couldn't we keep complex number literals?

[Trass3r]

I'm not completely sure how AAs are implemented now, but I think I read  
it's somewhat outsourced to druntime. At least there's that struct  
AssociativeArray(Key, Value) there.

Couldn't we do something similar with complex numbers?
Like moving the struct Complex(T) implementation that currently resides in  
std.complex to the runtime, removing the types (creal etc.), adding them  
as aliases there and providing some slight syntactic sugar so that complex  
number literals 5 + 3i are mapped onto a Complex instance?

I think that would be an ideal solution, wouldn't it?