require "module" "feature" - syntax

[askok@...]

There's been discussion about initializing only certain 
parts of a module, or initializing it in a certain way.

I just came to try whether the title syntax would work, 
and it does!

    require "module""feature"
    require "module"{ "feature1", "feature7" }

Has anyone used this already (is this old stuff?) and is 
there any downsides to it?  The idea would be for 
'require' to attach a '__call' metamethod to the table it 
returns, which would in turn handle string and 
table-of-strings to initialize certain parts of the 
system.

> function a() return function(str) print(str) end end
> a"hey"("hh")
hh
> a"hey" "hh"
hh
> a"hey""hh"
hh
> a"hey"{ "hh", "uu" }
table: 0x309e20
>

-asko