libstdc++/stl/stl_function.h

   1 /*
   2  *
   3  * Copyright (c) 1994
   4  * Hewlett-Packard Company
   5  *
   6  * Permission to use, copy, modify, distribute and sell this software
   7  * and its documentation for any purpose is hereby granted without fee,
   8  * provided that the above copyright notice appear in all copies and
   9  * that both that copyright notice and this permission notice appear
  10  * in supporting documentation.  Hewlett-Packard Company makes no
  11  * representations about the suitability of this software for any
  12  * purpose.  It is provided "as is" without express or implied warranty.
  13  *
  14  *
  15  * Copyright (c) 1996-1998
  16  * Silicon Graphics Computer Systems, Inc.
  17  *
  18  * Permission to use, copy, modify, distribute and sell this software
  19  * and its documentation for any purpose is hereby granted without fee,
  20  * provided that the above copyright notice appear in all copies and
  21  * that both that copyright notice and this permission notice appear
  22  * in supporting documentation.  Silicon Graphics makes no
  23  * representations about the suitability of this software for any
  24  * purpose.  It is provided "as is" without express or implied warranty.
  25  */
  26
  27 /* NOTE: This is an internal header file, included by other STL headers.
  28  *   You should not attempt to use it directly.
  29  */
  30
  31 #ifndef __SGI_STL_INTERNAL_FUNCTION_H
  32 #define __SGI_STL_INTERNAL_FUNCTION_H
  33
  34 __STL_BEGIN_NAMESPACE
  35
  36 template <class _Arg, class _Result>
  37 struct unary_function {
  38   typedef _Arg argument_type;
  39   typedef _Result result_type;
  40 };
  41
  42 template <class _Arg1, class _Arg2, class _Result>
  43 struct binary_function {
  44   typedef _Arg1 first_argument_type;
  45   typedef _Arg2 second_argument_type;
  46   typedef _Result result_type;
  47 };
  48
  49 template <class _Tp>
  50 struct plus : public binary_function<_Tp,_Tp,_Tp> {
  51   _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x + __y; }
  52 };
  53
  54 template <class _Tp>
  55 struct minus : public binary_function<_Tp,_Tp,_Tp> {
  56   _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x - __y; }
  57 };
  58
  59 template <class _Tp>
  60 struct multiplies : public binary_function<_Tp,_Tp,_Tp> {
  61   _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x * __y; }
  62 };
  63
  64 template <class _Tp>
  65 struct divides : public binary_function<_Tp,_Tp,_Tp> {
  66   _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x / __y; }
  67 };
  68
  69 // identity_element (not part of the C++ standard).
  70
  71 template <class _Tp> inline _Tp identity_element(plus<_Tp>) {
  72   return _Tp(0);
  73 }
  74 template <class _Tp> inline _Tp identity_element(multiplies<_Tp>) {
  75   return _Tp(1);
  76 }
  77
  78 template <class _Tp>
  79 struct modulus : public binary_function<_Tp,_Tp,_Tp>
  80 {
  81   _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x % __y; }
  82 };
  83
  84 template <class _Tp>
  85 struct negate : public unary_function<_Tp,_Tp>
  86 {
  87   _Tp operator()(const _Tp& __x) const { return -__x; }
  88 };
  89
  90 template <class _Tp>
  91 struct equal_to : public binary_function<_Tp,_Tp,bool>
  92 {
  93   bool operator()(const _Tp& __x, const _Tp& __y) const { return __x == __y; }
  94 };
  95
  96 template <class _Tp>
  97 struct not_equal_to : public binary_function<_Tp,_Tp,bool>
  98 {
  99   bool operator()(const _Tp& __x, const _Tp& __y) const { return __x != __y; }
 100 };
 101
 102 template <class _Tp>
 103 struct greater : public binary_function<_Tp,_Tp,bool>
 104 {
 105   bool operator()(const _Tp& __x, const _Tp& __y) const { return __x > __y; }
 106 };
 107
 108 template <class _Tp>
 109 struct less : public binary_function<_Tp,_Tp,bool>
 110 {
 111   bool operator()(const _Tp& __x, const _Tp& __y) const { return __x < __y; }
 112 };
 113
 114 template <class _Tp>
 115 struct greater_equal : public binary_function<_Tp,_Tp,bool>
 116 {
