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implemented drop_front and drop_back with test.

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This commit is contained in:
Neil Groves
2014-03-04 15:05:00 +00:00
parent 194f357eeb
commit 69759731bb
3 changed files with 219 additions and 17 deletions
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35
include/boost/range/iterator_range_core.hpp
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@ -206,12 +206,18 @@ public:
return *m_Begin;
}
void pop_front()
void drop_front()
{
BOOST_ASSERT(!empty());
++m_Begin;
}
void drop_front(difference_type n)
{
BOOST_ASSERT(n >= difference_type());
std::advance(this->m_Begin, n);
}
protected:
template<class Iterator>
void assign(Iterator first, Iterator last)
@ -256,17 +262,26 @@ protected:
}
public:
BOOST_DEDUCED_TYPENAME base_type::reference back() const
typedef BOOST_DEDUCED_TYPENAME base_type::difference_type difference_type;
typedef BOOST_DEDUCED_TYPENAME base_type::reference reference;
reference back() const
{
BOOST_ASSERT(!this->empty());
return *boost::prior(this->m_End);
}
void pop_back()
void drop_back()
{
BOOST_ASSERT(!this->empty());
--this->m_End;
}
void drop_back(difference_type n)
{
BOOST_ASSERT(n >= difference_type());
std::advance(this->m_End, -n);
}
};
template<class IteratorT>
@ -328,20 +343,6 @@ public:
return this->m_Begin[at];
}
void pop_front(difference_type n)
{
BOOST_ASSERT(n >= difference_type());
BOOST_ASSERT(size() >= static_cast<size_type>(n));
std::advance(this->m_Begin, n);
}
void pop_back(difference_type n)
{
BOOST_ASSERT(n >= difference_type());
BOOST_ASSERT(size() >= static_cast<size_type>(n));
std::advance(this->m_End, -n);
}
BOOST_DEDUCED_TYPENAME base_type::size_type size() const
{
return this->m_End - this->m_Begin;