1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef LIBTEXTCLASSIFIER_UTILS_GRAMMAR_SEMANTICS_EVALUATORS_COMPOSE_EVAL_H_ 18 #define LIBTEXTCLASSIFIER_UTILS_GRAMMAR_SEMANTICS_EVALUATORS_COMPOSE_EVAL_H_ 19 20 #include "utils/base/arena.h" 21 #include "utils/flatbuffers/mutable.h" 22 #include "utils/grammar/semantics/eval-context.h" 23 #include "utils/grammar/semantics/evaluator.h" 24 #include "utils/grammar/semantics/expression_generated.h" 25 #include "utils/grammar/semantics/value.h" 26 27 namespace libtextclassifier3::grammar { 28 29 // Combines arguments to a result type. 30 class ComposeEvaluator : public SemanticExpressionEvaluator { 31 public: ComposeEvaluator(const SemanticExpressionEvaluator * composer,const reflection::Schema * semantic_values_schema)32 explicit ComposeEvaluator(const SemanticExpressionEvaluator* composer, 33 const reflection::Schema* semantic_values_schema) 34 : composer_(composer), semantic_value_builder_(semantic_values_schema) {} 35 36 StatusOr<const SemanticValue*> Apply(const EvalContext& context, 37 const SemanticExpression* expression, 38 UnsafeArena* arena) const override; 39 40 private: 41 const SemanticExpressionEvaluator* composer_; 42 const MutableFlatbufferBuilder semantic_value_builder_; 43 }; 44 45 } // namespace libtextclassifier3::grammar 46 47 #endif // LIBTEXTCLASSIFIER_UTILS_GRAMMAR_SEMANTICS_EVALUATORS_COMPOSE_EVAL_H_ 48