 117   bool operator()(const _Tp& __x, const _Tp& __y) const { return __x >= __y; }
 118 };
 119
 120 template <class _Tp>
 121 struct less_equal : public binary_function<_Tp,_Tp,bool>
 122 {
 123   bool operator()(const _Tp& __x, const _Tp& __y) const { return __x <= __y; }
 124 };
 125
 126 template <class _Tp>
 127 struct logical_and : public binary_function<_Tp,_Tp,bool>
 128 {
 129   bool operator()(const _Tp& __x, const _Tp& __y) const { return __x && __y; }
 130 };
 131
 132 template <class _Tp>
 133 struct logical_or : public binary_function<_Tp,_Tp,bool>
 134 {
 135   bool operator()(const _Tp& __x, const _Tp& __y) const { return __x || __y; }
 136 };
 137
 138 template <class _Tp>
 139 struct logical_not : public unary_function<_Tp,bool>
 140 {
 141   bool operator()(const _Tp& __x) const { return !__x; }
 142 };
 143
 144 template <class _Predicate>
 145 class unary_negate
 146   : public unary_function<typename _Predicate::argument_type, bool> {
 147 protected:
 148   _Predicate _M_pred;
 149 public:
 150   explicit unary_negate(const _Predicate& __x) : _M_pred(__x) {}
 151   bool operator()(const typename _Predicate::argument_type& __x) const {
 152     return !_M_pred(__x);
 153   }
 154 };
 155
 156 template <class _Predicate>
 157 inline unary_negate<_Predicate>
 158 not1(const _Predicate& __pred)
 159 {
 160   return unary_negate<_Predicate>(__pred);
 161 }
 162
 163 template <class _Predicate>
 164 class binary_negate
 165   : public binary_function<typename _Predicate::first_argument_type,
 166                            typename _Predicate::second_argument_type,
 167                            bool> {
 168 protected:
 169   _Predicate _M_pred;
 170 public:
 171   explicit binary_negate(const _Predicate& __x) : _M_pred(__x) {}
 172   bool operator()(const typename _Predicate::first_argument_type& __x,
 173                   const typename _Predicate::second_argument_type& __y) const
 174   {
 175     return !_M_pred(__x, __y);
 176   }
 177 };
 178
 179 template <class _Predicate>
 180 inline binary_negate<_Predicate>
 181 not2(const _Predicate& __pred)
 182 {
 183   return binary_negate<_Predicate>(__pred);
 184 }
 185
 186 template <class _Operation>
 187 class binder1st
 188   : public unary_function<typename _Operation::second_argument_type,
 189                           typename _Operation::result_type> {
 190 protected:
 191   _Operation op;
 192   typename _Operation::first_argument_type value;
 193 public:
 194   binder1st(const _Operation& __x,
 195             const typename _Operation::first_argument_type& __y)
 196       : op(__x), value(__y) {}
 197   typename _Operation::result_type
 198   operator()(const typename _Operation::second_argument_type& __x) const {
 199     return op(value, __x);
 200   }
 201 };
 202
 203 template <class _Operation, class _Tp>
 204 inline binder1st<_Operation>
 205 bind1st(const _Operation& __oper, const _Tp& __x)
 206 {
 207   typedef typename _Operation::first_argument_type _Arg1_type;
 208   return binder1st<_Operation>(__oper, _Arg1_type(__x));
 209 }
 210
 211 template <class _Operation>
 212 class binder2nd
 213   : public unary_function<typename _Operation::first_argument_type,
 214                           typename _Operation::result_type> {
 215 protected:
 216   _Operation op;
 217   typename _Operation::second_argument_type value;
 218 public:
 219   binder2nd(const _Operation& __x,
 220             const typename _Operation::second_argument_type& __y)
 221       : op(__x), value(__y) {}
 222   typename _Operation::result_type
 223   operator()(const typename _Operation::first_argument_type& __x) const {
 224     return op(__x, value);
 225   }
 226 };
 227
 228 template <class _Operation, class _Tp>
 229 inline binder2nd<_Operation>
 230 bind2nd(const _Operation& __oper, const _Tp& __x)
 231 {
 232   typedef typename _Operation::second_argument_type _Arg2_type;
 233   return binder2nd<_Operation>(__oper, _Arg2_type(__x));
 234 }
 235
 236 // unary_compose and binary_compose (extensions, not part of the standard).
