// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
-// See http://www.boost.org/libs/smart_ptr/scoped_array.htm for documentation.
+// http://www.boost.org/libs/smart_ptr/scoped_array.htm
//
#include <boost/assert.hpp>
#include <boost/checked_delete.hpp>
#include <boost/config.hpp> // in case ptrdiff_t not in std
+
+#include <boost/detail/workaround.hpp>
+
#include <cstddef> // for std::ptrdiff_t
namespace boost
{
+// Debug hooks
+
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+
+void sp_array_constructor_hook(void * p);
+void sp_array_destructor_hook(void * p);
+
+#endif
+
// scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to
// is guaranteed, either on destruction of the scoped_array or via an explicit
// reset(). Use shared_array or std::vector if your needs are more complex.
-template<typename T> class scoped_array // noncopyable
+template<class T> class scoped_array // noncopyable
{
private:
scoped_array(scoped_array const &);
scoped_array & operator=(scoped_array const &);
+ typedef scoped_array<T> this_type;
+
public:
typedef T element_type;
explicit scoped_array(T * p = 0) : ptr(p) // never throws
{
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+ boost::sp_array_constructor_hook(ptr);
+#endif
}
~scoped_array() // never throws
{
- checked_array_delete(ptr);
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+ boost::sp_array_destructor_hook(ptr);
+#endif
+ boost::checked_array_delete(ptr);
}
void reset(T * p = 0) // never throws
{
- if (ptr != p)
- {
- checked_array_delete(ptr);
- ptr = p;
- }
+ BOOST_ASSERT(p == 0 || p != ptr); // catch self-reset errors
+ this_type(p).swap(*this);
}
T & operator[](std::ptrdiff_t i) const // never throws
return ptr;
}
+ // implicit conversion to "bool"
+
+#if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530)
+
+ operator bool () const
+ {
+ return ptr != 0;
+ }
+
+#else
+
+ typedef T * (this_type::*unspecified_bool_type)() const;
+
+ operator unspecified_bool_type() const // never throws
+ {
+ return ptr == 0? 0: &this_type::get;
+ }
+
+#endif
+
+ bool operator! () const // never throws
+ {
+ return ptr == 0;
+ }
+
void swap(scoped_array & b) // never throws
{
T * tmp = b.ptr;