[libcxx][modularisation] modularises <numeric> header
Differential Revision: https://reviews.llvm.org/D114836
NOKEYCHECK=True
GitOrigin-RevId: a0efb1750065cb51b98f8ef10f07cef8dde7f3a0
diff --git a/include/numeric b/include/numeric
index fc44eff..09d15a6 100644
--- a/include/numeric
+++ b/include/numeric
@@ -145,490 +145,29 @@
*/
#include <__config>
-#include <__debug>
#include <cmath> // for isnormal
#include <functional>
#include <iterator>
-#include <limits> // for numeric_limits
#include <version>
+#include <__numeric/accumulate.h>
+#include <__numeric/adjacent_difference.h>
+#include <__numeric/exclusive_scan.h>
+#include <__numeric/gcd_lcm.h>
+#include <__numeric/inclusive_scan.h>
+#include <__numeric/inner_product.h>
+#include <__numeric/iota.h>
+#include <__numeric/midpoint.h>
+#include <__numeric/partial_sum.h>
+#include <__numeric/reduce.h>
+#include <__numeric/transform_exclusive_scan.h>
+#include <__numeric/transform_inclusive_scan.h>
+#include <__numeric/transform_reduce.h>
+
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-template <class _InputIterator, class _Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_Tp
-accumulate(_InputIterator __first, _InputIterator __last, _Tp __init)
-{
- for (; __first != __last; ++__first)
-#if _LIBCPP_STD_VER > 17
- __init = _VSTD::move(__init) + *__first;
-#else
- __init = __init + *__first;
-#endif
- return __init;
-}
-
-template <class _InputIterator, class _Tp, class _BinaryOperation>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_Tp
-accumulate(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOperation __binary_op)
-{
- for (; __first != __last; ++__first)
-#if _LIBCPP_STD_VER > 17
- __init = __binary_op(_VSTD::move(__init), *__first);
-#else
- __init = __binary_op(__init, *__first);
-#endif
- return __init;
-}
-
-#if _LIBCPP_STD_VER > 14
-template <class _InputIterator, class _Tp, class _BinaryOp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_Tp
-reduce(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOp __b)
-{
- for (; __first != __last; ++__first)
- __init = __b(__init, *__first);
- return __init;
-}
-
-template <class _InputIterator, class _Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_Tp
-reduce(_InputIterator __first, _InputIterator __last, _Tp __init)
-{
- return _VSTD::reduce(__first, __last, __init, _VSTD::plus<>());
-}
-
-template <class _InputIterator>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-typename iterator_traits<_InputIterator>::value_type
-reduce(_InputIterator __first, _InputIterator __last)
-{
- return _VSTD::reduce(__first, __last,
- typename iterator_traits<_InputIterator>::value_type{});
-}
-#endif
-
-template <class _InputIterator1, class _InputIterator2, class _Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_Tp
-inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init)
-{
- for (; __first1 != __last1; ++__first1, (void) ++__first2)
-#if _LIBCPP_STD_VER > 17
- __init = _VSTD::move(__init) + *__first1 * *__first2;
-#else
- __init = __init + *__first1 * *__first2;
-#endif
- return __init;
-}
-
-template <class _InputIterator1, class _InputIterator2, class _Tp, class _BinaryOperation1, class _BinaryOperation2>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_Tp
-inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2,
- _Tp __init, _BinaryOperation1 __binary_op1, _BinaryOperation2 __binary_op2)
-{
- for (; __first1 != __last1; ++__first1, (void) ++__first2)
-#if _LIBCPP_STD_VER > 17
- __init = __binary_op1(_VSTD::move(__init), __binary_op2(*__first1, *__first2));
-#else
- __init = __binary_op1(__init, __binary_op2(*__first1, *__first2));
-#endif
- return __init;
-}
-
-#if _LIBCPP_STD_VER > 14
-template <class _InputIterator, class _Tp, class _BinaryOp, class _UnaryOp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_Tp
