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1// The template and inlines for the -*- C++ -*- valarray class.
2
3// Copyright (C) 1997-2021 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/** @file include/valarray
26 * This is a Standard C++ Library header.
27 */
28
29// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
30
31#ifndef _GLIBCXX_VALARRAY
32#define _GLIBCXX_VALARRAY 1
33
34#pragma GCC system_header
35
36#include <bits/c++config.h>
37#include <cmath>
38#include <algorithm>
39#include <debug/debug.h>
40#if __cplusplus >= 201103L
41#include <initializer_list>
42#endif
43
44namespace std _GLIBCXX_VISIBILITY(default)
45{
46_GLIBCXX_BEGIN_NAMESPACE_VERSION
47
48 template<class _Clos, typename _Tp>
49 class _Expr;
50
51 template<typename _Tp1, typename _Tp2>
52 class _ValArray;
53
54namespace __detail
55{
56 template<class _Oper, template<class, class> class _Meta, class _Dom>
57 struct _UnClos;
58
59 template<class _Oper,
60 template<class, class> class _Meta1,
61 template<class, class> class _Meta2,
62 class _Dom1, class _Dom2>
63 class _BinClos;
64
65 template<template<class, class> class _Meta, class _Dom>
66 class _SClos;
67
68 template<template<class, class> class _Meta, class _Dom>
69 class _GClos;
70
71 template<template<class, class> class _Meta, class _Dom>
72 class _IClos;
73
74 template<template<class, class> class _Meta, class _Dom>
75 class _ValFunClos;
76
77 template<template<class, class> class _Meta, class _Dom>
78 class _RefFunClos;
79} // namespace __detail
80
81 using __detail::_UnClos;
82 using __detail::_BinClos;
83 using __detail::_SClos;
84 using __detail::_GClos;
85 using __detail::_IClos;
86 using __detail::_ValFunClos;
87 using __detail::_RefFunClos;
88
89 template<class _Tp> class valarray; // An array of type _Tp
90 class slice; // BLAS-like slice out of an array
91 template<class _Tp> class slice_array;
92 class gslice; // generalized slice out of an array
93 template<class _Tp> class gslice_array;
94 template<class _Tp> class mask_array; // masked array
95 template<class _Tp> class indirect_array; // indirected array
96
97_GLIBCXX_END_NAMESPACE_VERSION
98} // namespace
99
100#include <bits/valarray_array.h>
101#include <bits/valarray_before.h>
102
103namespace std _GLIBCXX_VISIBILITY(default)
104{
105_GLIBCXX_BEGIN_NAMESPACE_VERSION
106
107 /**
108 * @defgroup numeric_arrays Numeric Arrays
109 * @ingroup numerics
110 *
111 * Classes and functions for representing and manipulating arrays of elements.
112 * @{
113 */
114
115 /**
116 * @brief Smart array designed to support numeric processing.
117 *
118 * A valarray is an array that provides constraints intended to allow for
119 * effective optimization of numeric array processing by reducing the
120 * aliasing that can result from pointer representations. It represents a
121 * one-dimensional array from which different multidimensional subsets can
122 * be accessed and modified.
123 *
124 * @tparam _Tp Type of object in the array.
125 */
126 template<class _Tp>
127 class valarray
128 {
129 template<class _Op>
130 struct _UnaryOp
131 {
132 typedef typename __fun<_Op, _Tp>::result_type __rt;
133 typedef _Expr<_UnClos<_Op, _ValArray, _Tp>, __rt> _Rt;
134 };
135 public:
136 typedef _Tp value_type;
137
138 // _lib.valarray.cons_ construct/destroy:
139 /// Construct an empty array.
140 valarray();
141
142 /// Construct an array with @a n elements.
143 explicit valarray(size_t);
144
145 /// Construct an array with @a n elements initialized to @a t.
146 valarray(const _Tp&, size_t);
147
148 /// Construct an array initialized to the first @a n elements of @a t.
149 valarray(const _Tp* __restrict__, size_t);
150
151 /// Copy constructor.
152 valarray(const valarray&);
153
154#if __cplusplus >= 201103L
155 /// Move constructor.
156 valarray(valarray&&) noexcept;
157#endif
158
159 /// Construct an array with the same size and values in @a sa.
160 valarray(const slice_array<_Tp>&);
161
162 /// Construct an array with the same size and values in @a ga.
163 valarray(const gslice_array<_Tp>&);
164
165 /// Construct an array with the same size and values in @a ma.
166 valarray(const mask_array<_Tp>&);
167
168 /// Construct an array with the same size and values in @a ia.
169 valarray(const indirect_array<_Tp>&);
170
171#if __cplusplus >= 201103L
172 /// Construct an array with an initializer_list of values.
173 valarray(initializer_list<_Tp>);
174#endif
175
176 template<class _Dom>
177 valarray(const _Expr<_Dom, _Tp>& __e);
178
179 ~valarray() _GLIBCXX_NOEXCEPT;
180
181 // _lib.valarray.assign_ assignment:
182 /**
183 * @brief Assign elements to an array.
184 *
185 * Assign elements of array to values in @a v.
186 *
187 * @param __v Valarray to get values from.
188 */
189 valarray<_Tp>& operator=(const valarray<_Tp>& __v);
190
191#if __cplusplus >= 201103L
192 /**
193 * @brief Move assign elements to an array.
194 *
195 * Move assign elements of array to values in @a v.
196 *
197 * @param __v Valarray to get values from.
198 */
199 valarray<_Tp>& operator=(valarray<_Tp>&& __v) noexcept;
200#endif
201
202 /**
203 * @brief Assign elements to a value.
204 *
205 * Assign all elements of array to @a t.
206 *
207 * @param __t Value for elements.
