std::basic_spanbuf<CharT,Traits>:: setbuf

protected : std:: basic_streambuf < CharT, Traits > * setbuf ( CharT * s, std:: streamsize n ) override ;		(since C++23)

Makes the basic_spanbuf perform I/O on the buffer [ s , s + n ) . Equivalently calls this - > span ( std:: span < CharT > ( s, n ) ) and then returns this .

Set bits in open mode (affecting pointers to get area)	Return value after setting
	eback()	gptr()	egptr()
std:: ios_base :: in	s	s	s + n
Set bits in open mode (affecting pointers to put area)	Return value after setting
	pbase()	pptr()	epptr()
std:: ios_base :: out && ! std:: ios_base :: ate	s	s	s + n
std:: ios_base :: out && std:: ios_base :: ate	s	s + n	s + n

This function is protected virtual, it may only be called through pubsetbuf() or from member functions of a user-defined class derived from std::basic_spanbuf .

Parameters

s	-	pointer to the first CharT in the user-provided buffer
n	-	the number of CharT elements in the user-provided buffer

Return value

this

Notes

The deprecated stream buffer std::strstreambuf or the boost.IOStreams device boost::basic_array can also implement I/O buffering over a user-provided char array.

Example

This section is incomplete Reason: no example

See also

pubsetbuf	invokes setbuf ( ) (public member function of std::basic_streambuf<CharT,Traits> )
setbuf [virtual]	attempts to replace the controlled character sequence with an array (virtual protected member function of std::basic_stringbuf<CharT,Traits,Allocator> )
setbuf [virtual]	attempts to replace the controlled character sequence with an array (virtual protected member function of std::strstreambuf )