QSize: plaster API with Q_DECL_NOTHROW

This is mostly straight-forward, but some things are worth noting:

1. Yes, this is necessary. The noexcept operator looks for noexcept tagging,
   not at the contents of the function to determine whether to return true.
   The more conditionally-noexcept functions are used, the more important it
   becomes that low-level classes are correctly marked noexcept. In that, it
   is like constexpr.
2. In accordance with the rules governing noexcept specifications for the
   standard library itself, the operator/-family of functions are not marked
   as noexcept, since they have preconditions and thus a narrow contract.
   Narrow-contract functions should not be noexcept. All other functions
   have wide contracts (ie. no preconditions).

Change-Id: I9fc94218a2728c272483f9c2826c265f5b11c9b4
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/corelib/tools/qsize.cpp b/src/corelib/tools/qsize.cpp
index 4c124162a1..12673ccd0c 100644
--- a/src/corelib/tools/qsize.cpp
+++ b/src/corelib/tools/qsize.cpp
@@ -156,7 +156,7 @@ QT_BEGIN_NAMESPACE
     \sa setWidth(), setHeight(), transposed()
 */
 
-void QSize::transpose()
+void QSize::transpose() Q_DECL_NOTHROW
 {
     int tmp = wd;
     wd = ht;
@@ -217,7 +217,7 @@ void QSize::transpose()
     Return a size scaled to a rectangle with the given size \a s,
     according to the specified \a mode.
 */
-QSize QSize::scaled(const QSize &s, Qt::AspectRatioMode mode) const
+QSize QSize::scaled(const QSize &s, Qt::AspectRatioMode mode) const Q_DECL_NOTHROW
 {
     if (mode == Qt::IgnoreAspectRatio || wd == 0 || ht == 0) {
         return s;
@@ -590,7 +590,7 @@ QDebug operator<<(QDebug dbg, const QSize &s)
     \sa setWidth(), setHeight(), transposed()
 */
 
-void QSizeF::transpose()
+void QSizeF::transpose() Q_DECL_NOTHROW
 {
     qreal tmp = wd;
     wd = ht;
@@ -651,7 +651,7 @@ void QSizeF::transpose()
     Returns a size scaled to a rectangle with the given size \a s,
     according to the specified \a mode.
 */
-QSizeF QSizeF::scaled(const QSizeF &s, Qt::AspectRatioMode mode) const
+QSizeF QSizeF::scaled(const QSizeF &s, Qt::AspectRatioMode mode) const Q_DECL_NOTHROW
 {
     if (mode == Qt::IgnoreAspectRatio || qIsNull(wd) || qIsNull(ht)) {
         return s;