-transform_reduce(_InputIterator __first, _InputIterator __last,
- _Tp __init, _BinaryOp __b, _UnaryOp __u)
-{
- for (; __first != __last; ++__first)
- __init = __b(__init, __u(*__first));
- return __init;
-}
-
-template <class _InputIterator1, class _InputIterator2,
- class _Tp, class _BinaryOp1, class _BinaryOp2>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_Tp
-transform_reduce(_InputIterator1 __first1, _InputIterator1 __last1,
- _InputIterator2 __first2, _Tp __init, _BinaryOp1 __b1, _BinaryOp2 __b2)
-{
- for (; __first1 != __last1; ++__first1, (void) ++__first2)
- __init = __b1(__init, __b2(*__first1, *__first2));
- return __init;
-}
-
-template <class _InputIterator1, class _InputIterator2, class _Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_Tp
-transform_reduce(_InputIterator1 __first1, _InputIterator1 __last1,
- _InputIterator2 __first2, _Tp __init)
-{
- return _VSTD::transform_reduce(__first1, __last1, __first2, _VSTD::move(__init),
- _VSTD::plus<>(), _VSTD::multiplies<>());
-}
-#endif
-
-template <class _InputIterator, class _OutputIterator>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator
-partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result)
-{
- if (__first != __last)
- {
- typename iterator_traits<_InputIterator>::value_type __t(*__first);
- *__result = __t;
- for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result)
- {
-#if _LIBCPP_STD_VER > 17
- __t = _VSTD::move(__t) + *__first;
-#else
- __t = __t + *__first;
-#endif
- *__result = __t;
- }
- }
- return __result;
-}
-
-template <class _InputIterator, class _OutputIterator, class _BinaryOperation>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator
-partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result,
- _BinaryOperation __binary_op)
-{
- if (__first != __last)
- {
- typename iterator_traits<_InputIterator>::value_type __t(*__first);
- *__result = __t;
- for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result)
- {
-#if _LIBCPP_STD_VER > 17
- __t = __binary_op(_VSTD::move(__t), *__first);
-#else
- __t = __binary_op(__t, *__first);
-#endif
- *__result = __t;
- }
- }
- return __result;
-}
-
-#if _LIBCPP_STD_VER > 14
-template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator
-exclusive_scan(_InputIterator __first, _InputIterator __last,
- _OutputIterator __result, _Tp __init, _BinaryOp __b)
-{
- if (__first != __last)
- {
- _Tp __tmp(__b(__init, *__first));
- while (true)
- {
- *__result = _VSTD::move(__init);
- ++__result;
- ++__first;
- if (__first == __last)
- break;
- __init = _VSTD::move(__tmp);
- __tmp = __b(__init, *__first);
- }
- }
- return __result;
-}
-
-template <class _InputIterator, class _OutputIterator, class _Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator
-exclusive_scan(_InputIterator __first, _InputIterator __last,
- _OutputIterator __result, _Tp __init)
-{
- return _VSTD::exclusive_scan(__first, __last, __result, __init, _VSTD::plus<>());
-}
-
-template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator inclusive_scan(_InputIterator __first, _InputIterator __last,
- _OutputIterator __result, _BinaryOp __b, _Tp __init)
-{
- for (; __first != __last; ++__first, (void) ++__result) {
- __init = __b(__init, *__first);
- *__result = __init;
- }
- return __result;
-}
-
-template <class _InputIterator, class _OutputIterator, class _BinaryOp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator inclusive_scan(_InputIterator __first, _InputIterator __last,
- _OutputIterator __result, _BinaryOp __b)
-{
- if (__first != __last) {
- typename iterator_traits<_InputIterator>::value_type __init = *__first;
- *__result++ = __init;
- if (++__first != __last)
- return _VSTD::inclusive_scan(__first, __last, __result, __b, __init);
- }
-
- return __result;
-}
-
