Port from qAsConst() to std::as_const()

We've been requiring C++17 since Qt 6.0, and our qAsConst use finally
starts to bother us (QTBUG-99313), so time to port away from it
now.

Since qAsConst has exactly the same semantics as std::as_const (down
to rvalue treatment, constexpr'ness and noexcept'ness), there's really
nothing more to it than a global search-and-replace, with manual
unstaging of the actual definition and documentation in dist/,
src/corelib/doc/ and src/corelib/global/.

Task-number: QTBUG-99313
Change-Id: I4c7114444a325ad4e62d0fcbfd347d2bbfb21541
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>

3 files changed, 4 insertions, 4 deletions

diff --git a/src/widgets/itemviews/qheaderview.cpp b/src/widgets/itemviews/qheaderview.cpp
index d70d566d9c..90c3b282ee 100644
--- a/src/widgets/itemviews/qheaderview.cpp
+++ b/src/widgets/itemviews/qheaderview.cpp
@@ -4159,7 +4159,7 @@ bool QHeaderViewPrivate::read(QDataStream &in)
     }
 
     int sectionItemsLengthTotal = 0;
-    for (const SectionItem &section : qAsConst(newSectionItems))
+    for (const SectionItem &section : std::as_const(newSectionItems))
         sectionItemsLengthTotal += section.size;
     if (sectionItemsLengthTotal != lengthIn)
         return false;
diff --git a/src/widgets/itemviews/qlistview.cpp b/src/widgets/itemviews/qlistview.cpp
index 85746d994c..359f6da0bd 100644
--- a/src/widgets/itemviews/qlistview.cpp
+++ b/src/widgets/itemviews/qlistview.cpp
@@ -2329,7 +2329,7 @@ int QListModeViewBase::verticalScrollToValue(int index, QListView::ScrollHint hi
         } else {
             int scrollBarValue = verticalScrollBar()->value();
             int numHidden = 0;
-            for (const auto &idx : qAsConst(dd->hiddenRows))
+            for (const auto &idx : std::as_const(dd->hiddenRows))
                 if (idx.row() <= scrollBarValue)
                     ++numHidden;
             value = qBound(0, scrollValueMap.at(verticalScrollBar()->value()) - numHidden, flowPositions.size() - 1);
@@ -3445,7 +3445,7 @@ int QListView::visualIndex(const QModelIndex &index) const
     d->executePostedLayout();
     QListViewItem itm = d->indexToListViewItem(index);
     int visualIndex = d->commonListView->itemIndex(itm);
-    for (const auto &idx : qAsConst(d->hiddenRows)) {
+    for (const auto &idx : std::as_const(d->hiddenRows)) {
         if (idx.row() <= index.row())
             --visualIndex;
     }
diff --git a/src/widgets/itemviews/qtableview.cpp b/src/widgets/itemviews/qtableview.cpp
index 2f46842712..3cd93f9337 100644
--- a/src/widgets/itemviews/qtableview.cpp
+++ b/src/widgets/itemviews/qtableview.cpp
@@ -907,7 +907,7 @@ void QTableViewPrivate::drawAndClipSpans(const QRegion &area, QPainter *painter,
         }
     }
 
-    for (QSpanCollection::Span *span : qAsConst(visibleSpans)) {
+    for (QSpanCollection::Span *span : std::as_const(visibleSpans)) {
         int row = span->top();
         int col = span->left();
         QModelIndex index = model->index(row, col, root);