 237
 238 template <class _Operation1, class _Operation2>
 239 class unary_compose
 240   : public unary_function<typename _Operation2::argument_type,
 241                           typename _Operation1::result_type>
 242 {
 243 protected:
 244   _Operation1 __op1;
 245   _Operation2 __op2;
 246 public:
 247   unary_compose(const _Operation1& __x, const _Operation2& __y)
 248     : __op1(__x), __op2(__y) {}
 249   typename _Operation1::result_type
 250   operator()(const typename _Operation2::argument_type& __x) const {
 251     return __op1(__op2(__x));
 252   }
 253 };
 254
 255 template <class _Operation1, class _Operation2>
 256 inline unary_compose<_Operation1,_Operation2>
 257 compose1(const _Operation1& __op1, const _Operation2& __op2)
 258 {
 259   return unary_compose<_Operation1,_Operation2>(__op1, __op2);
 260 }
 261
 262 template <class _Operation1, class _Operation2, class _Operation3>
 263 class binary_compose
 264   : public unary_function<typename _Operation2::argument_type,
 265                           typename _Operation1::result_type> {
 266 protected:
 267   _Operation1 _M_op1;
 268   _Operation2 _M_op2;
 269   _Operation3 _M_op3;
 270 public:
 271   binary_compose(const _Operation1& __x, const _Operation2& __y,
 272                  const _Operation3& __z)
 273     : _M_op1(__x), _M_op2(__y), _M_op3(__z) { }
 274   typename _Operation1::result_type
 275   operator()(const typename _Operation2::argument_type& __x) const {
 276     return _M_op1(_M_op2(__x), _M_op3(__x));
 277   }
 278 };
 279
 280 template <class _Operation1, class _Operation2, class _Operation3>
 281 inline binary_compose<_Operation1, _Operation2, _Operation3>
 282 compose2(const _Operation1& __op1, const _Operation2& __op2,
 283          const _Operation3& __op3)
 284 {
 285   return binary_compose<_Operation1,_Operation2,_Operation3>
 286     (__op1, __op2, __op3);
 287 }
 288
 289 template <class _Arg, class _Result>
 290 class pointer_to_unary_function : public unary_function<_Arg, _Result> {
 291 protected:
 292   _Result (*_M_ptr)(_Arg);
 293 public:
 294   pointer_to_unary_function() {}
 295   explicit pointer_to_unary_function(_Result (*__x)(_Arg)) : _M_ptr(__x) {}
 296   _Result operator()(_Arg __x) const { return _M_ptr(__x); }
 297 };
 298
 299 template <class _Arg, class _Result>
 300 inline pointer_to_unary_function<_Arg, _Result> ptr_fun(_Result (*__x)(_Arg))
 301 {
 302   return pointer_to_unary_function<_Arg, _Result>(__x);
 303 }
 304
 305 template <class _Arg1, class _Arg2, class _Result>
 306 class pointer_to_binary_function :
 307   public binary_function<_Arg1,_Arg2,_Result> {
 308 protected:
 309     _Result (*_M_ptr)(_Arg1, _Arg2);
 310 public:
 311     pointer_to_binary_function() {}
 312     explicit pointer_to_binary_function(_Result (*__x)(_Arg1, _Arg2))
 313       : _M_ptr(__x) {}
 314     _Result operator()(_Arg1 __x, _Arg2 __y) const {
 315       return _M_ptr(__x, __y);
 316     }
 317 };
 318
 319 template <class _Arg1, class _Arg2, class _Result>
 320 inline pointer_to_binary_function<_Arg1,_Arg2,_Result>
 321 ptr_fun(_Result (*__x)(_Arg1, _Arg2)) {
 322   return pointer_to_binary_function<_Arg1,_Arg2,_Result>(__x);
 323 }
 324
 325 // identity is an extensions: it is not part of the standard.
