Re: [ANN] Lua 5.2.0 (work1) now available
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- Subject: Re: [ANN] Lua 5.2.0 (work1) now available
- From: Ignacio Burgueño <ignaciob@...>
- Date: 2010年1月08日 23:05:05 -0200
On 08/01/2010 18:49, Luiz Henrique de Figueiredo wrote:
All feedback welcome. Thanks.
--lhf
1) __len metamethod is allowed to return anything besides numbers.
local array = {1,2,3,4,5}
setmetatable(array, { __len = function() return "hi there" end })
local length = 20 + #array -- attempt to perform arithmetic on a
string value
Checking each time that the result is a number may be expensive. Perhaps
adding an api_check ?
2) package.searchpath
I once requested a way for required package to know where they were
found. I thought that this might be possible using package.searchpath
but it doesn't.
Say I have a package called "foo.bar" (that is, the file "bar.lua" in
the directory "foo")
It is accessible in the path, so require "foo.bar" works.
But in foo\bar.lua, this won't work.
print(package.searchpath((...))) -- gives an error, looks for "foo.bar"
instead of "foo\\bar"
Is it possible for searchpath to deal with package names also? I could
do that in Lua, but I will be rewriting what the Lua loader is doing.
Regards,
Ignacio