208 */
209 valarray<_Tp>& operator=(const _Tp& __t);
210
211 /**
212 * @brief Assign elements to an array subset.
213 *
214 * Assign elements of array to values in @a sa. Results are undefined
215 * if @a sa does not have the same size as this array.
216 *
217 * @param __sa Array slice to get values from.
218 */
219 valarray<_Tp>& operator=(const slice_array<_Tp>& __sa);
220
221 /**
222 * @brief Assign elements to an array subset.
223 *
224 * Assign elements of array to values in @a ga. Results are undefined
225 * if @a ga does not have the same size as this array.
226 *
227 * @param __ga Array slice to get values from.
228 */
229 valarray<_Tp>& operator=(const gslice_array<_Tp>& __ga);
230
231 /**
232 * @brief Assign elements to an array subset.
233 *
234 * Assign elements of array to values in @a ma. Results are undefined
235 * if @a ma does not have the same size as this array.
236 *
237 * @param __ma Array slice to get values from.
238 */
239 valarray<_Tp>& operator=(const mask_array<_Tp>& __ma);
240
241 /**
242 * @brief Assign elements to an array subset.
243 *
244 * Assign elements of array to values in @a ia. Results are undefined
245 * if @a ia does not have the same size as this array.
246 *
247 * @param __ia Array slice to get values from.
248 */
249 valarray<_Tp>& operator=(const indirect_array<_Tp>& __ia);
250
251#if __cplusplus >= 201103L
252 /**
253 * @brief Assign elements to an initializer_list.
254 *
255 * Assign elements of array to values in @a __l. Results are undefined
256 * if @a __l does not have the same size as this array.
257 *
258 * @param __l initializer_list to get values from.
259 */
260 valarray& operator=(initializer_list<_Tp> __l);
261#endif
262
263 template<class _Dom> valarray<_Tp>&
264 operator= (const _Expr<_Dom, _Tp>&);
265
266 // _lib.valarray.access_ element access:
267 /**
268 * Return a reference to the i'th array element.
269 *
270 * @param __i Index of element to return.
271 * @return Reference to the i'th element.
272 */
273 _Tp& operator[](size_t __i);
274
275 // _GLIBCXX_RESOLVE_LIB_DEFECTS
276 // 389. Const overload of valarray::operator[] returns by value.
277 const _Tp& operator[](size_t) const;
278
279 // _lib.valarray.sub_ subset operations:
280 /**
281 * @brief Return an array subset.
282 *
283 * Returns a new valarray containing the elements of the array
284 * indicated by the slice argument. The new valarray has the same size
285 * as the input slice. @see slice.
286 *
287 * @param __s The source slice.
288 * @return New valarray containing elements in @a __s.
289 */
290 _Expr<_SClos<_ValArray, _Tp>, _Tp> operator[](slice __s) const;
291
292 /**
293 * @brief Return a reference to an array subset.
294 *
295 * Returns a new valarray containing the elements of the array
296 * indicated by the slice argument. The new valarray has the same size
297 * as the input slice. @see slice.
298 *
299 * @param __s The source slice.
300 * @return New valarray containing elements in @a __s.
301 */
302 slice_array<_Tp> operator[](slice __s);
303
304 /**
305 * @brief Return an array subset.
306 *
307 * Returns a slice_array referencing the elements of the array
308 * indicated by the slice argument. @see gslice.
309 *
310 * @param __s The source slice.
311 * @return Slice_array referencing elements indicated by @a __s.
312 */
313 _Expr<_GClos<_ValArray, _Tp>, _Tp> operator[](const gslice& __s) const;
314
315 /**
316 * @brief Return a reference to an array subset.
317 *
318 * Returns a new valarray containing the elements of the array
319 * indicated by the gslice argument. The new valarray has
320 * the same size as the input gslice. @see gslice.
321 *
322 * @param __s The source gslice.
323 * @return New valarray containing elements in @a __s.
324 */
325 gslice_array<_Tp> operator[](const gslice& __s);
326
327 /**
328 * @brief Return an array subset.
329 *
330 * Returns a new valarray containing the elements of the array
331 * indicated by the argument. The input is a valarray of bool which
332 * represents a bitmask indicating which elements should be copied into
333 * the new valarray. Each element of the array is added to the return
334 * valarray if the corresponding element of the argument is true.
335 *
336 * @param __m The valarray bitmask.
337 * @return New valarray containing elements indicated by @a __m.
338 */
339 valarray<_Tp> operator[](const valarray<bool>& __m) const;
340
341 /**
342 * @brief Return a reference to an array subset.
343 *
344 * Returns a new mask_array referencing the elements of the array
345 * indicated by the argument. The input is a valarray of bool which
346 * represents a bitmask indicating which elements are part of the
347 * subset. Elements of the array are part of the subset if the
348 * corresponding element of the argument is true.
349 *
350 * @param __m The valarray bitmask.
351 * @return New valarray containing elements indicated by @a __m.
352 */
353 mask_array<_Tp> operator[](const valarray<bool>& __m);
354
355 /**
356 * @brief Return an array subset.
357 *
358 * Returns a new valarray containing the elements of the array
359 * indicated by the argument. The elements in the argument are
360 * interpreted as the indices of elements of this valarray to copy to
361 * the return valarray.
362 *
363 * @param __i The valarray element index list.
364 * @return New valarray containing elements in @a __s.
365 */
366 _Expr<_IClos<_ValArray, _Tp>, _Tp>
367 operator[](const valarray<size_t>& __i) const;
368
369 /**
370 * @brief Return a reference to an array subset.
371 *
372 * Returns an indirect_array referencing the elements of the array
373 * indicated by the argument. The elements in the argument are
374 * interpreted as the indices of elements of this valarray to include
375 * in the subset. The returned indirect_array refers to these
376 * elements.
377 *
378 * @param __i The valarray element index list.
