Inline aggregate types

[Ethan Watson via Digitalmars-d]

On Friday, 2 December 2016 at 10:16:17 UTC, Jacob Carlborg wrote:
> Using an alias without a template constraint works for me.

I was attempting to support all methods. new class isn't the 
cleanest way of doing things either, so I decided I'd support all 
the things and let the user choose what they're comfortable with.

But I did derp a bit, and realised that I could have just changed 
the string mixin method to not invoke the main template with 
typeof( return value ).

Thus:

mixin template BitPack( alias Descriptor, string NameAlias = 
typeof( Descriptor ).stringof )
{
   mixin( GenerateBitPackBody!( typeof( Descriptor ), NameAlias 
)() );
}

mixin template BitPack( string ElementDescriptor, string 
NameAlias = "BitPackData" )
{
   mixin( "mixin BitPack!( { struct BitPackData { " ~ 
ElementDescriptor ~ " } return BitPackData.init; }(), NameAlias 
);" );
}

Works for both string definitions and inlined new class 
definitions.