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/src/printsupport/widgets/qprintpreviewwidget.cpp b/src/printsupport/widgets/qprintpreviewwidget.cpp
index 247fbf9601..fa33cf66b8 100644
--- a/src/printsupport/widgets/qprintpreviewwidget.cpp
+++ b/src/printsupport/widgets/qprintpreviewwidget.cpp
@@ -296,7 +296,7 @@ void QPrintPreviewWidgetPrivate::init()
 void QPrintPreviewWidgetPrivate::populateScene()
 {
     // remove old pages
-    for (auto *page : qAsConst(pages))
+    for (auto *page : std::as_const(pages))
         scene->removeItem(page);
     qDeleteAll(pages);
     pages.clear();
@@ -305,7 +305,7 @@ void QPrintPreviewWidgetPrivate::populateScene()
     QRect pageRect = printer->pageLayout().paintRectPixels(printer->resolution());
 
     int page = 1;
-    for (auto *picture : qAsConst(pictures)) {
+    for (auto *picture : std::as_const(pictures)) {
         PageItem* item = new PageItem(page++, picture, paperSize, pageRect);
         scene->addItem(item);
         pages.append(item);