Re: lua.vm.js - Lua VM, on the Web

[Alon Zakai <alonzakai@...>]

We are compiling the entire Lua 5.2.2 VM to _javascript_ here, we aren't compiling specific Lua code into specific _javascript_ code. Although, we are trying to keep the syntax close, so

  js.new.Object(...)

in Lua instead of

  new Object(...)

So it might look like we are translating it directly even if that is not the case.

- Alon

On Sun, Jun 2, 2013 at 3:55 PM, PythonicLuiacOutlook <pythonicluiac@outlook.com> wrote:

Is it even possible to translate Lua to _javascript_?(I'm new to Lua, so I'm most likely to be wrong.

--- Original Message ---

From: "Alon Zakai" <alonzakai@gmail.com>
Sent: 2 June 2013 23:52
To: "Lua mailing list" <lua-l@lists.lua.org>
Subject: Re: lua.vm.js - Lua VM, on the Web

So far I ended up with

  js.new.WebSocket(...)

which I kind of like. Do you prefer a different syntax over that one?

- Alon

On Sun, Jun 2, 2013 at 1:40 PM, Nicolas <nicolas@net-core.org> wrote:

On 02 Jun 2013 18:10:18 +0200

Alon Zakai <alonzakai@gmail.com> wrote:

> That's a missing feature, I forgot about that. Should be easy to add
> though. How about an api like
>
> js.new('WebSocket', arg1, arg)
>
> which will call   new WebSocket(arg1, arg2)?

Sounds god, hum perhaps even better looking would be:
js.global.WebSocket.new(...)
If you can have some smart metatable on it it could work
Or at least:
js.new(js.global.WebSocket, ...)

?

> - Alon
>
>
>
> On Sun, Jun 2, 2013 at 5:00 AM, Nicolas <nicolas@net-core.org> wrote:
>
> > On 01 Jun 2013 03:52:50 +0200
> > Alon Zakai <alonzakai@gmail.com> wrote:
> >
> > > I added the ability to write HTML script tags in Lua, example here
> > > http://kripken.github.io/lua.vm.js/script_example.html
> > > Do "view source" on the page to see the Lua in it.
> >
> > Very nifty (that and the whole thing).
> >
> > Is there support for _javascript_ "new" oeprator?
> > As in if in lua I wanted to do the equivalent of JS "new
> > WebSocket(...)" I tried with a js.run() call but it returned 0
> > instead of the websocket
> >
> > >
> > > - Alon
> > >
> > >
> > >
> > > On Thu, May 30, 2013 at 11:31 AM, Alon Zakai <alonzakai@gmail.com>
> > > wrote:
> > >
> > > > Hi everyone,
> > > >
> > > > I'd like to present lua.vm.js, a new project that ports the Lua
> > > > VM to _javascript_ using Emscripten. The goal is to get the full
> > > > Lua language running on the web, so people can use Lua there.
> > > >
> > > > main page: http://kripken.github.io/lua.vm.js/lua.vm.js.html
> > > > repl: http://kripken.github.io/lua.vm.js/repl.html
> > > > blogpost with more details:
> > > >
> > http://mozakai.blogspot.com/2013/05/lua-in-_javascript_-running-vm-in-vm.html
> > > >
> > > > The idea is that by compiling Lua to asm.js, a subset of
> > > > _javascript_ that is easy to optimize, the Lua VM can run at
> > > > nearly the speed it would run normally on your machine.
> > > > Benchmarks show it can run at about half the speed of a native
> > > > build, which should be more than enough for many use cases I
> > > > think, and this is expected to improve.
> > > >
> > > > Comparison to other approaches for running Lua on the web:
> > > >
> > > > * This is a straightforward compilation of Lua 5.2.2. So no
> > > > effort is needed to recreate all the work done on Lua, we just
> > > > compile it to JS like we would compile it to x86 or ARM, and
> > > > get the full language "for free".
> > > >
> > > > * This uses only standard stuff on the web - _javascript_ - and
> > > > does not require anything nonstandard or proprietary (like
> > > > Flash, NaCl, etc.). So it should run in any modern browser.
> > > >
> > > > * Speed will vary by browser, depending on the power of the JS
> > > > engine on this type of code (you can run a benchmark on the main
> > > > page in those links). The half native speed figure from before
> > > > is what I get on my machine, running Firefox nightly. But even
> > > > if it is less fast on another browsers, the good thing about
> > > > the JS speed race is that they all get faster in order to match
> > > > whichever is better at something, so I would expect this to
> > > > become fast everywhere.
> > > >
> > > > Hopefully this project will be interesting to people. It would
> > > > be great to get feedback and help from Lua users and developers
> > > > to improve it and make it something that's useful for people.
> > > >
> > > > - Alon Zakai
> > > >
> > > >
> >
> >