QmlJS: Add ComponentVersion class to simplify dealing with versions.

src/libs/qmljs/qmljscomponentversion.h

@@ -0,0 +1,35 @@
+#ifndef QMLJSCOMPONENTVERSION_H
+#define QMLJSCOMPONENTVERSION_H
+
+#include "qmljs_global.h"
+
+namespace QmlJS {
+
+class QMLJS_EXPORT ComponentVersion
+{
+    int _major;
+    int _minor;
+
+public:
+    static const int NoVersion;
+
+    ComponentVersion();
+    ComponentVersion(int major, int minor);
+    ~ComponentVersion();
+
+    int major() const
+    { return _major; }
+    int minor() const
+    { return _minor; }
+
+    bool isValid() const;
+};
+
+bool operator<(const ComponentVersion &lhs, const ComponentVersion &rhs);
+bool operator<=(const ComponentVersion &lhs, const ComponentVersion &rhs);
+bool operator==(const ComponentVersion &lhs, const ComponentVersion &rhs);
+bool operator!=(const ComponentVersion &lhs, const ComponentVersion &rhs);
+
+} // namespace QmlJS
+
+#endif // QMLJSCOMPONENTVERSION_H