Send Beginners mailing list submissions to
beginners@haskell.org
To subscribe or unsubscribe via the World Wide Web, visit
http://www.haskell.org/mailman/listinfo/beginners
or, via email, send a message with subject or body 'help' to
beginners-requ...@haskell.org
You can r
type `b'
`b' is a rigid type variable bound by
the instance declaration at gcbTestBad.hs:8:19
In the expression: b / (2 * pi)
In the definition of `div2pi': div2pi (Foo b) = b / (2 * pi)
In the instance declaration for `TwoPi (Foo b)'
What is
