[#BloombergLP-bdlsb-MemOutStreamBuf-overflow]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlsb.adoc[bdlsb]::xref:BloombergLP/bdlsb/MemOutStreamBuf.adoc[MemOutStreamBuf]::overflow
:relfileprefix: ../../../
:mrdocs:

Append the optionally specified `insertionChar` to this stream buffer&apos;s character buffer and return `insertionChar`&period; If `insertionChar` is not specified, `traits&lowbar;type&colon;&colon;eof()` is appended instead&period;

== Synopsis

Declared in `&lt;bdlsb&lowbar;memoutstreambuf&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
int&lowbar;type
overflow(int&lowbar;type insertionChar = bsl&colon;&colon;streambuf&colon;&colon;traits&lowbar;type&colon;&colon;eof()) override;
----


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