refs #545 CAtomicFile::abandon() closes without renaming, and dtor abandons if it is called due to an exception being thrown.

src/blackmisc/atomicfile.cpp

@@ -50,6 +50,11 @@ namespace BlackMisc
         return error() == NoError;
     }
 
+    void CAtomicFile::abandon()
+    {
+        QFile::close();
+    }
+
     CAtomicFile::FileError CAtomicFile::error() const
     {
         if (m_renameError) { return RenameError; }

src/blackmisc/atomicfile.h

@@ -30,7 +30,7 @@ namespace BlackMisc
         CAtomicFile(const QString &filename) : QFile(filename) {}
 
         //! \copydoc QFile::~QFile
-        ~CAtomicFile() { close(); }
+        ~CAtomicFile() { if (! std::uncaught_exception()) { close(); } }
 
         //! \copydoc QFile::open
         //! Just before opening the file, the filename is changed so we actually write to a temporary file.
@@ -43,6 +43,9 @@ namespace BlackMisc
         //! Calls close() and returns false if there was an error at any stage.
         bool checkedClose();
 
+        //! Closes the file without renaming it.
+        void abandon();
+
         //! \copydoc QFileDevice::error
         FileError error() const;