| // Copyright 2020 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| |
| #include "utils/grammar/semantics/evaluators/merge-values-eval.h" |
| |
| namespace libtextclassifier3::grammar { |
| |
| StatusOr<const SemanticValue*> MergeValuesEvaluator::Apply( |
| const EvalContext& context, const SemanticExpression* expression, |
| UnsafeArena* arena) const { |
| const MergeValueExpression* merge_value_expression = |
| expression->expression_as_MergeValueExpression(); |
| std::unique_ptr<MutableFlatbuffer> result = |
| semantic_value_builder_.NewTable(merge_value_expression->type()); |
| |
| if (result == nullptr) { |
| return Status(StatusCode::INVALID_ARGUMENT, "Invalid result type."); |
| } |
| |
| for (const SemanticExpression* semantic_expression : |
| *merge_value_expression->values()) { |
| TC3_ASSIGN_OR_RETURN(const SemanticValue* value, |
| composer_->Apply(context, semantic_expression, arena)); |
| if (value == nullptr) { |
| continue; |
| } |
| if ((value->type() != result->type()) || |
| !result->MergeFrom(value->Table())) { |
| return Status(StatusCode::INVALID_ARGUMENT, |
| "Could not merge the results."); |
| } |
| } |
| return SemanticValue::Create<const MutableFlatbuffer*>(result.get(), arena); |
| } |
| |
| } // namespace libtextclassifier3::grammar |