29 #ifndef XGBOOST_SPAN_H_
30 #define XGBOOST_SPAN_H_
38 #include <type_traits>
41 #if defined(__CUDACC__)
42 #include <cuda_runtime.h>
62 #if defined(_MSC_VER) && _MSC_VER < 1910
64 #define __span_noexcept
66 #pragma push_macro("constexpr")
71 #define __span_noexcept noexcept
77 #if defined(__CUDA_ARCH__)
83 #define CUDA_KERNEL_CHECK(cond) \
85 if (XGBOOST_EXPECT(!(cond), false)) { \
92 #define __ASSERT_STR_HELPER(x) #x
94 #define CUDA_KERNEL_CHECK(cond) \
95 (XGBOOST_EXPECT((cond), true) \
96 ? static_cast<void>(0) \
97 : __assert_fail(__ASSERT_STR_HELPER((cond)), __FILE__, __LINE__, __PRETTY_FUNCTION__))
101 #define KERNEL_CHECK CUDA_KERNEL_CHECK
103 #define SPAN_CHECK KERNEL_CHECK
107 #if defined(XGBOOST_STRICT_R_MODE) && XGBOOST_STRICT_R_MODE == 1
109 #define KERNEL_CHECK(cond)
111 #define SPAN_CHECK(cond) KERNEL_CHECK(cond)
115 #define KERNEL_CHECK(cond) (XGBOOST_EXPECT((cond), true) ? static_cast<void>(0) : std::terminate())
117 #define SPAN_CHECK(cond) KERNEL_CHECK(cond)
123 #define SPAN_LT(lhs, rhs) SPAN_CHECK((lhs) < (rhs))
133 std::is_same<std::ptrdiff_t, std::int64_t>::value,
137 #if defined(_MSC_VER) && _MSC_VER < 1910
138 constexpr
const std::size_t
144 enum class byte : unsigned char {};
146 template <
class ElementType, std::
size_t Extent>
151 template <
typename SpanType,
bool IsConst>
153 using ElementType =
typename SpanType::element_type;
161 IsConst,
const ElementType, ElementType>::type&;
162 using pointer =
typename std::add_pointer<reference>::type;
167 const SpanType* _span,
172 template <bool B, typename std::enable_if<!B && IsConst>::type* =
nullptr>
242 return _lhs.span_ == _rhs.span_ && _lhs.index_ == _rhs.index_;
247 return !(_lhs == _rhs);
252 return _lhs.index_ < _rhs.index_;
257 return !(_rhs < _lhs);
267 return !(_rhs > _lhs);
272 typename SpanType::index_type
index_ { 0 };
286 template <std::
size_t Extent, std::
size_t Offset, std::
size_t Count>
288 std::size_t, Count != dynamic_extent ?
289 Count : (Extent != dynamic_extent ? Extent - Offset : Extent)> {};
295 template <
typename T, std::
size_t Extent>
298 Extent == dynamic_extent ?
299 Extent : sizeof(T) * Extent> {};
301 template <std::
size_t From, std::
size_t To>
303 bool, From == To || From == dynamic_extent || To == dynamic_extent> {};
305 template <
class From,
class To>
307 bool, std::is_convertible<From(*)[], To(*)[]>::value> {};
312 template <
class T, std::
size_t Extent>
319 template <
typename T>
326 template <
typename T>
333 template <
class InputIt1,
class InputIt2,
337 InputIt2 first2, InputIt2 last2) {
339 for (; first1 != last1 && first2 != last2; ++first1, ++first2) {
340 if (comp(*first1, *first2)) {
343 if (comp(*first2, *first1)) {
347 return first1 == last1 && first2 != last2;
420 template <
typename T,
440 size_(_count), data_(_ptr) {
446 size_(_last - _first), data_(_first) {
450 template <std::
size_t N>
454 template <
class Container,
455 class =
typename std::enable_if<
456 !std::is_const<element_type>::value &&
458 std::is_convertible<typename Container::pointer, pointer>::value &&
459 std::is_convertible<
typename Container::pointer,
460 decltype(std::declval<Container>().
