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Danny Yoo 2011-07-22 13:56:25 -04:00
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notes/racket-days-abstract.txt
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@ -56,58 +56,58 @@ What needs to be done next?
The story for the presentation:
What's Whalesong? It's a Racket to JavaScript compiler. Here's an
example of it in action.
(Compile a very simple program to a web page, a computation, then show
that it's effective.)
Whalesong will be used to support World programming for the web. For
example, we can support simple animations, as you'd expect:
What's Whalesong? It's a Racket to JavaScript compiler. Whalesong
will be used to support World programming for the web. It will be the
evaluator for the upcoming versions of Moby Scheme, as well as
WeScheme.
We can support simple animations, as you'd expect:
(Show a world program: the falling rain drops program.)
But we can also do programs that have interactivity, such as:
We can do programs that have interactivity, such as:
(Show another world program: pacman.)
A core idea behind Whalesong is to reuse Racket's infrastructure as
much as possible. I'm not a compiler person. I can piggiback on
Matthew's work, though. Whalesong reuses the bytecode compiler, and
translates the bytecode to JavaScript. I really am reusing the
linguistic features of Racket. For example, let's look at the
less-than-impressive program output below.
much as possible. I'm not a compiler person, so I cheat, by
piggibacking on Matthew's work. Whalesong reuses the bytecode
compiler, and translates the bytecode to JavaScript.
I really am reusing the linguistic features of Racket. For example,
let's look at the less-than-impressive program output below.
(Show the hello world program)
This is not too impressive. But let's look at the source code.
This is trivial, right? Let's look at the source code.
(Show the BF program.)
(Reveal that the program was written in BF)
Yeah. So we really are using Racket's underlying language features to
handle things like macro expansion.
Yes, this is unholy, but it works. We really are using Racket's
underlying language features to handle reading, macro expansion, and
optimization.
Because we're on the web, we may even want to use functions that we've
written in Racket as a part of regular web pages. Whalesong lets you
written in Racket as a part of regular web pages. Whalesong lets us
do this.
(Show the factorial example, and how it can be used by external
JavaScript on a web page).
JavaScript on a web page.)
There's quite a bit that's missing: we don't yet have all of the
primitives necessary to compile racket/base, so all Whalesong programs
have to be in a language that ultimately bottoms to (planet
currently have to be in a language that ultimately bottoms to (planet
dyoo/whalesong/lang/base).
I'm going to get a release out in the following month, and the new
@ -115,5 +115,4 @@ versions of Moby Scheme for Smartphones, as well as the WeScheme
environment, will be using the underlying evaluator of Whalesong.
If you're interested, please talk to me during the break. Thanks!