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1// The template and inlines for the -*- C++ -*- valarray class.
2
3// Copyright (C) 1997-2018 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
54 template<class _Oper, template<class, class> class _Meta, class _Dom>
55 struct _UnClos;
56
57 template<class _Oper,
58 template<class, class> class _Meta1,
59 template<class, class> class _Meta2,
60 class _Dom1, class _Dom2>
61 class _BinClos;
62
63 template<template<class, class> class _Meta, class _Dom>
64 class _SClos;
65
66 template<template<class, class> class _Meta, class _Dom>
67 class _GClos;
68
69 template<template<class, class> class _Meta, class _Dom>
70 class _IClos;
71
72 template<template<class, class> class _Meta, class _Dom>
73 class _ValFunClos;
74
75 template<template<class, class> class _Meta, class _Dom>
76 class _RefFunClos;
77
78 template<class _Tp> class valarray; // An array of type _Tp
79 class slice; // BLAS-like slice out of an array
80 template<class _Tp> class slice_array;
81 class gslice; // generalized slice out of an array
82 template<class _Tp> class gslice_array;
83 template<class _Tp> class mask_array; // masked array
84 template<class _Tp> class indirect_array; // indirected array
85
86_GLIBCXX_END_NAMESPACE_VERSION
87} // namespace
88
89#include <bits/valarray_array.h>
90#include <bits/valarray_before.h>
91
92namespace std _GLIBCXX_VISIBILITY(default)
93{
94_GLIBCXX_BEGIN_NAMESPACE_VERSION
95
96 /**
97 * @defgroup numeric_arrays Numeric Arrays
98 * @ingroup numerics
99 *
100 * Classes and functions for representing and manipulating arrays of elements.
101 * @{
102 */
103
104 /**
105 * @brief Smart array designed to support numeric processing.
106 *
107 * A valarray is an array that provides constraints intended to allow for
108 * effective optimization of numeric array processing by reducing the
109 * aliasing that can result from pointer representations. It represents a
110 * one-dimensional array from which different multidimensional subsets can
111 * be accessed and modified.
112 *
113 * @tparam _Tp Type of object in the array.
114 */
115 template<class _Tp>
116 class valarray
117 {
118 template<class _Op>
119 struct _UnaryOp
120 {
121 typedef typename __fun<_Op, _Tp>::result_type __rt;
122 typedef _Expr<_UnClos<_Op, _ValArray, _Tp>, __rt> _Rt;
123 };
124 public:
125 typedef _Tp value_type;
126
127 // _lib.valarray.cons_ construct/destroy:
128 /// Construct an empty array.
129 valarray();
130
131 /// Construct an array with @a n elements.
132 explicit valarray(size_t);
133
134 /// Construct an array with @a n elements initialized to @a t.
135 valarray(const _Tp&, size_t);
136
137 /// Construct an array initialized to the first @a n elements of @a t.
138 valarray(const _Tp* __restrict__, size_t);
139
140 /// Copy constructor.
141 valarray(const valarray&);
142
143#if __cplusplus >= 201103L
144 /// Move constructor.
145 valarray(valarray&&) noexcept;
146#endif
147
148 /// Construct an array with the same size and values in @a sa.
149 valarray(const slice_array<_Tp>&);
150
151 /// Construct an array with the same size and values in @a ga.
152 valarray(const gslice_array<_Tp>&);
153
154 /// Construct an array with the same size and values in @a ma.
155 valarray(const mask_array<_Tp>&);
156
157 /// Construct an array with the same size and values in @a ia.
158 valarray(const indirect_array<_Tp>&);
159
160#if __cplusplus >= 201103L
161 /// Construct an array with an initializer_list of values.
162 valarray(initializer_list<_Tp>);
163#endif
164
165 template<class _Dom>
166 valarray(const _Expr<_Dom, _Tp>& __e);
167
168 ~valarray() _GLIBCXX_NOEXCEPT;
169
170 // _lib.valarray.assign_ assignment:
171 /**
172 * @brief Assign elements to an array.
173 *
174 * Assign elements of array to values in @a v.
175 *
176 * @param __v Valarray to get values from.
177 */
178 valarray<_Tp>& operator=(const valarray<_Tp>& __v);
179
180#if __cplusplus >= 201103L
181 /**
182 * @brief Move assign elements to an array.
183 *
184 * Move assign elements of array to values in @a v.
185 *
186 * @param __v Valarray to get values from.
187 */
188 valarray<_Tp>& operator=(valarray<_Tp>&& __v) noexcept;
189#endif
190
191 /**
192 * @brief Assign elements to a value.
193 *
194 * Assign all elements of array to @a t.
195 *
196 * @param __t Value for elements.
197 */
198 valarray<_Tp>& operator=(const _Tp& __t);
199
200 /**
201 * @brief Assign elements to an array subset.
202 *
203 * Assign elements of array to values in @a sa. Results are undefined
204 * if @a sa does not have the same size as this array.
205 *
206 * @param __sa Array slice to get values from.
207 */
208 valarray<_Tp>& operator=(const slice_array<_Tp>& __sa);
209
210 /**
211 * @brief Assign elements to an array subset.
212 *
213 * Assign elements of array to values in @a ga. Results are undefined
214 * if @a ga does not have the same size as this array.
215 *
216 * @param __ga Array slice to get values from.
217 */
218 valarray<_Tp>& operator=(const gslice_array<_Tp>& __ga);
219
220 /**
221 * @brief Assign elements to an array subset.
222 *
223 * Assign elements of array to values in @a ma. Results are undefined
224 * if @a ma does not have the same size as this array.
225 *
226 * @param __ma Array slice to get values from.
