Re: round-off error in std::pow(std::complex<T>, double) in C++11

["John W. Eaton" <jwe at octave dot org>]

On 01/25/2013 01:54 PM, Marc Glisse wrote:

> Implementing this optimization in the compiler when the exponent is a
> compile-time constant seems like a good and simple idea in any case :-)

If that was done, would a function like

  bool foo (std::complex<double>& x, int y)
  {
     return std::pow (x, y) == std::pow (x, 2);
  }

maybe return fals if called with y = 2, assuming the compiler could not 
determine the value of y at compile time?

That seems like a bad feature to me.

jwe