 326 template <class _Tp>
 327 struct _Identity : public unary_function<_Tp,_Tp> {
 328   const _Tp& operator()(const _Tp& __x) const { return __x; }
 329 };
 330
 331 template <class _Tp> struct identity : public _Identity<_Tp> {};
 332
 333 // select1st and select2nd are extensions: they are not part of the standard.
 334 template <class _Pair>
 335 struct _Select1st : public unary_function<_Pair, typename _Pair::first_type> {
 336   const typename _Pair::first_type& operator()(const _Pair& __x) const {
 337     return __x.first;
 338   }
 339 };
 340
 341 template <class _Pair>
 342 struct _Select2nd : public unary_function<_Pair, typename _Pair::second_type>
 343 {
 344   const typename _Pair::second_type& operator()(const _Pair& __x) const {
 345     return __x.second;
 346   }
 347 };
 348
 349 template <class _Pair> struct select1st : public _Select1st<_Pair> {};
 350 template <class _Pair> struct select2nd : public _Select2nd<_Pair> {};
 351
 352 // project1st and project2nd are extensions: they are not part of the standard
 353 template <class _Arg1, class _Arg2>
 354 struct _Project1st : public binary_function<_Arg1, _Arg2, _Arg1> {
 355   _Arg1 operator()(const _Arg1& __x, const _Arg2&) const { return __x; }
 356 };
 357
 358 template <class _Arg1, class _Arg2>
 359 struct _Project2nd : public binary_function<_Arg1, _Arg2, _Arg2> {
 360   _Arg2 operator()(const _Arg1&, const _Arg2& __y) const { return __y; }
 361 };
 362
 363 template <class _Arg1, class _Arg2>
 364 struct project1st : public _Project1st<_Arg1, _Arg2> {};
 365
 366 template <class _Arg1, class _Arg2>
 367 struct project2nd : public _Project2nd<_Arg1, _Arg2> {};
 368
 369 // constant_void_fun, constant_unary_fun, and constant_binary_fun are
 370 // extensions: they are not part of the standard.  (The same, of course,
 371 // is true of the helper functions constant0, constant1, and constant2.)