data())>::value>::type>
462 size_(_cont.
size()), data_(_cont.
data()) {
466 template <
class Container,
467 class =
typename std::enable_if<
468 std::is_const<element_type>::value &&
470 std::is_convertible<typename Container::pointer, pointer>::value &&
471 std::is_convertible<
typename Container::pointer,
472 decltype(std::declval<Container>().
data())>::value>::type>
473 Span(
const Container& _cont) : size_(_cont.
size()),
474 data_(_cont.
data()) {
478 template <
class U, std::size_t OtherExtent,
479 class =
typename std::enable_if<
489 size_ = _other.size();
490 data_ = _other.data();
501 return {
this,
size()};
509 return {
this,
size()};
535 return (*
this)[
size() - 1];
556 return size() *
sizeof(T);
564 template <std::
size_t Count>
567 return {
data(), Count};
571 std::size_t _count)
const {
573 return {
data(), _count};
576 template <std::
size_t Count>
579 return {
data() +
size() - Count, Count};
583 std::size_t _count)
const {
592 template <std::size_t
Offset,
596 detail::ExtentValue<Extent,
Offset, Count>::value> {
606 (_offset <=
size()) : (_offset + _count <=
size()));
607 return {
data() + _offset, _count ==
616 template <
class T, std::
size_t X,
class U, std::
size_t Y>
623 if (*l_beg != *r_beg) {
630 template <
class T, std::
size_t X,
class U, std::
size_t Y>
635 template <
class T, std::
size_t X,
class U, std::
size_t Y>
641 template <
class T, std::
size_t X,
class U, std::
size_t Y>
646 template <
class T, std::
size_t X,
class U, std::
size_t Y>
654 template <
class T, std::
size_t X,
class U, std::
size_t Y>
659 template <
class T, std::
size_t E>
662 return {
reinterpret_cast<const byte*
>(s.data()), s.
size_bytes()};
665 template <
class T, std::
size_t E>
668 return {
reinterpret_cast<byte*
>(s.data()), s.
size_bytes()};
674 template <
typename It>
677 using value_type =
typename std::iterator_traits<It>::value_type;
689 : it_{span.
data()}, size_{span.
size()} {}
711 #if defined(_MSC_VER) &&_MSC_VER < 1910
713 #pragma pop_macro("constexpr")
714 #undef __span_noexcept
Defines configuration macros and basic types for xgboost.
#define XGBOOST_DEVICE
Tag function as usable by device.
Definition: base.h:62
A simple custom Span type that uses general iterator instead of pointer.
Definition: span.h:675
It iterator
Definition: span.h:679
constexpr XGBOOST_DEVICE iterator begin() const noexcept
Definition: span.h:701
std::size_t index_type
Definition: span.h:678
XGBOOST_DEVICE IterSpan(common::Span< It, dynamic_extent > span)
Definition: span.h:688
constexpr XGBOOST_DEVICE iterator end() const noexcept
Definition: span.h:704
XGBOOST_DEVICE IterSpan(It it, index_type size)
Definition: span.h:687
XGBOOST_DEVICE bool empty() const noexcept
Definition: span.h:694
XGBOOST_DEVICE IterSpan< It > subspan(index_type _offset, index_type _count=dynamic_extent) const
Definition: span.h:696
XGBOOST_DEVICE index_type size() const noexcept
Definition: span.h:691
XGBOOST_DEVICE It data() const noexcept
Definition: span.h:695
typename std::iterator_traits< It >::value_type value_type
Definition: span.h:677
span class implementation, based on ISO++20 span<T>. The interface should be the same.
