Simon Peyton-Jones said: > But since the read may block, it matters *when* you perform it. > For example if you print "Hello" and then read the IVar, you'll > block after printing; but if you read the IVar and then print, the > print won't come out. If the operation was pure (no IO) then you'd > have a lot less control over when it happened.
But this is true of any expression in a non-strict language. Why the special treatment of IVars? Nikhil
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