Re: [proposal] infix function syntax sugar
[
Date Prev][
Date Next][
Thread Prev][
Thread Next]
[
Date Index]
[
Thread Index]
- Subject: Re: [proposal] infix function syntax sugar
- From: "Dimiter \"malkia\" Stanev" <malkia@...>
- Date: 2011年12月18日 01:09:07 -0800
-- Here is a very poor attempt :)
local function infix(...)
local args = {...}
local nargs = #args
local r = args[1]
for k=2,nargs,2 do
r = args[k](r, args[k+1])
end
return r
end
local function add(a,b)
return a + b
end
print( infix( 12 ,add, 3 ,add, 10 ) )
On 12/17/11 9:23 PM, Xavier Wang wrote:
> hi robero and list,
>
> i'm inspired by the post about implement c enum. somebody said the
> getflags function shoud return a userdata to implement a contains
> function. i think its a good idea, excerpt a details: thus will allocate
> memory.
>
> i'm run lua on a embedded system， embedded systemembedded system, nokia
> n73 cellphone. my game will lag if i allocate memory in draw function
> since the garbage collection. so we avoid any memory in event loop. but
> i really miss the contains function, so i think a syntax allow use
> function as infix operator will be great.
>
> e.g. if i have a function add(a, b), i can call it with a ｀add｀ b, its
> a syntax sugar of add(a,b)
>
> its very simple and can used in many situations, e.g. bitop calls, and
> flags contains test.
>
> has anybody agree me? i hope this feature can appear on lua5.3 :)
>
> thanks everybody~
>