379 * @return Indirect_array referencing elements in @a __i.
380 */
381 indirect_array<_Tp> operator[](const valarray<size_t>& __i);
382
383 // _lib.valarray.unary_ unary operators:
384 /// Return a new valarray by applying unary + to each element.
385 typename _UnaryOp<__unary_plus>::_Rt operator+() const;
386
387 /// Return a new valarray by applying unary - to each element.
388 typename _UnaryOp<__negate>::_Rt operator-() const;
389
390 /// Return a new valarray by applying unary ~ to each element.
391 typename _UnaryOp<__bitwise_not>::_Rt operator~() const;
392
393 /// Return a new valarray by applying unary ! to each element.
394 typename _UnaryOp<__logical_not>::_Rt operator!() const;
395
396 // _lib.valarray.cassign_ computed assignment:
397 /// Multiply each element of array by @a t.
398 valarray<_Tp>& operator*=(const _Tp&);
399
400 /// Divide each element of array by @a t.
401 valarray<_Tp>& operator/=(const _Tp&);
402
403 /// Set each element e of array to e % @a t.
404 valarray<_Tp>& operator%=(const _Tp&);
405
406 /// Add @a t to each element of array.
407 valarray<_Tp>& operator+=(const _Tp&);
408
409 /// Subtract @a t to each element of array.
410 valarray<_Tp>& operator-=(const _Tp&);
411
412 /// Set each element e of array to e ^ @a t.
413 valarray<_Tp>& operator^=(const _Tp&);
414
415 /// Set each element e of array to e & @a t.
416 valarray<_Tp>& operator&=(const _Tp&);
417
418 /// Set each element e of array to e | @a t.
419 valarray<_Tp>& operator|=(const _Tp&);
420
421 /// Left shift each element e of array by @a t bits.
422 valarray<_Tp>& operator<<=(const _Tp&);
423
424 /// Right shift each element e of array by @a t bits.
425 valarray<_Tp>& operator>>=(const _Tp&);
426
427 /// Multiply elements of array by corresponding elements of @a v.
428 valarray<_Tp>& operator*=(const valarray<_Tp>&);
429
430 /// Divide elements of array by corresponding elements of @a v.
431 valarray<_Tp>& operator/=(const valarray<_Tp>&);
432
433 /// Modulo elements of array by corresponding elements of @a v.
434 valarray<_Tp>& operator%=(const valarray<_Tp>&);
435
436 /// Add corresponding elements of @a v to elements of array.
437 valarray<_Tp>& operator+=(const valarray<_Tp>&);
438
439 /// Subtract corresponding elements of @a v from elements of array.
440 valarray<_Tp>& operator-=(const valarray<_Tp>&);
441
442 /// Logical xor corresponding elements of @a v with elements of array.
443 valarray<_Tp>& operator^=(const valarray<_Tp>&);
444
445 /// Logical or corresponding elements of @a v with elements of array.
446 valarray<_Tp>& operator|=(const valarray<_Tp>&);
447
448 /// Logical and corresponding elements of @a v with elements of array.
449 valarray<_Tp>& operator&=(const valarray<_Tp>&);
450
451 /// Left shift elements of array by corresponding elements of @a v.
452 valarray<_Tp>& operator<<=(const valarray<_Tp>&);
453
454 /// Right shift elements of array by corresponding elements of @a v.
455 valarray<_Tp>& operator>>=(const valarray<_Tp>&);
456
457 template<class _Dom>
458 valarray<_Tp>& operator*=(const _Expr<_Dom, _Tp>&);
459 template<class _Dom>
460 valarray<_Tp>& operator/=(const _Expr<_Dom, _Tp>&);
461 template<class _Dom>
462 valarray<_Tp>& operator%=(const _Expr<_Dom, _Tp>&);
463 template<class _Dom>
464 valarray<_Tp>& operator+=(const _Expr<_Dom, _Tp>&);
465 template<class _Dom>
466 valarray<_Tp>& operator-=(const _Expr<_Dom, _Tp>&);
467 template<class _Dom>
468 valarray<_Tp>& operator^=(const _Expr<_Dom, _Tp>&);
469 template<class _Dom>
470 valarray<_Tp>& operator|=(const _Expr<_Dom, _Tp>&);
471 template<class _Dom>
472 valarray<_Tp>& operator&=(const _Expr<_Dom, _Tp>&);
473 template<class _Dom>
474 valarray<_Tp>& operator<<=(const _Expr<_Dom, _Tp>&);
475 template<class _Dom>
476 valarray<_Tp>& operator>>=(const _Expr<_Dom, _Tp>&);
477
478 // _lib.valarray.members_ member functions:
479#if __cplusplus >= 201103L
480 /// Swap.
481 void swap(valarray<_Tp>& __v) noexcept;
482#endif
483
484 /// Return the number of elements in array.
485 size_t size() const;
486
487 /**
488 * @brief Return the sum of all elements in the array.
489 *
490 * Accumulates the sum of all elements into a Tp using +=. The order
491 * of adding the elements is unspecified.
492 */
493 _Tp sum() const;
494
495 /// Return the minimum element using operator<().
496 _Tp min() const;
497
498 /// Return the maximum element using operator<().
499 _Tp max() const;
500
501 /**
502 * @brief Return a shifted array.
503 *
504 * A new valarray is constructed as a copy of this array with elements
505 * in shifted positions. For an element with index i, the new position
506 * is i - n. The new valarray has the same size as the current one.
507 * New elements without a value are set to 0. Elements whose new
508 * position is outside the bounds of the array are discarded.
509 *
510 * Positive arguments shift toward index 0, discarding elements [0, n).
511 * Negative arguments discard elements from the top of the array.
512 *
513 * @param __n Number of element positions to shift.
514 * @return New valarray with elements in shifted positions.
