Re: [Boost-users] g++ warning: comparing floating point with == or!= is unsafe

"David Abrahams" wrote in message news:uvepgcdv8.fsf@boost-consulting.com...

cybernet@interia.pl writes:

...

In: /usr/include/boost/test/floating_point_comparison.hpp

inside:

template<typename FPT> inline FPT safe_fpt_division( FPT f1, FPT f2 ){

the warning is cause by the code:

// Avoid underflow. if( f1 == static_cast<FPT>(0) || f2 > static_cast<FPT>(1) && f1 < f2 * (std::numeric_limits<FPT>::min)() ) return static_cast<FPT>(0);

Could someone modify the code to allow it to compile without warnings on g++?

Try replacing

f1 == static_cast<FPT>(0)

with

f1

I am not sure that it will be 100% equivalent for all FP types including user defined. Gennadiy