+ virtual void visit(InterfaceBlock &);
+ virtual void visit(FunctionDeclaration &);
+};
+
+class ExpressionValidator: private Validator
+{
+private:
+ FunctionDeclaration *current_function;
+
+public:
+ ExpressionValidator();
+
+ void apply(Stage &s) { stage = &s; s.content.visit(*this); }
+
+private:
+ virtual void visit(Swizzle &);
+ virtual void visit(UnaryExpression &);
+ virtual void visit(BinaryExpression &);
+ virtual void visit(Assignment &);
+ virtual void visit(TernaryExpression &);
+ virtual void visit(VariableDeclaration &);
+ virtual void visit(FunctionDeclaration &);
+ virtual void visit(Return &);
+};
+
+class StageInterfaceValidator: private Validator
+{
+private:
+ std::map<std::string, std::map<unsigned, VariableDeclaration *> > used_locations;
+
+public:
+ void apply(Stage &s) { stage = &s; s.content.visit(*this); }
+
+private:
+ int get_location(const Layout &);
+
+ virtual void visit(VariableDeclaration &);
+ virtual void visit(FunctionDeclaration &) { }
+};
+
+class GlobalInterfaceValidator: private Validator
+{
+private:
+ struct Binding
+ {
+ Node *node;
+ TypeDeclaration *type;
+ std::string name;
+
+ Binding(VariableDeclaration &v): node(&v), type(v.type_declaration), name(v.name) { }
+ Binding(InterfaceBlock &i): node(&i), type(i.struct_declaration), name(i.block_name) { }
+ };
+
+ std::map<unsigned, std::map<unsigned, Binding> > used_bindings;
+
+public:
+ void apply(Module &);
+
+private:
+ void get_binding(const Layout &, unsigned &, int &);
+ void check_binding(const Layout &, const Binding &);
+
+ virtual void visit(VariableDeclaration &);
+ virtual void visit(InterfaceBlock &);
+ virtual void visit(FunctionDeclaration &) { }