/*
// Copyright (c) 2017 Intel Corporation
// Copyright (c) 2022 IBM Corp.
//
// 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
//
//      http://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.
*/

#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