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Set the map iterator to filter over undefined items

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This commit is contained in:
beder
2011-09-11 19:44:27 -05:00
parent d4e5a3ea93
commit d8955fc52c
3 changed files with 29 additions and 21 deletions
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3
include/yaml-cpp/node/detail/iterator.h
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@@ -23,7 +23,7 @@ namespace YAML
iterator_base<V>,
node_iterator,
V,
std::bidirectional_iterator_tag>
std::forward_iterator_tag>
{
private:
template<typename> friend class iterator_base;
@@ -42,7 +42,6 @@ namespace YAML
friend class boost::iterator_core_access;
void increment() { this->base_reference() = boost::next(this->base()); }
void decrement() { this->base_reference() = boost::prior(this->base()); }
value_type dereference() const {
const typename base_type::value_type& v = *this->base();

39
include/yaml-cpp/node/detail/node_iterator.h
View File

@@ -54,7 +54,7 @@ namespace YAML
class node_iterator_base: public boost::iterator_facade<
node_iterator_base<V>,
node_iterator_value<V>,
std::bidirectional_iterator_tag,
std::forward_iterator_tag,
node_iterator_value<V> >
{
private:
@@ -67,11 +67,13 @@ namespace YAML
node_iterator_base(): m_type(iterator_type::None) {}
explicit node_iterator_base(SeqIter seqIt): m_type(iterator_type::Sequence), m_seqIt(seqIt) {}
explicit node_iterator_base(MapIter mapIt): m_type(iterator_type::Map), m_mapIt(mapIt) {}
explicit node_iterator_base(MapIter mapIt, MapIter mapEnd): m_type(iterator_type::Map), m_mapIt(mapIt), m_mapEnd(mapEnd) {
m_mapIt = increment_until_defined(m_mapIt);
}
template<typename W>
node_iterator_base(const node_iterator_base<W>& rhs, typename boost::enable_if<boost::is_convertible<W*, V*>, enabler>::type = enabler())
: m_type(rhs.m_type), m_seqIt(rhs.m_seqIt), m_mapIt(rhs.m_mapIt) {}
: m_type(rhs.m_type), m_seqIt(rhs.m_seqIt), m_mapIt(rhs.m_mapIt), m_mapEnd(rhs.m_mapEnd) {}
private:
friend class boost::iterator_core_access;
@@ -93,19 +95,16 @@ namespace YAML
void increment() {
switch(m_type) {
case iterator_type::None: break;
case iterator_type::Sequence: ++m_seqIt; break;
case iterator_type::Map: ++m_mapIt; break;
case iterator_type::Sequence:
++m_seqIt;
break;
case iterator_type::Map:
++m_mapIt;
m_mapIt = increment_until_defined(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;
}
}
value_type dereference() const {
switch(m_type) {
case iterator_type::None: return value_type();
@@ -115,11 +114,21 @@ namespace YAML
return value_type();
}
MapIter increment_until_defined(MapIter it) {
while(it != m_mapEnd && !is_defined(it))
++it;
return it;
}
bool is_defined(MapIter it) const {
return it->first->is_defined() && it->second->is_defined();
}
private:
typename iterator_type::value m_type;
SeqIter m_seqIt;
MapIter m_mapIt;
MapIter m_mapIt, m_mapEnd;
};
typedef node_iterator_base<node> node_iterator;