boost_mirror/iterator
1
0
Fork 0
mirror of https://github.com/boostorg/iterator.git synced 2025-05-11 13:33:56 +00:00
Code Issues Packages Projects Releases Wiki Activity

Made sure that iterator_facade's nested `::pointer` type is always

Browse Source 
the same as what's returned from operator->.  For input iterators,
that wasn't always the case (see operator_arrow_proxy).

Fixes #1019.


[SVN r57989]
This commit is contained in:
Dave Abrahams 2009-11-28 05:12:29 +00:00
parent d11c7a3ec4
commit 4c60e26bf8
2 changed files with 18 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
include/boost/iterator/iterator_facade.hpp
View File

@ -105,6 +105,7 @@ namespace boost
typedef typename remove_const<ValueParam>::type value_type;
// Not the real associated pointer type
typedef typename mpl::eval_if<
boost::detail::iterator_writability_disabled<ValueParam,Reference>
, add_pointer<const value_type>
@ -617,6 +618,12 @@ namespace boost
Value, CategoryOrTraversal, Reference, Difference
> associated_types;
typedef boost::detail::operator_arrow_result<
typename associated_types::value_type
, Reference
, typename associated_types::pointer
> pointer_;
protected:
// For use by derived classes
typedef iterator_facade<Derived,Value,CategoryOrTraversal,Reference,Difference> iterator_facade_;
@ -626,7 +633,9 @@ namespace boost
typedef typename associated_types::value_type value_type;
typedef Reference reference;
typedef Difference difference_type;
typedef typename associated_types::pointer pointer;
typedef typename pointer_::type pointer;
typedef typename associated_types::iterator_category iterator_category;
reference operator*() const
@ -634,18 +643,9 @@ namespace boost
return iterator_core_access::dereference(this->derived());
}
typename boost::detail::operator_arrow_result<
value_type
, reference
, pointer
>::type
operator->() const
pointer operator->() const
{
return boost::detail::operator_arrow_result<
value_type
, reference
, pointer
>::make(*this->derived());
return pointer_::make(*this->derived());
}
typename boost::detail::operator_brackets_result<Derived,Value,reference>::type

6
test/iterator_facade.cpp Executable file → Normal file
View File

@ -87,6 +87,10 @@ struct input_iter
}
};
template <class T, class U>
void same_type(U const&)
{ BOOST_MPL_ASSERT((boost::is_same<T,U>)); }
int main()
{
int state = 0;
@ -101,6 +105,8 @@ int main()
input_iter p;
(*p).mutator();
p->mutator();
same_type<input_iter::pointer>(p.operator->());
return boost::report_errors();
}