libstdc++
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00001 // Output streams -*- C++ -*- 00002 00003 // Copyright (C) 1997-2019 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file include/ostream 00026 * This is a Standard C++ Library header. 00027 */ 00028 00029 // 00030 // ISO C++ 14882: 27.6.2 Output streams 00031 // 00032 00033 #ifndef _GLIBCXX_OSTREAM 00034 #define _GLIBCXX_OSTREAM 1 00035 00036 #pragma GCC system_header 00037 00038 #include <ios> 00039 #include <bits/ostream_insert.h> 00040 00041 namespace std _GLIBCXX_VISIBILITY(default) 00042 { 00043 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00044 00045 /** 00046 * @brief Template class basic_ostream. 00047 * @ingroup io 00048 * 00049 * @tparam _CharT Type of character stream. 00050 * @tparam _Traits Traits for character type, defaults to 00051 * char_traits<_CharT>. 00052 * 00053 * This is the base class for all output streams. It provides text 00054 * formatting of all builtin types, and communicates with any class 00055 * derived from basic_streambuf to do the actual output. 00056 */ 00057 template<typename _CharT, typename _Traits> 00058 class basic_ostream : virtual public basic_ios<_CharT, _Traits> 00059 { 00060 public: 00061 // Types (inherited from basic_ios): 00062 typedef _CharT char_type; 00063 typedef typename _Traits::int_type int_type; 00064 typedef typename _Traits::pos_type pos_type; 00065 typedef typename _Traits::off_type off_type; 00066 typedef _Traits traits_type; 00067 00068 // Non-standard Types: 00069 typedef basic_streambuf<_CharT, _Traits> __streambuf_type; 00070 typedef basic_ios<_CharT, _Traits> __ios_type; 00071 typedef basic_ostream<_CharT, _Traits> __ostream_type; 00072 typedef num_put<_CharT, ostreambuf_iterator<_CharT, _Traits> > 00073 __num_put_type; 00074 typedef ctype<_CharT> __ctype_type; 00075 00076 /** 00077 * @brief Base constructor. 00078 * 00079 * This ctor is almost never called by the user directly, rather from 00080 * derived classes' initialization lists, which pass a pointer to 00081 * their own stream buffer. 00082 */ 00083 explicit 00084 basic_ostream(__streambuf_type* __sb) 00085 { this->init(__sb); } 00086 00087 /** 00088 * @brief Base destructor. 00089 * 00090 * This does very little apart from providing a virtual base dtor. 00091 */ 00092 virtual 00093 ~basic_ostream() { } 00094 00095 /// Safe prefix/suffix operations. 00096 class sentry; 00097 friend class sentry; 00098 00099 //@{ 00100 /** 00101 * @brief Interface for manipulators. 00102 * 00103 * Manipulators such as @c std::endl and @c std::hex use these 00104 * functions in constructs like "std::cout << std::endl". For more 00105 * information, see the iomanip header. 00106 */ 00107 __ostream_type& 00108 operator<<(__ostream_type& (*__pf)(__ostream_type&)) 00109 { 00110 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00111 // DR 60. What is a formatted input function? 00112 // The inserters for manipulators are *not* formatted output functions. 00113 return __pf(*this); 00114 } 00115 00116 __ostream_type& 00117 operator<<(__ios_type& (*__pf)(__ios_type&)) 00118 { 00119 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00120 // DR 60. What is a formatted input function? 00121 // The inserters for manipulators are *not* formatted output functions. 00122 __pf(*this); 00123 return *this; 00124 } 00125 00126 __ostream_type& 00127 operator<<(ios_base& (*__pf) (ios_base&)) 00128 { 00129 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00130 // DR 60. What is a formatted input function? 00131 // The inserters for manipulators are *not* formatted output functions. 