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, 12 insertions, 0 deletions

diff --git a/tests/GenerateSipBindings/external_lib.h b/tests/GenerateSipBindings/external_lib.h
new file mode 100644
index 00000000..f5ea38b2
--- /dev/null
+++ b/tests/GenerateSipBindings/external_lib.h
@@ -0,0 +1,12 @@
+
+#pragma once
+
+class ExternalFwdDecl
+{
+public:
+  ExternalFwdDecl(int value);
+
+  int getValue() const;
+private:
+  int m_value;
+};