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>

1 files changed, 2 insertions, 2 deletions

diff --git a/examples/widgets/itemviews/editabletreemodel/treeitem.cpp b/examples/widgets/itemviews/editabletreemodel/treeitem.cpp
index 5784202b93..942ba277a3 100644
--- a/examples/widgets/itemviews/editabletreemodel/treeitem.cpp
+++ b/examples/widgets/itemviews/editabletreemodel/treeitem.cpp
@@ -88,7 +88,7 @@ bool TreeItem::insertColumns(int position, int columns)
     for (int column = 0; column < columns; ++column)
         itemData.insert(position, QVariant());
 
-    for (TreeItem *child : qAsConst(childItems))
+    for (TreeItem *child : std::as_const(childItems))
         child->insertColumns(position, columns);
 
     return true;
@@ -123,7 +123,7 @@ bool TreeItem::removeColumns(int position, int columns)
     for (int column = 0; column < columns; ++column)
         itemData.remove(position);
 
-    for (TreeItem *child : qAsConst(childItems))
+    for (TreeItem *child : std::as_const(childItems))
         child->removeColumns(position, columns);
 
     return true;