227 */
228 valarray<_Tp>& operator=(const mask_array<_Tp>& __ma);
229
230 /**
231 * @brief Assign elements to an array subset.
232 *
233 * Assign elements of array to values in @a ia. Results are undefined
234 * if @a ia does not have the same size as this array.
235 *
236 * @param __ia Array slice to get values from.
237 */
238 valarray<_Tp>& operator=(const indirect_array<_Tp>& __ia);
239
240#if __cplusplus >= 201103L
241 /**
242 * @brief Assign elements to an initializer_list.
243 *
244 * Assign elements of array to values in @a __l. Results are undefined
245 * if @a __l does not have the same size as this array.
246 *
247 * @param __l initializer_list to get values from.
248 */
249 valarray& operator=(initializer_list<_Tp> __l);
250#endif
251
252 template<class _Dom> valarray<_Tp>&
253 operator= (const _Expr<_Dom, _Tp>&);
254
255 // _lib.valarray.access_ element access:
256 /**
257 * Return a reference to the i'th array element.
258 *
259 * @param __i Index of element to return.
260 * @return Reference to the i'th element.
261 */
262 _Tp& operator[](size_t __i);
263
264 // _GLIBCXX_RESOLVE_LIB_DEFECTS
265 // 389. Const overload of valarray::operator[] returns by value.
266 const _Tp& operator[](size_t) const;
267
268 // _lib.valarray.sub_ subset operations:
269 /**
270 * @brief Return an array subset.
271 *
272 * Returns a new valarray containing the elements of the array
273 * indicated by the slice argument. The new valarray has the same size
274 * as the input slice. @see slice.
275 *
276 * @param __s The source slice.
277 * @return New valarray containing elements in @a __s.
278 */
279 _Expr<_SClos<_ValArray, _Tp>, _Tp> operator[](slice __s) const;
280
281 /**
282 * @brief Return a reference to an array subset.
283 *
284 * Returns a new valarray containing the elements of the array
285 * indicated by the slice argument. The new valarray has the same size
286 * as the input slice. @see slice.
287 *
288 * @param __s The source slice.
289 * @return New valarray containing elements in @a __s.
290 */
291 slice_array<_Tp> operator[](slice __s);
292
293 /**
294 * @brief Return an array subset.
295 *
296 * Returns a slice_array referencing the elements of the array
297 * indicated by the slice argument. @see gslice.
298 *
299 * @param __s The source slice.
300 * @return Slice_array referencing elements indicated by @a __s.
301 */
302 _Expr<_GClos<_ValArray, _Tp>, _Tp> operator[](const gslice& __s) const;
303
304 /**
305 * @brief Return a reference to an array subset.
306 *
307 * Returns a new valarray containing the elements of the array
308 * indicated by the gslice argument. The new valarray has
309 * the same size as the input gslice. @see gslice.
310 *
311 * @param __s The source gslice.
312 * @return New valarray containing elements in @a __s.
313 */
314 gslice_array<_Tp> operator[](const gslice& __s);
315
316 /**
317 * @brief Return an array subset.
318 *
319 * Returns a new valarray containing the elements of the array
320 * indicated by the argument. The input is a valarray of bool which
321 * represents a bitmask indicating which elements should be copied into
322 * the new valarray. Each element of the array is added to the return
323 * valarray if the corresponding element of the argument is true.
324 *
325 * @param __m The valarray bitmask.
326 * @return New valarray containing elements indicated by @a __m.
327 */
328 valarray<_Tp> operator[](const valarray<bool>& __m) const;
329
330 /**
331 * @brief Return a reference to an array subset.
332 *
333 * Returns a new mask_array referencing the elements of the array
334 * indicated by the argument. The input is a valarray of bool which
335 * represents a bitmask indicating which elements are part of the
336 * subset. Elements of the array are part of the subset if the
337 * corresponding element of the argument is true.
338 *
339 * @param __m The valarray bitmask.
340 * @return New valarray containing elements indicated by @a __m.
341 */
342 mask_array<_Tp> operator[](const valarray<bool>& __m);
343
344 /**
345 * @brief Return an array subset.
346 *
347 * Returns a new valarray containing the elements of the array
348 * indicated by the argument. The elements in the argument are
349 * interpreted as the indices of elements of this valarray to copy to
350 * the return valarray.
351 *
352 * @param __i The valarray element index list.
353 * @return New valarray containing elements in @a __s.
354 */
355 _Expr<_IClos<_ValArray, _Tp>, _Tp>
356 operator[](const valarray<size_t>& __i) const;
357
358 /**
359 * @brief Return a reference to an array subset.
360 *
361 * Returns an indirect_array referencing the elements of the array
362 * indicated by the argument. The elements in the argument are
363 * interpreted as the indices of elements of this valarray to include
364 * in the subset. The returned indirect_array refers to these
365 * elements.
366 *
367 * @param __i The valarray element index list.
368 * @return Indirect_array referencing elements in @a __i.
369 */
370 indirect_array<_Tp> operator[](const valarray<size_t>& __i);
371
372 // _lib.valarray.unary_ unary operators:
373 /// Return a new valarray by applying unary + to each element.
374 typename _UnaryOp<__unary_plus>::_Rt operator+() const;
375
376 /// Return a new valarray by applying unary - to each element.
377 typename _UnaryOp<__negate>::_Rt operator-() const;
378
379 /// Return a new valarray by applying unary ~ to each element.
380 typename _UnaryOp<__bitwise_not>::_Rt operator~() const;
381
382 /// Return a new valarray by applying unary ! to each element.
383 typename _UnaryOp<__logical_not>::_Rt operator!() const;
384
385 // _lib.valarray.cassign_ computed assignment:
386 /// Multiply each element of array by @a t.
