+ struct FunctionResolver: Visitor
+ {
+ std::map<std::string, std::vector<ProgramSyntax::FunctionDeclaration *> > functions;
+
+ virtual void visit(ProgramSyntax::FunctionCall &);
+ virtual void visit(ProgramSyntax::FunctionDeclaration &);
+ };
+
+ struct BlockModifier: Visitor
+ {
+ bool remove_node;
+ std::list<RefPtr<ProgramSyntax::Node> > insert_nodes;
+
+ BlockModifier();
+
+ void flatten_block(ProgramSyntax::Block &);
+ void apply_and_increment(ProgramSyntax::Block &, std::list<RefPtr<ProgramSyntax::Node> >::iterator &);
+ virtual void visit(ProgramSyntax::Block &);
+ };
+
+ struct InterfaceGenerator: BlockModifier
+ {
+ std::string in_prefix;
+ std::string out_prefix;
+ unsigned scope_level;
+ std::map<std::string, RefPtr<ProgramSyntax::VariableDeclaration> > iface_declarations;
+
+ 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 DeclarationReorderer: Visitor
+ {
+ enum DeclarationKind
+ {
+ NO_DECLARATION,
+ LAYOUT,
+ STRUCT,
+ VARIABLE,
+ FUNCTION
+ };
+
+ DeclarationKind kind;
+
+ DeclarationReorderer();
+
+ virtual void visit(ProgramSyntax::Block &);
+ virtual void visit(ProgramSyntax::InterfaceLayout &) { kind = LAYOUT; }
+ virtual void visit(ProgramSyntax::StructDeclaration &) { kind = STRUCT; }
+ virtual void visit(ProgramSyntax::VariableDeclaration &) { kind = VARIABLE; }
+ virtual void visit(ProgramSyntax::InterfaceBlock &) { kind = VARIABLE; }
+ virtual void visit(ProgramSyntax::FunctionDeclaration &) { kind = FUNCTION; }
+ };
+
+ struct ExpressionEvaluator: ProgramSyntax::NodeVisitor