1// The template and inlines for the -*- C++ -*- internal _Meta class. 2 3// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 4// 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. 5// 6// This file is part of the GNU ISO C++ Library. This library is free 7// software; you can redistribute it and/or modify it under the 8// terms of the GNU General Public License as published by the 9// Free Software Foundation; either version 3, or (at your option) 10// any later version. 11 12// This library is distributed in the hope that it will be useful, 13// but WITHOUT ANY WARRANTY; without even the implied warranty of 14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15// GNU General Public License for more details. 16 17// Under Section 7 of GPL version 3, you are granted additional 18// permissions described in the GCC Runtime Library Exception, version 19// 3.1, as published by the Free Software Foundation. 20 21// You should have received a copy of the GNU General Public License and 22// a copy of the GCC Runtime Library Exception along with this program; 23// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24// <http://www.gnu.org/licenses/>. 25 26/** @file bits/valarray_after.h 27 * This is an internal header file, included by other library headers. 28 * Do not attempt to use it directly. @headername{valarray} 29 */ 30 31// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@cmla.ens-cachan.fr> 32 33#ifndef _VALARRAY_AFTER_H 34#define _VALARRAY_AFTER_H 1 35 36#pragma GCC system_header 37 38namespace std _GLIBCXX_VISIBILITY(default) 39{ 40_GLIBCXX_BEGIN_NAMESPACE_VERSION 41 42 // 43 // gslice_array closure. 44 // 45 template<class _Dom> 46 class _GBase 47 { 48 public: 49 typedef typename _Dom::value_type value_type; 50 51 _GBase (const _Dom& __e, const valarray<size_t>& __i) 52 : _M_expr (__e), _M_index(__i) {} 53 54 value_type 55 operator[] (size_t __i) const 56 { return _M_expr[_M_index[__i]]; } 57 58 size_t 59 size () const 60 { return _M_index.size(); } 61 62 private: 63 const _Dom& _M_expr; 64 const valarray<size_t>& _M_index; 65 }; 66 67 template<typename _Tp> 68 class _GBase<_Array<_Tp> > 69 { 70 public: 71 typedef _Tp value_type; 72 73 _GBase (_Array<_Tp> __a, const valarray<size_t>& __i) 74 : _M_array (__a), _M_index(__i) {} 75 76 value_type 77 operator[] (size_t __i) const 78 { return _M_array._M_data[_M_index[__i]]; } 79 80 size_t 81 size () const 82 { return _M_index.size(); } 83 84 private: 85 const _Array<_Tp> _M_array; 86 const valarray<size_t>& _M_index; 87 }; 88 89 template<class _Dom> 90 struct _GClos<_Expr, _Dom> 91 : _GBase<_Dom> 92 { 93 typedef _GBase<_Dom> _Base; 94 typedef typename _Base::value_type value_type; 95 96 _GClos (const _Dom& __e, const valarray<size_t>& __i) 97 : _Base (__e, __i) {} 98 }; 99 100 template<typename _Tp> 101 struct _GClos<_ValArray, _Tp> 102 : _GBase<_Array<_Tp> > 103 { 104 typedef _GBase<_Array<_Tp> > _Base; 105 typedef