A little more work on the Ruby support for C++ polymorphism. Exception

handling almost works...


git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@4745 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/test-suite/director_exception.i

@@ -31,6 +31,7 @@ class SWIG_DIRECTOR_METHOD_EXCEPTION: public SWIG_DIRECTOR_EXCEPTION {};
 %include "exception.i"
 %include "std_string.i"
 
+#ifdef SWIGPYTHON
 
 %feature("director:except") {
 	if ($error != NULL) {
@@ -43,6 +44,20 @@ class SWIG_DIRECTOR_METHOD_EXCEPTION: public SWIG_DIRECTOR_EXCEPTION {};
 	catch (SWIG_DIRECTOR_EXCEPTION &e) { SWIG_fail; }
 }
 
+#endif
+
+#ifdef SWIGRUBY
+
+%feature("director:except") {
+    throw SWIG_DIRECTOR_METHOD_EXCEPTION();
+}
+
+%exception {
+  try { $action }
+  catch (SWIG_DIRECTOR_EXCEPTION &e) { rb_raise(e.getType(), e.getMessage()); }
+}
+
+#endif
 
 %feature("director") Foo;
 

SWIG/Examples/test-suite/ruby/director_exception_runme.rb

@@ -0,0 +1,42 @@
+require 'director_exception'
+
+include Director_exception
+
+class MyFoo < Foo
+  def ping
+    raise NotImplementedError, "MyFoo::ping() EXCEPTION"
+  end
+end
+
+class MyFoo2 < Foo
+  def ping
+    nil # error: should return a string
+  end
+end
+
+ok = false
+
+a = MyFoo.new
+b = launder(a)
+
+begin
+  b.pong
+rescue NotImplementedError
+  ok = true
+end
+
+raise RuntimeError unless ok
+
+ok = false
+
+a = MyFoo2.new
+b = launder(a)
+
+begin
+  b.pong
+rescue TypeError
+  ok = true
+end
+
+raise RuntimeError unless ok
+