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29 #ifndef XGBOOST_SPAN_H_
30 #define XGBOOST_SPAN_H_
33 #include <xgboost/logging.h>
38 #include <type_traits>
41 #if defined(__CUDACC__)
42 #include <cuda_runtime.h>
43 #endif // defined(__CUDACC__)
62 #if defined(_MSC_VER) && _MSC_VER < 1910
64 #define __span_noexcept
66 #pragma push_macro("constexpr")
71 #define __span_noexcept noexcept
73 #endif // defined(_MSC_VER) && _MSC_VER < 1910
78 #if defined(__CUDA_ARCH__)
84 #define KERNEL_CHECK(cond) \
86 if (XGBOOST_EXPECT(!(cond), false)) { \
91 #else // defined(_MSC_VER)
93 #define __ASSERT_STR_HELPER(x) #x
95 #define KERNEL_CHECK(cond) \
96 (XGBOOST_EXPECT((cond), true) \
97 ? static_cast<void>(0) \
98 : __assert_fail(__ASSERT_STR_HELPER((cond)), __FILE__, __LINE__, \
101 #endif // defined(_MSC_VER)
103 #define SPAN_CHECK KERNEL_CHECK
107 #define KERNEL_CHECK(cond) \
108 (XGBOOST_EXPECT((cond), true) ? static_cast<void>(0) : std::terminate())
110 #define SPAN_CHECK(cond) KERNEL_CHECK(cond)
112 #endif // __CUDA_ARCH__
114 #if defined(__CUDA_ARCH__)
115 #define SPAN_LT(lhs, rhs) KERNEL_CHECK((lhs) < (rhs))
117 #define SPAN_LT(lhs, rhs) KERNEL_CHECK((lhs) < (rhs))
118 #endif // defined(__CUDA_ARCH__)
127 using ptrdiff_t =
typename std::conditional<
128 std::is_same<std::ptrdiff_t, std::int64_t>::value,
132 #if defined(_MSC_VER) && _MSC_VER < 1910
133 constexpr
const std::size_t
137 #endif // defined(_MSC_VER) && _MSC_VER < 1910
139 enum class byte : unsigned char {};
141 template <
class ElementType, std::
size_t Extent>
146 template <
typename SpanType,
bool IsConst>
148 using ElementType =
typename SpanType::element_type;
155 using reference =
typename std::conditional<
156 IsConst,
const ElementType, ElementType>::type&;
157 using pointer =
typename std::add_pointer<reference>::type;
162 const SpanType* _span,
167 template <bool B, typename std::enable_if<!B && IsConst>::type* =
nullptr>
237 return _lhs.span_ == _rhs.span_ && _lhs.index_ == _rhs.index_;
242 return !(_lhs == _rhs);
247 return _lhs.index_ < _rhs.index_;
252 return !(_rhs < _lhs);
262 return !(_rhs > _lhs);
267 typename SpanType::index_type
index_ { 0 };
281 template <std::
size_t Extent, std::
size_t Offset, std::
size_t Count>
283 std::size_t, Count != dynamic_extent ?
284 Count : (Extent != dynamic_extent ? Extent - Offset : Extent)> {};
290 template <
typename T, std::
size_t Extent>
293 Extent == dynamic_extent ?
294 Extent : sizeof(T) * Extent> {};
296 template <std::
size_t From, std::
size_t To>
298 bool, From == To || From == dynamic_extent || To == dynamic_extent> {};
300 template <
class From,
class To>
302 bool, std::is_convertible<From(*)[], To(*)[]>::value> {};
307 template <
class T, std::
size_t Extent>
314 template <
typename T>
321 template <
typename T>
328 template <
class InputIt1,
class InputIt2,
332 InputIt2 first2, InputIt2 last2) {
334 for (; first1 != last1 && first2 != last2; ++first1, ++first2) {
335 if (comp(*first1, *first2)) {
338 if (comp(*first2, *first1)) {
342 return first1 == last1 && first2 != last2;
415 template <
typename T,
435 size_(_count), data_(_ptr) {
441 size_(_last - _first), data_(_first) {
445 template <std::
size_t N>
449 template <
class Container,
450 class =
typename std::enable_if<
451 !std::is_const<element_type>::value &&
453 std::is_convertible<typename Container::pointer, pointer>::value &&
454 std::is_convertible<
typename Container::pointer,
455 decltype(std::declval<Container>().
data())>::value>::type>
457 size_(_cont.
size()), data_(_cont.
data()) {
461 template <
class Container,
462 class =
typename std::enable_if<
463 std::is_const<element_type>::value &&
465 std::is_convertible<typename Container::pointer, pointer>::value &&
466 std::is_convertible<
typename Container::pointer,
467 decltype(std::declval<Container>().
data())>::value>::type>
468 Span(
const Container& _cont) : size_(_cont.
size()),
469 data_(_cont.
