Get rid of special ctor/dtor handling in C module

By delegating to the base class instead we not only save quite a few
lines of code, but gain support for ctors/dtors defined using %extend,
which didn't work before, allowing to reenable some of the previously
failing tests.

Examples/test-suite/c/Makefile.in

@@ -33,12 +33,9 @@ FAILING_C_TESTS := \
     function_typedef \
     lextype \
     li_carrays \
-    li_cpointer \
     nested \
     nested_extend_c \
     nested_structs \
-    overload_extend2 \
-    overload_extend_c \
     typedef_struct \
     union_parameter \
     unions \
@@ -54,15 +51,12 @@ FAILING_CPP_TESTS := \
     char_strings \
     constant_pointers \
     default_args \
-    default_constructor \
     director_enum \
     director_smartptr \
     director_string \
     enum_thorough \
     extend \
-    extend_constructor_destructor \
     extend_default \
-    extend_placement \
     extern_c \
     extern_template_method \
     features \
@@ -93,7 +87,6 @@ FAILING_CPP_TESTS := \
     nested_scope \
     nested_template_base \
     smart_pointer_extend \
-    smart_pointer_not \
     smart_pointer_template_defaults_overload \
     stl_no_default_constructor \
     struct_initialization_cpp \

Examples/test-suite/namespace_extend.i

@@ -8,12 +8,30 @@ namespace foo {
    public:
    };
 }
+%}
+
+// C uses different naming convention, with all functions starting with the class prefix.
+#ifdef SWIGC
+%{
+foo::bar *foo_bar_new() {
+   return new foo::bar;
+}
+void     foo_bar_delete(foo::bar *self) {
+   delete self;
+}
+%}
+#else
+%{
 foo::bar *new_foo_bar() {
    return new foo::bar;
 }
 void     delete_foo_bar(foo::bar *self) {
    delete self;
 }
+%}
+#endif
+
+%{
 int foo_bar_blah(foo::bar *self, int x) {
    return x;
 }