abusing exceptions for continuations

[gangesmaster]

i've had this strange idea of using the exception's traceback (which
holds the stack frame) to enable functional continuations, meaning,
raise some special exception which will be caught by a reactor/
scheduler/framework, which could later revive it by restoring the
frame.

i'm thinking of using the generator's implementation (some minimal
support on the c-side)

has this been tried before? what were the results?


thanks,
-tomer