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Re: underscores in debug output?
From: |
Christopher Howard |
Subject: |
Re: underscores in debug output? |
Date: |
Wed, 30 Aug 2017 07:16:05 -0800 |
Ok, okay. Is there some way to affect that? Perhaps I have to use some
debug printing or stop points to see those values?
On Wed, 2017-08-30 at 22:46 +0800, Alex Vong wrote:
> Christopher Howard <address@hidden> writes:
>
> > Hi, what does the underscore character mean in this debug output?
> >
> > 159:37 5 (delete ((3 . "c") (((2 . "b") (()) 1) (5 . "e") (())
> > 1)
> > 2) 2)
> > 163:49 4 (delete ((2 . "b") (()) 1) _)
> > 152:9 3 (delete _ _)
> > 86:11 2 (skew _)
> > 64:6 1 (horizontal-left-link? _)
> > 46:11 0 (left-tree _)
> >
> > Knowing the value of those parameters would be super helpful here,
> > but
> > for some reason they have been replaced by underscores.
>
> My guess would be that those values are being garbage-collected.
> Since _
> is the pattern for matching an arbitary value, it is used to denote a
> garbage-collected value.