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00062 #ifndef _EXT_FUNCTIONAL
00063 #define _EXT_FUNCTIONAL
00064
00065 #pragma GCC system_header
00066 #include <functional>
00067
00068 namespace __gnu_cxx
00069 {
00070 using std::unary_function;
00071 using std::binary_function;
00072 using std::mem_fun1_t;
00073 using std::const_mem_fun1_t;
00074 using std::mem_fun1_ref_t;
00075 using std::const_mem_fun1_ref_t;
00076
00086
00087 template <class _Tp> inline _Tp identity_element(std::plus<_Tp>) {
00088 return _Tp(0);
00089 }
00091 template <class _Tp> inline _Tp identity_element(std::multiplies<_Tp>) {
00092 return _Tp(1);
00093 }
00122
00123 template <class _Operation1, class _Operation2>
00124 class unary_compose
00125 : public unary_function<typename _Operation2::argument_type,
00126 typename _Operation1::result_type>
00127 {
00128 protected:
00129 _Operation1 _M_fn1;
00130 _Operation2 _M_fn2;
00131 public:
00132 unary_compose(const _Operation1& __x, const _Operation2& __y)
00133 : _M_fn1(__x), _M_fn2(__y) {}
00134 typename _Operation1::result_type
00135 operator()(const typename _Operation2::argument_type& __x) const {
00136 return _M_fn1(_M_fn2(__x));
00137 }
00138 };
00139
00141 template <class _Operation1, class _Operation2>
00142 inline unary_compose<_Operation1,_Operation2>
00143 compose1(const _Operation1& __fn1, const _Operation2& __fn2)
00144 {
00145 return unary_compose<_Operation1,_Operation2>(__fn1, __fn2);
00146 }
00147
00149 template <class _Operation1, class _Operation2, class _Operation3>
00150 class binary_compose
00151 : public unary_function<typename _Operation2::argument_type,
00152 typename _Operation1::result_type> {
00153 protected:
00154 _Operation1 _M_fn1;
00155 _Operation2 _M_fn2;
00156 _Operation3 _M_fn3;
00157 public:
00158 binary_compose(const _Operation1& __x, const _Operation2& __y,
00159 const _Operation3& __z)
00160 : _M_fn1(__x), _M_fn2(__y), _M_fn3(__z) { }
00161 typename _Operation1::result_type
00162 operator()(const typename _Operation2::argument_type& __x) const {
00163 return _M_fn1(_M_fn2(__x), _M_fn3(__x));
00164 }
00165 };
00166
00168 template <class _Operation1, class _Operation2, class _Operation3>
00169 inline binary_compose<_Operation1, _Operation2, _Operation3>
00170 compose2(const _Operation1& __fn1, const _Operation2& __fn2,
00171 const _Operation3& __fn3)
00172 {
00173 return binary_compose<_Operation1,_Operation2,_Operation3>
00174 (__fn1, __fn2, __fn3);
00175 }
00184 template <class _Tp> struct identity : public std::_Identity<_Tp> {};
00185
00196
00197 template <class _Pair> struct select1st : public std::_Select1st<_Pair> {};
00199 template <class _Pair> struct select2nd : public std::_Select2nd<_Pair> {};
00202
00203 template <class _Arg1, class _Arg2>
00204 struct _Project1st : public binary_function<_Arg1, _Arg2, _Arg1> {
00205 _Arg1 operator()(const _Arg1& __x, const _Arg2&) const { return __x; }
00206 };
00207
00208 template <class _Arg1, class _Arg2>
00209 struct _Project2nd : public binary_function<_Arg1, _Arg2, _Arg2> {
00210 _Arg2 operator()(const _Arg1&, const _Arg2& __y) const { return __y; }
00211 };
00212
00221
00222 template <class _Arg1, class _Arg2>
00223 struct project1st : public _Project1st<_Arg1, _Arg2> {};
00224
00226 template <class _Arg1, class _Arg2>
00227 struct project2nd : public _Project2nd<_Arg1, _Arg2> {};
00230
00231 template <class _Result>
00232 struct _Constant_void_fun {
00233 typedef _Result result_type;
00234 result_type _M_val;
00235
00236 _Constant_void_fun(const result_type& __v) : _M_val(__v) {}
00237 const result_type& operator()() const { return _M_val; }
00238 };
00239
00240 template <class _Result, class _Argument>
00241 struct _Constant_unary_fun {
00242 typedef _Argument argument_type;
00243 typedef _Result result_type;
00244 result_type _M_val;
00245
