void emit(); |
Emits all buffered output and executes any pending flushes, by calling emit() on the underlying std::basic_syncbuf.
(none).
#include <syncstream>
#include <iostream>
int main()
{
{
std::osyncstream bout(std::cout);
std::bout << "Hello," << '\n'; // no flush
std::bout.emit(); // characters transferred; cout not flushed
std::bout << "World!" << std::endl; // flush noted; cout not flushed
std::bout.emit(); // characters transferred; cout flushed
std::bout << "Greetings." << '\n'; // no flush
} // destructor calls emit(): characters transferred; cout not flushed
// emit can be used for local exception-handling on the wrapped stream
std::osyncstream bout(std::cout);
bout << "Hello, " << "World!" << '\n';
try {
bout.emit();
} catch (...) {
// handle exceptions
}
}Output:
Hello, World! Greetings. Hello, World!
| destroys the basic_osyncstream and emits its internal buffer (public member function) |
|
| atomically transmits the entire internal buffer to the wrapped streambuf (public member function of std::basic_syncbuf) |
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