group: or original flags with additional flags

app/node/group/group.cpp

@@ -58,7 +58,7 @@ void NodeGroup::Retranslate()
   }
 }
 
-QString NodeGroup::AddInputPassthrough(const NodeInput &input)
+QString NodeGroup::AddInputPassthrough(const NodeInput &input, const InputFlags &flags)
 {
   Q_ASSERT(ContextContainsNode(input.node()));
 
@@ -72,7 +72,7 @@ QString NodeGroup::AddInputPassthrough(const NodeInput &input)
   // Add input
   QString id = GetGroupInputIDFromInput(input);
 
-  AddInput(id, input.GetDataType(), input.GetDefaultValue(), input.GetFlags());
+  AddInput(id, input.GetDataType(), input.GetDefaultValue(), input.GetFlags() | flags);
 
   input_passthroughs_.insert(id, input);
 

app/node/group/group.h

@@ -41,7 +41,7 @@ public:
 
   virtual void Retranslate() override;
 
-  QString AddInputPassthrough(const NodeInput &input);
+  QString AddInputPassthrough(const NodeInput &input, const InputFlags &flags = InputFlags());
 
   void RemoveInputPassthrough(const NodeInput &input);
 

app/node/param.h

@@ -57,6 +57,19 @@ public:
     return f_ & f;
   }
 
+  InputFlags operator|(const InputFlags &f) const
+  {
+    InputFlags i = *this;
+    i |= f;
+    return i;
+  }
+
+  InputFlags &operator|=(const InputFlags &f)
+  {
+    f_ |= f.f_;
+    return *this;
+  }
+
 private:
   uint64_t f_;