Path: utzoo!utgpu!water!watmath!watdragon!gvcormack
From: gvcormack@watdragon.waterloo.edu (Gordon V. Cormack)
Newsgroups: comp.lang.misc
Subject: Re: Var scoping in Wirth-type languages
Message-ID: <5685@watdragon.waterloo.edu>
Date: 13 Mar 88 17:05:33 GMT
References: <3949@ihlpf.ATT.COM> <170500016@uiucdcsb>
Organization: U of Waterloo, Ontario
Lines: 13

In article <170500016@uiucdcsb>, robison@uiucdcsb.cs.uiuc.edu writes:
> 
> For languages without "upward funargs" (e.g. Pascal), a global display
> is sufficient, and furthermore requires only one extra push/pop per
> procedure call. 

Not true.  Procedure and Function parameters can access an environment
totally disjoint from the calling environment.  Hence, each such 
parameter requires its own display (or static link). 
-- 
Gordon V. Cormack     CS Dept, University of Waterloo, Canada N2L 3G1
                      gvcormack@waterloo  { .CSNET or .CDN or .EDU }
                      gvcormack@water         { UUCP or BITNET }