polymorph.d: polymorphic refcounted wrappers for D structs

[Nordlöw via Digitalmars-d]

On Saturday, 14 May 2016 at 12:25:30 UTC, Lodovico Giaretta wrote:
> I wrote this small module ( 
> https://github.com/lodo1995/polymorph.d ), taking inspiration 
> from Amaury Sechet's great talk at DConf ( 
> http://dconf.org/2016/talks/sechet.html ).

Somewhat related are my lightweight variant implementations

- `WordVariant` at

https://github.com/nordlow/phobos-next/blob/master/src/variant_ex.d#L49

and

- `VariantPointerTo` at

https://github.com/nordlow/phobos-next/blob/master/src/variant_ex.d#L258

They both use the upper bits of a word (currently 64-bit only) 
for type-information. See the unittest for details on usage.

The `WordVariant` was needed in my implementation of a 
high-performance and memory efficient pure D implementation of 
prefix-trie at

https://github.com/nordlow/phobos-next/blob/master/src/trie.d

It will provide flexible use of memory, either using the GC or 
not. It's also, when possible, always @safe pure nothrow.

The trie is very much in development right now, but I will 
announce its presence as soon as it stabilizes.