feedc0de/boost_range
1
0
Fork 0
forked from boostorg/range
Code Pull Requests Activity

any_iterator now compiles without RTTI.

Browse Source
This commit is contained in:
Neil Groves
2014-05-07 00:13:09 +01:00
parent 5f2560f753
commit ec3c98bc25
1 changed files with 15 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
include/boost/range/detail/any_iterator_wrapper.hpp
View File

@ -19,6 +19,16 @@ namespace boost
{ {
namespace range_detail namespace range_detail
{ {
template<typename TargetT, typename SourceT>
TargetT& polymorphic_ref_downcast(SourceT& source)
{
#ifdef BOOST_NO_RTTI
return static_cast<TargetT&>(source);
#else
return *boost::polymorphic_downcast<TargetT*>(&source);
#endif
}
template<class Reference, class T> template<class Reference, class T>
Reference dereference_cast(T& x) Reference dereference_cast(T& x)
{ {
@ -192,7 +202,7 @@ namespace boost
virtual bool equal(const any_single_pass_iterator_interface<Reference, Buffer>& other) const virtual bool equal(const any_single_pass_iterator_interface<Reference, Buffer>& other) const
{ {
return m_it == boost::polymorphic_downcast<const any_single_pass_iterator_wrapper*>(&other)->m_it; return m_it == range_detail::polymorphic_ref_downcast<const any_single_pass_iterator_wrapper>(other).m_it;
} }
virtual reference dereference() const virtual reference dereference() const
@ -284,7 +294,7 @@ namespace boost
virtual bool equal(const any_single_pass_iterator_interface<Reference, Buffer>& other) const virtual bool equal(const any_single_pass_iterator_interface<Reference, Buffer>& other) const
{ {
return m_it == boost::polymorphic_downcast<const any_forward_iterator_wrapper*>(&other)->m_it; return m_it == range_detail::polymorphic_ref_downcast<const any_forward_iterator_wrapper>(other).m_it;
} }
virtual reference dereference() const virtual reference dereference() const
@ -381,7 +391,7 @@ namespace boost
virtual bool equal(const any_single_pass_iterator_interface<Reference, Buffer>& other) const virtual bool equal(const any_single_pass_iterator_interface<Reference, Buffer>& other) const
{ {
return m_it == boost::polymorphic_downcast<const any_bidirectional_iterator_wrapper*>(&other)->m_it; return m_it == range_detail::polymorphic_ref_downcast<const any_bidirectional_iterator_wrapper>(other).m_it;
} }
virtual reference dereference() const virtual reference dereference() const
@ -482,7 +492,7 @@ namespace boost
virtual bool equal(const any_single_pass_iterator_interface<Reference, Buffer>& other) const virtual bool equal(const any_single_pass_iterator_interface<Reference, Buffer>& other) const
{ {
return m_it == boost::polymorphic_downcast<const any_random_access_iterator_wrapper*>(&other)->m_it; return m_it == range_detail::polymorphic_ref_downcast<const any_random_access_iterator_wrapper>(other).m_it;
} }
virtual void decrement() virtual void decrement()
@ -502,7 +512,7 @@ namespace boost
virtual Difference distance_to(const any_random_access_iterator_interface<Reference, Difference, Buffer>& other) const virtual Difference distance_to(const any_random_access_iterator_interface<Reference, Difference, Buffer>& other) const
{ {
return boost::polymorphic_downcast<const any_random_access_iterator_wrapper*>(&other)->m_it - m_it; return range_detail::polymorphic_ref_downcast<const any_random_access_iterator_wrapper>(other).m_it - m_it;
} }
private: private: