Added some REFLECT_ macros, so the reflection code doesn't have to mess with the internals of reflection.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@218 0fc631ac-6414-0410-93d0-97cfa31319b6

src/util/io/package_manager.cpp

@@ -27,7 +27,7 @@ String IncludePackage::typeName() const { return _("include"); }
 
 IMPLEMENT_REFLECTION(IncludePackage) {
 	REFLECT_BASE(Packaged);
-	if (tag.reading()) {
+	REFLECT_IF_READING {
 		// ingore
 		String version;
 		REFLECT(version);

src/util/reflect.hpp

@@ -101,6 +101,34 @@
 /// Declare that the variables of a base class should also be reflected
 #define REFLECT_BASE(Base)    Base::reflect_impl(tag)
 
+/// Reflect a group of declarations only when reading
+/** Usage:
+ *  @code
+ *   REFLECT_IF_READING {
+ *      // only executed by Reader
+ *   }
+ *  @endcode
+ */
+#define REFLECT_IF_READING    if (tag.reading())
+
+/// Reflect a group of declarations only when *not* reading
+/** Usage:
+ *  @code
+ *   REFLECT_IF_NOT_READING {
+ *      // only executed by Writer, GetMember, GetDefaultMember
+ *   }
+ *  @endcode
+ */
+#define REFLECT_IF_NOT_READING  if (!tag.reading())
+
+/// Add an alias for backwards compatability
+/** If a key 'old' is encountered in the input file, it is interpreted as 'new' for versions < version
+ *  Example:
+ *  @code
+ *   REFLECT_ALIAS(300, "style", "stylesheet") // prior to 0.3.0 style was used instead of stylesheet
+ *  @encode
+ */
+#define REFLECT_ALIAS(version, old, new) tag.addAlias(version, _(old), _(new))
 
 // ----------------------------------------------------------------------------- : Reflecting enums