On Mon 31 Jan 2011 21:26, Mark H Weaver <m...@netris.org> writes: > For example, although (expt -1.0 2) yields 1.0, (expt -1 2.0) yields > 1.0+0.0i, which is not `real?' according to the R6RS. The R6RS requires > that `real?' return #t only if the imaginary part is an _exact_ 0. > > Note that operations requiring reals, including the comparison operators > `<', '>', '<=' and '>=' will raise an exception if applied to these > numbers. However, I made sure that `inexact->exact' would ignore an > inexact zero imaginary part. > > I don't expect this to be a problem, since anyone raising a negative > number to an inexact power should expect that the result may not be > real. > > What do you think?
Sounds sane to me. Andy -- http://wingolog.org/
