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/*
* Copyright (c) 2017-2018 Arm Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef ARM_COMPUTE_UTILS_ENUMOPTION
#define ARM_COMPUTE_UTILS_ENUMOPTION
#include "SimpleOption.h"
#include <set>
#include <sstream>
#include <stdexcept>
#include <string>
namespace arm_compute
{
namespace utils
{
/** Implementation of a simple option that accepts a value from a fixed set. */
template <typename T>
class EnumOption : public SimpleOption<T>
{
public:
/** Construct option with allowed values.
*
* @param[in] name Name of the option.
* @param[in] allowed_values Set of allowed values for the option.
*/
EnumOption(std::string name, std::set<T> allowed_values);
/** Construct option with allowed values, a fixed number of accepted values and default values for the option.
*
* @param[in] name Name of the option.
* @param[in] allowed_values Set of allowed values for the option.
* @param[in] default_value Default value.
*/
EnumOption(std::string name, std::set<T> allowed_values, T default_value);
bool parse(std::string value) override;
std::string help() const override;
/** Get the selected value.
*
* @return get the selected enum value.
*/
const T &value() const;
private:
std::set<T> _allowed_values{};
};
template <typename T>
inline EnumOption<T>::EnumOption(std::string name, std::set<T> allowed_values)
: SimpleOption<T>{std::move(name)}, _allowed_values{std::move(allowed_values)}
{
}
template <typename T>
inline EnumOption<T>::EnumOption(std::string name, std::set<T> allowed_values, T default_value)
: SimpleOption<T>{std::move(name), std::move(default_value)}, _allowed_values{std::move(allowed_values)}
{
}
template <typename T>
bool EnumOption<T>::parse(std::string value)
{
try
{
std::stringstream stream{value};
T typed_value{};
stream >> typed_value;
if (!stream.fail())
{
if (_allowed_values.count(typed_value) == 0)
{
return false;
}
this->_value = std::move(typed_value);
this->_is_set = true;
return true;
}
return false;
}
catch (const std::invalid_argument &)
{
return false;
}
}
template <typename T>
std::string EnumOption<T>::help() const
{
std::stringstream msg;
msg << "--" + this->name() + "={";
for (const auto &value : _allowed_values)
{
msg << value << ",";
}
msg << "} - " << this->_help;
return msg.str();
}
template <typename T>
inline const T &EnumOption<T>::value() const
{
return this->_value;
}
} // namespace utils
} // namespace arm_compute
#endif /* ARM_COMPUTE_UTILS_ENUMOPTION */
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