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- Subject: Re: Assigning to a constant variable with function definition syntax doesn't error
- From: "Soni \"They/Them\" L." <fakedme@...>
- Date: Thu, 17 Jun 2021 18:57:20 -0300
On 2021-06-17 1:32 p.m., Francisco Olarte wrote:
> On Thu, Jun 17, 2021 at 5:35 PM Domingo Alvarez Duarte
> <firstname.lastname@example.org> wrote:
> > Isn't this the general pattern in Lua to always create a new variable
> > and shadow any existing one with the same name, without telling anything
> > to the user ?
> function x() does not create a new variable, it uses a created one (
> either local or global, although you may consider the global one as
> "created" )
> The problem is:
> $ cat u.lua && lua u.lua
> local x <const> = nil
> function x() end
> local y <const> = nil
> y = function() end
> lua: u.lua:5: attempt to assign to const variable 'y'
> Coupled with the definition in 3.4.11
> The statement
> function f () body end
> translates to
> f = function () body end
> Which mean they should both pass or fail. No new vars created by the
> function lines, which will be the case if "local function" where used.
> Francisco Olarte.
We guess there's no way to make safe self-referential functions in Lua?
local function x <const>() end -- doesn't work