515 */
516 valarray<_Tp> shift (int __n) const;
517
518 /**
519 * @brief Return a rotated array.
520 *
521 * A new valarray is constructed as a copy of this array with elements
522 * in shifted positions. For an element with index i, the new position
523 * is (i - n) % size(). The new valarray has the same size as the
524 * current one. Elements that are shifted beyond the array bounds are
525 * shifted into the other end of the array. No elements are lost.
526 *
527 * Positive arguments shift toward index 0, wrapping around the top.
528 * Negative arguments shift towards the top, wrapping around to 0.
529 *
530 * @param __n Number of element positions to rotate.
531 * @return New valarray with elements in shifted positions.
532 */
533 valarray<_Tp> cshift(int __n) const;
534
535 /**
536 * @brief Apply a function to the array.
537 *
538 * Returns a new valarray with elements assigned to the result of
539 * applying func to the corresponding element of this array. The new
540 * array has the same size as this one.
541 *
542 * @param func Function of Tp returning Tp to apply.
543 * @return New valarray with transformed elements.
544 */
545 _Expr<_ValFunClos<_ValArray, _Tp>, _Tp> apply(_Tp func(_Tp)) const;
546
547 /**
548 * @brief Apply a function to the array.
549 *
550 * Returns a new valarray with elements assigned to the result of
551 * applying func to the corresponding element of this array. The new
552 * array has the same size as this one.
553 *
554 * @param func Function of const Tp& returning Tp to apply.
555 * @return New valarray with transformed elements.
556 */
557 _Expr<_RefFunClos<_ValArray, _Tp>, _Tp> apply(_Tp func(const _Tp&)) const;
558
559 /**
560 * @brief Resize array.
561 *
562 * Resize this array to @a size and set all elements to @a c. All
563 * references and iterators are invalidated.
564 *
565 * @param __size New array size.
566 * @param __c New value for all elements.
567 */
568 void resize(size_t __size, _Tp __c = _Tp());
569
570 private:
571 size_t _M_size;
572 _Tp* __restrict__ _M_data;
573
574 friend struct _Array<_Tp>;
575 };
576
577#if __cpp_deduction_guides >= 201606
578 template<typename _Tp, size_t _Nm>
579 valarray(const _Tp(&)[_Nm], size_t) -> valarray<_Tp>;
580#endif
581
582 template<typename _Tp>
583 inline const _Tp&
584 valarray<_Tp>::operator[](size_t __i) const
585 {
586 __glibcxx_requires_subscript(__i);
587 return _M_data[__i];
588 }
589
590 template<typename _Tp>
591 inline _Tp&
592 valarray<_Tp>::operator[](size_t __i)
593 {
594 __glibcxx_requires_subscript(__i);
595 return _M_data[__i];
596 }
597
598 /// @} group numeric_arrays
599
600_GLIBCXX_END_NAMESPACE_VERSION
601} // namespace
602
603#include <bits/valarray_after.h>
604#include <bits/slice_array.h>
605#include <bits/gslice.h>
606#include <bits/gslice_array.h>
607#include <bits/mask_array.h>
608#include <bits/indirect_array.h>
609
610namespace std _GLIBCXX_VISIBILITY(default)
611{
612_GLIBCXX_BEGIN_NAMESPACE_VERSION
613
614 /**
615 * @addtogroup numeric_arrays
616 * @{
617 */
618
619 template<typename _Tp>
620 inline
621 valarray<_Tp>::valarray() : _M_size(0), _M_data(0) {}
622
623 template<typename _Tp>
624 inline
625 valarray<_Tp>::valarray(size_t __n)
626 : _M_size(__n), _M_data(__valarray_get_storage<_Tp>(__n))
627 { std::__valarray_default_construct(_M_data, _M_data + __n); }
628
629 template<typename _Tp>
630 inline
631 valarray<_Tp>::valarray(const _Tp& __t, size_t __n)
632 : _M_size(__n), _M_data(__valarray_get_storage<_Tp>(__n))
633 { std::__valarray_fill_construct(_M_data, _M_data + __n, __t); }
634
635 template<typename _Tp>
636 inline
637 valarray<_Tp>::valarray(const _Tp* __restrict__ __p, size_t __n)
638 : _M_size(__n), _M_data(__valarray_get_storage<_Tp>(__n))
639 {
640 __glibcxx_assert(__p != 0 || __n == 0);
641 std::__valarray_copy_construct(__p, __p + __n, _M_data);
642 }
643
644 template<typename _Tp>
645 inline
646 valarray<_Tp>::valarray(const valarray<_Tp>& __v)
647 : _M_size(__v._M_size), _M_data(__valarray_get_storage<_Tp>(__v._M_size))
648 { std::__valarray_copy_construct(__v._M_data, __v._M_data + _M_size,
649 _M_data); }
650
651#if __cplusplus >= 201103L
652 template<typename _Tp>
653 inline
654 valarray<_Tp>::valarray(valarray<_Tp>&& __v) noexcept
655 : _M_size(__v._M_size), _M_data(__v._M_data)
656 {
657 __v._M_size = 0;
658 __v._M_data = 0;
659 }
660#endif
661
662 template<typename _Tp>
663 inline
664 valarray<_Tp>::valarray(const slice_array<_Tp>& __sa)
665 : _M_size(__sa._M_sz), _M_data(__valarray_get_storage<_Tp>(__sa._M_sz))
666 {
667 std::__valarray_copy_construct
668 (__sa._M_array, __sa._M_sz, __sa._M_stride, _Array<_Tp>(_M_data));
669 }
670
671 template<typename _Tp>
672 inline
673 valarray<_Tp>::valarray(const gslice_array<_Tp>& __ga)
