Re: 5.1 beta and closing files

[Roberto Ierusalimschy <roberto@...>]

> This means that code like this (from luasocket)
> 
 > a,b,c= h.request{url="http://www.acme.com/index.html",sink=
> ltn12.sink.file(io.stdout)}
> 
> will close stdout in 5.1 whereas in 5.0.2 it did not.

I may be wrong, but I think a library function should not close a file
that it did not open.


> Would it be possible to have [...] an io flag that sets the old behaviour?

-- untested code
do
  local old_close = io.close
  io.close = function (f)
    f = f or io.output()
    if f == io.stdin or f == io.stdout or f == io.stderr then
      return
    end
    return old_close(f)
  end
end
  
-- Roberto