NAME¶

std::basic_filebuf::overflow - std::basic_filebuf::overflow

Synopsis¶

protected:
virtual int_type overflow ( int_type c = Traits::eof() );

Writes some data from the put area to the associated character sequence (to the
file).

Behaves like the base class std::basic_streambuf::overflow, except that to write the
data, first uses std::codecvt::out of the imbued locale to convert the characters
into external (possibly multibyte) representation, stored in a temporary buffer
(allocated as large as necessary), then uses file I/O to copy all fully-converted
bytes into the file.

If std::codecvt::always_noconv is true, the call to std::codecvt::out may be
skipped.

If the conversion fails with std::codecvt_base::error, returns Traits::eof() without
attempting any output.

If the associated file is not open (is_open() == false), returns Traits::eof()
before doing anything.

Parameters¶

(none)

Return value¶

Traits::not_eof(c) to indicate success or Traits::eof() to indicate failure.

Example¶

This section is incomplete
Reason: no example

See also¶

overflow writes characters to the associated output sequence from the put area
[virtual] (virtual protected member function of std::basic_streambuf<CharT,Traits>)
underflow reads from the associated file
[virtual] (virtual protected member function)