data()) {
473 template <
class U, std::size_t OtherExtent,
474 class =
typename std::enable_if<
484 size_ = _other.size();
485 data_ = _other.data();
496 return {
this,
size()};
504 return {
this,
size()};
530 return (*
this)[
size() - 1];
551 return size() *
sizeof(T);
559 template <std::
size_t Count>
562 return {
data(), Count};
566 std::size_t _count)
const {
568 return {
data(), _count};
571 template <std::
size_t Count>
574 return {
data() +
size() - Count, Count};
578 std::size_t _count)
const {
587 template <std::size_t Offset,
591 detail::ExtentValue<Extent, Offset, Count>::value> {
593 (Offset <=
size()) : (Offset + Count <=
size()));
601 (_offset <=
size()) : (_offset + _count <=
size()));
602 return {
data() + _offset, _count ==
611 template <
class T, std::
size_t X,
class U, std::
size_t Y>
613 if (l.size() != r.size()) {
616 for (
auto l_beg = l.cbegin(), r_beg = r.cbegin(); l_beg != l.cend();
618 if (*l_beg != *r_beg) {
625 template <
class T, std::
size_t X,
class U, std::
size_t Y>
630 template <
class T, std::
size_t X,
class U, std::
size_t Y>
636 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>
649 template <
class T, std::
size_t X,
class U, std::
size_t Y>
654 template <
class T, std::
size_t E>
657 return {
reinterpret_cast<const byte*
>(s.data()), s.
size_bytes()};
660 template <
class T, std::
size_t E>
663 return {
reinterpret_cast<byte*
>(s.data()), s.
size_bytes()};
669 #if defined(_MSC_VER) &&_MSC_VER < 1910
671 #pragma pop_macro("constexpr")
672 #undef __span_noexcept
673 #endif // _MSC_VER < 1910
675 #endif // XGBOOST_SPAN_H_
XGBOOST_DEVICE SpanIterator operator--(int)
Definition: span.h:203
constexpr XGBOOST_DEVICE bool operator()(const T &_x, const T &_y) const
Definition: span.h:316
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:129
constexpr Span() __span_noexcept=default
constexpr XGBOOST_DEVICE bool operator<=(Span< T, X > l, Span< U, Y > r)
Definition: span.h:637
constexpr XGBOOST_DEVICE iterator end() const __span_noexcept
Definition: span.h:495
XGBOOST_DEVICE Span< element_type, dynamic_extent > last(std::size_t _count) const
Definition: span.h:577
constexpr XGBOOST_DEVICE bool operator()(const T &_x, const T &_y) const
Definition: span.h:323
XGBOOST_DEVICE SpanIterator & operator--()
Definition: span.h:197
#define __span_noexcept
span class based on ISO++20 span
Definition: span.h:71
constexpr XGBOOST_DEVICE friend bool operator==(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:235
constexpr XGBOOST_DEVICE bool operator>=(Span< T, X > l, Span< U, Y > r)
Definition: span.h:650
XGBOOST_DEVICE Span(pointer _first, pointer _last)
Definition: span.h:440
std::size_t index_type
Definition: span.h:421
byte
Definition: span.h:139
XGBOOST_DEVICE bool operator==(Span< T, X > l, Span< U, Y > r)
Definition: span.h:612
XGBOOST_DEVICE pointer operator->() const
Definition: span.h:180
XGBOOST_DEVICE SpanIterator & operator++()
Definition: span.h:185
xgboost::Entry const element_type
Definition: span.h:419
XGBOOST_DEVICE SpanIterator operator-(difference_type n) const
Definition: span.h:225
XGBOOST_DEVICE Span< element_type, dynamic_extent > subspan(index_type _offset, index_type _count=dynamic_extent) const
Definition: span.h:597
constexpr XGBOOST_DEVICE bool operator<(Span< T, X > l, Span< U, Y > r)
Definition: span.h:631
std::random_access_iterator_tag iterator_category
Definition: span.h:151
defines configuration macros of xgboost.
