NumericUtils.h

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#ifndef LARCOREALG_COREUTILS_NUMERICUTILS_H
#define LARCOREALG_COREUTILS_NUMERICUTILS_H

// C/C++ standard libraries
#include <type_traits>


namespace util {
  
  // @{
  template <typename A, typename B>
  constexpr auto absDiff(A const& a, B const& b)
    {
      static_assert(
        std::is_same<std::decay_t<A>, std::decay_t<B>>(),
        "Arguments of util::absDiff() have to be of the same type."
        );
      return (b > a)? (b - a): (a - b);
    }
  // @}
  
} // namespace util


#endif // LARCOREALG_COREUTILS_NUMERICUTILS_H