674 : _M_size(__ga._M_index.size()),
675 _M_data(__valarray_get_storage<_Tp>(_M_size))
676 {
677 std::__valarray_copy_construct
678 (__ga._M_array, _Array<size_t>(__ga._M_index),
679 _Array<_Tp>(_M_data), _M_size);
680 }
681
682 template<typename _Tp>
683 inline
684 valarray<_Tp>::valarray(const mask_array<_Tp>& __ma)
685 : _M_size(__ma._M_sz), _M_data(__valarray_get_storage<_Tp>(__ma._M_sz))
686 {
687 std::__valarray_copy_construct
688 (__ma._M_array, __ma._M_mask, _Array<_Tp>(_M_data), _M_size);
689 }
690
691 template<typename _Tp>
692 inline
693 valarray<_Tp>::valarray(const indirect_array<_Tp>& __ia)
694 : _M_size(__ia._M_sz), _M_data(__valarray_get_storage<_Tp>(__ia._M_sz))
695 {
696 std::__valarray_copy_construct
697 (__ia._M_array, __ia._M_index, _Array<_Tp>(_M_data), _M_size);
698 }
699
700#if __cplusplus >= 201103L
701 template<typename _Tp>
702 inline
703 valarray<_Tp>::valarray(initializer_list<_Tp> __l)
704 : _M_size(__l.size()), _M_data(__valarray_get_storage<_Tp>(__l.size()))
705 { std::__valarray_copy_construct(__l.begin(), __l.end(), _M_data); }
706#endif
707
708 template<typename _Tp> template<class _Dom>
709 inline
710 valarray<_Tp>::valarray(const _Expr<_Dom, _Tp>& __e)
711 : _M_size(__e.size()), _M_data(__valarray_get_storage<_Tp>(_M_size))
712 { std::__valarray_copy_construct(__e, _M_size, _Array<_Tp>(_M_data)); }
713
714 template<typename _Tp>
715 inline
716 valarray<_Tp>::~valarray() _GLIBCXX_NOEXCEPT
717 {
718 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
719 std::__valarray_release_memory(_M_data);
720 }
721
722 template<typename _Tp>
723 inline valarray<_Tp>&
724 valarray<_Tp>::operator=(const valarray<_Tp>& __v)
725 {
726 // _GLIBCXX_RESOLVE_LIB_DEFECTS
727 // 630. arrays of valarray.
728 if (_M_size == __v._M_size)
729 std::__valarray_copy(__v._M_data, _M_size, _M_data);
730 else
731 {
732 if (_M_data)
733 {
734 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
735 std::__valarray_release_memory(_M_data);
736 }
737 _M_size = __v._M_size;
738 _M_data = __valarray_get_storage<_Tp>(_M_size);
739 std::__valarray_copy_construct(__v._M_data, __v._M_data + _M_size,
740 _M_data);
741 }
742 return *this;
743 }
744
745#if __cplusplus >= 201103L
746 template<typename _Tp>
747 inline valarray<_Tp>&
748 valarray<_Tp>::operator=(valarray<_Tp>&& __v) noexcept
749 {
750 if (_M_data)
751 {
752 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
753 std::__valarray_release_memory(_M_data);
754 }
755 _M_size = __v._M_size;
756 _M_data = __v._M_data;
757 __v._M_size = 0;
758 __v._M_data = 0;
759 return *this;
760 }
761
762 template<typename _Tp>
763 inline valarray<_Tp>&
764 valarray<_Tp>::operator=(initializer_list<_Tp> __l)
765 {
766 // _GLIBCXX_RESOLVE_LIB_DEFECTS
767 // 630. arrays of valarray.
768 if (_M_size == __l.size())
769 std::__valarray_copy(__l.begin(), __l.size(), _M_data);
770 else
771 {
772 if (_M_data)
773 {
774 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
775 std::__valarray_release_memory(_M_data);
776 }
777 _M_size = __l.size();
778 _M_data = __valarray_get_storage<_Tp>(_M_size);
779 std::__valarray_copy_construct(__l.begin(), __l.begin() + _M_size,
780 _M_data);
781 }
782 return *this;
783 }
784#endif
785
786 template<typename _Tp>
787 inline valarray<_Tp>&
788 valarray<_Tp>::operator=(const _Tp& __t)
789 {
790 std::__valarray_fill(_M_data, _M_size, __t);
791 return *this;
792 }
793
794 template<typename _Tp>
795 inline valarray<_Tp>&
796 valarray<_Tp>::operator=(const slice_array<_Tp>& __sa)
797 {
798 __glibcxx_assert(_M_size == __sa._M_sz);
799 std::__valarray_copy(__sa._M_array, __sa._M_sz,
800 __sa._M_stride, _Array<_Tp>(_M_data));
801 return *this;
802 }
803
804 template<typename _Tp>
805 inline valarray<_Tp>&
806 valarray<_Tp>::operator=(const gslice_array<_Tp>& __ga)
807 {
808 __glibcxx_assert(_M_size == __ga._M_index.size());
809 std::__valarray_copy(__ga._M_array, _Array<size_t>(__ga._M_index),
810 _Array<_Tp>(_M_data), _M_size);
811 return *this;
812 }
813
814 template<typename _Tp>
815 inline valarray<_Tp>&
816 valarray<_Tp>::operator=(const mask_array<_Tp>& __ma)
817 {
818 __glibcxx_assert(_M_size == __ma._M_sz);
819 std::__valarray_copy(__ma._M_array, __ma._M_mask,
820 _Array<_Tp>(_M_data), _M_size);
821 return *this;
822 }
823
824 template<typename _Tp>
825 inline valarray<_Tp>&
826 valarray<_Tp>::operator=(const indirect_array<_Tp>& __ia)
827 {
828 __glibcxx_assert(_M_size == __ia._M_sz);
829 std::__valarray_copy(__ia._M_array, __ia._M_index,
830 _Array<_Tp>(_M_data), _M_size);
831 return *this;
832 }
833
834 template<typename _Tp> template<class _Dom>
835 inline valarray<_Tp>&
836 valarray<_Tp>::operator=(const _Expr<_Dom, _Tp>& __e)
837 {
838 // _GLIBCXX_RESOLVE_LIB_DEFECTS
839 // 630. arrays of valarray.
