add copyctor

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@8130 626c5289-ae23-0410-ae9c-e8d60b6d4f22

CHANGES.current

@@ -1,6 +1,58 @@
 Version 1.3.28 (unreleased).
 ===========================
 
+
+12/29/2005: mmatus
+	  - Add the copyctor feature/directive to enable the automatic
+	    generation of copy constructors. Use as in:
+
+	      %copyctor A;
+
+	      struct A {
+
+              };
+
+	    then this will work
+
+	      a1 = A();
+	      a2 = A(a1);
+
+	    Also, since is a feature, if you type just
+
+	      %copyctor;
+
+	    that will  enable the automatic generation for all the
+	    classes. That is also equivalent to
+
+	       swig -features copyctor -c++ ...
+
+	    Notes: 
+
+	    1.- The feature only works in C++ mode.
+
+	    2.- The automatic creation of the copy constructor will
+	        usually produce overloading. Hence, if the target
+	        language doesn't support overloading, a special name
+	        will be used (A_copy).
+	    
+	    3.- For the same above, probably is not a good idea to
+	        use the flag when, for example, in python if you are
+		using keywords.
+
+            4.- The copyctor automatic mechanism follows more or less
+	        the same rules than the default constructor mechanism,
+	        i.e., a copy constructor will not be added if the
+	        class is abstract or if there is a pertinent non-public 
+		copy ctor in the class or its hierarchy.
+
+		Hence, it could be necessary for you to complete the
+		class declaration with the proper non-public copy ctor
+		to avoid a wrong constructor addition.
+		
+          - Fix features/rename for templates ctor/dtor and other
+            things around while adding the copyctor mechanism.
+	    
+
 12/27/2005: mmatus
 	  - Add the 'math' option to typemaps. Assume you have: