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# std::basic_filebuf::sync

From cppreference.com
< cpp‎ | io‎ | basic filebuf

protected: virtual int sync() |  |

If a put area exists (e.g. the file was opened for writing), calls overflow() to write all pending output to the file.

If a get area exists (e.g. the file was opened for reading), the effect is implementation-defined. Typical implementation may empty out the get area and move the current file position back by the corresponding number of bytes.

### [edit] Parameters

(none)

### [edit] Return value

​0​ in case of success, -1 in case of failure.

### [edit] Notes

`sync()` or its equivalent is implicitly called by close(), seekoff(), and seekpos() and explicitly called by std::basic_streambuf::pubsync()

### [edit] Example

| This section is incomplete Reason: no example

### [edit] See also

pubsync | invokes sync() (public member function of `std::basic_streambuf`) [edit]
fflush | synchronizes an output stream with the actual file (function) [edit]

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- Todo no example