mirror of
https://github.com/microsoft/GSL.git
synced 2024-11-03 17:56:43 -05:00
Removed arrow_proxy class, fixes bugs in reverse bounds_iterator
This commit is contained in:
Anna Gringauze
parent
c973e82dff
commit
a4654a46b5
@ -74,25 +74,6 @@ namespace details
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{
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static const SizeType max_value = std::is_signed<SizeType>::value ? static_cast<typename std::make_unsigned<SizeType>::type>(-1) / 2 : static_cast<SizeType>(-1);
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};
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template <typename T>
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class arrow_proxy
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{
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public:
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explicit arrow_proxy(T t)
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: val(t)
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{}
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const T operator*() const noexcept
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{
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return val;
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}
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const T* operator->() const noexcept
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{
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return &val;
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}
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private:
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T val;
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};
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}
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template <size_t Rank, typename ValueType = size_t>
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@ -730,8 +711,9 @@ public:
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using size_type = SizeType;
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using index_type = index<rank, size_type>;
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using iterator = bounds_iterator<index_type>;
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using const_iterator = bounds_iterator<index_type>;
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using const_index_type = std::add_const_t<index_type>;
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using iterator = bounds_iterator<const_index_type>;
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using const_iterator = bounds_iterator<const_index_type>;
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using difference_type = ptrdiff_t;
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using sliced_type = static_bounds<SizeType, RestRanges...>;
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using mapping_type = contiguous_mapping_tag;
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@ -822,7 +804,7 @@ public:
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constexpr const_iterator begin() const noexcept
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{
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return const_iterator(*this);
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return const_iterator(*this, index_type{});
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}
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constexpr const_iterator end() const noexcept
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@ -845,8 +827,9 @@ public:
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using difference_type = SizeType;
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using value_type = SizeType;
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using index_type = index<rank, size_type>;
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using iterator = bounds_iterator<index_type>;
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using const_iterator = bounds_iterator<index_type>;
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using const_index_type = std::add_const_t<index_type>;
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using iterator = bounds_iterator<const_index_type>;
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using const_iterator = bounds_iterator<const_index_type>;
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static const int dynamic_rank = rank;
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static const size_t static_size = dynamic_range;
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using sliced_type = std::conditional_t<rank != 0, strided_bounds<rank - 1>, void>;
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@ -920,11 +903,11 @@ public:
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{
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return m_extents;
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}
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const_iterator begin() const noexcept
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constexpr const_iterator begin() const noexcept
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{
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return const_iterator{ *this };
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return const_iterator{ *this, index_type{} };
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}
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const_iterator end() const noexcept
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constexpr const_iterator end() const noexcept
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{
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return const_iterator{ *this, index_bounds() };
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}
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@ -941,15 +924,11 @@ template <size_t Rank, typename SizeType>
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struct is_bounds<strided_bounds<Rank, SizeType>> : std::integral_constant<bool, true> {};
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template <typename IndexType>
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class bounds_iterator
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: public std::iterator<std::random_access_iterator_tag,
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IndexType,
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ptrdiff_t,
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const details::arrow_proxy<IndexType>,
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const IndexType>
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class bounds_iterator: public std::iterator<std::random_access_iterator_tag, IndexType>
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{
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private:
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using Base = std::iterator <std::random_access_iterator_tag, IndexType, ptrdiff_t, const details::arrow_proxy<IndexType>, const IndexType>;
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using Base = std::iterator <std::random_access_iterator_tag, IndexType>;
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public:
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static const size_t rank = IndexType::rank;
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using typename Base::reference;
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@ -959,79 +938,88 @@ public:
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using index_type = value_type;
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using index_size_type = typename IndexType::value_type;
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template <typename Bounds>
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explicit bounds_iterator(const Bounds& bnd, value_type curr = value_type{}) noexcept
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: boundary(bnd.index_bounds())
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, curr(std::move(curr))
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explicit bounds_iterator(const Bounds& bnd, value_type curr) noexcept
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: boundary(bnd.index_bounds()), curr(std::move(curr))
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{
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static_assert(is_bounds<Bounds>::value, "Bounds type must be provided");
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}
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reference operator*() const noexcept
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constexpr reference operator*() const noexcept
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{
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return curr;
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}
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pointer operator->() const noexcept
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constexpr pointer operator->() const noexcept
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{
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return details::arrow_proxy<value_type>{ curr };
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return &curr;
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}
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bounds_iterator& operator++() noexcept
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constexpr bounds_iterator& operator++() noexcept
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{
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for (size_t i = rank; i-- > 0;)
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{
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if (++curr[i] < boundary[i])
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if (curr[i] < boundary[i] - 1)
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{
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curr[i]++;
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return *this;
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}
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else
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{
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curr[i] = 0;
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}
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curr[i] = 0;
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}
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// If we're here we've wrapped over - set to past-the-end.
