LuaD: creating a flexible data filter system

[Jakob Ovrum via Digitalmars-d-learn]

On Friday, 16 October 2015 at 09:01:57 UTC, yawniek wrote:
> hi,
>
> i'm reading in a stream of data that is deserialized into 
> individual frames.
> a frame is either of:
> a)  a specific D datastructure ( struct with a few 
> ulong,string,string[string] etc members), known at compile time
> b) json (preferably stdx.data.json)
>
> i now want to implement something where i can dynamically
> add lua filters that then get data out of these frames, create 
> a new lua object
> send it back to D code where its either sent to another lua 
> filter or at last
>  being serialized again to json und then being processed 
> further.
>
> ideally i would not like to copy all the data into a lua object 
> but directly access it
> from lua.
> is there an elegant approach to do this and support both a and 
> b cases?
>
> so far i did some benchmarks, mainly with string comparisons 
> and it turned out
> that luaD is about 10x faster than mruby and python D bridges.

The class support in LuaD supports the kind of indirection you 
want, but it's probably not finished enough for your use case. 
Once closer to completion, it will be possible to use it with 
structs as well.