Re: setfenv/getfenv
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- Subject: Re: setfenv/getfenv
- From: "A.S. Bradbury" <asb@...>
- Date: 2010年1月12日 17:02:28 +0000
2010年1月12日 Dravonk <dravonk@yahoo.de>:
> Daniel Silverstone schrieb:
>> So this would be blah = loadin(pathtoscript, envtab) rather than blah =
>> loadfile(pathtoscript) setfenv(blah, envtab) ? That seems emminently
>> reasonable and pleasant to use.
>
> It would be
> file = assert (io.open (path))
> source = file:read ("*all")
> file:close ()
> func = loadin (env, source, "@"..path)
>
> But in order to address the "reuse"-issue again, with loadin() it would
> only be easy to reuse the source and compile the function each time again.
I may be missing something, but does this solve the multiple reuse problem?
function multienv(funcstr)
return loadstring([[
return function(_G)
in _G do
return function()
]]..funcstr..[[
end
end
end
]]
)()
end
> funcwrapper = multienv("print(foo)")
> funcwrapper({print=print, foo="hello"})()
hello
Alex