+ struct FunctionResolver: Visitor
+ {
+ std::map<std::string, std::vector<ProgramSyntax::FunctionDeclaration *> > functions;
+
+ using Visitor::visit;
+ virtual void visit(ProgramSyntax::FunctionCall &);
+ virtual void visit(ProgramSyntax::FunctionDeclaration &);
+ };
+
+ 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 &);
+ using Visitor::visit;
+ 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
+ {
+ using Visitor::visit;
+ virtual void visit(ProgramSyntax::VariableReference &);
+ virtual void visit(ProgramSyntax::VariableDeclaration &);
+ };
+
+ struct DeclarationReorderer: Visitor
+ {
+ enum DeclarationKind
+ {
+ NO_DECLARATION,
+ LAYOUT,
+ STRUCT,
+ VARIABLE,
+ FUNCTION
+ };
+
+ DeclarationKind kind;
+
+ DeclarationReorderer();
+
+ using Visitor::visit;
+ 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 InlineableFunctionLocator: Visitor
+ {
+ typedef std::set<ProgramSyntax::FunctionDeclaration *> ResultType;
+
+ std::map<ProgramSyntax::FunctionDeclaration *, unsigned> refcounts;
+ std::set<ProgramSyntax::FunctionDeclaration *> inlineable;
+ ProgramSyntax::FunctionDeclaration *in_function;
+
+ InlineableFunctionLocator();
+
+ const ResultType &get_result() const { return inlineable; }
+ using Visitor::visit;
+ virtual void visit(ProgramSyntax::FunctionCall &);
+ virtual void visit(ProgramSyntax::FunctionDeclaration &);
+ };
+
+ struct FunctionInliner: Visitor
+ {
+ std::set<ProgramSyntax::FunctionDeclaration *> inlineable;
+ unsigned extract_result;
+ RefPtr<ProgramSyntax::Expression> inline_result;
+
+ FunctionInliner();
+ FunctionInliner(const std::set<ProgramSyntax::FunctionDeclaration *> &);
+
+ void visit_and_inline(RefPtr<ProgramSyntax::Expression> &);
+ using Visitor::visit;
+ virtual void visit(ProgramSyntax::Block &);
+ virtual void visit(ProgramSyntax::UnaryExpression &);
+ virtual void visit(ProgramSyntax::BinaryExpression &);
+ virtual void visit(ProgramSyntax::FunctionCall &);
+ virtual void visit(ProgramSyntax::Return &);
+ };
+
+ struct ExpressionEvaluator: ProgramSyntax::NodeVisitor