[#DataStream-m_read_pos]
= xref:DataStream.adoc[DataStream]::m&lowbar;read&lowbar;pos
:relfileprefix: ../
:mrdocs:

Offset of the first unread byte within vch&period;

== Synopsis

Declared in `&lt;streams&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
vector&lowbar;type::size&lowbar;type m&lowbar;read&lowbar;pos = &lcub;0&rcub;;
----


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