34     lower_.emplace(std::move(*l));
42   if (lower_) {  in lower()
43     return {lower_.value().value()};  in lower()
49   lower_.emplace(std::move(expr));  in set_lower()
132   if (lower_) {  in lower()
133     return lower_.value().value();  in lower()
140   lower_.emplace(std::move(expr));  in set_lower()
177   if (!lower_) {  in Fold()
178     lower_ = AsExpr(Constant<SubscriptInteger>{1});  in Fold()
180   lower_.value() = evaluate::Fold(context, std::move(lower_.value().value()));  in Fold()
181   std::optional<ConstantSubscript> lbi{ToInt64(lower_.value().value())};  in Fold()
188     lower_ = AsExpr(Constant<SubscriptInteger>{*lbi});  in Fold()
229       lower_ = AsExpr(Constant<SubscriptInteger>{1});  in Fold()
659   return lower_ == that.lower_ && upper_ == that.upper_ &&  in operator ==()
675   return parent_ == that.parent_ && lower_ == that.lower_ &&  in operator ==()