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This library implements the superset of the interface described in
* A Monadic Framework for Delimited Continuations,
R. Kent Dybvig, Simon Peyton Jones, and Amr Sabry
JFP, v17, N6, pp. 687--730, 2007.
http://www.cs.indiana.edu/cgi-bin/techreports/TRNNN.cgi?trnum=TR615
This library is the most direct implementation of the bubble-up reduction
semantics of multi-prompt delimited control. The library stands out in not
being based on the continuation monad. Rather, the monad of Control.Monad.CC.CCExc
is an extension of the Error monad: a monad for restartable exceptions.
The library offers not one monad transformer but a family (CCp)
parameterized by the prompt flavor p . The library defines several prompt
flavors; the users are welcome to define their own.