Re: local var <const>
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- Subject: Re: local var <const>
- From: Sergey Kovalev <kovserg33@...>
- Date: Wed, 9 Oct 2019 22:14:00 +0300
I think there is no need in const at all.
function ups(nane <const>)
print("name=",name) -- mistype in argument name
end
ups "name"
I see no real application for const in dynamic language like lua
local t <const> = { x=1 }
t.x=2 -- wtf?
If you need const. It could be emulated in runtime using metatables:
function const(c)
return setmetatable({},{__index=c,
__newindex=function(t,n,v) error "const is read only" end
})
end
local my = const { x=1, y=2, e=2.71, pi=3.14, person=const { name="a", age=1 } }
print(my.pi)
ср, 9 окт. 2019 г. в 21:15, Egor Skriptunoff <egor.skriptunoff@gmail.com>:
>
> On Wed, Oct 9, 2019 at 8:25 PM Pierre Chapuis wrote:
>>
>> > Constant variables help reasoning about the code, but I think the
>> > current syntax is a bit verbose, and may limit its adoption.
>> > A concise syntax that declares the const property may ease its adoption. For
>> > example: `const var = whatever`
>>
>> For what it's worth, I agree with this.
>>
>
>
> +1