Function EqualWithSafeRelError

tests/cpu/UnitTestUtils.h:79–100

// avoid large relative differences for small numbers.
template<typename T>
inline bool EqualWithSafeRelError(T value,
                                  T expected,
                                  T eps,
                                  T minExpected,
                                  T* computedError = nullptr)
{
    // If value and expected are infinity, return true.
    if (value == expected) return true;
    if (IsNan(value) && IsNan(expected)) return true;
    const T div = (expected > 0) ?
        ((expected < minExpected) ? minExpected : expected) :
        ((-expected < minExpected) ? minExpected : -expected);

    T err = ((value > expected) ? value - expected : expected - value) / div;

    if (computedError) 
    {
        *computedError = err;
    }
    
    return (err <= eps);
}

// C++20 introduces new strongly typed, UTF-8 based, char8_t and u8string types
// which are not implicitly convertible to char and std::string respectively.