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

Alters the stream positions.

== Synopsis

Declared in `<bslstl_syncbuf.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
pos_type
seekoff(
    off_type,
    ios_base::seekdir,
    ios_base::openmode = ios_base::in | ios_base::out);
----

== Description

Each derived class provides its own appropriate behavior.

[NOTE]
====
Base class version does nothing, returns a `pos_type` that represents an invalid stream position.

====


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