387 valarray<_Tp>& operator*=(const _Tp&);
388
389 /// Divide each element of array by @a t.
390 valarray<_Tp>& operator/=(const _Tp&);
391
392 /// Set each element e of array to e % @a t.
393 valarray<_Tp>& operator%=(const _Tp&);
394
395 /// Add @a t to each element of array.
396 valarray<_Tp>& operator+=(const _Tp&);
397
398 /// Subtract @a t to each element of array.
399 valarray<_Tp>& operator-=(const _Tp&);
400
401 /// Set each element e of array to e ^ @a t.
402 valarray<_Tp>& operator^=(const _Tp&);
403
404 /// Set each element e of array to e & @a t.
405 valarray<_Tp>& operator&=(const _Tp&);
406
407 /// Set each element e of array to e | @a t.
408 valarray<_Tp>& operator|=(const _Tp&);
409
410 /// Left shift each element e of array by @a t bits.
411 valarray<_Tp>& operator<<=(const _Tp&);
412
413 /// Right shift each element e of array by @a t bits.
414 valarray<_Tp>& operator>>=(const _Tp&);
415
416 /// Multiply elements of array by corresponding elements of @a v.
417 valarray<_Tp>& operator*=(const valarray<_Tp>&);
418
419 /// Divide elements of array by corresponding elements of @a v.
420 valarray<_Tp>& operator/=(const valarray<_Tp>&);
421
422 /// Modulo elements of array by corresponding elements of @a v.
423 valarray<_Tp>& operator%=(const valarray<_Tp>&);
424
425 /// Add corresponding elements of @a v to elements of array.
426 valarray<_Tp>& operator+=(const valarray<_Tp>&);
427
428 /// Subtract corresponding elements of @a v from elements of array.
429 valarray<_Tp>& operator-=(const valarray<_Tp>&);
430
431 /// Logical xor corresponding elements of @a v with elements of array.
432 valarray<_Tp>& operator^=(const valarray<_Tp>&);
433
434 /// Logical or corresponding elements of @a v with elements of array.
435 valarray<_Tp>& operator|=(const valarray<_Tp>&);
436
437 /// Logical and corresponding elements of @a v with elements of array.
438 valarray<_Tp>& operator&=(const valarray<_Tp>&);
439
440 /// Left shift elements of array by corresponding elements of @a v.
441 valarray<_Tp>& operator<<=(const valarray<_Tp>&);
442
443 /// Right shift elements of array by corresponding elements of @a v.
444 valarray<_Tp>& operator>>=(const valarray<_Tp>&);
445
446 template<class _Dom>
447 valarray<_Tp>& operator*=(const _Expr<_Dom, _Tp>&);
448 template<class _Dom>
449 valarray<_Tp>& operator/=(const _Expr<_Dom, _Tp>&);
450 template<class _Dom>
451 valarray<_Tp>& operator%=(const _Expr<_Dom, _Tp>&);
452 template<class _Dom>
453 valarray<_Tp>& operator+=(const _Expr<_Dom, _Tp>&);
454 template<class _Dom>
455 valarray<_Tp>& operator-=(const _Expr<_Dom, _Tp>&);
456 template<class _Dom>
457 valarray<_Tp>& operator^=(const _Expr<_Dom, _Tp>&);
458 template<class _Dom>
459 valarray<_Tp>& operator|=(const _Expr<_Dom, _Tp>&);
460 template<class _Dom>
461 valarray<_Tp>& operator&=(const _Expr<_Dom, _Tp>&);
462 template<class _Dom>
463 valarray<_Tp>& operator<<=(const _Expr<_Dom, _Tp>&);
464 template<class _Dom>
465 valarray<_Tp>& operator>>=(const _Expr<_Dom, _Tp>&);
466
467 // _lib.valarray.members_ member functions:
468#if __cplusplus >= 201103L
469 /// Swap.
470 void swap(valarray<_Tp>& __v) noexcept;
471#endif
472
473 /// Return the number of elements in array.
474 size_t size() const;
475
476 /**
477 * @brief Return the sum of all elements in the array.
478 *
479 * Accumulates the sum of all elements into a Tp using +=. The order
480 * of adding the elements is unspecified.
481 */
482 _Tp sum() const;
483
484 /// Return the minimum element using operator<().
485 _Tp min() const;
486
487 /// Return the maximum element using operator<().
488 _Tp max() const;
489
490 /**
491 * @brief Return a shifted array.
492 *
493 * A new valarray is constructed as a copy of this array with elements
494 * in shifted positions. For an element with index i, the new position
495 * is i - n. The new valarray has the same size as the current one.
496 * New elements without a value are set to 0. Elements whose new
497 * position is outside the bounds of the array are discarded.
498 *
499 * Positive arguments shift toward index 0, discarding elements [0, n).
500 * Negative arguments discard elements from the top of the array.
501 *
502 * @param __n Number of element positions to shift.
503 * @return New valarray with elements in shifted positions.
504 */
505 valarray<_Tp> shift (int __n) const;
506
507 /**
508 * @brief Return a rotated array.
509 *
510 * A new valarray is constructed as a copy of this array with elements
511 * in shifted positions. For an element with index i, the new position
512 * is (i - n) % size(). The new valarray has the same size as the
513 * current one. Elements that are shifted beyond the array bounds are
514 * shifted into the other end of the array. No elements are lost.
515 *
516 * Positive arguments shift toward index 0, wrapping around the top.
517 * Negative arguments shift towards the top, wrapping around to 0.
518 *
519 * @param __n Number of element positions to rotate.
520 * @return New valarray with elements in shifted positions.
