QAbstractFileEngineIterator: add `bool advance()` virtual method

And remove hasNext/next() methods. This remodels QAFEI to be like
QFileSystemIterator. This better fits the logic in the newly added
QDirListing class (which uses STL-style iterators).

QFSFileEngineIterator:
Initialize the internal nativeIterator in the constructor; also replace
the advance() private method with an override for the advance() method
inherited from the base class.

QResourceFileEngineIterator:
Override currentFileInfo(), with a QResouces the QFileInfo is created
on demand if/when this method is called.

This is the backend/private API, and QDirListing is the public API that
can be used in a ranged-for to iterate over directory entries.

Change-Id: I93eb7bdd64823ac01eea2dcaaa6bcc8ad868b2c4
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/src/corelib/io/qabstractfileengine_p.h b/src/corelib/io/qabstractfileengine_p.h
index 8d6a1b8a35..e2524a2d41 100644
--- a/src/corelib/io/qabstractfileengine_p.h
+++ b/src/corelib/io/qabstractfileengine_p.h
@@ -202,8 +202,7 @@ public:
                                 const QStringList &nameFilters);
     virtual ~QAbstractFileEngineIterator();
 
-    virtual QString next() = 0;
-    virtual bool hasNext() const = 0;
+    virtual bool advance() = 0;
 
     QString path() const;
     QStringList nameFilters() const;