Re: Lua 5.3 JIT

["Soni L." <fakedme@...>]

On 04/03/17 02:52 PM, Dirk Laurie wrote:
> 2017-03-04 18:59 GMT+02:00 szbnwer@gmail.com <szbnwer@gmail.com>:
> > i'm following luajit on the mailing list of it and on github, it's not
> > dead, they are working hard on a lotsa things, but Mike isn't planning
> > to follow everything that appears in lua. there are some forward
> > compatibilities for lua5.2 and 5.3, but it's currently not planned to
> > follow up lua to 5.3
> Impression I got is that _ENV is no-no but almost everything else
> (binary operators, utf8, string.pack etc) has got or will get into LuaJIT.

Write some code to use _ENV on every global access and append `local 
_ENV = _ENV or getfenv()` before everything you load, then replace load().

As in,

print(table.unpack {1,2,3})

becomes

local _ENV = _ENV or getfenv()
_ENV.print(_ENV.table.unpack {1,2,3})

after going through your code.

This is roughly equivalent to 5.2/5.3 semantics. (except for passing 
`nil` to _ENV since setfenv/getfenv don't support nil for some reason... 
maybe setfenv(f, {getfenv=function() returnn nil end}) ? note that this 
solution isn't perfect.)

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