521 */
522 valarray<_Tp> cshift(int __n) const;
523
524 /**
525 * @brief Apply a function to the array.
526 *
527 * Returns a new valarray with elements assigned to the result of
528 * applying func to the corresponding element of this array. The new
529 * array has the same size as this one.
530 *
531 * @param func Function of Tp returning Tp to apply.
532 * @return New valarray with transformed elements.
533 */
534 _Expr<_ValFunClos<_ValArray, _Tp>, _Tp> apply(_Tp func(_Tp)) const;
535
536 /**
537 * @brief Apply a function to the array.
538 *
539 * Returns a new valarray with elements assigned to the result of
540 * applying func to the corresponding element of this array. The new
541 * array has the same size as this one.
542 *
543 * @param func Function of const Tp& returning Tp to apply.
544 * @return New valarray with transformed elements.
545 */
546 _Expr<_RefFunClos<_ValArray, _Tp>, _Tp> apply(_Tp func(const _Tp&)) const;
547
548 /**
549 * @brief Resize array.
550 *
551 * Resize this array to @a size and set all elements to @a c. All
552 * references and iterators are invalidated.
553 *
554 * @param __size New array size.
555 * @param __c New value for all elements.
556 */
557 void resize(size_t __size, _Tp __c = _Tp());
558
559 private:
560 size_t _M_size;
561 _Tp* __restrict__ _M_data;
562
563 friend class _Array<_Tp>;
564 };
565
566#if __cpp_deduction_guides >= 201606
567 template<typename _Tp, size_t _Nm>
568 valarray(const _Tp(&)[_Nm], size_t) -> valarray<_Tp>;
569#endif
570
571 template<typename _Tp>
572 inline const _Tp&
573 valarray<_Tp>::operator[](size_t __i) const
574 {
575 __glibcxx_requires_subscript(__i);
576 return _M_data[__i];
577 }
578
579 template<typename _Tp>
580 inline _Tp&
581 valarray<_Tp>::operator[](size_t __i)
582 {
583 __glibcxx_requires_subscript(__i);
584 return _M_data[__i];
585 }
586
587 // @} group numeric_arrays
588
589_GLIBCXX_END_NAMESPACE_VERSION
590} // namespace
591
592#include <bits/valarray_after.h>
593#include <bits/slice_array.h>
594#include <bits/gslice.h>
595#include <bits/gslice_array.h>
596#include <bits/mask_array.h>
597#include <bits/indirect_array.h>
598
599namespace std _GLIBCXX_VISIBILITY(default)
600{
601_GLIBCXX_BEGIN_NAMESPACE_VERSION
602
603 /**
604 * @addtogroup numeric_arrays
605 * @{
606 */
607
608 template<typename _Tp>
609 inline
610 valarray<_Tp>::valarray() : _M_size(0), _M_data(0) {}
611
612 template<typename _Tp>
613 inline
614 valarray<_Tp>::valarray(size_t __n)
615 : _M_size(__n), _M_data(__valarray_get_storage<_Tp>(__n))
616 { std::__valarray_default_construct(_M_data, _M_data + __n); }
617
618 template<typename _Tp>
619 inline
620 valarray<_Tp>::valarray(const _Tp& __t, size_t __n)
621 : _M_size(__n), _M_data(__valarray_get_storage<_Tp>(__n))
622 { std::__valarray_fill_construct(_M_data, _M_data + __n, __t); }
623
624 template<typename _Tp>
625 inline
626 valarray<_Tp>::valarray(const _Tp* __restrict__ __p, size_t __n)
627 : _M_size(__n), _M_data(__valarray_get_storage<_Tp>(__n))
628 {
629 __glibcxx_assert(__p != 0 || __n == 0);
630 std::__valarray_copy_construct(__p, __p + __n, _M_data);
631 }
632
633 template<typename _Tp>
634 inline
635 valarray<_Tp>::valarray(const valarray<_Tp>& __v)
636 : _M_size(__v._M_size), _M_data(__valarray_get_storage<_Tp>(__v._M_size))
637 { std::__valarray_copy_construct(__v._M_data, __v._M_data + _M_size,
638 _M_data); }
639
640#if __cplusplus >= 201103L
641 template<typename _Tp>
642 inline
643 valarray<_Tp>::valarray(valarray<_Tp>&& __v) noexcept
644 : _M_size(__v._M_size), _M_data(__v._M_data)
645 {
646 __v._M_size = 0;
647 __v._M_data = 0;
648 }
649#endif
650
651 template<typename _Tp>
652 inline
653 valarray<_Tp>::valarray(const slice_array<_Tp>& __sa)
654 : _M_size(__sa._M_sz), _M_data(__valarray_get_storage<_Tp>(__sa._M_sz))
655 {
656 std::__valarray_copy_construct
657 (__sa._M_array, __sa._M_sz, __sa._M_stride, _Array<_Tp>(_M_data));
658 }
659
660 template<typename _Tp>
661 inline
662 valarray<_Tp>::valarray(const gslice_array<_Tp>& __ga)
663 : _M_size(__ga._M_index.size()),
664 _M_data(__valarray_get_storage<_Tp>(_M_size))
665 {
666 std::__valarray_copy_construct
667 (__ga._M_array, _Array<size_t>(__ga._M_index),
668 _Array<_Tp>(_M_data), _M_size);
669 }
670
671 template<typename _Tp>
672 inline
673 valarray<_Tp>::valarray(const mask_array<_Tp>& __ma)
674 : _M_size(__ma._M_sz), _M_data(__valarray_get_storage<_Tp>(__ma._M_sz))
