On Mon, Jun 8, 2015 at 2:09 PM, Soni L. <fakedme@gmail.com> wrote:
On 08/06/15 06:05 PM, Soni L. wrote:
I wish you could access your own locals with an _LOCAL[idx] that would be
faster than debug.getlocal...
Not sure how that'd work if you local x = _LOCAL, or called a function with
_LOCAL...
Actually I do know, _LOCAL tables would be like any other tables, but
heavily optimized for this kind of stuff, and it'd be part of the function's
call stack entry thingy. The GC can take care of the rest.
function locals()
return setmetatable({ [0]={} }, {
__index = function(t, k)
local ki = t[0][k]
assert(ki, "attempt to read nonexistent local")
local ln, lv = debug.getlocal(2, ki)
assert(ln == k, "inconsistent state")
return ln
end,
__newindex = function(t, k, v)
local ki = t[0][k]
if not ki then
local i = 0
while true do
i = i + 1
local ln, lv = debug.getlocal(2, i)
if ln == k then
ki = i
break
elif not ln then
break
end
end
assert(ki, "attempt to assign nonexistent local")
end
debug.setlocal(2, ki, v)
end
})
end
_LOCAL = locals()
Untested... but that's about as good as you're going to get.
/s/ Adam
