case AttrValue::kTensor:
    case AttrValue::kFunc:
    case AttrValue::kPlaceholder:
      LOG(ERROR) << "Unexpected non-primitive attribute value.";
      return "/* ERROR */";
  }
}

string AttrView::VariableStrLen() const {
  return Call("strlen", {VariableName()});
}

string AttrView::VariableSpanData() const {
  return Call(VariableName(), "data", {}, ".");
}

string AttrView::VariableSpanLen() const {

namespace cpp {

class AttrView {
 public:
  explicit AttrView(AttrSpec attr) : attr_(attr) {}

  string VariableName() const;
  string VariableType() const;
  string AttrNameString() const;
  string VariableStrLen() const;
  string VariableSpanData() const;
  string VariableSpanLen() const;
  string DefaultValue() const;
  string InputArg(bool with_default_value) const;
  string SetterMethod() const;