+/** Manipulates specialization constants. If values are specified, turns
+specialization constants into normal constants. Without values assigns
+automatic constant_ids to specialization constants. */
+class ConstantSpecializer: private TraversingVisitor
+{
+private:
+ const std::map<std::string, int> *values;
+
+public:
+ ConstantSpecializer();
+
+ void apply(Stage &, const std::map<std::string, int> *);
+
+private:
+ virtual void visit(VariableDeclaration &);
+};
+
+/** Forms links between nested blocks in the syntax tree. */
+class BlockHierarchyResolver: private TraversingVisitor
+{
+public:
+ void apply(Stage &s) { s.content.visit(*this); }
+
+private:
+ virtual void enter(Block &);
+};
+
+/** Resolves types of variables and base types of other types. */
+class TypeResolver: private TraversingVisitor
+{
+private:
+ Stage *stage;
+
+public:
+ TypeResolver();
+
+ void apply(Stage &);
+
+private:
+ virtual void visit(BasicTypeDeclaration &);
+ virtual void visit(ImageTypeDeclaration &);
+ virtual void visit(StructDeclaration &);
+ virtual void visit(VariableDeclaration &);
+};
+
+/** Resolves variable references. Variable references which match the name
+of an interface block are turned into interface block references. */