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Base iterator stuff compiles :)

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Jesse Beder
2011-09-09 18:46:37 -05:00
parent ff1a8fc59a
commit 9aa3eb56f2
2 changed files with 132 additions and 2 deletions
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110
include/yaml-cpp/value/detail/iterator.h Normal file
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@@ -0,0 +1,110 @@
#ifndef VALUE_DETAIL_ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
#define VALUE_DETAIL_ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
#if defined(_MSC_VER) || (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
#pragma once
#endif
#include "yaml-cpp/dll.h"
#include "yaml-cpp/value/ptr.h"
#include "yaml-cpp/value/value.h"
#include <boost/iterator/iterator_facade.hpp>
#include <boost/utility/enable_if.hpp>
#include <list>
#include <utility>
#include <vector>
namespace YAML
{
namespace detail
{
class node;
struct iterator_value: public Value, std::pair<Value, Value> {
iterator_value() {}
explicit iterator_value(const Value& rhs): Value(rhs) {}
explicit iterator_value(const Value& key, const Value& value): std::pair<Value, Value>(key, value) {}
};
struct iterator_type { enum value { None, Sequence, Map }; };
template<typename V, typename SeqIter, typename MapIter>
class iterator_base: public boost::iterator_facade<iterator_base<V, SeqIter, MapIter>, V, std::bidirectional_iterator_tag>
{
private:
struct enabler {};
public:
iterator_base(): m_type(iterator_type::None) {}
explicit iterator_base(shared_memory_holder pMemory, SeqIter seqIt): m_type(iterator_type::Sequence), m_pMemory(pMemory), m_seqIt(seqIt) {}
explicit iterator_base(shared_memory_holder pMemory, MapIter mapIt): m_type(iterator_type::Map), m_pMemory(pMemory), m_mapIt(mapIt) {}
template<typename W, typename I, typename J>
explicit iterator_base(const iterator_base<W, I, J>& rhs, typename boost::enable_if<boost::is_convertible<W*, V*>, enabler>::type = enabler())
: m_type(rhs.m_type), m_pMemory(rhs.m_pMemory), m_seqIt(rhs.m_seqIt), m_mapIt(rhs.m_mapIt) {}
private:
friend class boost::iterator_core_access;
template<typename, typename, typename> friend class iterator_base;
template<typename W, typename I, typename J>
bool equal(const iterator_base<W, I, J>& rhs) const {
if(m_type != rhs.m_type || m_pMemory != rhs.m_pMemory)
return false;
switch(m_type) {
case iterator_type::None: return true;
case iterator_type::Sequence: return m_seqIt == rhs.m_seqIt;
case iterator_type::Map: return m_mapIt == rhs.m_mapIt;
}
return true;
}
void increment() {
switch(m_type) {
case iterator_type::None: break;
case iterator_type::Sequence: ++m_seqIt; break;
case iterator_type::Map: ++m_mapIt; break;
}
}
void decrement() {
switch(m_type) {
case iterator_type::None: break;
case iterator_type::Sequence: --m_seqIt; break;
case iterator_type::Map: --m_mapIt; break;
}
}
V dereference() {
switch(m_type) {
case iterator_type::None: return V();
case iterator_type::Sequence: return V(Value(*m_seqIt, m_pMemory));
case iterator_type::Map: return V(Value(*m_mapIt->first, m_pMemory), Value(*m_mapIt->second, m_pMemory));
}
return V();
}
private:
typename iterator_type::value m_type;
shared_memory_holder m_pMemory;
SeqIter m_seqIt;
MapIter m_mapIt;
};
typedef std::vector<node *> node_seq;
typedef std::pair<node *, node *> kv_pair;
typedef std::list<kv_pair> node_map;
typedef node_seq::iterator node_seq_iterator;
typedef node_seq::const_iterator node_seq_const_iterator;
typedef node_map::iterator node_map_iterator;
typedef node_map::const_iterator node_map_const_iterator;
}
}
#endif // VALUE_DETAIL_ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66

24
include/yaml-cpp/value/iterator.h
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@@ -11,8 +11,28 @@
namespace YAML
{
class iterator: public detail::iterator_base<detail::iterator_value, detail::node_seq_iterator, detail::node_map_iterator> {};
class const_iterator: public detail::iterator_base<const detail::iterator_value, detail::node_seq_const_iterator, detail::node_map_const_iterator> {};
class iterator: public detail::iterator_base<detail::iterator_value, detail::node_seq_iterator, detail::node_map_iterator>
{
private:
typedef detail::iterator_base<detail::iterator_value, detail::node_seq_iterator, detail::node_map_iterator> base;
public:
iterator() {}
explicit iterator(detail::shared_memory_holder pMemory, detail::node_seq_iterator seqIt): base(pMemory, seqIt) {}
explicit iterator(detail::shared_memory_holder pMemory, detail::node_map_iterator mapIt): base(pMemory, mapIt) {}
};
class const_iterator: public detail::iterator_base<const detail::iterator_value, detail::node_seq_const_iterator, detail::node_map_const_iterator>
{
private:
typedef detail::iterator_base<const detail::iterator_value, detail::node_seq_const_iterator, detail::node_map_const_iterator> base;
public:
const_iterator() {}
explicit const_iterator(detail::shared_memory_holder pMemory, detail::node_seq_const_iterator seqIt): base(pMemory, seqIt) {}
explicit const_iterator(detail::shared_memory_holder pMemory, detail::node_map_const_iterator mapIt): base(pMemory, mapIt) {}
explicit const_iterator(const iterator& rhs): base(rhs) {}
};
}
#endif // VALUE_ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66