Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!oliveb!ames!haven!mimsy!jds
From: jds@mimsy.UUCP (James da Silva)
Newsgroups: comp.lang.pascal
Subject: Re: Turbo and Standard Pascal
Message-ID: <18501@mimsy.UUCP>
Date: 12 Jul 89 01:52:17 GMT
References: <20172@adm.BRL.MIL> <4822@freja.diku.dk> <4249@eos.UUCP> <2075@csuna.csun.edu> <19440@paris.ics.uci.edu>
Reply-To: jds@mimsy.umd.edu (James da Silva)
Organization: University of Maryland, Department of Computer Science
Lines: 18

In article <19440@paris.ics.uci.edu> milne@ics.uci.edu (Alastair Milne) writes:
>    BTW, how is scoping defined for procedures passed by the method you
>    describe for Turbo 5.0?

Alastair,

The scoping is static as usual.  Since procedure values cannot be returned,
the implementation is straightforward.  The procedure parameter consists of
a code pointer AND an `environment pointer'.  The environment pointer
points to the frame of the static parent of the procedure parameter.

If you could return local procedures, things would get much more
complicated.

Jaime
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: domain: jds@mimsy.umd.edu				     James da Silva
: path:   uunet!mimsy!jds