#define SPAN_CHECK(cond)
Definition: span.h:110
XGBOOST_DEVICE reference operator[](index_type _idx) const
Definition: span.h:533
constexpr XGBOOST_DEVICE friend bool operator>(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:255
XGBOOST_DEVICE bool LexicographicalCompare(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2)
Definition: span.h:331
detail::ptrdiff_t difference_type
Definition: span.h:422
XGBOOST_DEVICE reference back() const
Definition: span.h:529
XGBOOST_DEVICE SpanIterator & operator-=(difference_type n)
Definition: span.h:230
constexpr XGBOOST_DEVICE index_type size_bytes() const __span_noexcept
Definition: span.h:550
detail::ptrdiff_t difference_type
Definition: span.h:153
constexpr XGBOOST_DEVICE Span(element_type(&arr)[N]) __span_noexcept
Definition: span.h:446
constexpr XGBOOST_DEVICE bool operator>(Span< T, X > l, Span< U, Y > r)
Definition: span.h:642
XGBOOST_DEVICE SpanIterator & operator+=(difference_type n)
Definition: span.h:214
XGBOOST_DEVICE reference operator*() const
Definition: span.h:172
constexpr XGBOOST_DEVICE bool empty() const __span_noexcept
Definition: span.h:554
constexpr std::size_t dynamic_extent
Definition: span.h:136
constexpr SpanIterator()=default
XGBOOST_DEVICE SpanIterator operator+(difference_type n) const
Definition: span.h:209
XGBOOST_DEVICE auto as_writable_bytes(Span< T, E > s) __span_noexcept -> Span< byte, detail::ExtentAsBytesValue< T, E >::value >
Definition: span.h:661
constexpr XGBOOST_DEVICE iterator begin() const __span_noexcept
Definition: span.h:491
xgboost::Entry const & reference
Definition: span.h:424
XGBOOST_DEVICE difference_type operator-(SpanIterator rhs) const
Definition: span.h:220
XGBOOST_DEVICE reference operator[](difference_type n) const
Definition: span.h:176
Span(Container &_cont)
Definition: span.h:456
XGBOOST_DEVICE auto subspan() const -> Span< element_type, detail::ExtentValue< Extent, Offset, Count >::value >
Definition: span.h:589
constexpr XGBOOST_DEVICE SpanIterator(const SpanIterator< SpanType, B > &other_) __span_noexcept
Definition: span.h:168
constexpr XGBOOST_DEVICE bool operator!=(Span< T, X > l, Span< U, Y > r)
Definition: span.h:626
XGBOOST_DEVICE reference front() const
Definition: span.h:525
const SpanType * span_
Definition: span.h:266
constexpr XGBOOST_DEVICE friend bool operator<(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:245
XGBOOST_DEVICE reference operator()(index_type _idx) const
Definition: span.h:538
typename std::remove_cv< xgboost::Entry const >::type value_type
Definition: span.h:420
constexpr XGBOOST_DEVICE friend bool operator<=(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:250
constexpr XGBOOST_DEVICE const_reverse_iterator crend() const __span_noexcept
Definition: span.h:519
XGBOOST_DEVICE Span< element_type, dynamic_extent > first(std::size_t _count) const
Definition: span.h:565
constexpr XGBOOST_DEVICE reverse_iterator rbegin() const __span_noexcept
Definition: span.h:507
constexpr XGBOOST_DEVICE friend bool operator>=(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:260
xgboost::Entry const * pointer
Definition: span.h:423
#define SPAN_LT(lhs, rhs)
Definition: span.h:117
XGBOOST_DEVICE Span< element_type, Count > first() const
Definition: span.h:560
span class implementation, based on ISO++20 span<T>. The interface should be the same.
Definition: span.h:142
XGBOOST_DEVICE Span & operator=(const Span &_other) __span_noexcept
Definition: span.h:483
constexpr XGBOOST_DEVICE const_iterator cbegin() const __span_noexcept
Definition: span.h:499
constexpr XGBOOST_DEVICE const_reverse_iterator crbegin() const __span_noexcept
Definition: span.h:515
constexpr XGBOOST_DEVICE index_type size() const __span_noexcept
Definition: span.h:547
XGBOOST_DEVICE Span< element_type, Count > last() const
Definition: span.h:572
constexpr XGBOOST_DEVICE pointer data() const __span_noexcept
Definition: span.h:542
constexpr XGBOOST_DEVICE const_iterator cend() const __span_noexcept
Definition: span.h:503
XGBOOST_DEVICE auto as_bytes(Span< T, E > s) __span_noexcept -> Span< const byte, detail::ExtentAsBytesValue< T, E >::value >
Definition: span.h:655
Span(const Container &_cont)
Definition: span.h:468
XGBOOST_DEVICE SpanIterator operator++(int)
Definition: span.h:191
constexpr XGBOOST_DEVICE Span(const Span &_other) __span_noexcept
Definition: span.h:480
constexpr XGBOOST_DEVICE friend bool operator!=(SpanIterator _lhs, SpanIterator _rhs) __span_noexcept
Definition: span.h:240
typename std::add_pointer< reference >::type pointer
Definition: span.h:157
typename std::conditional< IsConst, const ElementType, ElementType >::type & reference
Definition: span.h:156
SpanType::index_type index_
Definition: span.h:267
#define XGBOOST_DEVICE
Tag function as usable by device.
Definition: base.h:84
typename SpanType::value_type value_type
Definition: span.h:152
XGBOOST_DEVICE ~Span() __span_noexcept
Definition: span.h:489
namespace of xgboost
Definition: base.h:110
constexpr XGBOOST_DEVICE reverse_iterator rend() const __span_noexcept
Definition: span.h:511
constexpr XGBOOST_DEVICE SpanIterator(const SpanType *_span, typename SpanType::index_type _idx) __span_noexcept
Definition: span.h:161
constexpr XGBOOST_DEVICE Span(const Span< U, OtherExtent > &_other) __span_noexcept
Definition: span.h:477