Brendan Eich wrote:
On Oct 26, 2011, at 12:08 PM, Michael Dyck wrote:
According to
http://wiki.ecmascript.org/doku.php?id=harmony:harmony
goal #2 of Harmony is:
Switch to a testable specification, ideally
a definitional interpreter hosted mostly in ES5.
Is there much activity toward this goal? The current ES6 drafts are
using mostly the same formalism as ES1 (although there was a marked
de-spaghettification between ES3 and ES5).
My opinion is that the best we'll do on this goal, better than past
ECMA-262 specs, is the http://test262.ecmascript.org/ project.
I.e., we have a testsuite and it will be maintained and extended.
Certainly a laudable effort.
(I ask because, in my spare time, I'm developing a process that massages
the ES spec into an executable/testable form. So I wonder if I'm
duplicating existing work.)
Interesting -- you are writing an interpreter?
Yes, but not an interpreter for ES, rather an interpreter (more or less)
for ES-spec-ese, the ad hoc notation that the ES spec's algorithms are
written in. So then if you feed the ES spec to *that* interpreter, you
do get an interpreter for ES. That's the idea, anyhow. It works, but so
far only for really simple programs.
-Michael
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