Re: [ANN] Lua 5.4.0 (alpha-rc1) now available

["Soni \"They/Them\" L." <fakedme@...>]

On 2019-05-30 1:15 p.m., Xavier Wang wrote:
> Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br 
> <mailto:lhf@tecgraf.puc-rio.br>> 于2019年5月30日周四 上午8:38写道：
>
>     Lua 5.4.0 (alpha-rc1) is now available for testing at
>     http://www.lua.org/work/lua-5.4.0-alpha-rc1.tar.gz
>     All feedback welcome. Thanks.
>     --lhf
>
>
> Hi Luiz, is there any plans to support <toclose> and <const> (i.e. the 
> annotation syntax) on the function parameters?
>
> e.g.
>
> function foo(<tobeclose> f, <const> cfg)
>   -- use f and cfg
> end -- the f will be close and cfg can not modify in the function body
>
> the most way to use "const" in C is use it as function parameter 
> qualifier. So does Lua plan to support it?

Lua is nice in that it supports shadowing. So you can just do:

function foo(f, cfg)
  local <tobeclose> f = f
  local <const> cfg = cfg
end

> P.S. the new syntax is ugly, indeed :-(
>
>
> --
> regards,
> Xavier Wang.