Method operator()

internal/number.h:99–101

  constexpr explicit DoubleCompareVisitor(double v) : v(v) {}

  constexpr ComparisonResult operator()(double other) const {
    return DoubleCompare(v, other);
  }

  constexpr ComparisonResult operator()(uint64_t other) const {
    if (v > kDoubleToUintMax) {