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

[Thijs Schreijer <thijs@...>]

> On 4 Jun 2019, at 21:27, Patrick Donnelly <batrick@batbytes.com> wrote:
> 
> On Wed, May 29, 2019 at 5:38 PM Luiz Henrique de Figueiredo
> <lhf@tecgraf.puc-rio.br> wrote:
>> 
>> 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
> 
> \o/ toclose! (I'll echo that a more Luaish syntax would be preferred
> but I trust the Author's judgement on this.)
> 
> I thought I'd also share that another useful local qualifier would be
> <static>. This would be a variable scoped as normal but is initialized
> once when the surrounding closure is created. i.e.:
> 
> function foo(...)
>  local <static> cache = {}
> end
> 
> is syntactic sugar for:
> 
> do
>  local cache = {}
>  function foo(...)
>  end
> end
> 
> -- 
> Patrick Donnelly
> 

What happens if I do:

function foo(…)
 print(cache)
 local <static> cache = “something”
 cache = cache .. ”.”
end

foo()
foo()

I prefer the traditional Lua idiom because it is more explicit.