Type sequence concatenation / associative array implementation

[user1234]

On Wednesday, 12 February 2020 at 20:58:49 UTC, Marcel wrote:
> Hello!
> I have two questions:
>
> 1- How can I concatenate two type sequences?

alias Concatenated = AliasSeq!(TList1, TList2);

or maybe

alias Concatenated = AliasSeq!(TList1[0..$], TList2[0..$]);

since I don't remember if they nest or not.

> 2- How is the builtin associative array implemented? I think I 
> read somewhere it's implemented like C++'s std::unordered_map 
> but with BSTs instead of DLists for handling collisions: is 
> this correct?

see druntime source.