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Ranges: Fix copiability of some range view iterators

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Some iterators were refering to to their view with a const ref, this
was making them non-copiable. Change those const ref into const pointers
in order to fix that.
This commit is contained in:
Maxime Coste 2018-02-28 15:15:51 +11:00
parent edee85a847
commit a6fd70c456
1 changed files with 6 additions and 6 deletions
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12
src/ranges.hh
View File

@ -64,7 +64,7 @@ struct FilterView
typename std::iterator_traits<RangeIt>::value_type>
{
Iterator(const FilterView& view, RangeIt it, RangeIt end)
: m_it{std::move(it)}, m_end{std::move(end)}, m_view{view}
: m_it{std::move(it)}, m_end{std::move(end)}, m_view{&view}
{
do_filter();
}
@ -88,13 +88,13 @@ struct FilterView
private:
void do_filter()
{
while (m_it != m_end and not m_view.m_filter(*m_it))
while (m_it != m_end and not m_view->m_filter(*m_it))
++m_it;
}
RangeIt m_it;
RangeIt m_end;
const FilterView& m_view;
const FilterView* m_view;
};
Iterator begin() const { return {*this, std::begin(m_range), std::end(m_range)}; }
@ -122,9 +122,9 @@ struct TransformView
struct Iterator : std::iterator<std::forward_iterator_tag, std::remove_reference_t<ResType>>
{
Iterator(const TransformView& view, RangeIt it)
: m_it{std::move(it)}, m_view{view} {}
: m_it{std::move(it)}, m_view{&view} {}
decltype(auto) operator*() { return m_view.m_transform(*m_it); }
decltype(auto) operator*() { return m_view->m_transform(*m_it); }
Iterator& operator++() { ++m_it; return *this; }
Iterator operator++(int) { auto copy = *this; ++m_it; return copy; }
@ -142,7 +142,7 @@ struct TransformView
private:
RangeIt m_it;
const TransformView& m_view;
const TransformView* m_view;
};
Iterator begin() const { return {*this, std::begin(m_range)}; }