 372 template <class _Result>
 373 struct constant_void_fun
 374 {
 375   typedef _Result result_type;
 376   result_type __val;
 377   constant_void_fun(const result_type& __v) : __val(__v) {}
 378   const result_type& operator()() const { return __val; }
 379 };
 380
 381 #ifndef __STL_LIMITED_DEFAULT_TEMPLATES
 382 template <class _Result, class _Argument = _Result>
 383 #else
 384 template <class _Result, class _Argument>
 385 #endif
 386 struct constant_unary_fun : public unary_function<_Argument, _Result> {
 387   _Result _M_val;
 388   constant_unary_fun(const _Result& __v) : _M_val(__v) {}
 389   const _Result& operator()(const _Argument&) const { return _M_val; }
 390 };
 391
 392 #ifndef __STL_LIMITED_DEFAULT_TEMPLATES
 393 template <class _Result, class _Arg1 = _Result, class _Arg2 = _Arg1>
 394 #else
 395 template <class _Result, class _Arg1, class _Arg2>
 396 #endif
 397 struct constant_binary_fun : public binary_function<_Arg1, _Arg2, _Result> {
 398   _Result _M_val;
 399   constant_binary_fun(const _Result& __v) : _M_val(__v) {}
 400   const _Result& operator()(const _Arg1&, const _Arg2&) const {
 401     return _M_val;
 402   }
 403 };
 404
 405 template <class _Result>
 406 inline constant_void_fun<_Result> constant0(const _Result& __val)
 407 {
 408   return constant_void_fun<_Result>(__val);
 409 }
 410
 411 template <class _Result>
 412 inline constant_unary_fun<_Result,_Result> constant1(const _Result& __val)
 413 {
 414   return constant_unary_fun<_Result,_Result>(__val);
 415 }
 416
 417 template <class _Result>
 418 inline constant_binary_fun<_Result,_Result,_Result>
 419 constant2(const _Result& __val)
 420 {
 421   return constant_binary_fun<_Result,_Result,_Result>(__val);
 422 }
 423
 424 // subtractive_rng is an extension: it is not part of the standard.
 425 // Note: this code assumes that int is 32 bits.
 426 class subtractive_rng : public unary_function<unsigned int, unsigned int> {
 427 private:
 428   unsigned int _M_table[55];
 429   size_t _M_index1;
 430   size_t _M_index2;
 431 public:
 432   unsigned int operator()(unsigned int __limit) {
 433     _M_index1 = (_M_index1 + 1) % 55;
 434     _M_index2 = (_M_index2 + 1) % 55;
 435     _M_table[_M_index1] = _M_table[_M_index1] - _M_table[_M_index2];
 436     return _M_table[_M_index1] % __limit;
 437   }
 438
 439   void _M_initialize(unsigned int __seed)
 440   {
 441     unsigned int __k = 1;
 442     _M_table[54] = __seed;
 443     size_t __i;
 444     for (__i = 0; __i < 54; __i++) {
 445         size_t __ii = (21 * (__i + 1) % 55) - 1;
 446         _M_table[__ii] = __k;
 447         __k = __seed - __k;
 448         __seed = _M_table[__ii];
 449     }
 450     for (int __loop = 0; __loop < 4; __loop++) {
 451         for (__i = 0; __i < 55; __i++)
 452             _M_table[__i] = _M_table[__i] - _M_table[(1 + __i + 30) % 55];
 453     }
 454     _M_index1 = 0;
 455     _M_index2 = 31;
 456   }
 457
 458   subtractive_rng(unsigned int __seed) { _M_initialize(__seed); }
 459   subtractive_rng() { _M_initialize(161803398u); }
 460 };
 461
 462
 463 // Adaptor function objects: pointers to member functions.
 464
 465 // There are a total of 16 = 2^4 function objects in this family.
 466 //  (1) Member functions taking no arguments vs member functions taking
 467 //       one argument.
 468 //  (2) Call through pointer vs call through reference.
 469 //  (3) Member function with void return type vs member function with
 470 //      non-void return type.
 471 //  (4) Const vs non-const member function.
 472
 473 // Note that choice (3) is nothing more than a workaround: according
 474 //  to the draft, compilers should handle void and non-void the same way.
 475 //  This feature is not yet widely implemented, though.  You can only use
 476 //  member functions returning void if your compiler supports partial
 477 //  specialization.
 478
 479 // All of this complexity is in the function objects themselves.  You can
 480 //  ignore it by using the helper function mem_fun and mem_fun_ref,
 481 //  which create whichever type of adaptor is appropriate.
 482 //  (mem_fun1 and mem_fun1_ref are no longer part of the C++ standard,
 483 //  but they are provided for backward compatibility.)
