Re: Languages From Hell -- your favorite one could walk again!

lwall@netlabs.com (Larry Wall)
Tue, 4 Oct 1994 00:20:30 GMT

          From comp.compilers

Related articles
[7 earlier articles]
Re: Languages From Hell -- your favorite one could walk again! adam@tucson.princeton.edu (1994-09-26)
Re: Languages From Hell -- your favorite one could walk again! adrian@platon.cs.rhbnc.ac.uk (1994-09-23)
Re: Languages From Hell -- your favorite one could walk again! avg@sprintlink.net (1994-09-25)
Re: Languages From Hell -- your favorite one could walk again! hbaker@netcom.com (1994-09-26)
Re: Languages From Hell -- your favorite one could walk again! sasghm@unx.sas.com (1994-09-27)
Re: Languages From Hell -- your favorite one could walk again! iwm@doc.ic.ac.uk (1994-09-29)
Re: Languages From Hell -- your favorite one could walk again! lwall@netlabs.com (1994-10-04)
Re: Languages From Hell -- your favorite one could walk again! Mike.Stok@meiko.concord.ma.us (1994-10-05)
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Newsgroups: comp.compilers
From: lwall@netlabs.com (Larry Wall)
Keywords: design, interpreter
Organization: NetLabs, Inc.
References: 94-09-076 94-09-182
Date: Tue, 4 Oct 1994 00:20:30 GMT

iwm@doc.ic.ac.uk writes:
: perl:
:
: Version 4 anyway: the way in which assigning a parameter in a subroutine
: to a local variable changes the way the parameter is passed from reference
: to value. I cannot think of a simple way to compile a language where the
: passing method cannot be determined until runtime


I think you've misunderstood. The parameters are always passed by
reference, and arrive in the form of an array--a concept that already
exists elsewhere in Perl. The customary assignment of these parameters
to a list of named variables merely does the copy that would have had
to be done anyway to get pass-by-value semantics, but without adding
any special syntax. This is usually called orthogonality. Believe
it or not, Perl is occasionally orthogonal. :-)


Larry Wall
lwall@netlabs.com
--


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