[#bsl-basic_syncbuf-overflow-09]
= xref:bsl.adoc[bsl]::xref:bsl/basic_syncbuf.adoc[basic_syncbuf]::overflow
:relfileprefix: ../../
:mrdocs:

Append the specified `character` to the internal buffer.

== Synopsis

Declared in `<bslstl_syncbuf.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/basic_syncbuf/int_type.adoc[basic_syncbuf<CHAR, TRAITS, ALLOCATOR>::int_type]
overflow(xref:bsl/basic_syncbuf/int_type.adoc[int_type] character = traits_type::eof()) override;
----

== Description

Append the specified `character` to the internal buffer, or do nothing if `traits_type::eof()` is passed.

== Return Value

the written character, or `traits_type::eof()` if `character` is `eof`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *character*
| character to append, or `traits_type::eof()`
|===


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