 484
 485
 486 template <class _Ret, class _Tp>
 487 class mem_fun_t : public unary_function<_Tp*,_Ret> {
 488 public:
 489   explicit mem_fun_t(_Ret (_Tp::*__pf)()) : _M_f(__pf) {}
 490   _Ret operator()(_Tp* __p) const { return (__p->*_M_f)(); }
 491 private:
 492   _Ret (_Tp::*_M_f)();
 493 };
 494
 495 template <class _Ret, class _Tp>
 496 class const_mem_fun_t : public unary_function<const _Tp*,_Ret> {
 497 public:
 498   explicit const_mem_fun_t(_Ret (_Tp::*__pf)() const) : _M_f(__pf) {}
 499   _Ret operator()(const _Tp* __p) const { return (__p->*_M_f)(); }
 500 private:
 501   _Ret (_Tp::*_M_f)() const;
 502 };
 503
 504
 505 template <class _Ret, class _Tp>
 506 class mem_fun_ref_t : public unary_function<_Tp,_Ret> {
 507 public:
 508   explicit mem_fun_ref_t(_Ret (_Tp::*__pf)()) : _M_f(__pf) {}
 509   _Ret operator()(_Tp& __r) const { return (__r.*_M_f)(); }
 510 private:
 511   _Ret (_Tp::*_M_f)();
 512 };
 513
 514 template <class _Ret, class _Tp>
 515 class const_mem_fun_ref_t : public unary_function<_Tp,_Ret> {
 516 public:
 517   explicit const_mem_fun_ref_t(_Ret (_Tp::*__pf)() const) : _M_f(__pf) {}
 518   _Ret operator()(const _Tp& __r) const { return (__r.*_M_f)(); }
 519 private:
 520   _Ret (_Tp::*_M_f)() const;
 521 };
 522
 523 template <class _Ret, class _Tp, class _Arg>
 524 class mem_fun1_t : public binary_function<_Tp*,_Arg,_Ret> {
 525 public:
 526   explicit mem_fun1_t(_Ret (_Tp::*__pf)(_Arg)) : _M_f(__pf) {}
 527   _Ret operator()(_Tp* __p, _Arg __x) const { return (__p->*_M_f)(__x); }
 528 private:
 529   _Ret (_Tp::*_M_f)(_Arg);
 530 };
 531
 532 template <class _Ret, class _Tp, class _Arg>
 533 class const_mem_fun1_t : public binary_function<const _Tp*,_Arg,_Ret> {
 534 public:
 535   explicit const_mem_fun1_t(_Ret (_Tp::*__pf)(_Arg) const) : _M_f(__pf) {}
 536   _Ret operator()(const _Tp* __p, _Arg __x) const
 537     { return (__p->*_M_f)(__x); }
 538 private:
 539   _Ret (_Tp::*_M_f)(_Arg) const;
 540 };
 541
 542 template <class _Ret, class _Tp, class _Arg>
 543 class mem_fun1_ref_t : public binary_function<_Tp,_Arg,_Ret> {
 544 public:
 545   explicit mem_fun1_ref_t(_Ret (_Tp::*__pf)(_Arg)) : _M_f(__pf) {}
 546   _Ret operator()(_Tp& __r, _Arg __x) const { return (__r.*_M_f)(__x); }
 547 private:
 548   _Ret (_Tp::*_M_f)(_Arg);
 549 };
 550
 551 template <class _Ret, class _Tp, class _Arg>
 552 class const_mem_fun1_ref_t : public binary_function<_Tp,_Arg,_Ret> {
 553 public:
 554   explicit const_mem_fun1_ref_t(_Ret (_Tp::*__pf)(_Arg) const) : _M_f(__pf) {}
 555   _Ret operator()(const _Tp& __r, _Arg __x) const { return (__r.*_M_f)(__x); }
 556 private:
 557   _Ret (_Tp::*_M_f)(_Arg) const;
 558 };
 559
 560 #ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
 561
 562 template <class _Tp>
 563 class mem_fun_t<void, _Tp> : public unary_function<_Tp*,void> {