675 {
676 std::__valarray_copy_construct
677 (__ma._M_array, __ma._M_mask, _Array<_Tp>(_M_data), _M_size);
678 }
679
680 template<typename _Tp>
681 inline
682 valarray<_Tp>::valarray(const indirect_array<_Tp>& __ia)
683 : _M_size(__ia._M_sz), _M_data(__valarray_get_storage<_Tp>(__ia._M_sz))
684 {
685 std::__valarray_copy_construct
686 (__ia._M_array, __ia._M_index, _Array<_Tp>(_M_data), _M_size);
687 }
688
689#if __cplusplus >= 201103L
690 template<typename _Tp>
691 inline
692 valarray<_Tp>::valarray(initializer_list<_Tp> __l)
693 : _M_size(__l.size()), _M_data(__valarray_get_storage<_Tp>(__l.size()))
694 { std::__valarray_copy_construct(__l.begin(), __l.end(), _M_data); }
695#endif
696
697 template<typename _Tp> template<class _Dom>
698 inline
699 valarray<_Tp>::valarray(const _Expr<_Dom, _Tp>& __e)
700 : _M_size(__e.size()), _M_data(__valarray_get_storage<_Tp>(_M_size))
701 { std::__valarray_copy_construct(__e, _M_size, _Array<_Tp>(_M_data)); }
702
703 template<typename _Tp>
704 inline
705 valarray<_Tp>::~valarray() _GLIBCXX_NOEXCEPT
706 {
707 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
708 std::__valarray_release_memory(_M_data);
709 }
710
711 template<typename _Tp>
712 inline valarray<_Tp>&
713 valarray<_Tp>::operator=(const valarray<_Tp>& __v)
714 {
715 // _GLIBCXX_RESOLVE_LIB_DEFECTS
716 // 630. arrays of valarray.
717 if (_M_size == __v._M_size)
718 std::__valarray_copy(__v._M_data, _M_size, _M_data);
719 else
720 {
721 if (_M_data)
722 {
723 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
724 std::__valarray_release_memory(_M_data);
725 }
726 _M_size = __v._M_size;
727 _M_data = __valarray_get_storage<_Tp>(_M_size);
728 std::__valarray_copy_construct(__v._M_data, __v._M_data + _M_size,
729 _M_data);
730 }
731 return *this;
732 }
733
734#if __cplusplus >= 201103L
735 template<typename _Tp>
736 inline valarray<_Tp>&
737 valarray<_Tp>::operator=(valarray<_Tp>&& __v) noexcept
738 {
739 if (_M_data)
740 {
741 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
742 std::__valarray_release_memory(_M_data);
743 }
744 _M_size = __v._M_size;
745 _M_data = __v._M_data;
746 __v._M_size = 0;
747 __v._M_data = 0;
748 return *this;
749 }
750
751 template<typename _Tp>
752 inline valarray<_Tp>&
753 valarray<_Tp>::operator=(initializer_list<_Tp> __l)
754 {
755 // _GLIBCXX_RESOLVE_LIB_DEFECTS
756 // 630. arrays of valarray.
757 if (_M_size == __l.size())
758 std::__valarray_copy(__l.begin(), __l.size(), _M_data);
759 else
760 {
761 if (_M_data)
762 {
763 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
764 std::__valarray_release_memory(_M_data);
765 }
766 _M_size = __l.size();
767 _M_data = __valarray_get_storage<_Tp>(_M_size);
768 std::__valarray_copy_construct(__l.begin(), __l.begin() + _M_size,
769 _M_data);
770 }
771 return *this;
772 }
773#endif
774
775 template<typename _Tp>
776 inline valarray<_Tp>&
777 valarray<_Tp>::operator=(const _Tp& __t)
778 {
779 std::__valarray_fill(_M_data, _M_size, __t);
780 return *this;
781 }
782
783 template<typename _Tp>
784 inline valarray<_Tp>&
785 valarray<_Tp>::operator=(const slice_array<_Tp>& __sa)
786 {
787 __glibcxx_assert(_M_size == __sa._M_sz);
788 std::__valarray_copy(__sa._M_array, __sa._M_sz,
789 __sa._M_stride, _Array<_Tp>(_M_data));
790 return *this;
791 }
792
793 template<typename _Tp>
794 inline valarray<_Tp>&
795 valarray<_Tp>::operator=(const gslice_array<_Tp>& __ga)
796 {
797 __glibcxx_assert(_M_size == __ga._M_index.size());
798 std::__valarray_copy(__ga._M_array, _Array<size_t>(__ga._M_index),
799 _Array<_Tp>(_M_data), _M_size);
800 return *this;
801 }
802
803 template<typename _Tp>
804 inline valarray<_Tp>&
805 valarray<_Tp>::operator=(const mask_array<_Tp>& __ma)
806 {
807 __glibcxx_assert(_M_size == __ma._M_sz);
808 std::__valarray_copy(__ma._M_array, __ma._M_mask,
809 _Array<_Tp>(_M_data), _M_size);
810 return *this;
811 }
812
813 template<typename _Tp>
814 inline valarray<_Tp>&
815 valarray<_Tp>::operator=(const indirect_array<_Tp>& __ia)
816 {
817 __glibcxx_assert(_M_size == __ia._M_sz);
818 std::__valarray_copy(__ia._M_array, __ia._M_index,
819 _Array<_Tp>(_M_data), _M_size);
820 return *this;
821 }
822
823 template<typename _Tp> template<class _Dom>
824 inline valarray<_Tp>&
825 valarray<_Tp>::operator=(const _Expr<_Dom, _Tp>& __e)
826 {
827 // _GLIBCXX_RESOLVE_LIB_DEFECTS
828 // 630. arrays of valarray.
