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43 lines
1.5 KiB
43 lines
1.5 KiB
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LIBTEXTCLASSIFIER_UTILS_GRAMMAR_SEMANTICS_EVALUATOR_H_
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#define LIBTEXTCLASSIFIER_UTILS_GRAMMAR_SEMANTICS_EVALUATOR_H_
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#include "utils/base/arena.h"
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#include "utils/base/statusor.h"
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#include "utils/grammar/semantics/eval-context.h"
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#include "utils/grammar/semantics/expression_generated.h"
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#include "utils/grammar/semantics/value.h"
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namespace libtextclassifier3::grammar {
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// Interface for a semantic function that evaluates an expression and returns
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// a semantic value.
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class SemanticExpressionEvaluator {
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public:
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virtual ~SemanticExpressionEvaluator() = default;
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// Applies `expression` to the `context` to produce a semantic value.
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virtual StatusOr<const SemanticValue*> Apply(
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const EvalContext& context, const SemanticExpression* expression,
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UnsafeArena* arena) const = 0;
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};
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} // namespace libtextclassifier3::grammar
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#endif // LIBTEXTCLASSIFIER_UTILS_GRAMMAR_SEMANTICS_EVALUATOR_H_
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