eolian_cxx: Add 'unknown' to parameter direction

It'll be used in eolian_mono as the 'direction' of return types in some
helper functions.

2 files changed, 5 insertions, 2 deletions

diff --git a/src/lib/eolian_cxx/grammar/klass_def.hpp b/src/lib/eolian_cxx/grammar/klass_def.hpp
index 83e84abb54..124c99ba42 100644
--- a/src/lib/eolian_cxx/grammar/klass_def.hpp
+++ b/src/lib/eolian_cxx/grammar/klass_def.hpp
@@ -413,7 +413,7 @@ inline void type_def::set(Eolian_Expression_Type eolian_exp_type)
 
 enum class parameter_direction
 {
-  in, inout, out
+  unknown, in, inout, out
 };
 
 namespace detail {
diff --git a/src/lib/eolian_cxx/grammar/parameter.hpp b/src/lib/eolian_cxx/grammar/parameter.hpp
index e06cfeaaf0..c82345b685 100644
--- a/src/lib/eolian_cxx/grammar/parameter.hpp
+++ b/src/lib/eolian_cxx/grammar/parameter.hpp
@@ -23,7 +23,10 @@ struct parameter_type_generator
             break;
           case attributes::parameter_direction::in:
             dir = "in";
-          break;
+            break;
+          case attributes::parameter_direction::unknown:
+            dir = "";
+            break;
         }
 
       attributes::regular_type_def const* typ =