Comments for Bobbing for Kernels

Comment on Scheme status by Nobody

Nobody — Wed, 11 Nov 2009 20:52:40 +0000

I agree, self-hosting systems are not great for teaching.

Anyway you seem to have done your homework but I’ll mention these just in case you haven’t seen them.

Alexpander expands R5RS macros, and doesn’t rely on macros at all.

Andre van Tonder’s R6RS expander needs macros to boot itself, but it only has some simple syntax-rules macros, so it can be compiled with nearly any Scheme system. In fact, maybe it could be combined with Alexpander, so you could compile it on a Scheme without macros. In any case I found it to be much simpler than psyntax.

http://www.het.brown.edu/people/andre/macros/

Comment on Scheme status by kernelbob

kernelbob — Wed, 11 Nov 2009 16:53:54 +0000

Okay, toy is too strong a word. Still, explaining expansion in terms of syntax-case hides too much magic. One of my goals is to create a self-bootstrapping system, so I’m using a tiny subset of Scheme.

And you’re right about wchar_t. It’s on my (very long) to-do list to use a different type. But for now, I get a lot of leverage from libc’s character handling, such as the call to printf above.

Thanks for your comments.

Comment on Scheme status by nobody

nobody — Wed, 11 Nov 2009 06:39:58 +0000

implementing syntax-case in syntax-case might be cheating, but it’s not a toy. the portable syntax-case expander is written with itself and is the expander in many scheme implementations.

see: https://launchpad.net/r6rs-libraries/

note that wchar_t is not very portable because its size is not specified by the standard.

Comment on Scheming, part 7. The Reader. by Scheme status « Bobbing for Kernels

Scheme status « Bobbing for Kernels — Thu, 15 Oct 2009 07:13:20 +0000

[...] 2009 I’ve written here before about my efforts to write a Scheme interpreter from scratch. The last update was in May, but I’m still working on it. I’ve made 60 git commits since then. The major thing [...]

Comment on Video Test 2 by kernelbob

kernelbob — Sat, 22 Aug 2009 20:17:09 +0000

Casey: You obviously have no appreciation for beard hairs. But thanks for the resizing tip.

Comment on Video Test 2 by Casey Heckman

Casey Heckman — Sat, 22 Aug 2009 09:32:42 +0000

While using my three year old now-sucky-but-not-too-sucky laptop, Windows, both Chrome 2.0 and FF 3.0, using the Quicktime plugin, the larger HD video was choppy and some parts of the audio cut out. If you’re thinking of posting these on the interwebtubes for general consumption, I recommend the smaller lowdef format. Also, the video controls on both videos were cut off — looks like you need to increase the height of the object and embed tags by about 5-7 px.

Comment on Video Test 2 by amber

amber — Sat, 22 Aug 2009 01:18:09 +0000

I don’t know who this Bruce guy is, but I could see both of them, and they made me dizzy.

Comment on Video Test 2 by Robin Rosenberg

Robin Rosenberg — Sat, 22 Aug 2009 00:19:13 +0000

Bruce-SKEtta!! Yum, yum! The video apparently was too fast for my poor little laptop, but the slower one looked great.

Comment on Meet Mito. by Harriet

Harriet — Mon, 17 Aug 2009 23:45:56 +0000

Dang! Well, Bob, of course you did not have a problem driving…I am sure you fit right in

Comment on Milan by Harriet

Harriet — Mon, 17 Aug 2009 23:42:59 +0000

Hey you! We were in Sacramento, returning with a U Haul. Don’t ask. We will save our stories for drinks After unloading Mel and siblings stuff, then organizing, we collapsed for 3 or more days. I am back in the swing!

So glad you are blogging. Mel was in Italy during August Can’t wait to catch up and read the rest of your blog!