[r6rs-discuss] incorrect result in example for expt

[William D Clinger]

In the specification of expt in R6RS section 11.7.4.3,
the following example is incorrect:

    (expt 0 5+.0000312i)   =>  0

Implementations	are required to return an inexact
result for that example, following the general rule
stated in R6RS section 11.7.1:

    The general rule is that the generic operations...
    return an inexact result when any argument is
    inexact.

The example does not fall within the general exception
to that rule (stated in	the paragraph following	the
general	rule) because (expt 0 0) is 1 but (expt 0 1)
is 0.  Since the value of the second argument affects
the result, passing an inexact value for the second
argument mandates an inexact result.

Will