typename _Base::value_type value_type; 106 107 _GClos (_Array<_Tp> __a, const valarray<size_t>& __i) 108 : _Base (__a, __i) {} 109 }; 110 111 // 112 // indirect_array closure 113 // 114 template<class _Dom> 115 class _IBase 116 { 117 public: 118 typedef typename _Dom::value_type value_type; 119 120 _IBase (const _Dom& __e, const valarray<size_t>& __i) 121 : _M_expr (__e), _M_index (__i) {} 122 123 value_type 124 operator[] (size_t __i) const 125 { return _M_expr[_M_index[__i]]; } 126 127 size_t 128 size() const 129 { return _M_index.size(); } 130 131 private: 132 const _Dom& _M_expr; 133 const valarray<size_t>& _M_index; 134 }; 135 136 template<class _Dom> 137 struct _IClos<_Expr, _Dom> 138 : _IBase<_Dom> 139 { 140 typedef _IBase<_Dom> _Base; 141 typedef typename _Base::value_type value_type; 142 143 _IClos (const _Dom& __e, const valarray<size_t>& __i) 144 : _Base (__e, __i) {} 145 }; 146 147 template<typename _Tp> 148 struct _IClos<_ValArray, _Tp> 149 : _IBase<valarray<_Tp> > 150 { 151 typedef _IBase<valarray<_Tp> > _Base; 152 typedef _Tp value_type; 153 154 _IClos (const valarray<_Tp>& __a, const valarray<size_t>& __i) 155 : _Base (__a, __i) {} 156 }; 157 158 // 159 // class _Expr 160 // 161 template<class _Clos, typename _Tp> 162 class _Expr 163 { 164 public: 165 typedef _Tp value_type; 166 167 _Expr(const _Clos&); 168 169 const _Clos& operator()() const; 170 171 value_type operator[](size_t) const; 172 valarray<value_type> operator[](slice) const; 173 valarray<value_type> operator[](const gslice&) const; 174 valarray<value_type> operator[](const valarray<bool>&) const; 175 valarray<value_type> operator[](const valarray<size_t>&) const; 176 177 _Expr<_UnClos<__unary_plus, std::_Expr, _Clos>, value_type> 178 operator+() const; 179 180 _Expr<_UnClos<__negate, std::_Expr, _Clos>, value_type> 181 operator-() const; 182 183 _Expr<_UnClos<__bitwise_not, std::_Expr, _Clos>, value_type> 184 operator~() const; 185 186 _Expr<_UnClos<__logical_not, std::_Expr, _Clos>, bool> 187 operator!() const; 188 189 size_t size() const; 190 value_type sum() const; 191 192 valarray<value_type> shift(int) const; 193 valarray<value_type> cshift(int) const; 194 195 value_type min() const; 196 value_type max() const; 197 198 valarray<value_type> apply(value_type (*)(const value_type&)) const; 199 valarray<value_type> apply(value_type (*)(value_type)) const; 200 201 private: 202 const _Clos _M_closure; 203 }; 204 205 template<class _Clos, typename _Tp> 206 inline 207 _Expr<_Clos, _Tp>::_Expr(const _Clos& __c) : _M_closure(__c) {} 208 209 template<class _Clos, typename _Tp> 210 inline const _Clos& 211 _Expr<_Clos, _Tp>::operator()() const 212 { return _M_closure; } 213 214 template<class _Clos, typename _Tp> 215 inline _Tp 216 _Expr<_Clos, _Tp>::operator[](size_t __i) const 217 { return _M_closure[__i]; } 218 219 template<class _Clos, typename _Tp> 220 inline valarray<_Tp> 221 _Expr<_Clos, _Tp>::operator[](slice __s) const 222 { 223 valarray<_Tp> __v = valarray<_Tp>(*this)[__s]; 224 return __v; 225 } 226 227 template<class _Clos, typename _Tp> 228 inline valarray<_Tp> 229 _Expr<_Clos, _Tp>::operator[](const gslice& __gs) const 230 { 231 valarray<_Tp> __v = valarray<_Tp>(*this)[__gs]; 232 return __v; 233 } 234 235 template<class _Clos, typename _Tp> 236 inline valarray<_Tp> 237 _Expr<_Clos, _Tp>::operator[](const valarray<bool>& __m) const 238 { 239 valarray<_Tp> __v = valarray<_Tp>(*this)[__m]; 240 return __v; 241 } 242 243 template<class _Clos, typename _Tp> 244 inline valarray<_Tp> 245 _Expr<_Clos, _Tp>::operator[](const valarray<size_t>& __i) const 246 { 247 valarray<_Tp> __v = valarray<_Tp>(*this)[__i]; 248 return __v; 249 } 250 251 template<class _Clos, typename _Tp> 252 inline size_t 253 _Expr<_Clos, _Tp>::size() const 254 { return _M_closure.size(); } 255 256 template<class _Clos, typename _Tp> 257 inline valarray<_Tp> 258 _Expr<_Clos, _Tp>::shift(int __n) const 259 { 260 valarray<_Tp> __v = valarray<_Tp>(*this).shift(__n); 261 return __v; 262 } 263 264 template<class _Clos, typename _Tp> 265 inline valarray<_Tp> 266 _Expr<_Clos, _Tp>::cshift(int __n) const 267 { 268 valarray<_Tp> __v = valarray<_Tp>(*this).cshift(__n); 269 return __v; 270 } 271 272 template<class _Clos, typename _Tp> 273 inline valarray<_Tp> 274 _Expr<_Clos, _Tp>::apply(_Tp __f(const _Tp&)) const 275 { 276 valarray<_Tp> __v = valarray<_Tp>(*this).apply(__f); 277 return __v; 278 } 279 280 template<class _Clos, typename _Tp> 281 inline valarray<_Tp> 282 _Expr<_Clos, _Tp>::apply(_Tp __f(_Tp)) const 283 { 284 valarray<_Tp> __v = valarray<_Tp>(*this).apply(__f); 285 return __v; 286 } 287 288 // XXX: replace this with a more robust summation algorithm. 289 template<class _Clos, typename _Tp> 290 inline _Tp 291 _Expr<_Clos, _Tp>::sum() const 292 { 293 size_t __n = _M_closure.size(); 294 if (__n == 0) 295 return _Tp(); 296 else 297 { 298 _Tp __s = _M_closure[--__n]; 299 while (__n != 0) 300 __s += _M_closure[--__n]; 301 return __s; 302 } 303 } 304 305 template<class _Clos, typename _Tp> 306 inline _Tp 307 _Expr<_Clos, _Tp>::min() const 308 { return __valarray_min(_M_closure); } 309 310 template<class _Clos, typename _Tp> 311 inline _Tp 312 _Expr<_Clos, _Tp>::max() const 313 { return __valarray_max(_M_closure); } 314 315 template<class _Dom, typename _Tp> 316 inline _Expr<_UnClos<__logical_not, _Expr, _Dom>, bool> 317 _Expr<_Dom, _Tp>::operator!() const 318 { 319 typedef _UnClos<__logical_not, std::_Expr, _Dom> _Closure; 320 return _Expr<_Closure, bool>(_Closure(this->_M_closure)); 321 } 322 323#define _DEFINE_EXPR_UNARY_OPERATOR(_Op, _Name) \ 324 template<class _Dom, typename _Tp> \ 325 inline _Expr<_UnClos<_Name, std::_Expr, _Dom>, _Tp> \ 326 _Expr<_Dom, _Tp>::operator _Op() const \ 327 { \ 328 typedef _UnClos<_Name, std::_Expr, _Dom> _Closure; \ 329 return _Expr<_Closure, _Tp>(_Closure(this->_M_closure)); \ 330 } 331 332 _DEFINE_EXPR_UNARY_OPERATOR(+, __unary_plus) 333 _DEFINE_EXPR_UNARY_OPERATOR(-, __negate) 334 _DEFINE_EXPR_UNARY_OPERATOR(~, __bitwise_not) 335 336#undef _DEFINE_EXPR_UNARY_OPERATOR 337 338#define _DEFINE_EXPR_BINARY_OPERATOR(_Op, _Name) \ 339 template<class _Dom1, class _Dom2> \ 340 inline _Expr<_BinClos<_Name, _Expr, _Expr, _Dom1, _Dom2>, \ 341 typename __fun<_Name, typename _Dom1::value_type>::result_type> \ 342 operator _Op(const _Expr<_Dom1, typename _Dom1::value_type>& __v, \ 343 const _Expr<_Dom2, typename _Dom2::value_type>& __w) \ 344 { \ 345 typedef typename _Dom1::value_type _Arg; \ 346 typedef typename __fun<_Name, _Arg>::result_type _Value; \ 347 typedef _BinClos<_Name, _Expr, _Expr, _Dom1, _Dom2> _Closure; \ 348 return _Expr<_Closure, _Value>(_Closure(__v(), __w())); \ 349 } \ 350 \ 351 template<class _Dom> \ 352 inline _Expr<_BinClos<_Name, _Expr, _Constant, _Dom, \ 353 typename _Dom::value_type>, \ 354 typename __fun<_Name, typename _Dom::value_type>::result_type> \ 355 operator _Op(const _Expr<_Dom, typename _Dom::value_type>& __v, \ 356 const typename _Dom::value_type& __t) \ 357 { \ 358 typedef typename _Dom::value_type _Arg; \ 359 typedef typename __fun<_Name, _Arg>::result_type _Value; \ 360 typedef _BinClos<_Name, _Expr, _Constant, _Dom, _Arg> _Closure; \ 361 return _Expr<_Closure, _Value>(_Closure(__v(), __t)); \ 362 } \ 363 \ 364 template<class _Dom> \ 365 inline _Expr<_BinClos<_Name, _Constant, _Expr, \ 366 typename _Dom::value_type, _Dom>, \ 367 typename __fun<_Name, typename _Dom::value_type>::result_type> \ 368 operator _Op(const typename _Dom::value_type& __t, \ 369 const _Expr<_Dom, typename _Dom::value_type>& __v) \ 370 { \ 371 typedef typename _Dom::value_type _Arg; \ 372 typedef typename __fun<_Name, _Arg>::result_type _Value; \ 373 typedef _BinClos<_Name, _Constant, _Expr, _Arg, _Dom> _Closure; \ 374 return _Expr<_Closure, _Value>(_Closure(__t, __v())); \ 375 } \ 376 \ 377 template<class _Dom> \ 378 inline _Expr<_BinClos<_Name, _Expr, _ValArray, \ 379 _Dom, typename _Dom::value_type>, \ 380 typename __fun<_Name, typename _Dom::value_type>::result_type> \ 381 operator _Op(const _Expr<_Dom,typename _Dom::value_type>& __e, \ 382 const valarray<typename _Dom::value_type>& __v) \ 383 { \ 384 typedef typename _Dom::value_type _Arg; \ 385 typedef typename __fun<_Name, _Arg>::result_type _Value; \ 386 typedef _BinClos<_Name, _Expr, _ValArray, _Dom, _Arg> _Closure; \ 387 return _Expr<_Closure, _Value>(_Closure(__e(), __v)); \ 388 } \ 389 \ 390 template<class _Dom> \ 391 inline _Expr<_BinClos<_Name, _ValArray, _Expr, \ 392 typename _Dom::value_type, _Dom>, \ 393 typename __fun<_Name, typename _Dom::value_type>::result_type> \ 394 operator _Op(const valarray<typename _Dom::value_type>& __v, \ 395 const _Expr<_Dom, typename _Dom::value_type>& __e) \ 396 { \ 397 typedef typename _Dom::value_type _Tp; \ 398 typedef typename __fun<_Name, _Tp>::result_type _Value; \ 399 typedef _BinClos<_Name, _ValArray, _Expr, _Tp, _Dom> _Closure; \ 400 return _Expr<_Closure, _Value>(_Closure(__v, __e ())); \ 401 } 402 403 _DEFINE_EXPR_BINARY_OPERATOR(+, __plus) 404 _DEFINE_EXPR_BINARY_OPERATOR(-, __minus) 405 _DEFINE_EXPR_BINARY_OPERATOR(*, __multiplies) 406 _DEFINE_EXPR_BINARY_OPERATOR(/, __divides) 407 _DEFINE_EXPR_BINARY_OPERATOR(%, __modulus) 408 _DEFINE_EXPR_BINARY_OPERATOR(^, __bitwise_xor) 409 _DEFINE_EXPR_BINARY_OPERATOR(&, __bitwise_and) 410 _DEFINE_EXPR_BINARY_OPERATOR(|, __bitwise_or) 411 _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left) 412 _DEFINE_EXPR_BINARY_OPERATOR(>>, __shift_right) 413 _DEFINE_EXPR_BINARY_OPERATOR(&&, __logical_and) 414 _DEFINE_EXPR_BINARY_OPERATOR(||, __logical_or) 415 _DEFINE_EXPR_BINARY_OPERATOR(==, __equal_to) 416 _DEFINE_EXPR_BINARY_OPERATOR(!=, __not_equal_to) 417 _DEFINE_EXPR_BINARY_OPERATOR(<, __less) 418 _DEFINE_EXPR_BINARY_OPERATOR(>, __greater) 419 _DEFINE_EXPR_BINARY_OPERATOR(<=, __less_equal) 420 _DEFINE_EXPR_BINARY_OPERATOR(>=, __greater_equal) 421 422#undef _DEFINE_EXPR_BINARY_OPERATOR 423 424#define _DEFINE_EXPR_UNARY_FUNCTION(_Name, _UName) \ 425 template<class _Dom> \ 426 inline _Expr<_UnClos<_UName, _Expr, _Dom>, \ 427 typename _Dom::value_type> \ 428 _Name(const _Expr<_Dom, typename _Dom::value_type>& __e) \ 429 { \ 430 typedef typename _Dom::value_type _Tp; \ 431 typedef _UnClos<_UName, _Expr, _Dom> _Closure; \ 432 return _Expr<_Closure, _Tp>(_Closure(__e())); \ 433 } \ 434 \ 435 template<typename _Tp> \ 436 inline _Expr<_UnClos<_UName, _ValArray, _Tp>, _Tp> \ 437 _Name(const valarray<_Tp>& __v) \ 438 { \ 439 typedef _UnClos<_UName, _ValArray, _Tp> _Closure; \ 440 return _Expr<_Closure, _Tp>(_Closure(__v)); \ 441 } 442 443 _DEFINE_EXPR_UNARY_FUNCTION(abs, _Abs) 444 _DEFINE_EXPR_UNARY_FUNCTION(cos, _Cos) 445 _DEFINE_EXPR_UNARY_FUNCTION(acos, _Acos) 446 _DEFINE_EXPR_UNARY_FUNCTION(cosh, _Cosh) 447 _DEFINE_EXPR_UNARY_FUNCTION(sin, _Sin) 448 _DEFINE_EXPR_UNARY_FUNCTION(asin, _Asin) 449 _DEFINE_EXPR_UNARY_FUNCTION(sinh, _Sinh) 450 _DEFINE_EXPR_UNARY_FUNCTION(tan, _Tan) 451 _DEFINE_EXPR_UNARY_FUNCTION(tanh, _Tanh) 452 _DEFINE_EXPR_UNARY_FUNCTION(atan, _Atan) 453 _DEFINE_EXPR_UNARY_FUNCTION(exp, _Exp) 454 _DEFINE_EXPR_UNARY_FUNCTION(log, _Log) 455 _DEFINE_EXPR_UNARY_FUNCTION(log10, _Log10) 456 _DEFINE_EXPR_UNARY_FUNCTION(sqrt, _Sqrt) 457 458#undef _DEFINE_EXPR_UNARY_FUNCTION 459 460#define _DEFINE_EXPR_BINARY_FUNCTION(_Fun, _UFun) \ 461 template<class _Dom1, class _Dom2> \ 462 inline _Expr<_BinClos<_UFun, _Expr, _Expr, _Dom1, _Dom2>, \ 463 typename _Dom1::value_type> \ 464 _Fun(const _Expr<_Dom1, typename _Dom1::value_type>& __e1, \ 465 const _Expr<_Dom2, typename _Dom2::value_type>& __e2) \ 466 { \ 467 typedef typename _Dom1::value_type _Tp; \ 468 typedef _BinClos<_UFun, _Expr, _Expr, _Dom1, _Dom2> _Closure; \ 469 return _Expr<_Closure, _Tp>(_Closure(__e1(), __e2())); \ 470 } \ 471 \ 472 template<class _Dom> \ 473 inline _Expr<_BinClos<_UFun, _Expr, _ValArray, _Dom, \ 474 typename _Dom::value_type>, \ 475 typename _Dom::value_type> \ 476 _Fun(const _Expr<_Dom, typename _Dom::value_type>& __e, \ 477 const valarray<typename _Dom::value_type>& __v) \ 478 { \ 479 typedef typename _Dom::value_type _Tp; \ 480 typedef _BinClos<_UFun, _Expr, _ValArray, _Dom, _Tp> _Closure; \ 481 return _Expr<_Closure, _Tp>(_Closure(__e(), __v)); \ 482 } \ 483 \ 484 template<class _Dom> \ 485 inline _Expr<_BinClos<_UFun, _ValArray, _Expr, \ 486 typename _Dom::value_type, _Dom>, \ 487 typename _Dom::value_type> \ 488 _Fun(const valarray<typename _Dom::valarray>& __v, \ 489 const _Expr<_Dom, typename _Dom::value_type>& __e) \ 490 { \ 491 typedef typename _Dom::value_type _Tp; \ 492 typedef _BinClos<_UFun, _ValArray, _Expr, _Tp, _Dom> _Closure; \ 493 return _Expr<_Closure, _Tp>(_Closure(__v, __e())); \ 494 } \ 495 \ 496 template<class _Dom> \ 497 inline _Expr<_BinClos<_UFun, _Expr, _Constant, _Dom, \ 498 typename _Dom::value_type>, \ 499 typename _Dom::value_type> \ 500 _Fun(const _Expr<_Dom, typename _Dom::value_type>& __e, \ 501 const typename _Dom::value_type& __t) \ 502 { \ 503 typedef typename _Dom::value_type _Tp; \ 504 typedef _BinClos<_UFun, _Expr, _Constant, _Dom, _Tp> _Closure; \ 505 return _Expr<_Closure, _Tp>(_Closure(__e(), __t)); \ 506 } \ 507 \ 508 template<class _Dom> \ 509 inline _Expr<_BinClos<_UFun, _Constant, _Expr, \ 510 typename _Dom::value_type, _Dom>, \ 511 typename _Dom::value_type> \ 512 _Fun(const typename _Dom::value_type& __t, \ 513 const _Expr<_Dom, typename _Dom::value_type>& __e) \ 514 { \ 515 typedef typename _Dom::value_type _Tp; \ 516 typedef _BinClos<_UFun, _Constant, _Expr, _Tp, _Dom> _Closure; \ 517 return _Expr<_Closure, _Tp>(_Closure(__t, __e())); \ 518 } \ 519 \ 520 template<typename _Tp> \ 521 inline _Expr<_BinClos<_UFun, _ValArray, _ValArray, _Tp, _Tp>, _Tp> \ 522 _Fun(const valarray<_Tp>& __v, const valarray<_Tp>& __w) \ 523 { \ 524 typedef _BinClos<_UFun, _ValArray, _ValArray, _Tp, _Tp> _Closure;\ 525 return _Expr<_Closure, _Tp>(_Closure(__v, __w)); \ 526 } \ 527 \ 528 template<typename _Tp> \ 529 inline _Expr<_BinClos<_UFun, _ValArray, _Constant, _Tp, _Tp>, _Tp> \ 530 _Fun(const valarray<_Tp>& __v, const _Tp& __t) \ 531 { \ 532 typedef _BinClos<_UFun, _ValArray, _Constant, _Tp, _Tp> _Closure;\ 533 return _Expr<_Closure, _Tp>(_Closure(__v, __t)); \ 534 } \ 535 \ 536 template<typename _Tp> \ 537 inline _Expr<_BinClos<_UFun, _Constant, _ValArray, _Tp, _Tp>, _Tp> \ 538 _Fun(const _Tp& __t, const valarray<_Tp>& __v) \ 539 { \ 540 typedef _BinClos<_UFun, _Constant, _ValArray, _Tp, _Tp> _Closure;\ 541 return _Expr<_Closure, _Tp>(_Closure(__t, __v)); \ 542 } 543 544_DEFINE_EXPR_BINARY_FUNCTION(atan2, _Atan2) 545_DEFINE_EXPR_BINARY_FUNCTION(pow, _Pow) 546 547#undef _DEFINE_EXPR_BINARY_FUNCTION 548 549_GLIBCXX_END_NAMESPACE_VERSION 550} // namespace 551 552#endif /* _CPP_VALARRAY_AFTER_H */ 553