00132 __pf(*this); 00133 return *this; 00134 } 00135 //@} 00136 00137 //@{ 00138 /** 00139 * @name Inserters 00140 * 00141 * All the @c operator<< functions (aka <em>formatted output 00142 * functions</em>) have some common behavior. Each starts by 00143 * constructing a temporary object of type std::basic_ostream::sentry. 00144 * This can have several effects, concluding with the setting of a 00145 * status flag; see the sentry documentation for more. 00146 * 00147 * If the sentry status is good, the function tries to generate 00148 * whatever data is appropriate for the type of the argument. 00149 * 00150 * If an exception is thrown during insertion, ios_base::badbit 00151 * will be turned on in the stream's error state without causing an 00152 * ios_base::failure to be thrown. The original exception will then 00153 * be rethrown. 00154 */ 00155 00156 //@{ 00157 /** 00158 * @brief Integer arithmetic inserters 00159 * @param __n A variable of builtin integral type. 00160 * @return @c *this if successful 00161 * 00162 * These functions use the stream's current locale (specifically, the 00163 * @c num_get facet) to perform numeric formatting. 00164 */ 00165 __ostream_type& 00166 operator<<(long __n) 00167 { return _M_insert(__n); } 00168 00169 __ostream_type& 00170 operator<<(unsigned long __n) 00171 { return _M_insert(__n); } 00172 00173 __ostream_type& 00174 operator<<(bool __n) 00175 { return _M_insert(__n); } 00176 00177 __ostream_type& 00178 operator<<(short __n); 00179 00180 __ostream_type& 00181 operator<<(unsigned short __n) 00182 { 00183 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00184 // 117. basic_ostream uses nonexistent num_put member functions. 00185 return _M_insert(static_cast<unsigned long>(__n)); 00186 } 00187 00188 __ostream_type& 00189 operator<<(int __n); 00190 00191 __ostream_type& 00192 operator<<(unsigned int __n) 00193 { 00194 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00195 // 117. basic_ostream uses nonexistent num_put member functions. 00196 return _M_insert(static_cast<unsigned long>(__n)); 00197 } 00198 00199 #ifdef _GLIBCXX_USE_LONG_LONG 00200 __ostream_type& 00201 operator<<(long long __n) 00202 { return _M_insert(__n); } 00203 00204 __ostream_type& 00205 operator<<(unsigned long long __n) 00206 { return _M_insert(__n); } 00207 #endif 00208 //@} 00209 00210 //@{ 00211 /** 00212 * @brief Floating point arithmetic inserters 00213 * @param __f A variable of builtin floating point type. 00214 * @return @c *this if successful 00215 * 00216 * These functions use the stream's current locale (specifically, the 00217 * @c num_get facet) to perform numeric formatting. 00218 */ 00219 __ostream_type& 00220 operator<<(double __f) 00221 { return _M_insert(__f); } 00222 00223 __ostream_type& 00224 operator<<(float __f) 00225 { 00226 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00227 // 117. basic_ostream uses nonexistent num_put member functions. 00228 return _M_insert(static_cast<double>(__f)); 00229 } 00230 00231 __ostream_type& 00232 operator<<(long double __f) 00233 { return _M_insert(__f); } 00234 //@} 00235 00236 /** 00237 * @brief Pointer arithmetic inserters 00238 * @param __p A variable of pointer type. 00239 * @return @c *this if successful 00240 * 00241 * These functions use the stream's current locale (specifically, the 00242 * @c num_get facet) to perform numeric formatting. 00243 */ 00244 __ostream_type& 00245 operator<<(const void* __p) 00246 { return _M_insert(__p); } 00247 00248 #if __cplusplus >= 201703L 00249 __ostream_type& 00250 operator<<(nullptr_t) 00251 { return *this << "nullptr"; } 00252 #endif 00253 00254 /** 00255 * @brief Extracting from another streambuf. 