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Re: Commercial development
From: |
Marius Vollmer |
Subject: |
Re: Commercial development |
Date: |
Sun, 05 Jun 2005 23:41:22 +0300 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
Neil Jerram <address@hidden> writes:
> Is this a good fix for r5rs_pitfall 1.1?
scm_copy_tree is too much, since it makes the following code fail:
(let ((a '(1 2 3))) (letrec ((x a) (y a)) (eq? x y)))
We should not copy the values themselves, just the storage cells;
thus, scm_list_copy is the right thing here.
But should we make that change? I am not sure. It causes some
significant run-time overhead for an obscure benefit. For now I'll
just put in some comments in eval.c and r5rs_pitfall.test.
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- Re: Commercial development,
Marius Vollmer <=