29 #ifndef XGBOOST_SPAN_H_ 30 #define XGBOOST_SPAN_H_ 32 #include <xgboost/logging.h> 36 #include <type_traits> 55 #if defined(_MSC_VER) && _MSC_VER < 1910 57 #define __span_noexcept 59 #pragma push_macro("constexpr") 64 #define __span_noexcept noexcept 66 #endif // defined(_MSC_VER) && _MSC_VER < 1910 74 #define KERNEL_CHECK(cond) \ 77 printf("\nKernel error:\n" \ 79 "\t%s\n\tExpecting: %s\n" \ 80 "\tBlock: [%d, %d, %d], Thread: [%d, %d, %d]\n\n", \ 81 __FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, \ 82 blockIdx.x, blockIdx.y, blockIdx.z, \ 83 threadIdx.x, threadIdx.y, threadIdx.z); \ 89 #define SPAN_CHECK KERNEL_CHECK 91 #define SPAN_CHECK CHECK // check from dmlc 92 #endif // __CUDA_ARCH__ 101 using ptrdiff_t =
typename std::conditional<std::is_same<std::ptrdiff_t, std::int64_t>::value,
105 #if defined(_MSC_VER) && _MSC_VER < 1910 106 constexpr
const std::size_t
109 constexpr std::size_t dynamic_extent = std::numeric_limits<std::size_t>::max();
110 #endif // defined(_MSC_VER) && _MSC_VER < 1910 112 enum class byte : unsigned char {};
114 template <
class ElementType, std::
size_t Extent>
119 template <
typename SpanType,
bool IsConst>
121 using ElementType =
typename SpanType::element_type;
128 using reference =
typename std::conditional<
129 IsConst,
const ElementType, ElementType>::type&;
130 using pointer =
typename std::add_pointer<reference>::type;
135 const SpanType* _span,
137 span_(_span), index_(_idx) {}
140 template <bool B, typename std::enable_if<!B && IsConst>::type* =
nullptr>
147 return *(span_->data() + index_);
155 return span_->data() + index_;
171 SPAN_CHECK(index_ != 0 && index_ <= span_->size());
195 return index_ - rhs.
index_;
210 return _lhs.span_ == _rhs.span_ && _lhs.index_ == _rhs.index_;
215 return !(_lhs == _rhs);
220 return _lhs.index_ < _rhs.index_;
225 return !(_rhs < _lhs);
235 return !(_rhs > _lhs);
254 template <std::
size_t Extent, std::
size_t Offset, std::
size_t Count>
256 std::size_t, Count != dynamic_extent ?
257 Count : (Extent != dynamic_extent ? Extent - Offset : Extent)> {};
263 template <
typename T, std::
size_t Extent>
266 Extent == dynamic_extent ?
267 Extent : sizeof(T) * Extent> {};
269 template <std::
size_t From, std::
size_t To>
271 bool, From == To || From == dynamic_extent || To == dynamic_extent> {};
273 template <
class From,
class To>
275 bool, std::is_convertible<From(*)[], To(*)[]>::value> {};
280 template <
class T, std::
size_t Extent>
287 template <
typename T>
294 template <
typename T>
301 template <
class InputIt1,
class InputIt2,
305 InputIt2 first2, InputIt2 last2) {
307 for (; first1 != last1 && first2 != last2; ++first1, ++first2) {
308 if (comp(*first1, *first2)) {
311 if (comp(*first2, *first1)) {
315 return first1 == last1 && first2 != last2;
388 template <
typename T,
389 std::size_t Extent = dynamic_extent>
409 size_(_count), data_(_ptr) {
410 SPAN_CHECK(!(Extent != dynamic_extent && _count != Extent));
415 size_(_last - _first), data_(_first) {
419 template <std::
size_t N>
423 template <
class Container,
424 class =
typename std::enable_if<
425 !std::is_const<element_type>::value &&
427 std::is_convertible<typename Container::pointer, pointer>::value &&
428 std::is_convertible<
typename Container::pointer,
429 decltype(std::declval<Container>().data())>::value>::type>
431 size_(_cont.size()), data_(_cont.data()) {
435 template <
class Container,
436 class =
typename std::enable_if<
437 std::is_const<element_type>::value &&
439 std::is_convertible<typename Container::pointer, pointer>::value &&
440 std::is_convertible<
typename Container::pointer,
441 decltype(std::declval<Container>().data())>::value>::type>
442 Span(
const Container& _cont) : size_(_cont.size()),
443 data_(_cont.data()) {
447 template <
class U, std::size_t OtherExtent,
448 class =
typename std::enable_if<
458 size_ = _other.size();
459 data_ = _other.data();
470 return {
this, size()};
478 return {
this, size()};
504 return (*
this)[size() - 1];
513 return this->operator[](_idx);
525 return size() *
sizeof(T);
533 template <std::
size_t Count>
536 return {data(), Count};
540 std::size_t _count)
const {
542 return {data(), _count};
545 template <std::
size_t Count>
548 return {data() + size() - Count, Count};