Definition: span.h:422
T & reference
Definition: span.h:429
XGBOOST_DEVICE Span(pointer _first, pointer _last)
Definition: span.h:445
T * pointer
Definition: span.h:428
detail::ptrdiff_t difference_type
Definition: span.h:427
XGBOOST_DEVICE reference operator()(index_type _idx) const
Definition: span.h:543
XGBOOST_DEVICE reference front() const
Definition: span.h:530
constexpr XGBOOST_DEVICE const_iterator cbegin() const __span_noexcept
Definition: span.h:504
constexpr XGBOOST_DEVICE iterator begin() const __span_noexcept
Definition: span.h:496
constexpr XGBOOST_DEVICE pointer data() const __span_noexcept
Definition: span.h:547
std::size_t index_type
Definition: span.h:426
XGBOOST_DEVICE reference back() const
Definition: span.h:534
XGBOOST_DEVICE auto subspan() const -> Span< element_type, detail::ExtentValue< Extent, Offset, Count >::value >
Definition: span.h:594
constexpr XGBOOST_DEVICE index_type size() const __span_noexcept
Definition: span.h:552
XGBOOST_DEVICE Span< element_type, Count > last() const
Definition: span.h:577
Span(Container &_cont)
Definition: span.h:461
XGBOOST_DEVICE Span< element_type, Count > first() const
Definition: span.h:565
constexpr XGBOOST_DEVICE Span(const Span &_other) __span_noexcept
Definition: span.h:485
constexpr XGBOOST_DEVICE bool empty() const __span_noexcept
Definition: span.h:559
constexpr XGBOOST_DEVICE index_type size_bytes() const __span_noexcept
Definition: span.h:555
constexpr XGBOOST_DEVICE Span(element_type(&arr)[N]) __span_noexcept
Definition: span.h:451
constexpr reverse_iterator rbegin() const __span_noexcept
Definition: span.h:512
T element_type
Definition: span.h:424
const std::reverse_iterator< const_iterator > const_reverse_iterator
Definition: span.h:434
XGBOOST_DEVICE Span< element_type, dynamic_extent > first(std::size_t _count) const
Definition: span.h:570
constexpr XGBOOST_DEVICE const_reverse_iterator crbegin() const __span_noexcept
Definition: span.h:520
constexpr XGBOOST_DEVICE const_iterator cend() const __span_noexcept
Definition: span.h:508
XGBOOST_DEVICE ~Span() __span_noexcept
Definition: span.h:494
constexpr XGBOOST_DEVICE const_reverse_iterator crend() const __span_noexcept
Definition: span.h:524
constexpr Span() __span_noexcept=default
constexpr XGBOOST_DEVICE iterator end() const __span_noexcept
Definition: span.h:500
XGBOOST_DEVICE reference operator[](index_type _idx) const
Definition: span.h:538
constexpr reverse_iterator rend() const __span_noexcept
Definition: span.h:516
XGBOOST_DEVICE Span & operator=(const Span &_other) __span_noexcept
Definition: span.h:488
std::reverse_iterator< iterator > reverse_iterator
Definition: span.h:433
XGBOOST_DEVICE Span< element_type, dynamic_extent > subspan(index_type _offset, index_type _count=dynamic_extent) const
Definition: span.h:602
Span(const Container &_cont)
Definition: span.h:473
constexpr XGBOOST_DEVICE Span(const Span< U, OtherExtent > &_other) __span_noexcept
Definition: span.h:482
typename std::remove_cv< T >::type value_type
Definition: span.h:425
XGBOOST_DEVICE Span< element_type, dynamic_extent > last(std::size_t _count) const
Definition: span.h:582
XGBOOST_DEVICE pointer operator->() const
Definition: span.h:185
XGBOOST_DEVICE SpanIterator & operator--()
Definition: span.h:202
std::random_access_iterator_tag iterator_category
Definition: span.h:156
XGBOOST_DEVICE reference operator*() const
Definition: span.h:177
constexpr XGBOOST_DEVICE friend bool operator<(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:250
