std::basic_spanbuf<CharT,Traits>::setbuf
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< cpp | io | basic spanbuf
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std::basic_spanbuf
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basic_spanbuf::setbuf
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protected:
std::basic_streambuf <CharT, Traits>* setbuf( CharT *s, std::streamsize n ) override;
(since C++23)
std::basic_streambuf <CharT, Traits>* setbuf( CharT *s, std::streamsize n ) override;
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.
Contents
[edit] Parameters
s
-
pointer to the first
CharT in the user-provided buffer
n
-
the number of
CharT elements in the user-provided buffer
[edit] Return value
this
[edit] 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.
[edit] Example
This section is incomplete
Reason: no example
Reason: no example
[edit] See also
[virtual]
(virtual protected member function of
std::basic_stringbuf<CharT,Traits,Allocator>) [edit]