840 if (_M_size == __e.size())
841 std::__valarray_copy(__e, _M_size, _Array<_Tp>(_M_data));
842 else
843 {
844 if (_M_data)
845 {
846 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
847 std::__valarray_release_memory(_M_data);
848 }
849 _M_size = __e.size();
850 _M_data = __valarray_get_storage<_Tp>(_M_size);
851 std::__valarray_copy_construct(__e, _M_size, _Array<_Tp>(_M_data));
852 }
853 return *this;
854 }
855
856 template<typename _Tp>
857 inline _Expr<_SClos<_ValArray,_Tp>, _Tp>
858 valarray<_Tp>::operator[](slice __s) const
859 {
860 typedef _SClos<_ValArray,_Tp> _Closure;
861 return _Expr<_Closure, _Tp>(_Closure (_Array<_Tp>(_M_data), __s));
862 }
863
864 template<typename _Tp>
865 inline slice_array<_Tp>
866 valarray<_Tp>::operator[](slice __s)
867 { return slice_array<_Tp>(_Array<_Tp>(_M_data), __s); }
868
869 template<typename _Tp>
870 inline _Expr<_GClos<_ValArray,_Tp>, _Tp>
871 valarray<_Tp>::operator[](const gslice& __gs) const
872 {
873 typedef _GClos<_ValArray,_Tp> _Closure;
874 return _Expr<_Closure, _Tp>
875 (_Closure(_Array<_Tp>(_M_data), __gs._M_index->_M_index));
876 }
877
878 template<typename _Tp>
879 inline gslice_array<_Tp>
880 valarray<_Tp>::operator[](const gslice& __gs)
881 {
882 return gslice_array<_Tp>
883 (_Array<_Tp>(_M_data), __gs._M_index->_M_index);
884 }
885
886 template<typename _Tp>
887 inline valarray<_Tp>
888 valarray<_Tp>::operator[](const valarray<bool>& __m) const
889 {
890 size_t __s = 0;
891 size_t __e = __m.size();
892 for (size_t __i=0; __i<__e; ++__i)
893 if (__m[__i]) ++__s;
894 return valarray<_Tp>(mask_array<_Tp>(_Array<_Tp>(_M_data), __s,
895 _Array<bool> (__m)));
896 }
897
898 template<typename _Tp>
899 inline mask_array<_Tp>
900 valarray<_Tp>::operator[](const valarray<bool>& __m)
901 {
902 size_t __s = 0;
903 size_t __e = __m.size();
904 for (size_t __i=0; __i<__e; ++__i)
905 if (__m[__i]) ++__s;
906 return mask_array<_Tp>(_Array<_Tp>(_M_data), __s, _Array<bool>(__m));
907 }
908
909 template<typename _Tp>
910 inline _Expr<_IClos<_ValArray,_Tp>, _Tp>
911 valarray<_Tp>::operator[](const valarray<size_t>& __i) const
912 {
913 typedef _IClos<_ValArray,_Tp> _Closure;
914 return _Expr<_Closure, _Tp>(_Closure(*this, __i));
915 }
916
917 template<typename _Tp>
918 inline indirect_array<_Tp>
919 valarray<_Tp>::operator[](const valarray<size_t>& __i)
920 {
921 return indirect_array<_Tp>(_Array<_Tp>(_M_data), __i.size(),
922 _Array<size_t>(__i));
923 }
924
925#if __cplusplus >= 201103L
926 template<class _Tp>
927 inline void
928 valarray<_Tp>::swap(valarray<_Tp>& __v) noexcept
929 {
930 std::swap(_M_size, __v._M_size);
931 std::swap(_M_data, __v._M_data);
932 }
933#endif
934
935 template<class _Tp>
936 inline size_t
937 valarray<_Tp>::size() const
938 { return _M_size; }
939
940 template<class _Tp>
941 inline _Tp
942 valarray<_Tp>::sum() const
943 {
944 __glibcxx_assert(_M_size > 0);
945 return std::__valarray_sum(_M_data, _M_data + _M_size);
946 }
947
948 template<class _Tp>
949 inline valarray<_Tp>
950 valarray<_Tp>::shift(int __n) const
951 {
952 valarray<_Tp> __ret;
953
954 if (_M_size == 0)
955 return __ret;
956
957 _Tp* __restrict__ __tmp_M_data =
958 std::__valarray_get_storage<_Tp>(_M_size);
959
960 if (__n == 0)
961 std::__valarray_copy_construct(_M_data,
962 _M_data + _M_size, __tmp_M_data);
963 else if (__n > 0) // shift left
964 {
965 if (size_t(__n) > _M_size)
966 __n = int(_M_size);
967
968 std::__valarray_copy_construct(_M_data + __n,
969 _M_data + _M_size, __tmp_M_data);
970 std::__valarray_default_construct(__tmp_M_data + _M_size - __n,
971 __tmp_M_data + _M_size);
972 }
973 else // shift right
974 {
975 if (-size_t(__n) > _M_size)
976 __n = -int(_M_size);
977
978 std::__valarray_copy_construct(_M_data, _M_data + _M_size + __n,
979 __tmp_M_data - __n);
980 std::__valarray_default_construct(__tmp_M_data,
981 __tmp_M_data - __n);
982 }
983
984 __ret._M_size = _M_size;
985 __ret._M_data = __tmp_M_data;
986 return __ret;
987 }
988
989 template<class _Tp>
990 inline valarray<_Tp>
991 valarray<_Tp>::cshift(int __n) const
992 {
993 valarray<_Tp> __ret;
994
995 if (_M_size == 0)
996 return __ret;
997
998 _Tp* __restrict__ __tmp_M_data =
999 std::__valarray_get_storage<_Tp>(_M_size);
1000
1001 if (__n == 0)
1002 std::__valarray_copy_construct(_M_data,
1003 _M_data + _M_size, __tmp_M_data);
1004 else if (__n > 0) // cshift left
1005 {
1006 if (size_t(__n) > _M_size)
1007 __n = int(__n % _M_size);
1008
1009 std::__valarray_copy_construct(_M_data, _M_data + __n,
