Function Dune::XT::Common::isinf

template<class T>
bool Dune::XT::Common::isinf(T val)

forward to std::isinf for general types, overload for complex below

template<class T>
bool Dune::XT::Common::isinf(std::complex<T> val)

override isinf for complex here so it doesn’t bleed into the std namespace