-template <class _InputIterator, class _OutputIterator>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator inclusive_scan(_InputIterator __first, _InputIterator __last,
- _OutputIterator __result)
-{
- return _VSTD::inclusive_scan(__first, __last, __result, _VSTD::plus<>());
-}
-
-template <class _InputIterator, class _OutputIterator, class _Tp,
- class _BinaryOp, class _UnaryOp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator
-transform_exclusive_scan(_InputIterator __first, _InputIterator __last,
- _OutputIterator __result, _Tp __init,
- _BinaryOp __b, _UnaryOp __u)
-{
- if (__first != __last)
- {
- _Tp __saved = __init;
- do
- {
- __init = __b(__init, __u(*__first));
- *__result = __saved;
- __saved = __init;
- ++__result;
- } while (++__first != __last);
- }
- return __result;
-}
-
-template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp, class _UnaryOp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator
-transform_inclusive_scan(_InputIterator __first, _InputIterator __last,
- _OutputIterator __result, _BinaryOp __b, _UnaryOp __u, _Tp __init)
-{
- for (; __first != __last; ++__first, (void) ++__result) {
- __init = __b(__init, __u(*__first));
- *__result = __init;
- }
-
- return __result;
-}
-
-template <class _InputIterator, class _OutputIterator, class _BinaryOp, class _UnaryOp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator
-transform_inclusive_scan(_InputIterator __first, _InputIterator __last,
- _OutputIterator __result, _BinaryOp __b, _UnaryOp __u)
-{
- if (__first != __last) {
- typename iterator_traits<_InputIterator>::value_type __init = __u(*__first);
- *__result++ = __init;
- if (++__first != __last)
- return _VSTD::transform_inclusive_scan(__first, __last, __result, __b, __u, __init);
- }
-
- return __result;
-}
-#endif
-
-template <class _InputIterator, class _OutputIterator>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator
-adjacent_difference(_InputIterator __first, _InputIterator __last, _OutputIterator __result)
-{
- if (__first != __last)
- {
- typename iterator_traits<_InputIterator>::value_type __acc(*__first);
- *__result = __acc;
- for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result)
- {
- typename iterator_traits<_InputIterator>::value_type __val(*__first);
-#if _LIBCPP_STD_VER > 17
- *__result = __val - _VSTD::move(__acc);
-#else
- *__result = __val - __acc;
-#endif
- __acc = _VSTD::move(__val);
- }
- }
- return __result;
-}
-
-template <class _InputIterator, class _OutputIterator, class _BinaryOperation>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-_OutputIterator
-adjacent_difference(_InputIterator __first, _InputIterator __last, _OutputIterator __result,
- _BinaryOperation __binary_op)
-{
- if (__first != __last)
- {
- typename iterator_traits<_InputIterator>::value_type __acc(*__first);
- *__result = __acc;
- for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result)
- {
- typename iterator_traits<_InputIterator>::value_type __val(*__first);
-#if _LIBCPP_STD_VER > 17
- *__result = __binary_op(__val, _VSTD::move(__acc));
-#else
- *__result = __binary_op(__val, __acc);
-#endif
- __acc = _VSTD::move(__val);
- }
- }
- return __result;
-}
-
-template <class _ForwardIterator, class _Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-void
-iota(_ForwardIterator __first, _ForwardIterator __last, _Tp __value_)
-{
- for (; __first != __last; ++__first, (void) ++__value_)
- *__first = __value_;
-}
-
-
-#if _LIBCPP_STD_VER > 14
-template <typename _Result, typename _Source, bool _IsSigned = is_signed<_Source>::value> struct __ct_abs;
-
-template <typename _Result, typename _Source>
-struct __ct_abs<_Result, _Source, true> {
- _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
- _Result operator()(_Source __t) const noexcept
- {
- if (__t >= 0) return __t;
- if (__t == numeric_limits<_Source>::min()) return -static_cast<_Result>(__t);
- return -__t;
- }
-};
-
-template <typename _Result, typename _Source>
-struct __ct_abs<_Result, _Source, false> {
- _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
- _Result operator()(_Source __t) const noexcept { return __t; }
-};
-
-
-template<class _Tp>
-_LIBCPP_CONSTEXPR _LIBCPP_HIDDEN
-_Tp __gcd(_Tp __m, _Tp __n)
-{
- static_assert((!is_signed<_Tp>::value), "");
- return __n == 0 ? __m : _VSTD::__gcd<_Tp>(__n, __m % __n);
-}
-
-
-template<class _Tp, class _Up>
-_LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-common_type_t<_Tp,_Up>
-gcd(_Tp __m, _Up __n)
-{
- static_assert((is_integral<_Tp>::value && is_integral<_Up>::value), "Arguments to gcd must be integer types");
- static_assert((!is_same<typename remove_cv<_Tp>::type, bool>::value), "First argument to gcd cannot be bool" );
- static_assert((!is_same<typename remove_cv<_Up>::type, bool>::value), "Second argument to gcd cannot be bool" );
- using _Rp = common_type_t<_Tp,_Up>;
- using _Wp = make_unsigned_t<_Rp>;
- return static_cast<_Rp>(_VSTD::__gcd(
- static_cast<_Wp>(__ct_abs<_Rp, _Tp>()(__m)),
- static_cast<_Wp>(__ct_abs<_Rp, _Up>()(__n))));
-}
-
-template<class _Tp, class _Up>
-_LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
-common_type_t<_Tp,_Up>
-lcm(_Tp __m, _Up __n)
-{
- static_assert((is_integral<_Tp>::value && is_integral<_Up>::value), "Arguments to lcm must be integer types");
- static_assert((!is_same<typename remove_cv<_Tp>::type, bool>::value), "First argument to lcm cannot be bool" );
- static_assert((!is_same<typename remove_cv<_Up>::type, bool>::value), "Second argument to lcm cannot be bool" );
- if (__m == 0 || __n == 0)
- return 0;
-
- using _Rp = common_type_t<_Tp,_Up>;
- _Rp __val1 = __ct_abs<_Rp, _Tp>()(__m) / _VSTD::gcd(__m, __n);
- _Rp __val2 = __ct_abs<_Rp, _Up>()(__n);
- _LIBCPP_ASSERT((numeric_limits<_Rp>::max() / __val1 > __val2), "Overflow in lcm");
- return __val1 * __val2;
-}
-
-#endif /* _LIBCPP_STD_VER > 14 */
-
-#if _LIBCPP_STD_VER > 17
-template <class _Tp>
-_LIBCPP_INLINE_VISIBILITY constexpr
-enable_if_t<is_integral_v<_Tp> && !is_same_v<bool, _Tp> && !is_null_pointer_v<_Tp>, _Tp>
-midpoint(_Tp __a, _Tp __b) noexcept
-_LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
-{
- using _Up = make_unsigned_t<_Tp>;
- constexpr _Up __bitshift = numeric_limits<_Up>::digits - 1;
-
- _Up __diff = _Up(__b) - _Up(__a);
- _Up __sign_bit = __b < __a;
-
- _Up __half_diff = (__diff / 2) + (__sign_bit << __bitshift) + (__sign_bit & __diff);
-
- return __a + __half_diff;
-}
-
-
-template <class _TPtr>
-_LIBCPP_INLINE_VISIBILITY constexpr
-enable_if_t<is_pointer_v<_TPtr>
- && is_object_v<remove_pointer_t<_TPtr>>
- && ! is_void_v<remove_pointer_t<_TPtr>>
- && (sizeof(remove_pointer_t<_TPtr>) > 0), _TPtr>
-midpoint(_TPtr __a, _TPtr __b) noexcept
-{
- return __a + _VSTD::midpoint(ptrdiff_t(0), __b - __a);
-}
-
-
-template <typename _Tp>
-constexpr int __sign(_Tp __val) {
- return (_Tp(0) < __val) - (__val < _Tp(0));
-}
-
-template <typename _Fp>
-constexpr _Fp __fp_abs(_Fp __f) { return __f >= 0 ? __f : -__f; }
-
-template <class _Fp>
-_LIBCPP_INLINE_VISIBILITY constexpr
-enable_if_t<is_floating_point_v<_Fp>, _Fp>
-midpoint(_Fp __a, _Fp __b) noexcept
-{
- constexpr _Fp __lo = numeric_limits<_Fp>::min()*2;
- constexpr _Fp __hi = numeric_limits<_Fp>::max()/2;
- return __fp_abs(__a) <= __hi && __fp_abs(__b) <= __hi ? // typical case: overflow is impossible
- (__a + __b)/2 : // always correctly rounded
- __fp_abs(__a) < __lo ? __a + __b/2 : // not safe to halve a
- __fp_abs(__b) < __lo ? __a/2 + __b : // not safe to halve b
- __a/2 + __b/2; // otherwise correctly rounded
-}
-
-#endif // _LIBCPP_STD_VER > 17
-
-_LIBCPP_END_NAMESPACE_STD
-
-_LIBCPP_POP_MACROS
-
#if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17
# include <__pstl_numeric>
#endif