1010 __tmp_M_data + _M_size - __n);
1011 std::__valarray_copy_construct(_M_data + __n, _M_data + _M_size,
1012 __tmp_M_data);
1013 }
1014 else // cshift right
1015 {
1016 if (-size_t(__n) > _M_size)
1017 __n = -int(-size_t(__n) % _M_size);
1018
1019 std::__valarray_copy_construct(_M_data + _M_size + __n,
1020 _M_data + _M_size, __tmp_M_data);
1021 std::__valarray_copy_construct(_M_data, _M_data + _M_size + __n,
1022 __tmp_M_data - __n);
1023 }
1024
1025 __ret._M_size = _M_size;
1026 __ret._M_data = __tmp_M_data;
1027 return __ret;
1028 }
1029
1030 template<class _Tp>
1031 inline void
1032 valarray<_Tp>::resize(size_t __n, _Tp __c)
1033 {
1034 // This complication is so to make valarray<valarray<T> > work
1035 // even though it is not required by the standard. Nobody should
1036 // be saying valarray<valarray<T> > anyway. See the specs.
1037 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
1038 if (_M_size != __n)
1039 {
1040 std::__valarray_release_memory(_M_data);
1041 _M_size = __n;
1042 _M_data = __valarray_get_storage<_Tp>(__n);
1043 }
1044 std::__valarray_fill_construct(_M_data, _M_data + __n, __c);
1045 }
1046
1047 template<typename _Tp>
1048 inline _Tp
1049 valarray<_Tp>::min() const
1050 {
1051 __glibcxx_assert(_M_size > 0);
1052 return *std::min_element(_M_data, _M_data + _M_size);
1053 }
1054
1055 template<typename _Tp>
1056 inline _Tp
1057 valarray<_Tp>::max() const
1058 {
1059 __glibcxx_assert(_M_size > 0);
1060 return *std::max_element(_M_data, _M_data + _M_size);
1061 }
1062
1063 template<class _Tp>
1064 inline _Expr<_ValFunClos<_ValArray, _Tp>, _Tp>
1065 valarray<_Tp>::apply(_Tp func(_Tp)) const
1066 {
1067 typedef _ValFunClos<_ValArray, _Tp> _Closure;
1068 return _Expr<_Closure, _Tp>(_Closure(*this, func));
1069 }
1070
1071 template<class _Tp>
1072 inline _Expr<_RefFunClos<_ValArray, _Tp>, _Tp>
1073 valarray<_Tp>::apply(_Tp func(const _Tp &)) const
1074 {
1075 typedef _RefFunClos<_ValArray, _Tp> _Closure;
1076 return _Expr<_Closure, _Tp>(_Closure(*this, func));
1077 }
1078
1079#define _DEFINE_VALARRAY_UNARY_OPERATOR(_Op, _Name) \
1080 template<typename _Tp> \
1081 inline typename valarray<_Tp>::template _UnaryOp<_Name>::_Rt \
1082 valarray<_Tp>::operator _Op() const \
1083 { \
1084 typedef _UnClos<_Name, _ValArray, _Tp> _Closure; \
1085 typedef typename __fun<_Name, _Tp>::result_type _Rt; \
1086 return _Expr<_Closure, _Rt>(_Closure(*this)); \
1087 }
1088
1089 _DEFINE_VALARRAY_UNARY_OPERATOR(+, __unary_plus)
1090 _DEFINE_VALARRAY_UNARY_OPERATOR(-, __negate)
1091 _DEFINE_VALARRAY_UNARY_OPERATOR(~, __bitwise_not)
1092 _DEFINE_VALARRAY_UNARY_OPERATOR (!, __logical_not)
1093
1094#undef _DEFINE_VALARRAY_UNARY_OPERATOR
1095
1096#define _DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(_Op, _Name) \
1097 template<class _Tp> \
1098 inline valarray<_Tp>& \
1099 valarray<_Tp>::operator _Op##=(const _Tp &__t) \
1100 { \
1101 _Array_augmented_##_Name(_Array<_Tp>(_M_data), _M_size, __t); \
1102 return *this; \
1103 } \
1104 \
1105 template<class _Tp> \
1106 inline valarray<_Tp>& \
1107 valarray<_Tp>::operator _Op##=(const valarray<_Tp> &__v) \
1108 { \
1109 __glibcxx_assert(_M_size == __v._M_size); \
1110 _Array_augmented_##_Name(_Array<_Tp>(_M_data), _M_size, \
1111 _Array<_Tp>(__v._M_data)); \
1112 return *this; \
1113 }
1114
1115_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(+, __plus)
1116_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(-, __minus)
1117_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(*, __multiplies)
1118_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(/, __divides)
1119_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(%, __modulus)
1120_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(^, __bitwise_xor)
1121_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(&, __bitwise_and)
1122_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(|, __bitwise_or)
1123_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(<<, __shift_left)
1124_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(>>, __shift_right)
1125
1126#undef _DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT
1127
1128#define _DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(_Op, _Name) \
1129 template<class _Tp> template<class _Dom> \
1130 inline valarray<_Tp>& \
1131 valarray<_Tp>::operator _Op##=(const _Expr<_Dom, _Tp>& __e) \
1132 { \
1133 _Array_augmented_##_Name(_Array<_Tp>(_M_data), __e, _M_size); \
1134 return *this; \
