std::basic_spanbuf<CharT,Traits>::span
|
(1) | (since C++23) |
|
(2) | (since C++23) |
1) Gets a
span referencing the written area if std::ios_base::out is set in the open mode, or a span referencing the underlying buffer otherwise.
2) Makes the
basic_spanbuf perform I/O on the buffer referenced by s. Sets pointers to get area, put area, or both.
| Set bits in open mode (affecting pointers to get area) |
Return value after setting | ||
|---|---|---|---|
eback() |
gptr() |
egptr() |
|
std::ios_base::in |
s.data() |
s.data() |
s.data() + s.size() |
| 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.data() |
s.data() |
s.data() + s.size() |
std::ios_base::out && std::ios_base::ate |
s.data() |
s.data() + s.size() |
s.data() + s.size() |
Parameters
| s | - | a std::span that references the user-provided buffer |
Return value
1)
std::span<CharT>(pbase(), pptr()) if std::ios_base::out is set in the open mode, or a std::span<CharT> that references the whole underlying buffer otherwise.
2) (none)
Example
See also
| replaces or obtains a copy of the associated character string (public member function of std::basic_stringbuf<CharT,Traits,Allocator>) |
|
|
(C++20)
|
obtains a view over the underlying character sequence (public member function of std::basic_stringbuf<CharT,Traits,Allocator>) |
| marks the buffer frozen and returns the beginning pointer of the input sequence (public member function of std::strstreambuf) |
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