more functions for complex

From: nbecker_at_[hidden]
Date: 2001-12-06 10:16:13

We can use more functions related to complex types.  Here's one handy
one:

template<typename func, typename flt>
inline std::complex<flt> ComplexApply (func f, std::complex<flt> x) {
  return std::complex<flt> (f (real (x)), f (imag (x)));
}

Can bind do this?