1135 }
1136
1137_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(+, __plus)
1138_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(-, __minus)
1139_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(*, __multiplies)
1140_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(/, __divides)
1141_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(%, __modulus)
1142_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(^, __bitwise_xor)
1143_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(&, __bitwise_and)
1144_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(|, __bitwise_or)
1145_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(<<, __shift_left)
1146_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(>>, __shift_right)
1147
1148#undef _DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT
1149
1150
1151#define _DEFINE_BINARY_OPERATOR(_Op, _Name) \
1152 template<typename _Tp> \
1153 inline _Expr<_BinClos<_Name, _ValArray, _ValArray, _Tp, _Tp>, \
1154 typename __fun<_Name, _Tp>::result_type> \
1155 operator _Op(const valarray<_Tp>& __v, const valarray<_Tp>& __w) \
1156 { \
1157 __glibcxx_assert(__v.size() == __w.size()); \
1158 typedef _BinClos<_Name, _ValArray, _ValArray, _Tp, _Tp> _Closure; \
1159 typedef typename __fun<_Name, _Tp>::result_type _Rt; \
1160 return _Expr<_Closure, _Rt>(_Closure(__v, __w)); \
1161 } \
1162 \
1163 template<typename _Tp> \
1164 inline _Expr<_BinClos<_Name, _ValArray,_Constant, _Tp, _Tp>, \
1165 typename __fun<_Name, _Tp>::result_type> \
1166 operator _Op(const valarray<_Tp>& __v, \
1167 const typename valarray<_Tp>::value_type& __t) \
1168 { \
1169 typedef _BinClos<_Name, _ValArray, _Constant, _Tp, _Tp> _Closure; \
1170 typedef typename __fun<_Name, _Tp>::result_type _Rt; \
1171 return _Expr<_Closure, _Rt>(_Closure(__v, __t)); \
1172 } \
1173 \
1174 template<typename _Tp> \
1175 inline _Expr<_BinClos<_Name, _Constant, _ValArray, _Tp, _Tp>, \
1176 typename __fun<_Name, _Tp>::result_type> \
1177 operator _Op(const typename valarray<_Tp>::value_type& __t, \
1178 const valarray<_Tp>& __v) \
1179 { \
1180 typedef _BinClos<_Name, _Constant, _ValArray, _Tp, _Tp> _Closure; \
1181 typedef typename __fun<_Name, _Tp>::result_type _Rt; \
1182 return _Expr<_Closure, _Rt>(_Closure(__t, __v)); \
1183 }
1184
1185_DEFINE_BINARY_OPERATOR(+, __plus)
1186_DEFINE_BINARY_OPERATOR(-, __minus)
1187_DEFINE_BINARY_OPERATOR(*, __multiplies)
1188_DEFINE_BINARY_OPERATOR(/, __divides)
1189_DEFINE_BINARY_OPERATOR(%, __modulus)
1190_DEFINE_BINARY_OPERATOR(^, __bitwise_xor)
1191_DEFINE_BINARY_OPERATOR(&, __bitwise_and)
1192_DEFINE_BINARY_OPERATOR(|, __bitwise_or)
1193_DEFINE_BINARY_OPERATOR(<<, __shift_left)
1194_DEFINE_BINARY_OPERATOR(>>, __shift_right)
1195_DEFINE_BINARY_OPERATOR(&&, __logical_and)
1196_DEFINE_BINARY_OPERATOR(||, __logical_or)
1197_DEFINE_BINARY_OPERATOR(==, __equal_to)
1198_DEFINE_BINARY_OPERATOR(!=, __not_equal_to)
1199_DEFINE_BINARY_OPERATOR(<, __less)
1200_DEFINE_BINARY_OPERATOR(>, __greater)
1201_DEFINE_BINARY_OPERATOR(<=, __less_equal)
1202_DEFINE_BINARY_OPERATOR(>=, __greater_equal)
1203
1204#undef _DEFINE_BINARY_OPERATOR
1205
1206#if __cplusplus >= 201103L
1207 /**
1208 * @brief Return an iterator pointing to the first element of
1209 * the valarray.
1210 * @param __va valarray.
1211 */
1212 template<class _Tp>
1213 inline _Tp*
1214 begin(valarray<_Tp>& __va)
1215 { return std::__addressof(__va[0]); }
1216
1217 /**
1218 * @brief Return an iterator pointing to the first element of
1219 * the const valarray.
1220 * @param __va valarray.
1221 */
1222 template<class _Tp>
1223 inline const _Tp*
1224 begin(const valarray<_Tp>& __va)
1225 { return std::__addressof(__va[0]); }
1226
1227 /**
1228 * @brief Return an iterator pointing to one past the last element of
1229 * the valarray.
1230 * @param __va valarray.
1231 */
1232 template<class _Tp>
1233 inline _Tp*
1234 end(valarray<_Tp>& __va)
1235 { return std::__addressof(__va[0]) + __va.size(); }
1236
1237 /**
1238 * @brief Return an iterator pointing to one past the last element of
1239 * the const valarray.
1240 * @param __va valarray.
1241 */
1242 template<class _Tp>
1243 inline const _Tp*
1244 end(const valarray<_Tp>& __va)
1245 { return std::__addressof(__va[0]) + __va.size(); }
1246#endif // C++11
1247
1248 /// @} group numeric_arrays
1249
1250_GLIBCXX_END_NAMESPACE_VERSION
1251} // namespace
1252
1253#endif /* _GLIBCXX_VALARRAY */
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