cruz75@msn.com> writes:
> But if I use a String as a Parameter of a function or procedure I don't have
> to specify the range. That means I can just write a procedure like this:
>
> procedure Test_It(S: String) is
> begin
> ...
> end Test_It;
>
> What is the technical detail behind this? And why is such possible?
Because some extra information, called a "dope vector", is passed in the
call. The dope vector describes the index values of the array object
passed as the parameter. That's how how the called operation knows the
index constraints (and the length) of the array object.
next prev parent reply other threads:[~2004-10-05 0:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-04 23:11 Strings as Parameters Rick Santa-Cruz
2004-10-05 0:20 ` Matthew Heaney [this message]
2004-10-05 0:41 ` Jeffrey Carter
2004-10-05 1:21 ` Stephen Leake
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