00256 * @param __sb A pointer to a streambuf 00257 * 00258 * This function behaves like one of the basic arithmetic extractors, 00259 * in that it also constructs a sentry object and has the same error 00260 * handling behavior. 00261 * 00262 * If @p __sb is NULL, the stream will set failbit in its error state. 00263 * 00264 * Characters are extracted from @p __sb and inserted into @c *this 00265 * until one of the following occurs: 00266 * 00267 * - the input stream reaches end-of-file, 00268 * - insertion into the output sequence fails (in this case, the 00269 * character that would have been inserted is not extracted), or 00270 * - an exception occurs while getting a character from @p __sb, which 00271 * sets failbit in the error state 00272 * 00273 * If the function inserts no characters, failbit is set. 00274 */ 00275 __ostream_type& 00276 operator<<(__streambuf_type* __sb); 00277 //@} 00278 00279 //@{ 00280 /** 00281 * @name Unformatted Output Functions 00282 * 00283 * All the unformatted output functions have some common behavior. 00284 * Each starts by constructing a temporary object of type 00285 * std::basic_ostream::sentry. This has several effects, concluding 00286 * with the setting of a status flag; see the sentry documentation 00287 * for more. 00288 * 00289 * If the sentry status is good, the function tries to generate 00290 * whatever data is appropriate for the type of the argument. 00291 * 00292 * If an exception is thrown during insertion, ios_base::badbit 00293 * will be turned on in the stream's error state. If badbit is on in 00294 * the stream's exceptions mask, the exception will be rethrown 00295 * without completing its actions. 00296 */ 00297 00298 /** 00299 * @brief Simple insertion. 00300 * @param __c The character to insert. 00301 * @return *this 00302 * 00303 * Tries to insert @p __c. 00304 * 00305 * @note This function is not overloaded on signed char and 00306 * unsigned char. 00307 */ 00308 __ostream_type& 00309 put(char_type __c); 00310 00311 /** 00312 * @brief Core write functionality, without sentry. 00313 * @param __s The array to insert. 00314 * @param __n Maximum number of characters to insert. 00315 */ 00316 void 00317 _M_write(const char_type* __s, streamsize __n) 00318 { 00319 const streamsize __put = this->rdbuf()->sputn(__s, __n); 00320 if (__put != __n) 00321 this->setstate(ios_base::badbit); 00322 } 00323 00324 /** 00325 * @brief Character string insertion. 00326 * @param __s The array to insert. 00327 * @param __n Maximum number of characters to insert. 00328 * @return *this 00329 * 00330 * Characters are copied from @p __s and inserted into the stream until 00331 * one of the following happens: 00332 * 00333 * - @p __n characters are inserted 00334 * - inserting into the output sequence fails (in this case, badbit 00335 * will be set in the stream's error state) 00336 * 00337 * @note This function is not overloaded on signed char and 00338 * unsigned char. 00339 */ 00340 __ostream_type& 00341 write(const char_type* __s, streamsize __n); 00342 //@} 00343 00344 /** 00345 * @brief Synchronizing the stream buffer. 00346 * @return *this 00347 * 00348 * If @c rdbuf() is a null pointer, changes nothing. 00349 * 00350 * Otherwise, calls @c rdbuf()->pubsync(), and if that returns -1, 00351 * sets badbit. 00352 */ 00353 __ostream_type& 00354 flush(); 00355 00356 /** 00357 * @brief Getting the current write position. 00358 * @return A file position object. 00359 * 00360 * If @c fail() is not false, returns @c pos_type(-1) to indicate 00361 * failure. Otherwise returns @c rdbuf()->pubseekoff(0,cur,out). 00362 */ 00363 pos_type 00364 tellp(); 00365 00366 /** 00367 * @brief Changing the current write position. 00368 * @param __pos A file position object. 