Re: [ANN] LuaFileSystem 1.8.0

[Dibyendu Majumdar <mobile@...>]

On Fri, 24 Apr 2020 at 07:42, Hugo Musso Gualandi
<hgualandi@inf.puc-rio.br> wrote:
>
> Em qui, 2020-04-23 às 22:14 +0100, Dibyendu Majumdar escreveu:
> > On Thu, 23 Apr 2020 at 02:30, Hisham <h@hisham.hm> wrote:
> > > For example, with `uname -n` set below 10000, this script crashes
> > > on
> > > Lua < 5.4, and works in Lua 5.4:
> > >
> > > local lfs = require("lfs")
> > > for t = 1, 10000 do
> > >    local i = 0
> > >    for e in lfs.dir("/usr/lib") do
> > >       i = i + 1
> > >       if i == 100 then
> > >          break
> > >       end
> > >    end
> > > end
> > >
> >
> > Out of interest, how would you have written this in older versions of
> > Lua?
>
> IIRC, the most most direct workaround was to manually call
> collectgarbage in order to run the iterator's __gc metamethod. The
> performance is not ideal though.
>

Looks like the api is badly designed since looking at the code above
you can't tell that a close is required.
I have argued against an implicit close in a for loop for exactly this reason.
How can you tell what this code is doing?
It will behave differently in 5.4 silently.
Other languages all have explicit constructs for this kind of thing.

Regards
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