Bindings: Fix handling of forward declarations

It is not appropriate to decorate each forward declaration with the SIP
attribute /External/.  That is only needed for forward declarations of
types which are defined in a different module.

Local forward declarations can be omitted from the sip code.  In sip
code, a forward declaration followed later by a full class definition is
an error.

Omit forward declarations unless they are decorated with the external
attribute.  Introduce a rules database for consumers to decorate them
with the attribute as required.

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/GenerateSipBindings/external_lib.cpp b/tests/GenerateSipBindings/external_lib.cpp
new file mode 100644
index 00000000..a08125ff
--- /dev/null
+++ b/tests/GenerateSipBindings/external_lib.cpp
@@ -0,0 +1,13 @@
+
+#include "external_lib.h"
+
+ExternalFwdDecl::ExternalFwdDecl(int value)
+  : m_value(value)
+{
+
+}
+
+int ExternalFwdDecl::getValue() const
+{
+  return m_value;
+}