00246 _Constant_unary_fun(const result_type& __v) : _M_val(__v) {}
00247 const result_type& operator()(const _Argument&) const { return _M_val; }
00248 };
00249
00250 template <class _Result, class _Arg1, class _Arg2>
00251 struct _Constant_binary_fun {
00252 typedef _Arg1 first_argument_type;
00253 typedef _Arg2 second_argument_type;
00254 typedef _Result result_type;
00255 _Result _M_val;
00256
00257 _Constant_binary_fun(const _Result& __v) : _M_val(__v) {}
00258 const result_type& operator()(const _Arg1&, const _Arg2&) const {
00259 return _M_val;
00260 }
00261 };
00262
00277
00278 template <class _Result>
00279 struct constant_void_fun : public _Constant_void_fun<_Result> {
00280 constant_void_fun(const _Result& __v) : _Constant_void_fun<_Result>(__v) {}
00281 };
00282
00284 template <class _Result,
00285 class _Argument = _Result>
00286 struct constant_unary_fun : public _Constant_unary_fun<_Result, _Argument>
00287 {
00288 constant_unary_fun(const _Result& __v)
00289 : _Constant_unary_fun<_Result, _Argument>(__v) {}
00290 };
00291
00293 template <class _Result,
00294 class _Arg1 = _Result,
00295 class _Arg2 = _Arg1>
00296 struct constant_binary_fun
00297 : public _Constant_binary_fun<_Result, _Arg1, _Arg2>
00298 {
00299 constant_binary_fun(const _Result& __v)
00300 : _Constant_binary_fun<_Result, _Arg1, _Arg2>(__v) {}
00301 };
00302
00304 template <class _Result>
00305 inline constant_void_fun<_Result> constant0(const _Result& __val)
00306 {
00307 return constant_void_fun<_Result>(__val);
00308 }
00309
00311 template <class _Result>
00312 inline constant_unary_fun<_Result,_Result> constant1(const _Result& __val)
00313 {
00314 return constant_unary_fun<_Result,_Result>(__val);
00315 }
00316
00318 template <class _Result>
00319 inline constant_binary_fun<_Result,_Result,_Result>
00320 constant2(const _Result& __val)
00321 {
00322 return constant_binary_fun<_Result,_Result,_Result>(__val);
00323 }
00332 class subtractive_rng : public unary_function<unsigned int, unsigned int> {
00333 private:
00334 unsigned int _M_table[55];
00335 size_t _M_index1;
00336 size_t _M_index2;
00337 public:
00339 unsigned int operator()(unsigned int __limit) {
00340 _M_index1 = (_M_index1 + 1) % 55;
00341 _M_index2 = (_M_index2 + 1) % 55;
00342 _M_table[_M_index1] = _M_table[_M_index1] - _M_table[_M_index2];
00343 return _M_table[_M_index1] % __limit;
00344 }
00345
00346 void _M_initialize(unsigned int __seed)
00347 {
00348 unsigned int __k = 1;
00349 _M_table[54] = __seed;
00350 size_t __i;
00351 for (__i = 0; __i < 54; __i++) {
00352 size_t __ii = (21 * (__i + 1) % 55) - 1;
00353 _M_table[__ii] = __k;
00354 __k = __seed - __k;
00355 __seed = _M_table[__ii];
00356 }
00357 for (int __loop = 0; __loop < 4; __loop++) {
00358 for (__i = 0; __i < 55; __i++)
00359 _M_table[__i] = _M_table[__i] - _M_table[(1 + __i + 30) % 55];
00360 }
00361 _M_index1 = 0;
00362 _M_index2 = 31;
00363 }
00364
00366 subtractive_rng(unsigned int __seed) { _M_initialize(__seed); }
00368 subtractive_rng() { _M_initialize(161803398u); }
00369 };
00370
00371
00372
00373
00374
00375 template <class _Ret, class _Tp, class _Arg>
00376 inline mem_fun1_t<_Ret,_Tp,_Arg> mem_fun1(_Ret (_Tp::*__f)(_Arg))
00377 { return mem_fun1_t<_Ret,_Tp,_Arg>(__f); }
00378
00379 template <class _Ret, class _Tp, class _Arg>
00380 inline const_mem_fun1_t<_Ret,_Tp,_Arg> mem_fun1(_Ret (_Tp::*__f)(_Arg) const)
00381 { return const_mem_fun1_t<_Ret,_Tp,_Arg>(__f); }
00382
00383 template <class _Ret, class _Tp, class _Arg>
00384 inline mem_fun1_ref_t<_Ret,_Tp,_Arg> mem_fun1_ref(_Ret (_Tp::*__f)(_Arg))
00385 { return mem_fun1_ref_t<_Ret,_Tp,_Arg>(__f); }
00386
00387 template <class _Ret, class _Tp, class _Arg>
00388 inline const_mem_fun1_ref_t<_Ret,_Tp,_Arg>
00389 mem_fun1_ref(_Ret (_Tp::*__f)(_Arg) const)
00390 { return const_mem_fun1_ref_t<_Ret,_Tp,_Arg>(__f); }
00391
00392 }
00393
00394 #endif
00395