552 std::size_t _count)
const {
554 return subspan(size() - _count, _count);
561 template <std::size_t Offset,
562 std::size_t Count = dynamic_extent>
565 detail::ExtentValue<Extent, Offset, Count>::value> {
567 SPAN_CHECK(Count == dynamic_extent || (Offset + Count <= size()));
569 return {data() + Offset, Count == dynamic_extent ? size() - Offset : Count};
576 SPAN_CHECK((_count == dynamic_extent) || (_offset + _count <= size()));
578 return {data() + _offset, _count ==
579 dynamic_extent ? size() - _offset : _count};
587 template <
class T, std::
size_t X,
class U, std::
size_t Y>
594 if (*l_beg != *r_beg) {
601 template <
class T, std::
size_t X,
class U, std::
size_t Y>
606 template <
class T, std::
size_t X,
class U, std::
size_t Y>
612 template <
class T, std::
size_t X,
class U, std::
size_t Y>
617 template <
class T, std::
size_t X,
class U, std::
size_t Y>
625 template <
class T, std::
size_t X,
class U, std::
size_t Y>
630 template <
class T, std::
size_t E>
636 template <
class T, std::
size_t E>
645 #if defined(_MSC_VER) &&_MSC_VER < 1910 647 #pragma pop_macro("constexpr") 648 #undef __span_noexcept 649 #endif // _MSC_VER < 1910 651 #endif // XGBOOST_SPAN_H_ byte
Definition: span.h:112
XGBOOST_DEVICE constexpr bool operator>=(Span< T, X > l, Span< U, Y > r)
Definition: span.h:626
XGBOOST_DEVICE constexpr friend bool operator>=(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:233
XGBOOST_DEVICE Span< element_type, Count > first() const
Definition: span.h:534
XGBOOST_DEVICE constexpr index_type size() const __span_noexcept
Definition: span.h:521
XGBOOST_DEVICE Span(pointer _first, pointer _last)
Definition: span.h:414
XGBOOST_DEVICE constexpr bool empty() const __span_noexcept
Definition: span.h:528
XGBOOST_DEVICE reference operator()(index_type _idx) const
Definition: span.h:512
XGBOOST_DEVICE SpanIterator & operator--()
Definition: span.h:170
XGBOOST_DEVICE SpanIterator operator--(int)
Definition: span.h:176
XGBOOST_DEVICE constexpr SpanIterator()
Definition: span.h:132
std::size_t index_type
Definition: span.h:394
XGBOOST_DEVICE Span< element_type, dynamic_extent > subspan(index_type _offset, index_type _count=dynamic_extent) const
Definition: span.h:572
XGBOOST_DEVICE constexpr SpanIterator(const SpanIterator< SpanType, B > &other_) __span_noexcept
Definition: span.h:141
XGBOOST_DEVICE constexpr bool operator>(Span< T, X > l, Span< U, Y > r)
Definition: span.h:618
XGBOOST_DEVICE constexpr iterator end() const __span_noexcept
Definition: span.h:469
XGBOOST_DEVICE constexpr Span() __span_noexcept
Definition: span.h:406
XGBOOST_DEVICE SpanIterator operator-(difference_type n) const
Definition: span.h:198
XGBOOST_DEVICE SpanIterator & operator+=(difference_type n)
Definition: span.h:187
Span(const Container &_cont)
Definition: span.h:442
XGBOOST_DEVICE constexpr friend bool operator<=(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:223
XGBOOST_DEVICE SpanIterator operator+(difference_type n) const
Definition: span.h:182
value_type element_type
Definition: span.h:392
XGBOOST_DEVICE auto as_bytes(Span< T, E > s) __span_noexcept -> Span< const byte, detail::ExtentAsBytesValue< T, E >::value >
Definition: span.h:631
Span(Container &_cont)
Definition: span.h:430
XGBOOST_DEVICE reference operator[](difference_type n) const
Definition: span.h:149
detail::ptrdiff_t difference_type
Definition: span.h:395
typename SpanType::value_type value_type
Definition: span.h:125
XGBOOST_DEVICE reference back() const
Definition: span.h:503
XGBOOST_DEVICE constexpr Span(const Span &_other) __span_noexcept
Definition: span.h:454
value_type & reference
Definition: span.h:397
XGBOOST_DEVICE auto as_writable_bytes(Span< T, E > s) __span_noexcept -> Span< byte, detail::ExtentAsBytesValue< T, E >::value >
Definition: span.h:637
XGBOOST_DEVICE constexpr friend bool operator!=(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:213
XGBOOST_DEVICE constexpr bool operator()(const T &_x, const T &_y) const
Definition: span.h:296
std::random_access_iterator_tag iterator_category
Definition: span.h:124
XGBOOST_DEVICE Span< element_type, dynamic_extent > first(std::size_t _count) const
Definition: span.h:539
span class implementation, based on ISO++20 span<T>. The interface should be the same.
