+ InterfaceGenerator();
+
+ static std::string get_out_prefix(ProgramSyntax::StageType);
+ virtual void apply(ProgramSyntax::Stage &);
+ virtual void visit(ProgramSyntax::Block &);
+ std::string change_prefix(const std::string &, const std::string &) const;
+ bool generate_interface(ProgramSyntax::VariableDeclaration &, const std::string &, const std::string &);
+ void insert_assignment(const std::string &, ProgramSyntax::Expression *);
+ virtual void visit(ProgramSyntax::VariableReference &);
+ virtual void visit(ProgramSyntax::VariableDeclaration &);
+ virtual void visit(ProgramSyntax::Passthrough &);
+ };
+
+ struct VariableRenamer: Visitor
+ {
+ virtual void visit(ProgramSyntax::VariableReference &);
+ virtual void visit(ProgramSyntax::VariableDeclaration &);
+ };
+
+ struct UnusedVariableLocator: Visitor
+ {
+ struct AssignmentList
+ {
+ std::vector<ProgramSyntax::Node *> nodes;
+ bool conditional;
+ bool self_referencing;
+ };
+
+ typedef std::set<ProgramSyntax::Node *> ResultType;
+ typedef std::map<ProgramSyntax::VariableDeclaration *, AssignmentList> BlockAssignmentMap;
+
+ std::set<ProgramSyntax::Node *> unused_nodes;
+ std::map<ProgramSyntax::VariableDeclaration *, ProgramSyntax::Node *> aggregates;
+ ProgramSyntax::Node *aggregate;
+ std::vector<BlockAssignmentMap> assignments;
+ ProgramSyntax::Assignment *assignment;
+ bool assignment_target;
+
+ UnusedVariableLocator();
+
+ virtual void apply(ProgramSyntax::Stage &);
+ const ResultType &get_result() const { return unused_nodes; }