D to Javascript converter (a hacked up dmd)

[Dmitry Olshansky]

On 29.02.2012 21:58, Adam D. Ruppe wrote:
[...]
>
> 4) This is an insane idea, but one that came to mind.
> I'm testing this by piping the generated JS into
> dmdscript.
>
> dmd runs insanely fast when compiling this code. Phobos
> is kinda slow to compile, but you don't have to use it
> here. Write D1 style code and dmd is blink of an eye.
>
> dmdscript is reasonably fast too.
>
>

As someone that spent quite some time porting and fixing dmdscript I 
humbly suggest using Google's standalone version of v8.

I mean I've done benchmarking, and it was like 20-200x times slower 
depending on the things you do. For one hashtables are the bottleneck, I 
though of reworking them but lost interest along the way. The other 
problem is FP speed since JS uses double for eveerything. dmd used FP 
stack for double back then, probably now it uses SSE(?).

>
> Suppose you're writing an app and you want a scripting
> extension. Embed dmdscript, boom you can use javascript.
>
> (I really want to revive a dmdscript D2 port to make this
> even easier, but it isn't hard right now either.)
>

You can try where I stopped it's still on D source, though I should 
probably upload that on github.
If you are serious about dmd I would recommend it, as I've spent weeks 
to figure out proper try/catch/finally implementation and fix closures 
that were broken.

Last thing I vaguely recall is building it with 2.055 or 2.056, and 
moving deprecated parts of phobos into it.

>
> What if you want to script in D? If you're GPL... embed
> dmd front end too.
>
>
> Make D output JS, which is interpreted by D, calling
> D apis....
>
>
> Pretty insane, but you could script your app in D without
> doing shared libraries or anything like that!
>

Indeed, but who knows ;)
>
>
> Compared to cases 1-3 though, this is silly. Just a thought
> that came to mind.
>
>
>
> The web app use case is strong though. I think I'll actually
> use this thing.


-- 
Dmitry Olshansky