Re: require "module" "feature" - syntax

[Tomas <tomas@...>]

	Hi Asko

> 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.
	I think `require' returns everything the module returns or
what is defined in package.loaded[module_name].  If the module calls
`module' and does not return anything explicitly, then the result will
be `require' returning the new table/environment defined by `module'.
	That said, you could achieve the desired behavior by simply
returning the function you mentioned.  Something like:

module"my_mod"

...

return function (list)
	if type(list) == "string" then
		return _M[list]
	elseif type(list) == "table" then
		...
	end
end

	I think it should not be dificult to build a generic function
which could be used simply by any module:

return features

	Regards,
		Tomas