On Jun 11, 2014, at 9:24 PM, Thiago L. <fakedme@gmail.com> wrote:
Make it so this is possible:
goto stuff
::label::
print("yay!")
goto exit
::stuff::
f = label
goto f
::exit::
With my computed goto/switch case patch[1] that is possible:
goto stuff
:|label|:
print("yay!")
goto exit
::stuff::
f = "label"
jumpto f
::exit::
As goto labels are only used during compile time I created the :|jumpto|: style label for computed gotos, see my patch documentation for full details.
And this:
t=setmetatable({label1, label2},{__index = function() return default end})
goto t[x] -- errors if t[x] doesn't evaluate to a label
::label1::
dostuff()
-- fall thru
::label2::
domorestuff()
goto exit -- break
::default::
dodefault()
::exit::
switch x
case label1
dostuff()
case label2
domorestuff()
break
else
dodefault()
end
Or, if you prefer:
jumpto or continue on x
goto default
:|label1|:
dostuff()
:|label2|:
domorestuff()
goto exit
::default::
dodefault()
::exit::
Note that no meta-tables or closures were required to implement your example with my patch, you can also probably see why I added sugar for the switch statement, it looks a LOT nicer than the raw computed goto syntax! ;)
~pmd
[1] https://github.com/FizzyPop/lua-patches/tree/master/joint-patches/jump-table%2Bif-shct%2Bcont-loop
