Re: Is there anyway to make a new Lua closure sharing the same code with old one but with different env table?
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- Subject: Re: Is there anyway to make a new Lua closure sharing the same code with old one but with different env table?
- From: Henk Boom <henk@...>
- Date: 2010年6月21日 16:35:49 -0400
On 21 June 2010 08:48, Kristofer Karlsson <kristofer.karlsson@gmail.com> wrote:
> function functionfactory()
> local upvalue1, upvalue2
> return function()
> return upvalue1 + upvalue2
> end
> end
>
> local clone1 = setfenv(functionfactory(), env1)
> local clone2 = setfenv(functionfactory(), env2)
>
> clone1 and clone2 now shares prototype and upvalues, but have different
> environments
Actually, each of the returned functions have their own upvalues, they
aren't shared. If you lifted "local upvalue1, upvalue2" out of
functionfactory, then they would be shared.
henk