/usr/include/camp/detail/valueimpl.hpp is in libcamp-dev 0.8.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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**
** Copyright (C) 2009-2014 TEGESO/TEGESOFT and/or its subsidiary(-ies) and mother company.
** Contact: Tegesoft Information (contact@tegesoft.com)
**
** This file is part of the CAMP library.
**
** The MIT License (MIT)
**
** Copyright (C) 2009-2014 TEGESO/TEGESOFT and/or its subsidiary(-ies) and mother company.
**
** 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
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****************************************************************************/
#ifndef CAMP_DETAIL_VALUEIMPL_HPP
#define CAMP_DETAIL_VALUEIMPL_HPP
#include <camp/type.hpp>
#include <camp/valuemapper.hpp>
#include <camp/errors.hpp>
#ifndef Q_MOC_RUN
#include <boost/variant/static_visitor.hpp>
#endif
namespace camp
{
namespace detail
{
/**
* \brief Value visitor which converts the stored value to a type T
*/
template <typename T>
struct ConvertVisitor : public boost::static_visitor<T>
{
template <typename U>
T operator()(const U& value) const
{
// Dispatch to the proper ValueConverter
return camp_ext::ValueMapper<T>::from(value);
}
T operator()(const T& value) const
{
// Optimization when source type is the same as requested type
return value;
}
T operator()(NoType) const
{
// Error: trying to convert an empty value
CAMP_ERROR(BadType(noType, mapType<T>()));
}
};
/**
* \brief Binary value visitor which compares two values using operator <
*/
struct LessThanVisitor : public boost::static_visitor<bool>
{
template <typename T, typename U>
bool operator()(const T&, const U&) const
{
// Different types : compare types identifiers
return mapType<T>() < mapType<U>();
}
template <typename T>
bool operator()(const T& v1, const T& v2) const
{
// Same types : compare values
return v1 < v2;
}
bool operator()(NoType, NoType) const
{
// No type (empty values) : they're considered equal
return false;
}
};
/**
* \brief Binary value visitor which compares two values using operator ==
*/
struct EqualVisitor : public boost::static_visitor<bool>
{
template <typename T, typename U>
bool operator()(const T&, const U&) const
{
// Different types : not equal
return false;
}
template <typename T>
bool operator()(const T& v1, const T& v2) const
{
// Same types : compare values
return v1 == v2;
}
bool operator()(NoType, NoType) const
{
// No type (empty values) : they're considered equal
return true;
}
};
} // namespace detail
} // namespace camp
#endif // CAMP_DETAIL_VALUEIMPL_HPP
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