Scroll to navigation

std::basic_stringstream< _CharT, _Traits, _Alloc >(3cxx) std::basic_stringstream< _CharT, _Traits, _Alloc >(3cxx)

NAME

std::basic_stringstream< _CharT, _Traits, _Alloc > - Controlling input and output for std::string.

SYNOPSIS

Public Types


typedef basic_iostream< char_type, traits_type > __iostream_type
typedef basic_string< _CharT, _Traits, _Alloc > __string_type
typedef basic_stringbuf< _CharT, _Traits, _Alloc > __stringbuf_type
typedef _Alloc allocator_type
typedef _CharT char_type
typedef traits_type::int_type int_type
typedef traits_type::off_type off_type
typedef traits_type::pos_type pos_type
typedef _Traits traits_type

Public Member Functions


basic_stringstream ()
Default constructor starts with an empty string buffer. basic_stringstream (basic_stringstream &&__rhs)
basic_stringstream (const __string_type &__str, ios_base::openmode __m=ios_base::out|ios_base::in)
Starts with an existing string buffer. basic_stringstream (const basic_stringstream &)=delete
basic_stringstream (ios_base::openmode __m)
Starts with an empty string buffer. ~basic_stringstream ()
The destructor does nothing. basic_stringstream & operator= (basic_stringstream &&__rhs)
basic_stringstream & operator= (const basic_stringstream &)=delete
__stringbuf_type * rdbuf () const
Accessing the underlying buffer. __string_type str () const
Copying out the string buffer. void str (const __string_type &__s)
Setting a new buffer. void swap (basic_stringstream &__rhs)

Detailed Description

template<typename _CharT, typename _Traits, typename _Alloc>

class std::basic_stringstream< _CharT, _Traits, _Alloc >" Controlling input and output for std::string.

Template Parameters

_CharT Type of character stream.
_Traits Traits for character type, defaults to char_traits<_CharT>.
_Alloc Allocator type, defaults to allocator<_CharT>.

This class supports reading from and writing to objects of type std::basic_string, using the inherited functions from std::basic_iostream. To control the associated sequence, an instance of std::basic_stringbuf is used, which this page refers to as sb.

Definition at line 108 of file iosfwd.

Constructor & Destructor Documentation

template<typename _CharT , typename _Traits , typename _Alloc > std::basic_stringstream< _CharT, _Traits, _Alloc >::basic_stringstream () [inline]

Default constructor starts with an empty string buffer. Initializes sb using the mode in|out, and passes &sb to the base class initializer. Does not allocate any buffer.

That's a lie. We initialize the base class with NULL, because the string class does its own memory management.

Definition at line 741 of file sstream.

template<typename _CharT , typename _Traits , typename _Alloc > std::basic_stringstream< _CharT, _Traits, _Alloc >::basic_stringstream (ios_base::openmode __m) [inline], [explicit]

Starts with an empty string buffer.

Parameters

__m Whether the buffer can read, or write, or both.

Initializes sb using the mode from __m, and passes &sb to the base class initializer. Does not allocate any buffer.

That's a lie. We initialize the base class with NULL, because the string class does its own memory management.

Definition at line 756 of file sstream.

template<typename _CharT , typename _Traits , typename _Alloc > std::basic_stringstream< _CharT, _Traits, _Alloc >::basic_stringstream (const __string_type & __str, ios_base::openmode __m = ios_base::out | ios_base::in) [inline], [explicit]

Starts with an existing string buffer.

Parameters

__str A string to copy as a starting buffer.
__m Whether the buffer can read, or write, or both.

Initializes sb using __str and __m, and passes &sb to the base class initializer.

That's a lie. We initialize the base class with NULL, because the string class does its own memory management.

Definition at line 772 of file sstream.

template<typename _CharT , typename _Traits , typename _Alloc > std::basic_stringstream< _CharT, _Traits, _Alloc >::~basic_stringstream () [inline]

The destructor does nothing. The buffer is deallocated by the stringbuf object, not the formatting stream.

Definition at line 783 of file sstream.

Member Function Documentation

template<typename _CharT , typename _Traits , typename _Alloc > __stringbuf_type* std::basic_stringstream< _CharT, _Traits, _Alloc >::rdbuf () const [inline]

Accessing the underlying buffer.

Returns

The current basic_stringbuf buffer.

This hides both signatures of std::basic_ios::rdbuf().

Definition at line 823 of file sstream.

template<typename _CharT , typename _Traits , typename _Alloc > __string_type std::basic_stringstream< _CharT, _Traits, _Alloc >::str () const [inline]

Copying out the string buffer.

Returns

rdbuf()->str()

Definition at line 831 of file sstream.

template<typename _CharT , typename _Traits , typename _Alloc > void std::basic_stringstream< _CharT, _Traits, _Alloc >::str (const __string_type & __s) [inline]

Setting a new buffer.

Parameters

__s The string to use as a new sequence.

Calls rdbuf()->str(s).

Definition at line 841 of file sstream.

Author

Generated automatically by Doxygen for libstdc++ from the source code.
Tue Jul 14 2020 libstdc++