Re: [proposal] close file on io.lines("filename", "*a")()

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

On 2019-07-30 11:49 a.m., nobody wrote:
> On 30/07/2019 16.42, Soni "They/Them" L. wrote:
> > since lua doesn't have refcounting and some ppl wanna do basically 
> > io.open(file):read("*a") I wanna propose io.lines("filename", "*a")()
> > (or alternatively io.lines("filename", "*a", "*l")) should close the
> > file as if the iterator ran out.
>
> function readfile( name )
>   local <toclose> f, err = io.open( name, "r" )
>   if not f then  return nil, err  end
>   return f:read "*a"
> end
>
> (or something like that) should work, right?
>
> Sometimes it actually makes sense to read '*a' and then seek back and
> read(/write) again…
>
> -- nobody

sometimes you don't wanna leak file descriptors which you can only have 
about 1000 or so per user or something I might be off by an order of 
magnitude or so but you get the idea.