Once we're fully C++14 we can get rid of the ugly, multiply-nested ternary operator returns that are used across the base/numerics constexpr functions. Here's an example from base/numerics/checked_math.h:

  constexpr CheckedNumeric operator-() const {
    // The negation of two's complement int min is int min, so we simply
    // check for that in the constexpr case.
    // We use an optimized code path for a known run-time variable.
    return MustTreatAsConstexpr(state_.value()) || !std::is_signed<T>::value ||
                   std::is_floating_point<T>::value
               ? CheckedNumeric<T>(
                     NegateWrapper(state_.value()),
                     IsValid() && (!std::is_signed<T>::value ||
                                   std::is_floating_point<T>::value ||
                                   NegateWrapper(state_.value()) !=
                                       std::numeric_limits<T>::lowest()))
               : FastRuntimeNegate();
  }