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for (size_t i = 0; i < rank; ++i)
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{
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curr[i] = boundary[i];
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}
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curr = boundary;
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return *this;
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}
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bounds_iterator operator++(int) noexcept
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constexpr bounds_iterator operator++(int) noexcept
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{
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auto ret = *this;
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++(*this);
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return ret;
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}
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bounds_iterator& operator--() noexcept
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constexpr bounds_iterator& operator--() noexcept
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{
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for (size_t i = rank; i-- > 0;)
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if (!less(curr, boundary))
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{
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if (curr[i]-- > 0)
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{
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return *this;
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}
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else
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// if at the past-the-end, set to last element
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for (size_t i = 0; i < rank; ++i)
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{
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curr[i] = boundary[i] - 1;
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}
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return *this;
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}
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for (size_t i = rank; i-- > 0;)
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{
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if (curr[i] >= 1)
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{
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curr[i]--;
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return *this;
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}
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curr[i] = boundary[i] - 1;
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}
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// If we're here the preconditions were violated
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// "pre: there exists s such that r == ++s"
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fail_fast_assert(false);
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return *this;
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}
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bounds_iterator operator--(int) noexcept
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constexpr bounds_iterator operator--(int) noexcept
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{
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auto ret = *this;
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--(*this);
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return ret;
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}
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bounds_iterator operator+(difference_type n) const noexcept
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constexpr bounds_iterator operator+(difference_type n) const noexcept
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{
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bounds_iterator ret{ *this };
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return ret += n;
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}
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bounds_iterator& operator+=(difference_type n) noexcept
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constexpr bounds_iterator& operator+=(difference_type n) noexcept
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{
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auto linear_idx = linearize(curr) + n;
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value_type stride;
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std::remove_const_t<value_type> stride;
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stride[rank - 1] = 1;
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for (size_t i = rank - 1; i-- > 0;)
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{
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@ -1042,76 +1030,84 @@ public:
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curr[i] = linear_idx / stride[i];
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linear_idx = linear_idx % stride[i];
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}
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fail_fast_assert(!less(curr, index_type{}) && !less(boundary, curr), "index is out of bounds of the array");
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return *this;
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}
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bounds_iterator operator-(difference_type n) const noexcept
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constexpr bounds_iterator operator-(difference_type n) const noexcept
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{
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bounds_iterator ret{ *this };
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return ret -= n;
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}
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bounds_iterator& operator-=(difference_type n) noexcept
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constexpr bounds_iterator& operator-=(difference_type n) noexcept
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{
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return *this += -n;
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}
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difference_type operator-(const bounds_iterator& rhs) const noexcept
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constexpr difference_type operator-(const bounds_iterator& rhs) const noexcept
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{
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return linearize(curr) - linearize(rhs.curr);
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}
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reference operator[](difference_type n) const noexcept
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constexpr reference operator[](difference_type n) const noexcept
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{
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return *(*this + n);
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}
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bool operator==(const bounds_iterator& rhs) const noexcept
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constexpr bool operator==(const bounds_iterator& rhs) const noexcept
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{
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return curr == rhs.curr;
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}
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bool operator!=(const bounds_iterator& rhs) const noexcept
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constexpr bool operator!=(const bounds_iterator& rhs) const noexcept
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{
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return !(*this == rhs);
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}
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bool operator<(const bounds_iterator& rhs) const noexcept
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constexpr bool operator<(const bounds_iterator& rhs) const noexcept
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{
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for (size_t i = 0; i < rank; ++i)
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{
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if (curr[i] < rhs.curr[i])
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return true;
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}
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return false;
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return less(curr, rhs.curr);
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}
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bool operator<=(const bounds_iterator& rhs) const noexcept
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constexpr bool operator<=(const bounds_iterator& rhs) const noexcept
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{
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return !(rhs < *this);
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}
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bool operator>(const bounds_iterator& rhs) const noexcept
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constexpr bool operator>(const bounds_iterator& rhs) const noexcept
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{
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return rhs < *this;
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}
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bool operator>=(const bounds_iterator& rhs) const noexcept
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constexpr bool operator>=(const bounds_iterator& rhs) const noexcept
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{
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return !(rhs > *this);
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}
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void swap(bounds_iterator& rhs) noexcept
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{
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std::swap(boundary, rhs.boundary);
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std::swap(curr, rhs.curr);
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}
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private:
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index_size_type linearize(const value_type& idx) const noexcept
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constexpr bool less(index_type& one, index_type& other) const noexcept
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{
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for (size_t i = 0; i < rank; ++i)
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{
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if (one[i] < other[i])
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return true;
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}
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return false;
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}
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constexpr index_size_type linearize(const value_type& idx) const noexcept
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{
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// TODO: Smarter impl.
