Re: Thoughts on new syntax for toclose

[Sean Conner <sean@...>]

  <toclose> could be more useful.  In the past, I used to have this
function:

	local function dir(path)
	  local dir = fsys.opendir(path)
	  return function(d)
	    return d:next()
	  end,dir
	end

But that would keep the directory open until the next garbage collection and
sometimes, that wasn't enough to keep from exhausting the open file limit.
The code now will close the directory upon reaching the end:

	local function dir(path)
	  local dir = fsys.opendir(path)
	  return function(d)
	    local e = d:next()
	    if not e then d:__gc() end
	    return e
	  end,dir
	end

It would be nice to have the __close method called at the end of the
interation, but alas, this:

	local function dir(path)
	  local <toclose> dir = fsys.opendir(path)
	  return function(d)
	    return d:next()
	  end,dir
	end

does not work---the directory is *immediately* closed before the iteration
starts.  It's in the context of iterators that I would love to use
<toclose>.

  -spc