QPoint/QPointF: inline manhattanLength(); QLineF: inline isNull()

There's no reason for them not to be, and it's a prerequisite
for making these functions constexpr.

Change-Id: I03c9965147b51014c7af60a4c2d7f25a3f6e21a7
Reviewed-by: David Faure <faure@kde.org>
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>

src/corelib/tools/qline.cpp

@@ -412,16 +412,12 @@ QDataStream &operator>>(QDataStream &stream, QLine &line)
 */
 
 /*!
+    \fn bool QLineF::isNull() const
+
     Returns true if the line is not set up with valid start and end point;
     otherwise returns false.
 */
 
-bool QLineF::isNull() const
-{
-    return (qFuzzyCompare(pt1.x(), pt2.x()) && qFuzzyCompare(pt1.y(), pt2.y())) ? true : false;
-}
-
-
 /*!
     \fn QPointF QLineF::p1() const
 

src/corelib/tools/qline.h

@@ -310,6 +310,11 @@ inline qreal QLineF::y2() const
     return pt2.y();
 }
 
+inline bool QLineF::isNull() const
+{
+    return qFuzzyCompare(pt1.x(), pt2.x()) && qFuzzyCompare(pt1.y(), pt2.y());
+}
+
 inline QPointF QLineF::p1() const
 {
     return pt1;

src/corelib/tools/qpoint.cpp

@@ -402,6 +402,8 @@ QDataStream &operator>>(QDataStream &s, QPoint &p)
 
 #endif // QT_NO_DATASTREAM
 /*!
+    \fn int QPoint::manhattanLength() const
+
     Returns the sum of the absolute values of x() and y(),
     traditionally known as the "Manhattan length" of the vector from
     the origin to the point. For example:
@@ -417,10 +419,6 @@ QDataStream &operator>>(QDataStream &s, QPoint &p)
     apply to travelers who can only travel on a rectangular grid, like
     the streets of Manhattan.
 */
-int QPoint::manhattanLength() const
-{
-    return qAbs(x())+qAbs(y());
-}
 
 #ifndef QT_NO_DEBUG_STREAM
 QDebug operator<<(QDebug dbg, const QPoint &p) {
@@ -505,6 +503,7 @@ QDebug operator<<(QDebug d, const QPointF &p)
 
 
 /*!
+    \fn qreal QPointF::manhattanLength() const
     \since 4.6
 
     Returns the sum of the absolute values of x() and y(),
@@ -513,10 +512,6 @@ QDebug operator<<(QDebug d, const QPointF &p)
 
     \sa QPoint::manhattanLength()
 */
-qreal QPointF::manhattanLength() const
-{
-    return qAbs(x())+qAbs(y());
-}
 
 /*!
     \fn qreal QPointF::x() const

src/corelib/tools/qpoint.h

@@ -130,6 +130,9 @@ inline void QPoint::setX(int xpos)
 inline void QPoint::setY(int ypos)
 { yp = ypos; }
 
+inline int QPoint::manhattanLength() const
+{ return qAbs(x())+qAbs(y()); }
+
 inline int &QPoint::rx()
 { return xp; }
 
@@ -267,6 +270,11 @@ inline QPointF::QPointF(qreal xpos, qreal ypos) : xp(xpos), yp(ypos) { }
 
 inline QPointF::QPointF(const QPoint &p) : xp(p.x()), yp(p.y()) { }
 
+inline qreal QPointF::manhattanLength() const
+{
+    return qAbs(x())+qAbs(y());
+}
+
 inline bool QPointF::isNull() const
 {
     return qIsNull(xp) && qIsNull(yp);