Domenic Denicola wrote:
This looks lovely.
The only thing I'd want to add: we need integers! And generally better numeric
types. From speaking to developers on the ground, this is the biggest missing
language feature they see (that isn't already addressed in ES6). I know Brendan
has made some moves in this direction in SpiderMonkey, so let's just be sure it
doesn't fall off the roadmap :).
Thanks, I bet Mark just forgot value objects are already on the ES7 agenda.
Doing a quick poll of some IRC rooms, there's some call for shared-memory
multithreading. I know this was a concern of the asm.js project, or more
generally for the JS-as-a-compilation-target mission. I don't think this is a
good idea, but just passing it along.
We're researching still and will not let arbitrary data races violate JS
semantics (for one thing, this would hit all JITs that speculate
assuming invariants obtained from JS's event-loop concurrency within the
same realm, er, window -- it would break them all, AFAICT).
It may be that a Parallel JS "patient parent" model where
non-overlapping slices of an array-buffer are handed off to workers,
with results written back race-free, is enough for the interesting
use-cases.
Wild shared-memory threading with fine-grained coordination? That is an
anti-pattern in C/C++ due to the high cost of locking or equivalent
lock-free techniques at scale. In related news, threads still suck.
Finally, I know a lot of people, myself included, are excited about `await`
sugar. That is, the plan would be to use generators + promises in ES6 with the
awkwardness that entails; once we know what the prevailing patterns are we can
eliminate that awkwardness with `await` in ES7. (I've made [a sketch][1]
illustrating the idea, but of course the point of waiting is to find something
that works, not the first thing I think up.) How this fits in with the
concurrency strawman's more ambitious `!` operator is unclear though.
Not everyone is on board for making ! an infix operator via a restricted
production.
As you say, we still want a clear cowpath to pave for 'await'. This
means transpiler authors can help.
/be
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