Streams, ownership and observability

[pphaneuf]

Something that always bothered me while programming with WvStreams was how everything had to be a stream. Well, I actually, I had demonstrated how it could be avoided, but it was a rather contrived idea where there was a free-floating object, not clearly owned by anyone, but which registered with the close callback of a stream, where it then

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[azrhey]

and now for more serious stuff :