Standard library header <strstream> (deprecated in C++98)(removed in C++26)

 

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Language support <cfloat> <climits> <compare>(C++20) <contracts>(C++26) <coroutine>(C++20) <csetjmp> <csignal> <cstdarg> <cstddef> <cstdint>(C++11) <cstdlib> <exception> <initializer_list>(C++11)    <limits> <new> <source_location>(C++20) <stdfloat>(C++23) <typeinfo> <version>(C++20) Concepts <concepts>(C++20) Diagnostics <cassert> <cerrno> <debugging>(C++26) <stacktrace>(C++23) <stdexcept> <system_error>(C++11) Memory management <memory> <memory_resource>(C++17) <scoped_allocator>(C++11) Metaprogramming <type_traits>(C++11) <ratio>(C++11)

General utilities <any>(C++17) <bitset> <bit>(C++20) <charconv>(C++17) <expected>(C++23) <format>(C++20) <functional> <optional>(C++17) <stdbit.h>(C++26) <tuple>(C++11) <typeindex>(C++11) <utility> <variant>(C++17) Containers <array>(C++11) <deque> <flat_map>(C++23) <flat_set>(C++23) <forward_list>(C++11) <hive>(C++26) <inplace_vector>(C++26)    <list> <map> <mdspan>(C++23) <queue> <set> <span>(C++20) <stack> <unordered_map>(C++11) <unordered_set>(C++11) <vector> Iterators <iterator> Ranges <generator>(C++23) <ranges>(C++20)

Algorithms <algorithm> <numeric> Strings <cctype> <cstring> <cuchar>(C++11) <cwchar> <cwctype> <string_view>(C++17) <string> Text processing <clocale> <codecvt>(C++11/17/26*) <locale> <regex>(C++11) <text_encoding>(C++26)    Numerics <cfenv>(C++11) <cmath> <complex> <linalg>(C++26) <numbers>(C++20) <random>(C++11) <simd>(C++26) <stdckdint.h>(C++26) <valarray> Time <chrono>(C++11) <ctime> C compatibility <ccomplex>(C++11/17/20*) <ciso646>(until C++20) <cstdalign>(C++11/17/20*) <cstdbool>(C++11/17/20*) <ctgmath>(C++11/17/20*)

Input/output <cinttypes>(C++11) <cstdio> <filesystem>(C++17) <fstream> <iomanip> <iosfwd> <iostream> <ios> <istream> <ostream> <print>(C++23) <spanstream>(C++23) <sstream> <streambuf> <strstream>(C++98/26*) <syncstream>(C++20) Concurrency support <atomic>(C++11) <barrier>(C++20) <condition_variable>(C++11) <future>(C++11) <hazard_pointer>(C++26) <latch>(C++20) <mutex>(C++11) <rcu>(C++26) <semaphore>(C++20) <shared_mutex>(C++14) <stdatomic.h>(C++23) <stop_token>(C++20) <thread>(C++11) Execution support <execution>(C++17)

 

This header is part of the Input/Output library.

Classes
strstreambuf (deprecated in C++98)(removed in C++26)	implements raw character array device (class)
istrstream (deprecated in C++98)(removed in C++26)	implements character array input operations (class)
ostrstream (deprecated in C++98)(removed in C++26)	implements character array output operations (class)
strstream (deprecated in C++98)(removed in C++26)	implements character array input/output operations (class)

Notes

<strstream> is deprecated in C++98 and removed in C++26 (see P2867R1).

The reason for removal is that C++20 and C++23 provide superior replacement facilities, such as the ability to move strings efficiently out of std::stringstreams (since C++20, see P0408R7), and the <spanstream> library (since C++23, see P0448R4).

Synopsis

namespace std {class strstreambuf;class istrstream;class ostrstream;class strstream;}

Class std::strstreambuf

namespace std {class strstreambuf :public basic_streambuf<char>{public: strstreambuf(): strstreambuf(0){}explicit strstreambuf(streamsize alsize_arg); strstreambuf(void*(*palloc_arg)(size_t), void(*pfree_arg)(void*)); strstreambuf(char* gnext_arg, streamsize n, char* pbeg_arg = nullptr); strstreambuf(constchar* gnext_arg, streamsize n);   strstreambuf(signedchar* gnext_arg, streamsize n, signedchar* pbeg_arg = nullptr); strstreambuf(constsignedchar* gnext_arg, streamsize n); strstreambuf(unsignedchar* gnext_arg, streamsize n, unsignedchar* pbeg_arg = nullptr); strstreambuf(constunsignedchar* gnext_arg, streamsize n);   virtual ~strstreambuf();   void freeze(bool freezefl =true);char* str();int pcount();   protected: int_type overflow (int_type c =EOF) override; int_type pbackfail(int_type c =EOF) override; int_type underflow() override; pos_type seekoff(off_type off, ios_base::seekdir way, ios_base::openmode which = ios_base::in| ios_base::out) override; pos_type seekpos(pos_type sp, ios_base::openmode which = ios_base::in| ios_base::out) override; streambuf* setbuf(char* s, streamsize n) override;   private:using strstate =/*bitmask type*/;// exposition onlystaticconst strstate allocated;// exposition onlystaticconst strstate constant;// exposition onlystaticconst strstate dynamic;// exposition onlystaticconst strstate frozen;// exposition only strstate strmode;// exposition only streamsize alsize;// exposition onlyvoid*(*palloc)(size_t);// exposition onlyvoid(*pfree)(void*);// exposition only};}

Class std::istrstream

namespace std {class istrstream :public basic_istream<char>{public:explicit istrstream(constchar* s);explicit istrstream(char* s); istrstream(constchar* s, streamsize n); istrstream(char* s, streamsize n);virtual ~istrstream();   strstreambuf* rdbuf()const;char* str();private: strstreambuf sb;// exposition only};}

Class std::ostrstream

namespace std {class ostrstream :public basic_ostream<char>{public: ostrstream(); ostrstream(char* s, int n, ios_base::openmode mode = ios_base::out);virtual ~ostrstream();   strstreambuf* rdbuf()const;void freeze(bool freezefl =true);char* str();int pcount()const;private: strstreambuf sb;// exposition only};}

Class std::strstream

namespace std {class strstream :public basic_iostream<char>{public:// typesusing char_type =char;using int_type = char_traits<char>::int_type;using pos_type = char_traits<char>::pos_type;using off_type = char_traits<char>::off_type;   // constructors/destructor strstream(); strstream(char* s, int n, ios_base::openmode mode = ios_base::in| ios_base::out);virtual ~strstream();   // members strstreambuf* rdbuf()const;void freeze(bool freezefl =true);int pcount()const;char* str();   private: strstreambuf sb;// exposition only};}