noncopyable.h

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#ifndef LIPH_LANG_NONCOPYABLE_H_
#define LIPH_LANG_NONCOPYABLE_H_
 
// from boost::noncopyable
// https://www.boost.org/users/license.html
 
namespace liph {
 
//  Private copy constructor and copy assignment ensure classes derived from
//  class noncopyable cannot be copied.
 
namespace noncopyable_ {  // protection from unintended ADL
 
#ifndef BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED
#define BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED
 
// noncopyable derives from base_token to enable Type Traits to detect
// whether a type derives from noncopyable without needing the definition
// of noncopyable itself.
//
// The definition of base_token is macro-guarded so that Type Traits can
// define it locally without including this header, to avoid a dependency
// on Core.
 
struct base_token {};
 
#endif  // #ifndef BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED
 
// class noncopyable : base_token {
class noncopyable {
protected:
    constexpr noncopyable() = default;
    ~noncopyable() = default;
 
    noncopyable(const noncopyable&) = delete;
    noncopyable& operator=(const noncopyable&) = delete;
};
 
}  // namespace noncopyable_
 
typedef noncopyable_::noncopyable noncopyable;
 
}  // namespace liph
 
#endif  // LIPH_LANG_NONCOPYABLE_H_