Re: Say No to global-by-default (summary of the discussion)

[Thomas Jericke <tjericke@...>]

> Globals-backslashed style should be optional.
And then you have to convert code parts when you move them between files 
of a single code base.

While I would like to have nothing by default, I don't like this 
solution at all. It changes every single access to globals.
Also while it solves typos when accessing locals the compiler still 
doesn't check any access of globals when using \.

Roberto once suggested that globals have to be declared as well. So you 
have to declare which globals you want to use, and if you declare no 
globals at all, Lua would act like it does now (allow any access).

I have some ideas that something like a compiler pragma or a declaration 
block would work nicely. But they are just random ideas. I think others 
have suggested this already. Something like

local print = print
local t = {}
table.insert(t, 1) -- OK
local do - -"do local" would be less yoda speak but I think that is 
already valid syntax
    print "hello" -- OK
    table.insert(t, 1) -- error table isn't local
end
table.insert(t, 1) -- OK

--
Thomas