| 30 | namespace google::api::expr::runtime { |
| 31 | |
| 32 | class ComprehensionSlot final { |
| 33 | public: |
| 34 | ComprehensionSlot() = default; |
| 35 | ComprehensionSlot(const ComprehensionSlot&) = delete; |
| 36 | ComprehensionSlot(ComprehensionSlot&&) = delete; |
| 37 | ComprehensionSlot& operator=(const ComprehensionSlot&) = delete; |
| 38 | ComprehensionSlot& operator=(ComprehensionSlot&&) = delete; |
| 39 | |
| 40 | const cel::Value& value() const ABSL_ATTRIBUTE_LIFETIME_BOUND { |
| 41 | ABSL_DCHECK(Has()); |
| 42 | |
| 43 | return value_; |
| 44 | } |
| 45 | |
| 46 | cel::Value* absl_nonnull mutable_value() ABSL_ATTRIBUTE_LIFETIME_BOUND { |
| 47 | ABSL_DCHECK(Has()); |
| 48 | |
| 49 | return &value_; |
| 50 | } |
| 51 | |
| 52 | const AttributeTrail& attribute() const ABSL_ATTRIBUTE_LIFETIME_BOUND { |
| 53 | ABSL_DCHECK(Has()); |
| 54 | |
| 55 | return attribute_; |
| 56 | } |
| 57 | |
| 58 | AttributeTrail* absl_nonnull mutable_attribute() |
| 59 | ABSL_ATTRIBUTE_LIFETIME_BOUND { |
| 60 | ABSL_DCHECK(Has()); |
| 61 | |
| 62 | return &attribute_; |
| 63 | } |
| 64 | |
| 65 | bool Has() const { return has_; } |
| 66 | |
| 67 | void Set() { Set(cel::NullValue(), absl::nullopt); } |
| 68 | |
| 69 | template <typename V> |
| 70 | void Set(V&& value) { |
| 71 | Set(std::forward<V>(value), absl::nullopt); |
| 72 | } |
| 73 | |
| 74 | template <typename V, typename A> |
| 75 | void Set(V&& value, A&& attribute) { |
| 76 | value_ = std::forward<V>(value); |
| 77 | attribute_ = std::forward<A>(attribute); |
| 78 | has_ = true; |
| 79 | } |
| 80 | |
| 81 | void Clear() { |
| 82 | if (has_) { |
| 83 | value_ = cel::NullValue(); |
| 84 | attribute_ = absl::nullopt; |
| 85 | has_ = false; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | private: |