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// Check if past-the-end
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bool pte = true;
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for (size_t i = 0; i < rank; ++i)
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{
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if (idx[i] != boundary[i])
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{
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pte = false;
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break;
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}
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}
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index_size_type multiplier = 1;
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index_size_type res = 0;
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if (pte)
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if (!less(idx, boundary))
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{
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res = 1;
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for (size_t i = rank; i-- > 0;)
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@ -1130,19 +1126,15 @@ private:
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}
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return res;
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}
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value_type boundary;
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value_type curr;
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std::remove_const_t<value_type> curr;
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};
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template <typename SizeType>
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class bounds_iterator<index<1, SizeType>>
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: public std::iterator<std::random_access_iterator_tag,
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index<1, SizeType>,
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ptrdiff_t,
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const details::arrow_proxy<index<1, SizeType>>,
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const index<1, SizeType>>
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class bounds_iterator<index<1, SizeType>> : public std::iterator<std::random_access_iterator_tag, index<1, SizeType>>
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{
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using Base = std::iterator<std::random_access_iterator_tag, index<1, SizeType>, ptrdiff_t, const details::arrow_proxy<index<1, SizeType>>, const index<1, SizeType>>;
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using Base = std::iterator<std::random_access_iterator_tag, index<1, SizeType>>;
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public:
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using typename Base::reference;
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@ -1153,96 +1145,116 @@ public:
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using index_size_type = typename index_type::value_type;
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template <typename Bounds>
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explicit bounds_iterator(const Bounds &, value_type curr = value_type{}) noexcept
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: curr( std::move(curr) )
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constexpr explicit bounds_iterator(const Bounds&, value_type curr) noexcept
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: curr(std::move(curr))
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{}
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reference operator*() const noexcept
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constexpr reference operator*() const noexcept
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{
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return curr;
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}
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pointer operator->() const noexcept
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constexpr pointer operator->() const noexcept
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{
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return details::arrow_proxy<value_type>{ curr };
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&curr;
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}
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bounds_iterator& operator++() noexcept
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constexpr bounds_iterator& operator++() noexcept
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{
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++curr;
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return *this;
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}
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bounds_iterator operator++(int) noexcept
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constexpr bounds_iterator operator++(int) noexcept
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{
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auto ret = *this;
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++(*this);
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return ret;
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}
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bounds_iterator& operator--() noexcept
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constexpr bounds_iterator& operator--() noexcept
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{
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curr--;
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return *this;
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}
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bounds_iterator operator--(int) noexcept
