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From: Mark H Weaver <mhw@netris.org>
To: marco.maggi-ipsu@poste.it
Cc: guile-user@gnu.org, "Niels Möller" <nisse@lysator.liu.se>
Subject: Re: Question on mutability of argument lists
Date: Wed, 19 Mar 2014 15:25:41 -0400	[thread overview]
Message-ID: <87txauouru.fsf@yeeloong.lan> (raw)
In-Reply-To: <874n2unmvo.fsf@governatore.luna> (Marco Maggi's message of "Wed,  19 Mar 2014 18:01:31 +0100")

Marco Maggi <marco.maggi-ipsu@poste.it> writes:

> Niels Möller wrote:
>> However,  for  a  natural implementation  which  evaluates
>> arguments and conses the results  up to a list, this seems
>> to require an  extra copy of the argument  list, after all
>> values are evaluated  and before the list is  bound to the
>> rest parameter.
>
> Yes,  but it  depends  on  what is  "natural"  for you.   In
> Vicare, when  calling a  Scheme function, all  the arguments
> are pushed on the Scheme stack segment (similar to calling a
> C  function) and  then the  function is  called; the  callee
> takes  the leftover  arguments and  puts them  into a  newly
> allocated  list.

Indeed, and Guile 2 also does this in compiled code.

     Mark



  reply	other threads:[~2014-03-19 19:25 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-19  9:34 Question on mutability of argument lists Niels Möller
2014-03-19 17:01 ` Marco Maggi
2014-03-19 19:25   ` Mark H Weaver [this message]
2014-03-19 19:56     ` Niels Möller
2014-03-20 10:06       ` [OT] " Marco Maggi
2014-03-20 10:54         ` Niels Möller
2014-03-20 21:02         ` Andy Wingo

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