Re: _SELF and _SUPER
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- Subject: Re: _SELF and _SUPER
- From: Sean Conner <sean@...>
- Date: Sat, 6 Aug 2016 16:30:56 -0400
It was thus said that the Great Soni L. once stated:
> On 06/08/16 06:19 AM, Tim Hill wrote:
> >
> >A more interesting question .. why do you need this? And, for your
> >need, have you explored other ways to solve the problem within the
> >existing Lua language?
>
> I've used recursive pseudo-anonymous functions before. _SELF would make
> them easier to use.
>
> f((function()
> local function inside_anonymous(args, I, should, take)
> end
> return inside_anonymous
> end)())
You just need a Y-combinator:
function Y(f)
local function g(...) return f(g,...) end
return g
end
print(Y(function(rec, x)
if x < 2 then
return 1
else
return x * rec(x-1)
end
end)(5))
That will allow you to call an anonymous function recurively from within
the anonymous function. No need for _SELF in this case.
-spc (Now, about that _SUPER ... )