T *multi_visit(T &);
virtual void visit(Literal &);
virtual void visit(VariableReference &);
+ virtual void visit(UnaryExpression &);
+ virtual void visit(BinaryExpression &);
+ virtual void visit(TernaryExpression &);
virtual void visit(BasicTypeDeclaration &);
virtual void visit(ImageTypeDeclaration &);
virtual void visit(StructDeclaration &);