Viewing file:  pr39362.C (2.5 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-additional-options "-Wno-return-type" } */
void *fastMalloc (int n);
void fastFree (void *p);
template <class T> struct C
{
void deref () { delete static_cast <T *>(this); }
};
template <typename T>
struct D
{
D (T *ptr) : m_ptr (ptr) { }
~D () { if (T * ptr = m_ptr) ptr->deref (); }
T *operator-> () const;
T *m_ptr;
typedef T *UnspecifiedBoolType;
operator UnspecifiedBoolType () const;
};
template <typename T> struct E
{
static void destruct (T * begin, T * end)
{
for (T * cur = begin; cur != end; ++cur)
cur->~T ();
}
};
template <typename T> class F;
template <typename T> struct G
{
static void destruct (T * begin, T * end)
{
E <T>::destruct (begin, end);
}
static void uninitializedFill (T * dst, T * dstEnd, const T & val)
{
F<T>::uninitializedFill (dst, dstEnd, val);
}
};
template <typename T> struct H
{
void allocateBuffer (int newCapacity)
{
m_buffer = static_cast <T *>(fastMalloc (newCapacity * sizeof (T)));
}
void deallocateBuffer (T * bufferToDeallocate)
{
if (m_buffer == bufferToDeallocate)
fastFree (bufferToDeallocate);
}
T *buffer () { }
int capacity () const { }
T *m_buffer;
};
template <typename T, int cap> class I;
template <typename T> struct I <T, 0> : H <T>
{
I (int capacity) { allocateBuffer (capacity); }
~I () { this->deallocateBuffer (buffer ()); }
using H <T>::allocateBuffer;
H <T>::buffer; // { dg-warning "deprecated" }
};
template <typename T, int cap = 0> struct J
{
typedef T *iterator;
~J () { if (m_size) shrink (0); }
J (const J &);
int capacity () const { m_buffer.capacity (); }
T & operator[](int i) { }
iterator begin () { }
iterator end () { return begin () + m_size; }
void shrink (int size);
template <typename U> void append (const U &);
int m_size;
I <T, cap> m_buffer;
};
template <typename T, int cap>
J <T, cap>::J (const J & other) : m_buffer (other.capacity ())
{
}
template <typename T, int cap>
void J <T, cap>::shrink (int size)
{
G <T>::destruct (begin () + size, end ());
m_size = size;
}
struct A : public C <A>
{
virtual ~A ();
typedef J <D <A> > B;
virtual A *firstChild () const;
virtual A *nextSibling () const;
virtual const B & children (int length);
B m_children;
};
const A::B &
A::children (int length)
{
for (D <A> obj = firstChild (); obj; obj = obj->nextSibling ())
{
B children = obj->children (2);
for (unsigned i = 0; i <length; ++i)
m_children.append (children[i]);
}
}
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