+ template<typename T>
+ struct NodeGatherer: Visitor
+ {
+ typedef std::list<T *> ResultType;
+
+ std::list<T *> nodes;
+
+ const ResultType &get_result() const { return nodes; }
+ virtual void visit(T &n) { nodes.push_back(&n); }
+ };
+
+ struct DeclarationCombiner: Visitor
+ {
+ bool toplevel;
+ std::map<std::string, std::vector<ProgramSyntax::FunctionDeclaration *> > functions;
+ std::map<std::string, ProgramSyntax::VariableDeclaration *> variables;
+ bool remove_node;
+
+ DeclarationCombiner();
+
+ virtual void visit(ProgramSyntax::Block &);
+ virtual void visit(ProgramSyntax::FunctionDeclaration &);
+ virtual void visit(ProgramSyntax::VariableDeclaration &);
+ };
+
+ struct VariableResolver: Visitor
+ {
+ std::vector<ProgramSyntax::Block *> blocks;
+ ProgramSyntax::StructDeclaration *type;
+ bool anonymous;
+ std::string block_interface;
+ bool record_target;
+ ProgramSyntax::VariableDeclaration *assignment_target;
+ bool self_referencing;
+
+ VariableResolver();
+
+ virtual void apply(ProgramSyntax::Stage &);
+ virtual void visit(ProgramSyntax::Block &);
+ virtual void visit(ProgramSyntax::VariableReference &);
+ virtual void visit(ProgramSyntax::MemberAccess &);
+ virtual void visit(ProgramSyntax::BinaryExpression &);
+ virtual void visit(ProgramSyntax::Assignment &);
+ virtual void visit(ProgramSyntax::StructDeclaration &);
+ virtual void visit(ProgramSyntax::VariableDeclaration &);
+ virtual void visit(ProgramSyntax::InterfaceBlock &);
+ };
+
+ struct InterfaceGenerator: Visitor
+ {
+ std::string in_prefix;
+ std::string out_prefix;
+ unsigned scope_level;
+ std::map<std::string, ProgramSyntax::VariableDeclaration *> iface_declarations;
+ bool remove_node;
+ std::list<ProgramSyntax::Node *> insert_nodes;
+
+ 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; }
+ virtual void visit(ProgramSyntax::VariableReference &);
+ virtual void visit(ProgramSyntax::MemberAccess &);
+ virtual void visit(ProgramSyntax::BinaryExpression &);
+ virtual void visit(ProgramSyntax::Assignment &);
+ void record_assignment(ProgramSyntax::VariableDeclaration &, ProgramSyntax::Node &, bool);
+ virtual void visit(ProgramSyntax::ExpressionStatement &);
+ virtual void visit(ProgramSyntax::StructDeclaration &);
+ virtual void visit(ProgramSyntax::VariableDeclaration &);
+ virtual void visit(ProgramSyntax::InterfaceBlock &);
+ virtual void visit(ProgramSyntax::FunctionDeclaration &);
+ void merge_down_assignments();
+ virtual void visit(ProgramSyntax::Conditional &);
+ virtual void visit(ProgramSyntax::Iteration &);
+ };
+
+ struct NodeRemover: Visitor
+ {
+ std::set<ProgramSyntax::Node *> to_remove;
+
+ NodeRemover() { }
+ NodeRemover(const std::set<ProgramSyntax::Node *> &);
+
+ virtual void visit(ProgramSyntax::Block &);
+ virtual void visit(ProgramSyntax::VariableDeclaration &);
+ };
+
+ Resources *resources;