[std.database]

[Adam Ruppe]

Andrei Alexandrescu wrote:
> The database engine should be codified in the connection string, 
> not in the type name. 

Why?

If it's in the type, you can trivially specialize for different
engines and get static checking for functions not supported
across them all, or runtime checking if you prefer.

You can also change the constructors to make it clear what
is being created.