Re: string.gsub accepting a callable userdata
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- Subject: Re: string.gsub accepting a callable userdata
- From: steve donovan <steve.j.donovan@...>
- Date: 2012年12月13日 10:45:59 +0200
On Thu, Dec 13, 2012 at 9:47 AM, Wesley Smith <wesley.hoke@gmail.com> wrote:
> Couldn't you just use a table as a proxy for userdata via __index?
> It's not ideal to have to proxy, but you could easily make a wrapper
> function so that you can pretend it's not happening :)
That does work - gsub respects __index, which is nice (I had to check this)
Best global solution in such a situation is the following monkey patch:
local gsub,type = string.gsub,type
function string.gsub(s,pat,repl)
if type(repl) == 'userdata' then
local obj = repl
repl = function(...) return obj(...) end
end
return gsub(s,pat,repl)
end