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namespace antlr3 {
template<class ImplTraits>
RewriteRuleSubtreeStream<ImplTraits>::RewriteRuleSubtreeStream(TreeAdaptorType* adaptor, const char* description)
: m_adaptor(adaptor)
, m_elementDescription(description)
, m_dirty(false)
{
m_cursor = m_elements.begin();
}
template<class ImplTraits>
RewriteRuleSubtreeStream<ImplTraits>::RewriteRuleSubtreeStream(TreeAdaptorType* adaptor, const char* description,
TreeType* oneElement
)
: m_adaptor(adaptor)
, m_elementDescription(description)
, m_dirty(false)
{
if( oneElement != NULL )
{
auto tree_clone = this->dup(oneElement);
this->add( tree_clone );
}
m_cursor = m_elements.begin();
}
template<class ImplTraits>
RewriteRuleSubtreeStream<ImplTraits>::RewriteRuleSubtreeStream(TreeAdaptorType* adaptor, const char* description,
TreeTypePtr& oneElement
)
: m_adaptor(adaptor)
, m_elementDescription(description)
, m_dirty(false)
{
if( oneElement != NULL )
this->add( oneElement );
m_cursor = m_elements.begin();
}
template<class ImplTraits>
RewriteRuleSubtreeStream<ImplTraits>::RewriteRuleSubtreeStream(TreeAdaptorType* adaptor, const char* description,
const ElementsType& elements
)
: m_adaptor(adaptor)
, m_elementDescription(description)
, m_dirty(false)
, m_elements(elements)
{
m_cursor = m_elements.begin();
}
template<class ImplTraits>
void
RewriteRuleSubtreeStream<ImplTraits>::reset()
{
m_cursor = m_elements.begin();
m_dirty = true;
}
template<class ImplTraits>
void
RewriteRuleSubtreeStream<ImplTraits>::add(TreeTypePtr& el)
{
if ( el == NULL )
return;
m_elements.push_back(std::move(el));
m_cursor = m_elements.begin();
}
template<class ImplTraits>
typename RewriteRuleSubtreeStream<ImplTraits>::ElementsType::iterator
RewriteRuleSubtreeStream<ImplTraits>::_next()
{
if (m_elements.empty())
{
// This means that the stream is empty
// Caller must cope with this (TODO throw RewriteEmptyStreamException)
return m_elements.end();
}
if (m_dirty || m_cursor == m_elements.end())
{
if( m_elements.size() == 1)
{
// Special case when size is single element, it will just dup a lot
return m_elements.begin();
}
// Out of elements and the size is not 1, so we cannot assume
// that we just duplicate the entry n times (such as ID ent+ -> ^(ID ent)+)
// This means we ran out of elements earlier than was expected.
//
return m_elements.end(); // Caller must cope with this (TODO throw RewriteEmptyStreamException)
}
// More than just a single element so we extract it from the
// vector.
return m_cursor++;
}
template<class ImplTraits>
typename RewriteRuleSubtreeStream<ImplTraits>::TreeTypePtr
RewriteRuleSubtreeStream<ImplTraits>::nextTree()
{
if ( m_dirty || ( m_cursor == m_elements.end() && m_elements.size() == 1 ))
{
// if out of elements and size is 1, dup
typename ElementsType::iterator el = this->_next();
return this->dup(*el);
}
// test size above then fetch
typename ElementsType::iterator el = this->_next();
return std::move(*el);
}
/*
template<class ImplTraits, class SuperType>
typename RewriteRuleSubtreeStream<ImplTraits, SuperType>::TokenType*
RewriteRuleSubtreeStream<ImplTraits, SuperType>::nextToken()
{
return this->_next();
}
template<class ImplTraits, class SuperType>
typename RewriteRuleSubtreeStream<ImplTraits, SuperType>::TokenType*
RewriteRuleSubtreeStream<ImplTraits, SuperType>::next()
{
ANTLR_UINT32 s;
s = this->size();
if ( (m_cursor >= s) && (s == 1) )
{
TreeTypePtr el;
el = this->_next();
return this->dup(el);
}
return this->_next();
}
*/
template<class ImplTraits>
typename RewriteRuleSubtreeStream<ImplTraits>::TreeTypePtr
RewriteRuleSubtreeStream<ImplTraits>::dup(const TreeTypePtr& element)
{
return this->dupTree(element);
}
template<class ImplTraits>
typename RewriteRuleSubtreeStream<ImplTraits>::TreeTypePtr
RewriteRuleSubtreeStream<ImplTraits>::dup(const TreeType* element)
{
return std::move(this->dupTree(element));
}
template<class ImplTraits>
typename RewriteRuleSubtreeStream<ImplTraits>::TreeTypePtr
RewriteRuleSubtreeStream<ImplTraits>::dupTree(const TreeTypePtr& element)
{
return std::move(m_adaptor->dupTree(element));
}
template<class ImplTraits>
typename RewriteRuleSubtreeStream<ImplTraits>::TreeTypePtr
RewriteRuleSubtreeStream<ImplTraits>::dupTree(const TreeType* element)
{
return std::move(m_adaptor->dupTree(element));
}
template<class ImplTraits>
typename RewriteRuleSubtreeStream<ImplTraits>::ElementType*
RewriteRuleSubtreeStream<ImplTraits>::toTree( ElementType* element)
{
return element;
}
template<class ImplTraits>
bool RewriteRuleSubtreeStream<ImplTraits>::hasNext()
{
return m_cursor != m_elements.end();
}
/// Number of elements available in the stream
///
template<class ImplTraits>
ANTLR_UINT32 RewriteRuleSubtreeStream<ImplTraits>::size()
{
return (ANTLR_UINT32)(m_elements.size());
}
template<class ImplTraits>
typename RewriteRuleSubtreeStream<ImplTraits>::StringType
RewriteRuleSubtreeStream<ImplTraits>::getDescription()
{
if ( m_elementDescription.empty() )
{
m_elementDescription = "<unknown source>";
}
return m_elementDescription;
}
template<class ImplTraits>
RewriteRuleSubtreeStream<ImplTraits>::~RewriteRuleSubtreeStream()
{
// Before placing the stream back in the pool, we
// need to clear any vector it has.
m_elements.clear();
}
template<class ImplTraits>
typename RewriteRuleSubtreeStream<ImplTraits>::TreeTypePtr
RewriteRuleSubtreeStream<ImplTraits>::nextNode()
{
//System.out.println("nextNode: elements="+elements+", singleElement="+((Tree)singleElement).toStringTree());
//ANTLR_UINT32 n = this->size();
if (m_dirty || (m_cursor == m_elements.end() && m_elements.size() == 1)) {
// if out of elements and size is 1, dup (at most a single node
// since this is for making root nodes).
typename ElementsType::iterator el = this->_next();
return m_adaptor->dupNode(*el);
}
typename ElementsType::iterator el = this->_next();
//while (m_adaptor->isNilNode(el) && m_adaptor->getChildCount(el) == 1)
// tree = m_adaptor->getChild(tree, 0);
TreeTypePtr& node = leftestNode(*el);
//System.out.println("_next="+((Tree)tree).toStringTree());
return m_adaptor->dupNode(node); // dup just the root (want node here)
}
template<class ImplTraits>
ANTLR_INLINE
typename RewriteRuleSubtreeStream<ImplTraits>::TreeTypePtr&
RewriteRuleSubtreeStream<ImplTraits>::leftestNode(TreeTypePtr& node) const
{
if(m_adaptor->isNilNode(node) && m_adaptor->getChildCount(node) == 1)
return leftestNode(node->getChild(0));
else
return node;
}
}
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