hmz007
36ed224bac
Signed-off-by: hmz007 <hmz007@gmail.com> Change-Id: Ib87fdbe7a0be7dc961af3500fe9ea4589a127f9f
48 lines
1.8 KiB
C++
48 lines
1.8 KiB
C++
/*
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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_EVALUATORS_ARITHMETIC_EVAL_H_
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#define LIBTEXTCLASSIFIER_UTILS_GRAMMAR_SEMANTICS_EVALUATORS_ARITHMETIC_EVAL_H_
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#include "utils/base/arena.h"
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#include "utils/grammar/semantics/eval-context.h"
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#include "utils/grammar/semantics/evaluator.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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// Evaluates an arithmetic expression.
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// Expects zero or more arguments and produces either sum, product, minimum or
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// maximum of its arguments. If no arguments are specified, each operator
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// returns its identity value.
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class ArithmeticExpressionEvaluator : public SemanticExpressionEvaluator {
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public:
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explicit ArithmeticExpressionEvaluator(
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const SemanticExpressionEvaluator* composer)
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: composer_(composer) {}
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StatusOr<const SemanticValue*> Apply(const EvalContext& context,
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const SemanticExpression* expression,
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UnsafeArena* arena) const override;
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private:
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const SemanticExpressionEvaluator* composer_;
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};
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} // namespace libtextclassifier3::grammar
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#endif // LIBTEXTCLASSIFIER_UTILS_GRAMMAR_SEMANTICS_EVALUATORS_ARITHMETIC_EVAL_H_
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