00369 * @return *this 00370 * 00371 * If @c fail() is not true, calls @c rdbuf()->pubseekpos(pos). If 00372 * that function fails, sets failbit. 00373 */ 00374 __ostream_type& 00375 seekp(pos_type); 00376 00377 /** 00378 * @brief Changing the current write position. 00379 * @param __off A file offset object. 00380 * @param __dir The direction in which to seek. 00381 * @return *this 00382 * 00383 * If @c fail() is not true, calls @c rdbuf()->pubseekoff(off,dir). 00384 * If that function fails, sets failbit. 00385 */ 00386 __ostream_type& 00387 seekp(off_type, ios_base::seekdir); 00388 00389 protected: 00390 basic_ostream() 00391 { this->init(0); } 00392 00393 #if __cplusplus >= 201103L 00394 // Non-standard constructor that does not call init() 00395 basic_ostream(basic_iostream<_CharT, _Traits>&) { } 00396 00397 basic_ostream(const basic_ostream&) = delete; 00398 00399 basic_ostream(basic_ostream&& __rhs) 00400 : __ios_type() 00401 { __ios_type::move(__rhs); } 00402 00403 // 27.7.3.3 Assign/swap 00404 00405 basic_ostream& operator=(const basic_ostream&) = delete; 00406 00407 basic_ostream& 00408 operator=(basic_ostream&& __rhs) 00409 { 00410 swap(__rhs); 00411 return *this; 00412 } 00413 00414 void 00415 swap(basic_ostream& __rhs) 00416 { __ios_type::swap(__rhs); } 00417 #endif 00418 00419 template<typename _ValueT> 00420 __ostream_type& 00421 _M_insert(_ValueT __v); 00422 }; 00423 00424 /** 00425 * @brief Performs setup work for output streams. 00426 * 00427 * Objects of this class are created before all of the standard 00428 * inserters are run. It is responsible for <em>exception-safe prefix and 00429 * suffix operations</em>. 00430 */ 00431 template <typename _CharT, typename _Traits> 00432 class basic_ostream<_CharT, _Traits>::sentry 00433 { 00434 // Data Members. 00435 bool _M_ok; 00436 basic_ostream<_CharT, _Traits>& _M_os; 00437 00438 public: 00439 /** 00440 * @brief The constructor performs preparatory work. 00441 * @param __os The output stream to guard. 00442 * 00443 * If the stream state is good (@a __os.good() is true), then if the 00444 * stream is tied to another output stream, @c is.tie()->flush() 00445 * is called to synchronize the output sequences. 00446 * 00447 * If the stream state is still good, then the sentry state becomes 00448 * true (@a okay). 00449 */ 00450 explicit 00451 sentry(basic_ostream<_CharT, _Traits>& __os); 00452 00453 #pragma GCC diagnostic push 00454 #pragma GCC diagnostic ignored "-Wdeprecated-declarations" 00455 /** 00456 * @brief Possibly flushes the stream. 00457 * 00458 * If @c ios_base::unitbuf is set in @c os.flags(), and 00459 * @c std::uncaught_exception() is true, the sentry destructor calls 00460 * @c flush() on the output stream. 00461 */ 00462 ~sentry() 00463 { 00464 // XXX MT 00465 if (bool(_M_os.flags() & ios_base::unitbuf) && !uncaught_exception()) 00466 { 00467 // Can't call flush directly or else will get into recursive lock. 00468 if (_M_os.rdbuf() && _M_os.rdbuf()->pubsync() == -1) 00469 _M_os.setstate(ios_base::badbit); 00470 } 00471 } 00472 #pragma GCC diagnostic pop 00473 00474 /** 00475 * @brief Quick status checking. 00476 * @return The sentry state. 00477 * 00478 * For ease of use, sentries may be converted to booleans. The 00479 * return value is that of the sentry state (true == okay). 00480 */ 00481 #if __cplusplus >= 201103L 00482 explicit 00483 #endif 00484 operator bool() const 00485 { return _M_ok; } 00486 }; 00487 00488 //@{ 00489 /** 00490 * @brief Character inserters 00491 * @param __out An output stream. 00492 * @param __c A character. 