On 3/14/13 6:45 AM, Andrea Fontana wrote:
On Thursday, 14 March 2013 at 10:08:53 UTC, Andrea Fontana wrote:
I'm trying to implement a db cursor as simple InputRange. I can't
implement as forward range because using c-api I can't clone/save cursor.

I wrote popFront() front() and empty() method and my range works fine.

Using on a foreach() it browses all elements inside range until range
is exausthed.

If i do another foreach() it doesn't restart (empty() is called and it
returns true, of course).

Is it the correct behaviour of a inputrange or have i missed something?

Maybe I got it. I implemented this range as class, so it is passed as
reference to foreach, usually ranges are struct and passed by value. I
guess this is the problem.

Is there a way to make a class based range like a struct one?

Add .save() to it.

Andrei

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