Fix unrestricted unions testcase and add runtime example

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/branches/gsoc2009-matevz@13849 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Doc/Manual/Cpp0x.html

@@ -439,19 +439,24 @@ typedef void (*PFD)(double);  // The old style
 
 <p>SWIG fully supports any type inside a union even if it does not
 define a trivial constructor. For example, the wrapper for the following
-code is correctly produced:</p>
+code correctly provides access to all members in the union:</p>
 
 <div class="code"><pre>
 struct point {
   point() {}
-  point(int x, int y): x_(x), y_(y) {}
+  point(int x, int y) : x_(x), y_(y) {}
   int x_, y_;
 };
 
+#include <new> // For placement 'new' in the constructor below
 union P {
   int z;
   double w;
-  point p;  // Illegal in C++; point has a non-trivial constructor.  However, this is legal in C++0x.
+  point p; // Illegal in C++03; legal in C++11.
+  // Due to the point member, a constructor definition is required.
+  P() {
+    new(&amp;p) point();
+  }
 } p1;
 </pre></div>
 

Examples/test-suite/common.mk

@@ -448,6 +448,7 @@ CPP0X_TEST_CASES = \
 	cpp0x_template_double_brackets \
 	cpp0x_template_explicit \
         cpp0x_uniform_initialization \
+	cpp0x_unrestricted_unions \
 	cpp0x_userdefined_literals \
 	cpp0x_variadic_templates
 
@@ -456,7 +457,6 @@ CPP0X_TEST_CASES = \
 #	cpp0x_lambda_functions \      # not supported by GCC or MSVC yet
 #	cpp0x_template_typedefs \     # not supported by any compiler yet (now in gcc-4.7)
 #	cpp0x_thread_local \          # not supported by any compiler yet
-#	cpp0x_unrestricted_unions \   # not supported by any compiler yet (now in gcc-4.6 but generates internal compiler error)
 
 # Broken C++0x test cases.
 CPP0X_TEST_BROKEN = 

Examples/test-suite/cpp0x_unrestricted_unions.i

@@ -9,10 +9,15 @@ struct point {
   int x_, y_;
 };
 
+#include <new> // For placement 'new' in the constructor below
 union P {
   int z;
   double w;
-  point p;
+  point p; // Illegal in C++03; legal in C++11.
+  // Due to the point member, a constructor definition is required.
+  P() {
+    new(&p) point();
+  }
 } p1;
 %}