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constexpr bounds_iterator operator--(int) noexcept
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{
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auto ret = *this;
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--(*this);
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return ret;
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}
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bounds_iterator operator+(difference_type n) const noexcept
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constexpr bounds_iterator operator+(difference_type n) const noexcept
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{
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bounds_iterator ret{ *this };
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return ret += n;
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}
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bounds_iterator& operator+=(difference_type n) noexcept
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constexpr bounds_iterator& operator+=(difference_type n) noexcept
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{
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curr += n;
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return *this;
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}
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bounds_iterator operator-(difference_type n) const noexcept
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constexpr bounds_iterator operator-(difference_type n) const noexcept
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{
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bounds_iterator ret{ *this };
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return ret -= n;
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}
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bounds_iterator& operator-=(difference_type n) noexcept
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constexpr bounds_iterator& operator-=(difference_type n) noexcept
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{
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return *this += -n;
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}
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difference_type operator-(const bounds_iterator& rhs) const noexcept
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constexpr difference_type operator-(const bounds_iterator& rhs) const noexcept
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{
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return curr[0] - rhs.curr[0];
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}
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reference operator[](difference_type n) const noexcept
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constexpr reference operator[](difference_type n) const noexcept
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{
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return curr + n;
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}
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bool operator==(const bounds_iterator& rhs) const noexcept
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constexpr bool operator==(const bounds_iterator& rhs) const noexcept
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{
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return curr == rhs.curr;
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}
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bool operator!=(const bounds_iterator& rhs) const noexcept
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constexpr bool operator!=(const bounds_iterator& rhs) const noexcept
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{
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return !(*this == rhs);
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}
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bool operator<(const bounds_iterator& rhs) const noexcept
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constexpr bool operator<(const bounds_iterator& rhs) const noexcept
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{
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return curr[0] < rhs.curr[0];
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}
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bool operator<=(const bounds_iterator& rhs) const noexcept
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constexpr bool operator<=(const bounds_iterator& rhs) const noexcept
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{
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return !(rhs < *this);
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}
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bool operator>(const bounds_iterator& rhs) const noexcept
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constexpr bool operator>(const bounds_iterator& rhs) const noexcept
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{
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return rhs < *this;
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}
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bool operator>=(const bounds_iterator& rhs) const noexcept
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constexpr bool operator>=(const bounds_iterator& rhs) const noexcept
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{
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return !(rhs > *this);
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}
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void swap(bounds_iterator& rhs) noexcept
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constexpr void swap(bounds_iterator& rhs) noexcept
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{
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std::swap(curr, rhs.curr);
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}
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private:
