[erlang-questions] Erlang VM in Rust

Thom Cherryhomes <>
Wed Sep 13 03:47:08 CEST 2017


For a language that purports to be a replacement for low-level systems
programming, Rust not having bitfields or unions, would be a real pain in
the ass to do any intricate hardware driver work... I'm guessing that Rust
is designed by 20-somethings who have never done a line of assembler in
their lives?

sigh.
-Thom

On Tue, Sep 12, 2017 at 3:25 PM Dmytro Lytovchenko <
> wrote:

> I tried to begin once.
>
> Here's the catch:
>
>    - Rust had no unions at the time of my experiments (added in 1.19 -
>    July 2017)
>    - Rust has no bit fields (some libraries exist trying to alleviate
>    this)
>    - Erlang process heap is created and maintained by abusing pointers
>    and bits in them. Casting integers to pointers and back i believe is
>    possible but will give you some pain.
>    - A really fast VM loop is done using C/C++ goto (void*) extension, in
>    Rust you will probably have to use old good switch/case (slower)
>
> When you overcome these base problems, it should be possible to proceed
> carefully :)
>
> 2017-09-12 22:10 GMT+02:00 austin aigbe <>:
>
>> Hello,
>>
>> Any consideration for implementing the Erlang VM in Rust?
>>
>> Regards,
>> Austin
>>
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