00493 * @return out 00494 * 00495 * Behaves like one of the formatted arithmetic inserters described in 00496 * std::basic_ostream. After constructing a sentry object with good 00497 * status, this function inserts a single character and any required 00498 * padding (as determined by [22.2.2.2.2]). @c __out.width(0) is then 00499 * called. 00500 * 00501 * If @p __c is of type @c char and the character type of the stream is not 00502 * @c char, the character is widened before insertion. 00503 */ 00504 template<typename _CharT, typename _Traits> 00505 inline basic_ostream<_CharT, _Traits>& 00506 operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c) 00507 { return __ostream_insert(__out, &__c, 1); } 00508 00509 template<typename _CharT, typename _Traits> 00510 inline basic_ostream<_CharT, _Traits>& 00511 operator<<(basic_ostream<_CharT, _Traits>& __out, char __c) 00512 { return (__out << __out.widen(__c)); } 00513 00514 // Specialization 00515 template <class _Traits> 00516 inline basic_ostream<char, _Traits>& 00517 operator<<(basic_ostream<char, _Traits>& __out, char __c) 00518 { return __ostream_insert(__out, &__c, 1); } 00519 00520 // Signed and unsigned 00521 template<class _Traits> 00522 inline basic_ostream<char, _Traits>& 00523 operator<<(basic_ostream<char, _Traits>& __out, signed char __c) 00524 { return (__out << static_cast<char>(__c)); } 00525 00526 template<class _Traits> 00527 inline basic_ostream<char, _Traits>& 00528 operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c) 00529 { return (__out << static_cast<char>(__c)); } 00530 //@} 00531 00532 //@{ 00533 /** 00534 * @brief String inserters 00535 * @param __out An output stream. 00536 * @param __s A character string. 00537 * @return out 00538 * @pre @p __s must be a non-NULL pointer 00539 * 00540 * Behaves like one of the formatted arithmetic inserters described in 00541 * std::basic_ostream. After constructing a sentry object with good 00542 * status, this function inserts @c traits::length(__s) characters starting 00543 * at @p __s, widened if necessary, followed by any required padding (as 00544 * determined by [22.2.2.2.2]). @c __out.width(0) is then called. 00545 */ 00546 template<typename _CharT, typename _Traits> 00547 inline basic_ostream<_CharT, _Traits>& 00548 operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s) 00549 { 00550 if (!__s) 00551 __out.setstate(ios_base::badbit); 00552 else 00553 __ostream_insert(__out, __s, 00554 static_cast<streamsize>(_Traits::length(__s))); 00555 return __out; 00556 } 00557 00558 template<typename _CharT, typename _Traits> 00559 basic_ostream<_CharT, _Traits> & 00560 operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s); 00561 00562 // Partial specializations 00563 template<class _Traits> 00564 inline basic_ostream<char, _Traits>& 00565 operator<<(basic_ostream<char, _Traits>& __out, const char* __s) 00566 { 00567 if (!__s) 00568 __out.setstate(ios_base::badbit); 00569 else 00570 __ostream_insert(__out, __s, 00571 static_cast<streamsize>(_Traits::length(__s))); 00572 return __out; 00573 } 00574 00575 // Signed and unsigned 00576 template<class _Traits> 00577 inline basic_ostream<char, _Traits>& 00578 operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s) 00579 { return (__out << reinterpret_cast<const char*>(__s)); } 00580 00581 template<class _Traits> 00582 inline basic_ostream<char, _Traits> & 00583 operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s) 00584 { return (__out << reinterpret_cast<const char*>(__s)); } 00585 //@} 00586 00587 // Standard basic_ostream manipulators 00588 00589 /** 00590 * @brief Write a newline and flush the stream. 00591 * 00592 * This manipulator is often mistakenly used when a simple newline is 00593 * desired, leading to poor buffering performance. See 00594 * https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html#io.streambuf.buffering 00595 * for more on this subject. 