[boost] complex conversions

From: Neal D. Becker (nbecker_at_[hidden])
Date: 2002-06-18 12:51:58

There are various deficiencies in std::complex in the sense that not
all conversions that might be expected are supported.  Perhaps boost
could add a library to help make this a little easier.

Here is an example of a useful function that can be added without
changing std::complex:

template<typename flt1, typename flt2>
inline std::complex<flt1> ComplexCvt (std::complex<flt2> z) {
  return std::complex<flt1> (real (z), imag (z));
}

Another area that needs help is interoperation of complex<flt1> with
complex<flt2>, and also with flt3 (scalar).  For example:

complex<double> x * 2

I don't know if this latter issue can be addressed without
modification to std::complex, however.