[#bsl-basic_stringbuf-overflow-0c]
= xref:bsl.adoc[bsl]::xref:bsl/basic_stringbuf.adoc[basic_stringbuf]::overflow
:relfileprefix: ../../
:mrdocs:

Append a character to the output sequence.

== Synopsis

Declared in `<bslstl_stringbuf.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
xref:bsl/basic_stringbuf/int_type.adoc[basic_stringbuf<CHAR_TYPE, CHAR_TRAITS, ALLOCATOR>::int_type]
overflow(xref:bsl/basic_stringbuf/int_type.adoc[int_type] character = traits_type::eof());
----

== Description

Append the specified `character` to the output sequence of this stream buffer at the current output position (`pptr`), and advance the output position by one. This operation may update the end of output area (`epptr`) to allow for additional writes (e.g., by the base `basic_streambuf` type) to the output sequence without calling a method on this type. Return the written character on success, and `traits_type::eof()` if `character` is `traits_type::eof()` or this stream buffer was not opened for writing.


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