+ template<typename T>
+ struct NodeGatherer: Visitor
+ {
+ typedef std::list<T *> ResultType;
+
+ std::list<T *> nodes;
+
+ const ResultType &get_result() const { return nodes; }
+ using Visitor::visit;
+ 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();
+
+ using Visitor::visit;
+ 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 &);
+ using Visitor::visit;
+ 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 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 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 &);
+ using Visitor::visit;
+ 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 &);
+ 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
+ {
+ typedef std::map<ProgramSyntax::VariableDeclaration *, ProgramSyntax::Expression *> ValueMap;
+
+ const ValueMap *variable_values;
+ float result;
+ bool result_valid;
+
+ ExpressionEvaluator();
+ ExpressionEvaluator(const ValueMap &);
+
+ using ProgramSyntax::NodeVisitor::visit;
+ virtual void visit(ProgramSyntax::Literal &);
+ virtual void visit(ProgramSyntax::ParenthesizedExpression &);
+ virtual void visit(ProgramSyntax::VariableReference &);
+ virtual void visit(ProgramSyntax::UnaryExpression &);
+ virtual void visit(ProgramSyntax::BinaryExpression &);
+ };
+
+ struct ConstantConditionEliminator: BlockModifier
+ {
+ unsigned scope_level;
+ ExpressionEvaluator::ValueMap variable_values;
+
+ ConstantConditionEliminator();
+
+ using Visitor::visit;
+ virtual void visit(ProgramSyntax::Block &);
+ virtual void visit(ProgramSyntax::Assignment &);
+ virtual void visit(ProgramSyntax::VariableDeclaration &);
+ virtual void visit(ProgramSyntax::Conditional &);
+ virtual void visit(ProgramSyntax::Iteration &);
+ };
+
+ struct UnusedVariableLocator: Visitor
+ {
+ struct VariableInfo
+ {
+ bool local;
+ std::vector<ProgramSyntax::Node *> assignments;
+ bool conditionally_assigned;
+ bool referenced;
+
+ VariableInfo();
+ };
+
+ typedef std::set<ProgramSyntax::Node *> ResultType;
+ typedef std::map<ProgramSyntax::VariableDeclaration *, VariableInfo> BlockVariableMap;
+
+ std::set<ProgramSyntax::Node *> unused_nodes;
+ std::map<ProgramSyntax::VariableDeclaration *, ProgramSyntax::Node *> aggregates;
+ ProgramSyntax::Node *aggregate;
+ std::vector<BlockVariableMap> variables;
+ ProgramSyntax::Assignment *assignment;
+ bool assignment_target;
+ bool global_scope;
+
+ UnusedVariableLocator();
+
+ virtual void apply(ProgramSyntax::Stage &);
+ const ResultType &get_result() const { return unused_nodes; }
+ using Visitor::visit;
+ 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);
+ void clear_assignments(VariableInfo &, 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_variables();
+ virtual void visit(ProgramSyntax::Conditional &);
+ virtual void visit(ProgramSyntax::Iteration &);
+ };
+
+ struct UnusedFunctionLocator: Visitor
+ {
+ typedef std::set<ProgramSyntax::Node *> ResultType;
+
+ std::set<ProgramSyntax::Node *> unused_nodes;
+ std::set<ProgramSyntax::FunctionDeclaration *> used_definitions;
+
+ const ResultType &get_result() const { return unused_nodes; }
+ using Visitor::visit;
+ virtual void visit(ProgramSyntax::FunctionCall &);
+ virtual void visit(ProgramSyntax::FunctionDeclaration &);
+ };
+
+ struct NodeRemover: Visitor
+ {
+ std::set<ProgramSyntax::Node *> to_remove;
+
+ NodeRemover() { }
+ NodeRemover(const std::set<ProgramSyntax::Node *> &);
+
+ using Visitor::visit;
+ virtual void visit(ProgramSyntax::Block &);
+ virtual void visit(ProgramSyntax::VariableDeclaration &);
+ };
+
+ struct LegacyConverter: BlockModifier
+ {
+ Version target_version;
+ std::string type;
+ ProgramSyntax::VariableDeclaration *frag_out;
+
+ LegacyConverter();
+ LegacyConverter(const Version &);
+
+ bool check_version(const Version &);
+ using Visitor::visit;
+ virtual void visit(ProgramSyntax::VariableReference &);
+ virtual void visit(ProgramSyntax::Assignment &);
+ virtual void visit(ProgramSyntax::FunctionCall &);
+ virtual void visit(ProgramSyntax::VariableDeclaration &);
+ virtual void visit(ProgramSyntax::InterfaceBlock &);
+ };
+
+ Resources *resources;