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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
// NScD Oak Ridge National Laboratory, European Spallation Source
// & Institut Laue - Langevin
// SPDX - License - Identifier: GPL - 3.0 +
#ifndef MANTID_ISISREFLECTOMETRY_RESULT_H
#define MANTID_ISISREFLECTOMETRY_RESULT_H
#include <boost/optional.hpp>
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namespace MantidQt {
namespace CustomInterfaces {
template <typename Validated, typename Error = boost::blank>
class ValidationResult {
public:
explicit ValidationResult(Validated validItem);
explicit ValidationResult(Error validationErrors);
ValidationResult();
bool isValid() const;
bool isError() const;
Validated const &assertValid() const;
Error const &assertError() const;
boost::optional<Validated> validElseNone() const;
private:
boost::variant<Validated, Error> m_innerResult;
};
template <typename Validated, typename Error>
ValidationResult<Validated, Error>::ValidationResult()
: m_innerResult(boost::blank()) {}
template <typename Validated, typename Error>
ValidationResult<Validated, Error>::ValidationResult(Validated validItem)
: m_innerResult(std::move(validItem)) {}
template <typename Validated, typename Error>
ValidationResult<Validated, Error>::ValidationResult(Error validationErrors)
: m_innerResult(std::move(validationErrors)) {}
template <typename Validated, typename Error>
bool ValidationResult<Validated, Error>::isValid() const {
return m_innerResult.which() == 0;
}
template <typename Validated, typename Error>
bool ValidationResult<Validated, Error>::isError() const {
return m_innerResult.which() == 1;
}
template <typename Validated, typename Error>
Validated const &ValidationResult<Validated, Error>::assertValid() const {
return boost::get<Validated>(m_innerResult);
}
template <typename Validated, typename Error>
Error const &ValidationResult<Validated, Error>::assertError() const {
return boost::get<Error>(m_innerResult);
}
template <typename Validated, typename Error>
boost::optional<Validated>
ValidationResult<Validated, Error>::validElseNone() const {
if (isValid())
return assertValid();
else
return boost::none;
}
} // namespace CustomInterfaces
} // namespace MantidQt
#endif // MANTID_ISISREFLECTOMETRY_RESULT_H