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tutorial updates

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[SVN r21615]
This commit is contained in:
Dave Abrahams
2004-01-12 02:49:55 +00:00
parent a6b2a098c1
commit 06e1fa88b9
20 changed files with 3805 additions and 325 deletions
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89
example/node_iterator2.hpp
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@ -12,65 +12,62 @@
# include <boost/utility/enable_if.hpp>
# endif
namespace impl
template <class Value>
class node_iter
: public boost::iterator_facade<
node_iter<Value>
, Value
, boost::forward_traversal_tag
>
{
template <class Value>
class node_iterator
: public boost::iterator_facade<
node_iterator<Value>
, Value
, boost::forward_traversal_tag
>
{
private:
enum enabler {};
public:
node_iterator()
: m_node(0)
{}
private:
struct enabler {}; // a private type avoids misuse
explicit node_iterator(Value* p)
: m_node(p)
{}
public:
node_iter()
: m_node(0) {}
template <class OtherValue>
node_iterator(
node_iterator<OtherValue> const& other
explicit node_iter(Value* p)
: m_node(p) {}
template <class OtherValue>
node_iter(
node_iter<OtherValue> const& other
# ifndef BOOST_NO_SFINAE
, typename boost::enable_if<boost::is_convertible<OtherValue*,Value*>,enabler*>::type = 0
, typename boost::enable_if<
boost::is_convertible<OtherValue*,Value*>
, enabler
>::type = enabler()
# endif
)
: m_node(other.m_node)
{
}
)
: m_node(other.m_node) {}
friend class boost::iterator_core_access;
# if !BOOST_WORKAROUND(__GNUC__, == 2)
private: // GCC2 can't even grant that friendship to template member functions
private: // GCC2 can't even grant that friendship to template member functions
# endif
template <class OtherValue>
bool equal(node_iterator<OtherValue> const& other) const
{ return this->m_node == other.m_node; }
public:
void increment()
{ m_node = m_node->next(); }
friend class boost::iterator_core_access;
Value& dereference() const
{ return *m_node; }
template <class OtherValue>
bool equal(node_iter<OtherValue> const& other) const
{
return this->m_node == other.m_node;
}
private:
void increment() { m_node = m_node->next(); }
Value& dereference() const { return *m_node; }
# ifdef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
public:
public:
# else
template <class> friend class node_iterator;
template <class> friend class node_iter;
# endif
Value* m_node;
};
}
Value* m_node;
};
typedef impl::node_iterator<node_base> node_iterator;
typedef impl::node_iterator<node_base const> node_const_iterator;
typedef node_iter<node_base> node_iterator;
typedef node_iter<node_base const> node_const_iterator;
#endif // NODE_ITERATOR2_DWA2004110_HPP