|  | // SPDX-License-Identifier: Apache-2.0 | 
|  | // SPDX-FileCopyrightText: Copyright 2017 Intel Corporation, 2022 IBM Corp. | 
|  |  | 
|  | #pragma once | 
|  |  | 
|  | #include <optional> | 
|  | #include <string> | 
|  | #include <vector> | 
|  |  | 
|  | namespace expression | 
|  | { | 
|  | enum class Operation | 
|  | { | 
|  | addition, | 
|  | division, | 
|  | multiplication, | 
|  | subtraction, | 
|  | modulo, | 
|  | }; | 
|  |  | 
|  | std::optional<Operation> parseOperation(const std::string& op); | 
|  | int evaluate(int a, Operation op, int b); | 
|  | int evaluate(int substitute, std::vector<std::string>::iterator curr, | 
|  | std::vector<std::string>::iterator& end); | 
|  | } // namespace expression |