+void NodeVisitor::visit(Assignment &assign)
+{
+ visit(static_cast<BinaryExpression &>(assign));
+}
+
+
+void TraversingVisitor::visit(Block &block)
+{
+ for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
+ (*i)->visit(*this);
+}
+
+void TraversingVisitor::visit(ParenthesizedExpression &parexpr)
+{
+ parexpr.expression->visit(*this);
+}
+
+void TraversingVisitor::visit(MemberAccess &memacc)
+{
+ memacc.left->visit(*this);
+}
+
+void TraversingVisitor::visit(UnaryExpression &unary)
+{
+ unary.expression->visit(*this);
+}
+
+void TraversingVisitor::visit(BinaryExpression &binary)
+{
+ binary.left->visit(*this);
+ binary.right->visit(*this);
+}
+
+void TraversingVisitor::visit(FunctionCall &call)
+{
+ for(NodeArray<Expression>::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
+ (*i)->visit(*this);
+}
+
+void TraversingVisitor::visit(ExpressionStatement &expr)
+{
+ expr.expression->visit(*this);
+}
+
+void TraversingVisitor::visit(InterfaceLayout &layout)
+{
+ layout.layout.visit(*this);
+}
+
+void TraversingVisitor::visit(StructDeclaration &strct)
+{
+ strct.members.visit(*this);
+}
+
+void TraversingVisitor::visit(VariableDeclaration &var)
+{
+ if(var.layout)
+ var.layout->visit(*this);
+ if(var.init_expression)
+ var.init_expression->visit(*this);
+ if(var.array_size)
+ var.array_size->visit(*this);
+}
+
+void TraversingVisitor::visit(InterfaceBlock &iface)
+{
+ iface.members.visit(*this);
+}
+
+void TraversingVisitor::visit(FunctionDeclaration &func)
+{
+ for(NodeArray<VariableDeclaration>::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
+ (*i)->visit(*this);
+ func.body.visit(*this);
+}
+
+void TraversingVisitor::visit(Conditional &cond)
+{
+ cond.condition->visit(*this);
+ cond.body.visit(*this);
+ cond.else_body.visit(*this);
+}
+
+void TraversingVisitor::visit(Iteration &iter)
+{
+ if(iter.init_statement)
+ iter.init_statement->visit(*this);
+ if(iter.condition)
+ iter.condition->visit(*this);
+ if(iter.loop_expression)
+ iter.loop_expression->visit(*this);
+ iter.body.visit(*this);
+}
+
+void TraversingVisitor::visit(Passthrough &pass)
+{
+ if(pass.subscript)
+ pass.subscript->visit(*this);
+}
+
+void TraversingVisitor::visit(Return &ret)
+{
+ if(ret.expression)
+ ret.expression->visit(*this);
+}
+
+
+Stage::Stage(StageType t):