829 if (_M_size == __e.size())
830 std::__valarray_copy(__e, _M_size, _Array<_Tp>(_M_data));
831 else
832 {
833 if (_M_data)
834 {
835 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
836 std::__valarray_release_memory(_M_data);
837 }
838 _M_size = __e.size();
839 _M_data = __valarray_get_storage<_Tp>(_M_size);
840 std::__valarray_copy_construct(__e, _M_size, _Array<_Tp>(_M_data));
841 }
842 return *this;
843 }
844
845 template<typename _Tp>
846 inline _Expr<_SClos<_ValArray,_Tp>, _Tp>
847 valarray<_Tp>::operator[](slice __s) const
848 {
849 typedef _SClos<_ValArray,_Tp> _Closure;
850 return _Expr<_Closure, _Tp>(_Closure (_Array<_Tp>(_M_data), __s));
851 }
852
853 template<typename _Tp>
854 inline slice_array<_Tp>
855 valarray<_Tp>::operator[](slice __s)
856 { return slice_array<_Tp>(_Array<_Tp>(_M_data), __s); }
857
858 template<typename _Tp>
859 inline _Expr<_GClos<_ValArray,_Tp>, _Tp>
860 valarray<_Tp>::operator[](const gslice& __gs) const
861 {
862 typedef _GClos<_ValArray,_Tp> _Closure;
863 return _Expr<_Closure, _Tp>
864 (_Closure(_Array<_Tp>(_M_data), __gs._M_index->_M_index));
865 }
866
867 template<typename _Tp>
868 inline gslice_array<_Tp>
869 valarray<_Tp>::operator[](const gslice& __gs)
870 {
871 return gslice_array<_Tp>
872 (_Array<_Tp>(_M_data), __gs._M_index->_M_index);
873 }
874
875 template<typename _Tp>
876 inline valarray<_Tp>
877 valarray<_Tp>::operator[](const valarray<bool>& __m) const
878 {
879 size_t __s = 0;
880 size_t __e = __m.size();
881 for (size_t __i=0; __i<__e; ++__i)
882 if (__m[__i]) ++__s;
883 return valarray<_Tp>(mask_array<_Tp>(_Array<_Tp>(_M_data), __s,
884 _Array<bool> (__m)));
885 }
886
887 template<typename _Tp>
888 inline mask_array<_Tp>
889 valarray<_Tp>::operator[](const valarray<bool>& __m)
890 {
891 size_t __s = 0;
892 size_t __e = __m.size();
893 for (size_t __i=0; __i<__e; ++__i)
894 if (__m[__i]) ++__s;
895 return mask_array<_Tp>(_Array<_Tp>(_M_data), __s, _Array<bool>(__m));
896 }
897
898 template<typename _Tp>
899 inline _Expr<_IClos<_ValArray,_Tp>, _Tp>
900 valarray<_Tp>::operator[](const valarray<size_t>& __i) const
901 {
902 typedef _IClos<_ValArray,_Tp> _Closure;
903 return _Expr<_Closure, _Tp>(_Closure(*this, __i));
904 }
905
906 template<typename _Tp>
907 inline indirect_array<_Tp>
908 valarray<_Tp>::operator[](const valarray<size_t>& __i)
909 {
910 return indirect_array<_Tp>(_Array<_Tp>(_M_data), __i.size(),
911 _Array<size_t>(__i));
912 }
913
914#if __cplusplus >= 201103L
915 template<class _Tp>
916 inline void
917 valarray<_Tp>::swap(valarray<_Tp>& __v) noexcept
918 {
919 std::swap(_M_size, __v._M_size);
920 std::swap(_M_data, __v._M_data);
921 }
922#endif
923
924 template<class _Tp>
925 inline size_t
926 valarray<_Tp>::size() const
927 { return _M_size; }
928
929 template<class _Tp>
930 inline _Tp
931 valarray<_Tp>::sum() const
932 {
933 __glibcxx_assert(_M_size > 0);
934 return std::__valarray_sum(_M_data, _M_data + _M_size);
935 }
936
937 template<class _Tp>
938 inline valarray<_Tp>
939 valarray<_Tp>::shift(int __n) const
940 {
941 valarray<_Tp> __ret;
942
943 if (_M_size == 0)
944 return __ret;
945
946 _Tp* __restrict__ __tmp_M_data =
947 std::__valarray_get_storage<_Tp>(_M_size);
948
949 if (__n == 0)
950 std::__valarray_copy_construct(_M_data,
951 _M_data + _M_size, __tmp_M_data);
952 else if (__n > 0) // shift left
953 {
954 if (size_t(__n) > _M_size)
955 __n = int(_M_size);
956
957 std::__valarray_copy_construct(_M_data + __n,
958 _M_data + _M_size, __tmp_M_data);
959 std::__valarray_default_construct(__tmp_M_data + _M_size - __n,
960 __tmp_M_data + _M_size);
961 }
962 else // shift right
963 {
964 if (-size_t(__n) > _M_size)
965 __n = -int(_M_size);
966
967 std::__valarray_copy_construct(_M_data, _M_data + _M_size + __n,
968 __tmp_M_data - __n);
969 std::__valarray_default_construct(__tmp_M_data,
970 __tmp_M_data - __n);
971 }
972
973 __ret._M_size = _M_size;
974 __ret._M_data = __tmp_M_data;
975 return __ret;
976 }
977
978 template<class _Tp>
979 inline valarray<_Tp>
980 valarray<_Tp>::cshift(int __n) const
981 {
982 valarray<_Tp> __ret;
983
984 if (_M_size == 0)
985 return __ret;
986
987 _Tp* __restrict__ __tmp_M_data =
988 std::__valarray_get_storage<_Tp>(_M_size);
989
990 if (__n == 0)
991 std::__valarray_copy_construct(_M_data,
992 _M_data + _M_size, __tmp_M_data);
993 else if (__n > 0) // cshift left
994 {
995 if (size_t(__n) > _M_size)
996 __n = int(__n % _M_size);
997
998 std::__valarray_copy_construct(_M_data, _M_data + __n,
999 __tmp_M_data + _M_size - __n);
1000 std::__valarray_copy_construct(_M_data + __n, _M_data + _M_size,
1001 __tmp_M_data);
1002 }
1003 else // cshift right
1004 {
1005 if (-size_t(__n) > _M_size)
1006 __n = -int(-size_t(__n) % _M_size);
1007
1008 std::__valarray_copy_construct(_M_data + _M_size + __n,
1009 _M_data + _M_size, __tmp_M_data);
1010 std::__valarray_copy_construct(_M_data, _M_data + _M_size + __n,
1011 __tmp_M_data - __n);
1012 }
1013
1014 __ret._M_size = _M_size;
1015 __ret._M_data = __tmp_M_data;
1016 return __ret;
1017 }
1018
1019 template<class _Tp>
1020 inline void
1021 valarray<_Tp>::resize(size_t __n, _Tp __c)
1022 {
1023 // This complication is so to make valarray<valarray<T> > work
1024 // even though it is not required by the standard. Nobody should
1025 // be saying valarray<valarray<T> > anyway. See the specs.
