[m-dev.] for review: stream I/O

[Michael Day]

> Also, I don't see why I need to involve the io__state when I'm setting up,
> say, a string stream.

You don't - if string is an instance of one of the stream type classes
then you can read or write to it directly, pass it in where a stream is
expected, whatever. No set up should be required. (Though given the
efficiency concerns of appending to strings maybe this will change).

Michael


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