Definition: span.h:115
XGBOOST_DEVICE SpanIterator & operator++()
Definition: span.h:158
typename std::conditional< IsConst, const ElementType, ElementType >::type & reference
Definition: span.h:129
XGBOOST_DEVICE SpanIterator & operator-=(difference_type n)
Definition: span.h:203
XGBOOST_DEVICE bool LexicographicalCompare(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2)
Definition: span.h:304
XGBOOST_DEVICE constexpr friend bool operator>(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:228
typename std::remove_cv< value_type >::type value_type
Definition: span.h:393
XGBOOST_DEVICE Span< element_type, Count > last() const
Definition: span.h:546
XGBOOST_DEVICE constexpr pointer data() const __span_noexcept
Definition: span.h:516
XGBOOST_DEVICE constexpr const_reverse_iterator crend() const __span_noexcept
Definition: span.h:493
XGBOOST_DEVICE Span(pointer _ptr, index_type _count)
Definition: span.h:408
XGBOOST_DEVICE constexpr SpanIterator(const SpanType *_span, typename SpanType::index_type _idx) __span_noexcept
Definition: span.h:134
constexpr std::size_t dynamic_extent
Definition: span.h:109
XGBOOST_DEVICE constexpr reverse_iterator rbegin() const __span_noexcept
Definition: span.h:481
XGBOOST_DEVICE constexpr bool operator()(const T &_x, const T &_y) const
Definition: span.h:289
XGBOOST_DEVICE constexpr bool operator!=(Span< T, X > l, Span< U, Y > r)
Definition: span.h:602
#define XGBOOST_DEVICE
Tag function as usable by device.
Definition: base.h:84
SpanType::index_type index_
Definition: span.h:240
namespace of xgboost
Definition: base.h:102
XGBOOST_DEVICE constexpr reverse_iterator rend() const __span_noexcept
Definition: span.h:485
XGBOOST_DEVICE Span< element_type, dynamic_extent > last(std::size_t _count) const
Definition: span.h:551
typename std::conditional< std::is_same< std::ptrdiff_t, std::int64_t >::value, std::ptrdiff_t, std::int64_t >::type ptrdiff_t
Definition: span.h:102
XGBOOST_DEVICE reference front() const
Definition: span.h:499
XGBOOST_DEVICE constexpr const_reverse_iterator crbegin() const __span_noexcept
Definition: span.h:489
const SpanType * span_
Definition: span.h:239
XGBOOST_DEVICE auto subspan() const -> Span< element_type, detail::ExtentValue< Extent, Offset, Count >::value >
Definition: span.h:563
XGBOOST_DEVICE constexpr Span(element_type(&arr)[N]) __span_noexcept
Definition: span.h:420
XGBOOST_DEVICE constexpr const_iterator cbegin() const __span_noexcept
Definition: span.h:473
XGBOOST_DEVICE SpanIterator operator++(int)
Definition: span.h:164
value_type * pointer
Definition: span.h:396
#define SPAN_CHECK
Definition: span.h:91
XGBOOST_DEVICE reference operator[](index_type _idx) const
Definition: span.h:507
XGBOOST_DEVICE constexpr friend bool operator<(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:218
XGBOOST_DEVICE constexpr index_type size_bytes() const __span_noexcept
Definition: span.h:524
XGBOOST_DEVICE constexpr const_iterator cend() const __span_noexcept
Definition: span.h:477
#define __span_noexcept
span class based on ISO++20 span
Definition: span.h:64
XGBOOST_DEVICE Span & operator=(const Span &_other) __span_noexcept
Definition: span.h:457
XGBOOST_DEVICE constexpr friend bool operator==(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:208
typename std::add_pointer< reference >::type pointer
Definition: span.h:130
XGBOOST_DEVICE constexpr Span(const Span< U, OtherExtent > &_other) __span_noexcept
Definition: span.h:451
detail::ptrdiff_t difference_type
Definition: span.h:126
XGBOOST_DEVICE constexpr iterator begin() const __span_noexcept
Definition: span.h:465
XGBOOST_DEVICE difference_type operator-(SpanIterator rhs) const
Definition: span.h:193
XGBOOST_DEVICE ~Span() __span_noexcept
Definition: span.h:463
XGBOOST_DEVICE reference operator*() const
Definition: span.h:145
XGBOOST_DEVICE pointer operator->() const
Definition: span.h:153
XGBOOST_DEVICE bool operator==(Span< T, X > l, Span< U, Y > r)
Definition: span.h:588