1026 std::__valarray_destroy_elements(_M_data, _M_data + _M_size);
1027 if (_M_size != __n)
1028 {
1029 std::__valarray_release_memory(_M_data);
1030 _M_size = __n;
1031 _M_data = __valarray_get_storage<_Tp>(__n);
1032 }
1033 std::__valarray_fill_construct(_M_data, _M_data + __n, __c);
1034 }
1035
1036 template<typename _Tp>
1037 inline _Tp
1038 valarray<_Tp>::min() const
1039 {
1040 __glibcxx_assert(_M_size > 0);
1041 return *std::min_element(_M_data, _M_data + _M_size);
1042 }
1043
1044 template<typename _Tp>
1045 inline _Tp
1046 valarray<_Tp>::max() const
1047 {
1048 __glibcxx_assert(_M_size > 0);
1049 return *std::max_element(_M_data, _M_data + _M_size);
1050 }
1051
1052 template<class _Tp>
1053 inline _Expr<_ValFunClos<_ValArray, _Tp>, _Tp>
1054 valarray<_Tp>::apply(_Tp func(_Tp)) const
1055 {
1056 typedef _ValFunClos<_ValArray, _Tp> _Closure;
1057 return _Expr<_Closure, _Tp>(_Closure(*this, func));
1058 }
1059
1060 template<class _Tp>
1061 inline _Expr<_RefFunClos<_ValArray, _Tp>, _Tp>
1062 valarray<_Tp>::apply(_Tp func(const _Tp &)) const
1063 {
1064 typedef _RefFunClos<_ValArray, _Tp> _Closure;
1065 return _Expr<_Closure, _Tp>(_Closure(*this, func));
1066 }
1067
1068#define _DEFINE_VALARRAY_UNARY_OPERATOR(_Op, _Name) \
1069 template<typename _Tp> \
1070 inline typename valarray<_Tp>::template _UnaryOp<_Name>::_Rt \
1071 valarray<_Tp>::operator _Op() const \
1072 { \
1073 typedef _UnClos<_Name, _ValArray, _Tp> _Closure; \
1074 typedef typename __fun<_Name, _Tp>::result_type _Rt; \
1075 return _Expr<_Closure, _Rt>(_Closure(*this)); \
1076 }
1077
1078 _DEFINE_VALARRAY_UNARY_OPERATOR(+, __unary_plus)
1079 _DEFINE_VALARRAY_UNARY_OPERATOR(-, __negate)
1080 _DEFINE_VALARRAY_UNARY_OPERATOR(~, __bitwise_not)
1081 _DEFINE_VALARRAY_UNARY_OPERATOR (!, __logical_not)
1082
1083#undef _DEFINE_VALARRAY_UNARY_OPERATOR
1084
1085#define _DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(_Op, _Name) \
1086 template<class _Tp> \
1087 inline valarray<_Tp>& \
1088 valarray<_Tp>::operator _Op##=(const _Tp &__t) \
1089 { \
1090 _Array_augmented_##_Name(_Array<_Tp>(_M_data), _M_size, __t); \
1091 return *this; \
1092 } \
1093 \
1094 template<class _Tp> \
1095 inline valarray<_Tp>& \
1096 valarray<_Tp>::operator _Op##=(const valarray<_Tp> &__v) \
1097 { \
1098 __glibcxx_assert(_M_size == __v._M_size); \
1099 _Array_augmented_##_Name(_Array<_Tp>(_M_data), _M_size, \
1100 _Array<_Tp>(__v._M_data)); \
1101 return *this; \
1102 }
1103
1104_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(+, __plus)
1105_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(-, __minus)
1106_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(*, __multiplies)
1107_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(/, __divides)
1108_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(%, __modulus)
1109_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(^, __bitwise_xor)
1110_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(&, __bitwise_and)
1111_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(|, __bitwise_or)
1112_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(<<, __shift_left)
1113_DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT(>>, __shift_right)
1114
1115#undef _DEFINE_VALARRAY_AUGMENTED_ASSIGNMENT
1116
1117#define _DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(_Op, _Name) \
1118 template<class _Tp> template<class _Dom> \
1119 inline valarray<_Tp>& \
1120 valarray<_Tp>::operator _Op##=(const _Expr<_Dom, _Tp>& __e) \
1121 { \
1122 _Array_augmented_##_Name(_Array<_Tp>(_M_data), __e, _M_size); \
1123 return *this; \
1124 }
1125
1126_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(+, __plus)
1127_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(-, __minus)
1128_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(*, __multiplies)
1129_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(/, __divides)
1130_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(%, __modulus)