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value_type curr;
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std::remove_const_t<value_type> curr;
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};
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template <typename IndexType>
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@ -1304,10 +1316,11 @@ public:
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using size_type = typename bounds_type::size_type;
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using index_type = typename bounds_type::index_type;
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using value_type = ValueType;
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using const_value_type = std::add_const_t<value_type>;
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using pointer = ValueType*;
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using reference = ValueType&;
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using iterator = std::conditional_t<std::is_same<typename BoundsType::mapping_type, contiguous_mapping_tag>::value, contiguous_array_view_iterator<basic_array_view>, general_array_view_iterator<basic_array_view>>;
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using const_iterator = std::conditional_t<std::is_same<typename BoundsType::mapping_type, contiguous_mapping_tag>::value, contiguous_array_view_iterator<basic_array_view<const ValueType, BoundsType>>, general_array_view_iterator<basic_array_view<const ValueType, BoundsType>>>;
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using const_iterator = std::conditional_t<std::is_same<typename BoundsType::mapping_type, contiguous_mapping_tag>::value, contiguous_array_view_iterator<basic_array_view<const_value_type, BoundsType>>, general_array_view_iterator<basic_array_view<const_value_type, BoundsType>>>;
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using reverse_iterator = std::reverse_iterator<iterator>;
|
||||
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
|
||||
using sliced_type = std::conditional_t<rank == 1, value_type, basic_array_view<value_type, typename BoundsType::sliced_type>>;
|
||||
@ -1360,7 +1373,7 @@ public:
|
||||
}
|
||||
constexpr iterator end() const
|
||||
{
|
||||
return iterator {this};
|
||||
return iterator {this, false};
|
||||
}
|
||||
constexpr const_iterator cbegin() const
|
||||
{
|
||||
@ -1368,7 +1381,7 @@ public:
|
||||
}
|
||||
constexpr const_iterator cend() const
|
||||
{
|
||||
return const_iterator {reinterpret_cast<const basic_array_view<const value_type, bounds_type> *>(this)};
|
||||
return const_iterator {reinterpret_cast<const basic_array_view<const value_type, bounds_type> *>(this), false};
|
||||
}
|
||||
|
||||
constexpr reverse_iterator rbegin() const
|
||||
@ -1999,8 +2012,8 @@ private:
|
||||
{
|
||||
fail_fast_assert(m_pdata >= m_validator->m_pdata && m_pdata < m_validator->m_pdata + m_validator->size(), "iterator is out of range of the array");
|
||||
}
|
||||
contiguous_array_view_iterator (const ArrayView *container, bool isbegin = false) :
|
||||
m_pdata(isbegin ? container->m_pdata : container->m_pdata + container->size()), m_validator(container) { }
|
||||
contiguous_array_view_iterator (const ArrayView *container, bool isbegin) :
|
||||
m_pdata(isbegin ? container->m_pdata : container->m_pdata + container->size()), m_validator(container) {}
|
||||
public:
|
||||
reference operator*() const noexcept
|
||||
{
|
||||
@ -2115,16 +2128,16 @@ private:
|
||||
friend class basic_array_view;
|
||||
const ArrayView * m_container;
|
||||
typename ArrayView::bounds_type::iterator m_itr;
|
||||
general_array_view_iterator(const ArrayView *container, bool isbegin = false) :
|
||||
general_array_view_iterator(const ArrayView *container, bool isbegin) :
|
||||
m_container(container), m_itr(isbegin ? m_container->bounds().begin() : m_container->bounds().end())
|
||||
{
|
||||
}
|
||||
public:
|
||||
reference operator*() const noexcept
|
||||
reference operator*() noexcept
|
||||
{
|
||||
return (*m_container)[*m_itr];
|
||||
}
|
||||
pointer operator->() const noexcept
|
||||
pointer operator->() noexcept
|
||||
{
|
||||
return &(*m_container)[*m_itr];
|
||||
}
|
||||
|
||||
@ -925,11 +925,35 @@ SUITE(array_view_tests)
|
||||
}
|
||||
}
|
||||
|
||||
size_t idx = 0;
|
||||
for (auto num : section)
|
||||
size_t check_sum = 0;
|
||||
for (size_t i = 0; i < length; ++i)
|
||||
{
|
||||
CHECK(num == av[idx][1]);
|
||||
idx++;
|
||||
check_sum += av[i][1];
|
||||
}
|
||||
|
||||
{
|
||||
size_t idx = 0;
|
||||
size_t sum = 0;
|
||||
for (auto num : section)
|
||||
{
|
||||
CHECK(num == av[idx][1]);
|
||||
sum += num;
|
||||
idx++;
|
||||
}
|
||||
|
||||
CHECK(sum == check_sum);
|
||||
}
|
||||
{
|
||||
size_t idx = length - 1;
|
||||
size_t sum = 0;
|
||||
for (auto iter = section.rbegin(); iter != section.rend(); ++iter)
|
||||
{
|
||||
CHECK(*iter == av[idx][1]);
|
||||
sum += *iter;
|
||||
idx--;
|
||||
}
|
||||
|
||||
CHECK(sum == check_sum);
|
||||
}
|
||||
}
|
||||
|
||||
@ -1688,7 +1712,7 @@ SUITE(array_view_tests)
|
||||
CHECK_THROW(f(), fail_fast);
|
||||
}
|
||||
|
||||
TEST(AsWriteableBytes)
|
||||
TEST(AsWriteableBytes)
|
||||
{
|
||||
int a[] = { 1, 2, 3, 4 };
|
||||
|
||||
@ -1714,7 +1738,36 @@ SUITE(array_view_tests)
|
||||
CHECK(wav.data() == (byte*)&a[0]);
|
||||
CHECK(wav.length() == sizeof(a));
|
||||
}
|
||||
}
|
||||
|
||||
TEST(NonConstIterator)
|
||||
{
|
||||
int a[] = { 1, 2, 3, 4 };
|
||||
|
||||
{
|
||||
array_view<int, dynamic_range> av = a;
|
||||
auto wav = av.as_writeable_bytes();
|
||||
for (auto& b : wav)
|
||||
{
|
||||
b = byte(0);
|
||||
}
|
||||
for (size_t i = 0; i < 4; ++i)
|
||||
{
|
||||
CHECK(a[i] == 0);
|
||||
}
|
||||
}
|
||||
|
||||
{
|
||||
array_view<int, dynamic_range> av = a;
|
||||
for (auto& n : av)
|
||||
{
|
||||
n = 1;
|
||||
}
|
||||
for (size_t i = 0; i < 4; ++i)
|
||||
{
|
||||
CHECK(a[i] == 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
TEST(ArrayViewComparison)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user