TypeTraits.h

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/*
 * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */
 
#ifndef SQUID_SRC_BASE_TYPETRAITS_H
#define SQUID_SRC_BASE_TYPETRAITS_H
 
#include <type_traits>
 
namespace TypeTraits_ { // a hack to prevent "unintended ADL"
 
// TODO: Extract reusable paradigms into other mixins (e.g., NonCopyable).
class Interface
{
public:
    // ensures proper destruction via pointers to base interface classes
    virtual ~Interface() = default;
 
    // prohibits copy/move assignment to prevent accidental object slicing
    Interface &operator=(const Interface &) = delete;
    Interface &operator=(Interface &&) = delete;
 
protected: // prevents accidental creation of Interface instances
 
    // allows default-construction in kids
    constexpr Interface() = default;
 
    // allows copy/move construction for kids convenience
    Interface(const Interface &) = default;
    Interface(Interface &&) = default;
};
 
} // namespace TypeTraits_
 
using Interface = TypeTraits_::Interface;
 
#endif /* SQUID_SRC_BASE_TYPETRAITS_H */