1131_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(^, __bitwise_xor)
1132_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(&, __bitwise_and)
1133_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(|, __bitwise_or)
1134_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(<<, __shift_left)
1135_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(>>, __shift_right)
1136
1137#undef _DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT
1138
1139
1140#define _DEFINE_BINARY_OPERATOR(_Op, _Name) \
1141 template<typename _Tp> \
1142 inline _Expr<_BinClos<_Name, _ValArray, _ValArray, _Tp, _Tp>, \
1143 typename __fun<_Name, _Tp>::result_type> \
1144 operator _Op(const valarray<_Tp>& __v, const valarray<_Tp>& __w) \
1145 { \
1146 __glibcxx_assert(__v.size() == __w.size()); \
1147 typedef _BinClos<_Name, _ValArray, _ValArray, _Tp, _Tp> _Closure; \
1148 typedef typename __fun<_Name, _Tp>::result_type _Rt; \
1149 return _Expr<_Closure, _Rt>(_Closure(__v, __w)); \
1150 } \
1151 \
1152 template<typename _Tp> \
1153 inline _Expr<_BinClos<_Name, _ValArray,_Constant, _Tp, _Tp>, \
1154 typename __fun<_Name, _Tp>::result_type> \
1155 operator _Op(const valarray<_Tp>& __v, const _Tp& __t) \
1156 { \
1157 typedef _BinClos<_Name, _ValArray, _Constant, _Tp, _Tp> _Closure; \
1158 typedef typename __fun<_Name, _Tp>::result_type _Rt; \
1159 return _Expr<_Closure, _Rt>(_Closure(__v, __t)); \
1160 } \
1161 \
1162 template<typename _Tp> \
1163 inline _Expr<_BinClos<_Name, _Constant, _ValArray, _Tp, _Tp>, \
1164 typename __fun<_Name, _Tp>::result_type> \
1165 operator _Op(const _Tp& __t, const valarray<_Tp>& __v) \
1166 { \
1167 typedef _BinClos<_Name, _Constant, _ValArray, _Tp, _Tp> _Closure; \
1168 typedef typename __fun<_Name, _Tp>::result_type _Rt; \
1169 return _Expr<_Closure, _Rt>(_Closure(__t, __v)); \
1170 }
1171
1172_DEFINE_BINARY_OPERATOR(+, __plus)
1173_DEFINE_BINARY_OPERATOR(-, __minus)
1174_DEFINE_BINARY_OPERATOR(*, __multiplies)
1175_DEFINE_BINARY_OPERATOR(/, __divides)
1176_DEFINE_BINARY_OPERATOR(%, __modulus)
1177_DEFINE_BINARY_OPERATOR(^, __bitwise_xor)
1178_DEFINE_BINARY_OPERATOR(&, __bitwise_and)
1179_DEFINE_BINARY_OPERATOR(|, __bitwise_or)
1180_DEFINE_BINARY_OPERATOR(<<, __shift_left)
1181_DEFINE_BINARY_OPERATOR(>>, __shift_right)
1182_DEFINE_BINARY_OPERATOR(&&, __logical_and)
1183_DEFINE_BINARY_OPERATOR(||, __logical_or)
1184_DEFINE_BINARY_OPERATOR(==, __equal_to)
1185_DEFINE_BINARY_OPERATOR(!=, __not_equal_to)
1186_DEFINE_BINARY_OPERATOR(<, __less)
1187_DEFINE_BINARY_OPERATOR(>, __greater)
1188_DEFINE_BINARY_OPERATOR(<=, __less_equal)
1189_DEFINE_BINARY_OPERATOR(>=, __greater_equal)
1190
1191#undef _DEFINE_BINARY_OPERATOR
1192
1193#if __cplusplus >= 201103L
1194 /**
1195 * @brief Return an iterator pointing to the first element of
1196 * the valarray.
1197 * @param __va valarray.
1198 */
1199 template<class _Tp>
1200 inline _Tp*
1201 begin(valarray<_Tp>& __va)
1202 { return std::__addressof(__va[0]); }
1203
1204 /**
1205 * @brief Return an iterator pointing to the first element of
1206 * the const valarray.
1207 * @param __va valarray.
1208 */
1209 template<class _Tp>
1210 inline const _Tp*
1211 begin(const valarray<_Tp>& __va)
1212 { return std::__addressof(__va[0]); }
1213
1214 /**
1215 * @brief Return an iterator pointing to one past the last element of
1216 * the valarray.
1217 * @param __va valarray.
1218 */
1219 template<class _Tp>
1220 inline _Tp*
1221 end(valarray<_Tp>& __va)
1222 { return std::__addressof(__va[0]) + __va.size(); }
1223
1224 /**
1225 * @brief Return an iterator pointing to one past the last element of
1226 * the const valarray.
1227 * @param __va valarray.
1228 */
1229 template<class _Tp>
1230 inline const _Tp*
1231 end(const valarray<_Tp>& __va)
1232 { return std::__addressof(__va[0]) + __va.size(); }
1233#endif // C++11
1234
1235 // @} group numeric_arrays
1236
1237_GLIBCXX_END_NAMESPACE_VERSION
1238} // namespace
1239
1240#endif /* _GLIBCXX_VALARRAY */
1241

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