/usr/include/camp/detail/returntype.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.
**
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** of this software and associated documentation files (the "Software"), to deal
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#ifndef CAMP_DETAIL_RETURNTYPE_HPP
#define CAMP_DETAIL_RETURNTYPE_HPP
namespace camp
{
namespace detail
{
/**
* \class ReturnType
*
* \brief Utility class used at compile-time to which type to use to avoid copying the returned object
*
* \li If T is a reference or a pointer type, ReturnType<T>::Type is T
* \li Otherwise, ReturnType<T>::Type is T&
*/
template <typename T> struct ReturnType {typedef T& Type;};
template <typename T> struct ReturnType<T&> {typedef T& Type;};
template <typename T> struct ReturnType<T*> {typedef T* Type;};
} // namespace detail
} // namespace camp
#endif // CAMP_DETAIL_RETURNTYPE_HPP
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