 564 public:
 565   explicit mem_fun_t(void (_Tp::*__pf)()) : _M_f(__pf) {}
 566   void operator()(_Tp* __p) const { (__p->*_M_f)(); }
 567 private:
 568   void (_Tp::*_M_f)();
 569 };
 570
 571 template <class _Tp>
 572 class const_mem_fun_t<void, _Tp> : public unary_function<const _Tp*,void> {
 573 public:
 574   explicit const_mem_fun_t(void (_Tp::*__pf)() const) : _M_f(__pf) {}
 575   void operator()(const _Tp* __p) const { (__p->*_M_f)(); }
 576 private:
 577   void (_Tp::*_M_f)() const;
 578 };
 579
 580 template <class _Tp>
 581 class mem_fun_ref_t<void, _Tp> : public unary_function<_Tp,void> {
 582 public:
 583   explicit mem_fun_ref_t(void (_Tp::*__pf)()) : _M_f(__pf) {}
 584   void operator()(_Tp& __r) const { (__r.*_M_f)(); }
 585 private:
 586   void (_Tp::*_M_f)();
 587 };
 588
 589 template <class _Tp>
 590 class const_mem_fun_ref_t<void, _Tp> : public unary_function<_Tp,void> {
 591 public:
 592   explicit const_mem_fun_ref_t(void (_Tp::*__pf)() const) : _M_f(__pf) {}
 593   void operator()(const _Tp& __r) const { (__r.*_M_f)(); }
 594 private:
 595   void (_Tp::*_M_f)() const;
 596 };
 597
 598 template <class _Tp, class _Arg>
 599 class mem_fun1_t<void, _Tp, _Arg> : public binary_function<_Tp*,_Arg,void> {
 600 public:
 601   explicit mem_fun1_t(void (_Tp::*__pf)(_Arg)) : _M_f(__pf) {}
 602   void operator()(_Tp* __p, _Arg __x) const { (__p->*_M_f)(__x); }
 603 private:
 604   void (_Tp::*_M_f)(_Arg);
 605 };
 606
 607 template <class _Tp, class _Arg>
 608 class const_mem_fun1_t<void, _Tp, _Arg>
 609   : public binary_function<const _Tp*,_Arg,void> {
 610 public:
 611   explicit const_mem_fun1_t(void (_Tp::*__pf)(_Arg) const) : _M_f(__pf) {}
 612   void operator()(const _Tp* __p, _Arg __x) const { (__p->*_M_f)(__x); }
 613 private:
 614   void (_Tp::*_M_f)(_Arg) const;
 615 };
 616
 617 template <class _Tp, class _Arg>
 618 class mem_fun1_ref_t<void, _Tp, _Arg>
 619   : public binary_function<_Tp,_Arg,void> {
 620 public:
 621   explicit mem_fun1_ref_t(void (_Tp::*__pf)(_Arg)) : _M_f(__pf) {}
 622   void operator()(_Tp& __r, _Arg __x) const { (__r.*_M_f)(__x); }
 623 private:
 624   void (_Tp::*_M_f)(_Arg);
 625 };
 626
 627 template <class _Tp, class _Arg>
 628 class const_mem_fun1_ref_t<void, _Tp, _Arg>
 629   : public binary_function<_Tp,_Arg,void> {
 630 public:
 631   explicit const_mem_fun1_ref_t(void (_Tp::*__pf)(_Arg) const) : _M_f(__pf) {}
 632   void operator()(const _Tp& __r, _Arg __x) const { (__r.*_M_f)(__x); }
 633 private:
 634   void (_Tp::*_M_f)(_Arg) const;
 635 };
 636
 637 #endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
 638
 639 // Mem_fun adaptor helper functions.  There are only two:
 640 //  mem_fun and mem_fun_ref.  (mem_fun1 and mem_fun1_ref
 641 //  are provided for backward compatibility, but they are no longer
 642 //  part of the C++ standard.)