00596 */ 00597 template<typename _CharT, typename _Traits> 00598 inline basic_ostream<_CharT, _Traits>& 00599 endl(basic_ostream<_CharT, _Traits>& __os) 00600 { return flush(__os.put(__os.widen('\n'))); } 00601 00602 /** 00603 * @brief Write a null character into the output sequence. 00604 * 00605 * <em>Null character</em> is @c CharT() by definition. For CharT 00606 * of @c char, this correctly writes the ASCII @c NUL character 00607 * string terminator. 00608 */ 00609 template<typename _CharT, typename _Traits> 00610 inline basic_ostream<_CharT, _Traits>& 00611 ends(basic_ostream<_CharT, _Traits>& __os) 00612 { return __os.put(_CharT()); } 00613 00614 /** 00615 * @brief Flushes the output stream. 00616 * 00617 * This manipulator simply calls the stream's @c flush() member function. 00618 */ 00619 template<typename _CharT, typename _Traits> 00620 inline basic_ostream<_CharT, _Traits>& 00621 flush(basic_ostream<_CharT, _Traits>& __os) 00622 { return __os.flush(); } 00623 00624 #if __cplusplus >= 201103L 00625 template<typename _Ch, typename _Up> 00626 basic_ostream<_Ch, _Up>& 00627 __is_convertible_to_basic_ostream_test(basic_ostream<_Ch, _Up>*); 00628 00629 template<typename _Tp, typename = void> 00630 struct __is_convertible_to_basic_ostream_impl 00631 { 00632 using __ostream_type = void; 00633 }; 00634 00635 template<typename _Tp> 00636 using __do_is_convertible_to_basic_ostream_impl = 00637 decltype(__is_convertible_to_basic_ostream_test 00638 (declval<typename remove_reference<_Tp>::type*>())); 00639 00640 template<typename _Tp> 00641 struct __is_convertible_to_basic_ostream_impl 00642 <_Tp, 00643 __void_t<__do_is_convertible_to_basic_ostream_impl<_Tp>>> 00644 { 00645 using __ostream_type = 00646 __do_is_convertible_to_basic_ostream_impl<_Tp>; 00647 }; 00648 00649 template<typename _Tp> 00650 struct __is_convertible_to_basic_ostream 00651 : __is_convertible_to_basic_ostream_impl<_Tp> 00652 { 00653 public: 00654 using type = __not_<is_void< 00655 typename __is_convertible_to_basic_ostream_impl<_Tp>::__ostream_type>>; 00656 constexpr static bool value = type::value; 00657 }; 00658 00659 template<typename _Ostream, typename _Tp, typename = void> 00660 struct __is_insertable : false_type {}; 00661 00662 template<typename _Ostream, typename _Tp> 00663 struct __is_insertable<_Ostream, _Tp, 00664 __void_t<decltype(declval<_Ostream&>() 00665 << declval<const _Tp&>())>> 00666 : true_type {}; 00667 00668 template<typename _Ostream> 00669 using __rvalue_ostream_type = 00670 typename __is_convertible_to_basic_ostream< 00671 _Ostream>::__ostream_type; 00672 00673 /** 00674 * @brief Generic inserter for rvalue stream 00675 * @param __os An input stream. 00676 * @param __x A reference to the object being inserted. 00677 * @return os 00678 * 00679 * This is just a forwarding function to allow insertion to 00680 * rvalue streams since they won't bind to the inserter functions 00681 * that take an lvalue reference. 00682 */ 00683 template<typename _Ostream, typename _Tp> 00684 inline 00685 typename enable_if<__and_<__not_<is_lvalue_reference<_Ostream>>, 00686 __is_convertible_to_basic_ostream<_Ostream>, 00687 __is_insertable< 00688 __rvalue_ostream_type<_Ostream>, 00689 const _Tp&>>::value, 00690 __rvalue_ostream_type<_Ostream>>::type 00691 operator<<(_Ostream&& __os, const _Tp& __x) 00692 { 00693 __rvalue_ostream_type<_Ostream> __ret_os = __os; 00694 __ret_os << __x; 00695 return __ret_os; 00696 } 00697 #endif // C++11 00698 00699 _GLIBCXX_END_NAMESPACE_VERSION 00700 } // namespace std 00701 00702 #include <bits/ostream.tcc> 00703 00704 #endif /* _GLIBCXX_OSTREAM */