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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_SIMPLEOPTION
#define ARM_COMPUTE_UTILS_SIMPLEOPTION
#include "Option.h"
#include <sstream>
#include <stdexcept>
#include <string>
namespace arm_compute
{
namespace utils
{
/** Implementation of an option that accepts a single value. */
template <typename T>
class SimpleOption : public Option
{
public:
using Option::Option;
/** Construct the option with the given default value.
*
* @param[in] name Name of the option.
* @param[in] default_value Default value.
*/
SimpleOption(std::string name, T default_value);
/** Parses the given string.
*
* @param[in] value String representation as passed on the command line.
*
* @return True if the value could be parsed by the specific subclass.
*/
bool parse(std::string value) override;
/** Help message for the option.
*
* @return String representing the help message for the specific subclass.
*/
std::string help() const override;
/** Get the option value.
*
* @return the option value.
*/
const T &value() const;
protected:
T _value{};
};
template <typename T>
inline SimpleOption<T>::SimpleOption(std::string name, T default_value)
: Option{ std::move(name), false, true }, _value{ std::move(default_value) }
{
}
template <typename T>
bool SimpleOption<T>::parse(std::string value)
{
try
{
std::stringstream stream{ std::move(value) };
stream >> _value;
_is_set = !stream.fail();
return _is_set;
}
catch(const std::invalid_argument &)
{
return false;
}
}
template <>
inline bool SimpleOption<std::string>::parse(std::string value)
{
_value = std::move(value);
_is_set = true;
return true;
}
template <typename T>
inline std::string SimpleOption<T>::help() const
{
return "--" + name() + "=VALUE - " + _help;
}
template <typename T>
inline const T &SimpleOption<T>::value() const
{
return _value;
}
} // namespace utils
} // namespace arm_compute
#endif /* ARM_COMPUTE_UTILS_SIMPLEOPTION */
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