 643
 644 template <class _Ret, class _Tp>
 645 inline mem_fun_t<_Ret,_Tp> mem_fun(_Ret (_Tp::*__f)())
 646   { return mem_fun_t<_Ret,_Tp>(__f); }
 647
 648 template <class _Ret, class _Tp>
 649 inline const_mem_fun_t<_Ret,_Tp> mem_fun(_Ret (_Tp::*__f)() const)
 650   { return const_mem_fun_t<_Ret,_Tp>(__f); }
 651
 652 template <class _Ret, class _Tp>
 653 inline mem_fun_ref_t<_Ret,_Tp> mem_fun_ref(_Ret (_Tp::*__f)())
 654   { return mem_fun_ref_t<_Ret,_Tp>(__f); }
 655
 656 template <class _Ret, class _Tp>
 657 inline const_mem_fun_ref_t<_Ret,_Tp> mem_fun_ref(_Ret (_Tp::*__f)() const)
 658   { return const_mem_fun_ref_t<_Ret,_Tp>(__f); }
 659
 660 template <class _Ret, class _Tp, class _Arg>
 661 inline mem_fun1_t<_Ret,_Tp,_Arg> mem_fun(_Ret (_Tp::*__f)(_Arg))
 662   { return mem_fun1_t<_Ret,_Tp,_Arg>(__f); }
 663
 664 template <class _Ret, class _Tp, class _Arg>
 665 inline const_mem_fun1_t<_Ret,_Tp,_Arg> mem_fun(_Ret (_Tp::*__f)(_Arg) const)
 666   { return const_mem_fun1_t<_Ret,_Tp,_Arg>(__f); }
 667
 668 template <class _Ret, class _Tp, class _Arg>
 669 inline mem_fun1_ref_t<_Ret,_Tp,_Arg> mem_fun_ref(_Ret (_Tp::*__f)(_Arg))
 670   { return mem_fun1_ref_t<_Ret,_Tp,_Arg>(__f); }
 671
 672 template <class _Ret, class _Tp, class _Arg>
 673 inline const_mem_fun1_ref_t<_Ret,_Tp,_Arg>
 674 mem_fun_ref(_Ret (_Tp::*__f)(_Arg) const)
 675   { return const_mem_fun1_ref_t<_Ret,_Tp,_Arg>(__f); }
 676
 677 template <class _Ret, class _Tp, class _Arg>
 678 inline mem_fun1_t<_Ret,_Tp,_Arg> mem_fun1(_Ret (_Tp::*__f)(_Arg))
 679   { return mem_fun1_t<_Ret,_Tp,_Arg>(__f); }
 680
 681 template <class _Ret, class _Tp, class _Arg>
 682 inline const_mem_fun1_t<_Ret,_Tp,_Arg> mem_fun1(_Ret (_Tp::*__f)(_Arg) const)
 683   { return const_mem_fun1_t<_Ret,_Tp,_Arg>(__f); }
 684
 685 template <class _Ret, class _Tp, class _Arg>
 686 inline mem_fun1_ref_t<_Ret,_Tp,_Arg> mem_fun1_ref(_Ret (_Tp::*__f)(_Arg))
 687   { return mem_fun1_ref_t<_Ret,_Tp,_Arg>(__f); }
 688
 689 template <class _Ret, class _Tp, class _Arg>
 690 inline const_mem_fun1_ref_t<_Ret,_Tp,_Arg>
 691 mem_fun1_ref(_Ret (_Tp::*__f)(_Arg) const)
 692   { return const_mem_fun1_ref_t<_Ret,_Tp,_Arg>(__f); }
 693
 694 __STL_END_NAMESPACE
 695
 696 #endif /* __SGI_STL_INTERNAL_FUNCTION_H */
 697
 698 // Local Variables:
 699 // mode:C++
 700 // End: