std::emit_on_flush, std::noemit_on_flush

< cpp‎ | io‎ | manip
Input/output manipulators
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Quoted manipulator
Defined in header <ostream>
template< class CharT, class Traits >
std::basic_ostream<CharT, Traits>& emit_on_flush( std::basic_ostream<CharT, Traits>& os );
(1) (since C++20)
template< class CharT, class Traits >
std::basic_ostream<CharT, Traits>& noemit_on_flush( std::basic_ostream<CharT, Traits>& os );
(2) (since C++20)

If os.rdbuf() actually points to a std::basic_syncbuf<CharT, Traits, Allocator> buf, toggles whether it emits (i.e., transmits data to the underlying stream buffer) when flushed:

1) calls buf.set_emit_on_sync(true)
2) calls buf.set_emit_on_sync(false)

Otherwise, these manipulators have no effect.

This is an output-only I/O manipulator, it may be called with an expression such as out << std::emit_on_flush for any out of type std::basic_ostream.


[edit] Parameters

os - reference to output stream

[edit] Return value

os (reference to the stream after manipulation)

[edit] Example

[edit] See also

changes the current emit-on-sync policy
(public member function of std::basic_syncbuf<CharT,Traits,Allocator>) [edit]