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

Manipulates the buffer.

== Synopsis

Declared in `<bslstl_syncbuf.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
basic_streambuf<char_type, _Traits>*
setbuf(
    char_type*,
    streamsize);
----

== Description

Each derived class provides its own appropriate behavior. See the next‐to‐last paragraph of https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html#io.streambuf.buffering for more on this function.

[NOTE]
====
Base class version does nothing, returns `this.`

====


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