typename SpanType::value_type value_type
Definition: span.h:157
constexpr XGBOOST_DEVICE SpanIterator(const SpanType *_span, typename SpanType::index_type _idx) __span_noexcept
Definition: span.h:166
constexpr XGBOOST_DEVICE friend bool operator>(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:260
constexpr XGBOOST_DEVICE SpanIterator(const SpanIterator< SpanType, B > &other_) __span_noexcept
Definition: span.h:173
XGBOOST_DEVICE SpanIterator operator++(int)
Definition: span.h:196
constexpr XGBOOST_DEVICE friend bool operator==(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:240
XGBOOST_DEVICE SpanIterator & operator+=(difference_type n)
Definition: span.h:219
XGBOOST_DEVICE SpanIterator operator-(difference_type n) const
Definition: span.h:230
XGBOOST_DEVICE SpanIterator & operator-=(difference_type n)
Definition: span.h:235
detail::ptrdiff_t difference_type
Definition: span.h:158
typename std::conditional< IsConst, const ElementType, ElementType >::type & reference
Definition: span.h:161
XGBOOST_DEVICE reference operator[](difference_type n) const
Definition: span.h:181
typename std::add_pointer< reference >::type pointer
Definition: span.h:162
XGBOOST_DEVICE difference_type operator-(SpanIterator rhs) const
Definition: span.h:225
const SpanType * span_
Definition: span.h:271
constexpr XGBOOST_DEVICE friend bool operator>=(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:265
XGBOOST_DEVICE SpanIterator operator+(difference_type n) const
Definition: span.h:214
constexpr SpanIterator()=default
constexpr XGBOOST_DEVICE friend bool operator!=(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:245
constexpr XGBOOST_DEVICE friend bool operator<=(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:255
XGBOOST_DEVICE SpanIterator operator--(int)
Definition: span.h:208
SpanType::index_type index_
Definition: span.h:272
XGBOOST_DEVICE SpanIterator & operator++()
Definition: span.h:190
Definition: intrusive_ptr.h:207
XGBOOST_DEVICE bool LexicographicalCompare(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2)
Definition: span.h:336
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:134
constexpr XGBOOST_DEVICE bool operator>=(Span< T, X > l, Span< U, Y > r)
Definition: span.h:655
constexpr XGBOOST_DEVICE bool operator!=(Span< T, X > l, Span< U, Y > r)
Definition: span.h:631
constexpr std::size_t dynamic_extent
Definition: span.h:141
byte
Definition: span.h:144
XGBOOST_DEVICE auto as_writable_bytes(Span< T, E > s) __span_noexcept -> Span< byte, detail::ExtentAsBytesValue< T, E >::value >
Definition: span.h:666
XGBOOST_DEVICE bool operator==(Span< T, X > l, Span< U, Y > r)
Definition: span.h:617
XGBOOST_DEVICE auto as_bytes(Span< T, E > s) __span_noexcept -> Span< const byte, detail::ExtentAsBytesValue< T, E >::value >
Definition: span.h:660
constexpr XGBOOST_DEVICE bool operator>(Span< T, X > l, Span< U, Y > r)
Definition: span.h:647
constexpr XGBOOST_DEVICE bool operator<=(Span< T, X > l, Span< U, Y > r)
Definition: span.h:642
constexpr XGBOOST_DEVICE bool operator<(Span< T, X > l, Span< U, Y > r)
Definition: span.h:636
constexpr size_t Offset(S(&strides)[D], size_t n, Head head)
Definition: linalg.h:53
#define SPAN_LT(lhs, rhs)
Definition: span.h:123
#define __span_noexcept
span class based on ISO++20 span
Definition: span.h:71
#define SPAN_CHECK(cond)
Definition: span.h:117
constexpr XGBOOST_DEVICE bool operator()(const T &_x, const T &_y) const
Definition: span.h:328
constexpr XGBOOST_DEVICE bool operator()(const T &_x, const T &_y) const
Definition: span.h:321