Incomplete work for using Boost.Polygon to compute medial axis

xs/src/boost/smart_ptr/scoped_ptr.hpp

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+#ifndef BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED
+#define BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED
+
+//  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
+//  Copyright (c) 2001, 2002 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//  http://www.boost.org/libs/smart_ptr/scoped_ptr.htm
+//
+
+#include <boost/config.hpp>
+#include <boost/assert.hpp>
+#include <boost/checked_delete.hpp>
+#include <boost/smart_ptr/detail/sp_nullptr_t.hpp>
+#include <boost/detail/workaround.hpp>
+
+#ifndef BOOST_NO_AUTO_PTR
+# include <memory>          // for std::auto_ptr
+#endif
+
+namespace boost
+{
+
+// Debug hooks
+
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+
+void sp_scalar_constructor_hook(void * p);
+void sp_scalar_destructor_hook(void * p);
+
+#endif
+
+//  scoped_ptr mimics a built-in pointer except that it guarantees deletion
+//  of the object pointed to, either on destruction of the scoped_ptr or via
+//  an explicit reset(). scoped_ptr is a simple solution for simple needs;
+//  use shared_ptr or std::auto_ptr if your needs are more complex.
+
+template<class T> class scoped_ptr // noncopyable
+{
+private:
+
+    T * px;
+
+    scoped_ptr(scoped_ptr const &);
+    scoped_ptr & operator=(scoped_ptr const &);
+
+    typedef scoped_ptr<T> this_type;
+
+    void operator==( scoped_ptr const& ) const;
+    void operator!=( scoped_ptr const& ) const;
+
+public:
+
+    typedef T element_type;
+
+    explicit scoped_ptr( T * p = 0 ): px( p ) // never throws
+    {
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        boost::sp_scalar_constructor_hook( px );
+#endif
+    }
+
+#ifndef BOOST_NO_AUTO_PTR
+
+    explicit scoped_ptr( std::auto_ptr<T> p ) BOOST_NOEXCEPT : px( p.release() )
+    {
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        boost::sp_scalar_constructor_hook( px );
+#endif
+    }
+
+#endif
+
+    ~scoped_ptr() // never throws
+    {
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        boost::sp_scalar_destructor_hook( px );
+#endif
+        boost::checked_delete( px );
+    }
+
+    void reset(T * p = 0) // never throws
+    {
+        BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors
+        this_type(p).swap(*this);
+    }
+
+    T & operator*() const // never throws
+    {
+        BOOST_ASSERT( px != 0 );
+        return *px;
+    }
+
+    T * operator->() const // never throws
+    {
+        BOOST_ASSERT( px != 0 );
+        return px;
+    }
+
+    T * get() const BOOST_NOEXCEPT
+    {
+        return px;
+    }
+
+// implicit conversion to "bool"
+#include <boost/smart_ptr/detail/operator_bool.hpp>
+
+    void swap(scoped_ptr & b) BOOST_NOEXCEPT
+    {
+        T * tmp = b.px;
+        b.px = px;
+        px = tmp;
+    }
+};
+
+#if !defined( BOOST_NO_CXX11_NULLPTR )
+
+template<class T> inline bool operator==( scoped_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
+{
+    return p.get() == 0;
+}
+
+template<class T> inline bool operator==( boost::detail::sp_nullptr_t, scoped_ptr<T> const & p ) BOOST_NOEXCEPT
+{
+    return p.get() == 0;
+}
+
+template<class T> inline bool operator!=( scoped_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
+{
+    return p.get() != 0;
+}
+
+template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, scoped_ptr<T> const & p ) BOOST_NOEXCEPT
+{
+    return p.get() != 0;
+}
+
+#endif
+
+template<class T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) BOOST_NOEXCEPT
+{
+    a.swap(b);
+}
+
+// get_pointer(p) is a generic way to say p.get()
+
+template<class T> inline T * get_pointer(scoped_ptr<T> const & p) BOOST_NOEXCEPT
+{
+    return p.get();
+}
+
+} // namespace boost
+
+#endif // #ifndef BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED