bool equals(const CSSCalcExpressionNode& exp) const override
    {
        if (type() != exp.type())
            return false;

        const CSSCalcBinaryOperation& other = static_cast<const CSSCalcBinaryOperation&>(exp);
        return compareCSSValuePtr(m_leftSide, other.m_leftSide)
            && compareCSSValuePtr(m_rightSide, other.m_rightSide)
            && m_operator == other.m_operator;
    }

bool CSSBasicShapeCircle::equals(const CSSBasicShape& shape) const
{
    if (shape.type() != CSSBasicShapeCircleType)
        return false;

    const CSSBasicShapeCircle& other = toCSSBasicShapeCircle(shape);
    return compareCSSValuePtr(m_centerX, other.m_centerX)
        && compareCSSValuePtr(m_centerY, other.m_centerY)
        && compareCSSValuePtr(m_radius, other.m_radius)
        && compareCSSValuePtr(m_referenceBox, other.m_referenceBox);
}

bool CSSBasicShapeCircle::equals(const CSSBasicShape& shape) const
{
    if (!is<CSSBasicShapeCircle>(shape))
        return false;

    const CSSBasicShapeCircle& other = downcast<CSSBasicShapeCircle>(shape);
    return compareCSSValuePtr(m_centerX, other.m_centerX)
        && compareCSSValuePtr(m_centerY, other.m_centerY)
        && compareCSSValuePtr(m_radius, other.m_radius)
        && compareCSSValuePtr(m_referenceBox, other.m_referenceBox);
}

bool CSSBasicShapeEllipse::equals(const CSSBasicShape& shape) const
{
    if (shape.type() != CSSBasicShapeEllipseType)
        return false;

    const CSSBasicShapeEllipse& other = static_cast<const CSSBasicShapeEllipse&>(shape);
    return compareCSSValuePtr(m_centerX, other.m_centerX)
        && compareCSSValuePtr(m_centerY, other.m_centerY)
        && compareCSSValuePtr(m_radiusX, other.m_radiusX)
        && compareCSSValuePtr(m_radiusY, other.m_radiusY)
        && compareCSSValuePtr(m_referenceBox, other.m_referenceBox);
}

bool CSSFontValue::equals(const CSSFontValue& other) const
{
    return compareCSSValuePtr(style, other.style)
        && compareCSSValuePtr(variant, other.variant)
        && compareCSSValuePtr(weight, other.weight)
        && compareCSSValuePtr(stretch, other.stretch)
        && compareCSSValuePtr(size, other.size)
        && compareCSSValuePtr(lineHeight, other.lineHeight)
        && compareCSSValuePtr(family, other.family);
}

bool CSSShadowValue::equals(const CSSShadowValue& other) const
{
    return compareCSSValuePtr(color, other.color)
        && compareCSSValuePtr(x, other.x)
        && compareCSSValuePtr(y, other.y)
        && compareCSSValuePtr(blur, other.blur)
        && compareCSSValuePtr(spread, other.spread)
        && compareCSSValuePtr(style, other.style);
}

bool CSSFunctionValue::equals(const CSSFunctionValue& other) const
{
    return m_name == other.m_name && compareCSSValuePtr(m_args, other.m_args);
}

bool CSSReflectValue::equals(const CSSReflectValue& other) const
{
    return m_direction == other.m_direction
        && compareCSSValuePtr(m_offset, other.m_offset)
        && compareCSSValuePtr(m_mask, other.m_mask);
}

bool CSSCursorImageValue::equals(const CSSCursorImageValue& other) const
{
    return m_hasHotSpot ? other.m_hasHotSpot && m_hotSpot == other.m_hotSpot : !other.m_hasHotSpot
        && compareCSSValuePtr(m_imageValue, other.m_imageValue);
}

bool CSSCalcValue::equals(const CSSCalcValue& other) const
{
    return compareCSSValuePtr(m_expression, other.m_expression);
}

bool CSSBorderImageSliceValue::equals(const CSSBorderImageSliceValue& other) const
{
    return m_fill == other.m_fill && compareCSSValuePtr(m_slices, other.m_slices);
}

bool CSSFilterImageValue::equals(const CSSFilterImageValue& other) const
{
    return compareCSSValuePtr(m_imageValue, other.m_imageValue)
        && compareCSSValuePtr(m_filterValue, other.m_filterValue);
}

bool CSSCrossfadeValue::equals(const CSSCrossfadeValue& other) const
{
    return equalInputImages(other)
        && compareCSSValuePtr(m_percentageValue, other.m_percentageValue);
}

bool CSSCrossfadeValue::equalInputImages(const CSSCrossfadeValue& other) const
{
    return compareCSSValuePtr(m_fromValue, other.m_fromValue)
        && compareCSSValuePtr(m_toValue, other.m_toValue);
}