Re: Convenience require (resend)
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- Subject: Re: Convenience require (resend)
- From: Sean Conner <sean@...>
- Date: 2016年6月12日 20:57:56 -0400
It was thus said that the Great Soni L. once stated:
> (Hopefully it sends correctly this time)
>
> We currently have raw requires, which means we do things like
>
> local a = require"io.github.soniex2.a"
> local b = require"io.github.soniex2.b"
> local c = require"io.github.soniex2.b.c"
> -- use a, b and c normally
>
> Instead of that, is there a module or something that lets me do
> something like
>
> local soniex2 = reqpath"io.github.soniex2"
> local a = soniex2("a") -- alternatively, `soniex2.a()`
> local b = soniex2("b") -- alternatively, `soniex2.b()`
> local c = soniex2("b.c") -- alternatively, `soniex2.b.c()`, with the
> call at the
> -- end for disambiguating between module and
> path, and
> -- setting an __index is not an option as the
> module
> -- could already have its own __index (or not be a
> -- table at all; some modules return functions!).
> -- use a, b and c normally
>
> I think it looks nicer.
On second thought, it should be easy enough to implement (untested):
function reqpath(path)
return function(module)
return require(path .. "." .. module)
end
end
or
local mt_reqpath = {}
function my_reqpath:__index(key)
table.insert(self.path,key)
return self
end
function my_reqpath:__call(...)
table.insert(self.path,1,self.base)
local path = table.concat(self.path,".")
self.path = {}
return require(path)
end
function reqpath(path)
return setmetatable(
{ base = path , path = {} },
my_reqpath
)
end
-spc (Wait a second ... why am I doing your homework again? 8-P