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On 06/08/16 06:19 AM, Tim Hill wrote:
On Aug 4, 2016, at 9:54 AM, Soni L. <fakedme@gmail.com <mailto:fakedme@gmail.com>> wrote: 

Can we get _SELF and _SUPER?

local x = 1
function f()
  local x = 2
  print(_SUPER.x) --> 1
end
print(f())

pcall(function(x)
  if x < 0 then error() end
  if x == 0 then return end
  print(x)
  _SELF(x-1)
end, 3) --> 3; 2; 1;
For performance, they would be translated by the compiler. Passing _SUPER around would copy all upvalues into a table, but for simplicity changing this table wouldn't change upvalues (e.g. no current syntactic construct can create a metatable). 

_SELF and _SUPER would be indexable and callable.

(No idea what to say next. Idk, I'm just rambling I guess .-.)
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? 

For example, _SELF for functions is trivial…

do
local _SELF = function() … end
x = _SELF
end

—Tim




Well, you actually need to use "local function _SELF"

Also:

do
local function _SELF() print(_SELF) end
x = _SELF
_SELF = nil
end

x() --> nil

While a proper _SELF would be safe from such things.
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)())

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