[#VectorWriter-2constructor-07]
= xref:VectorWriter.adoc[VectorWriter]::VectorWriter
:relfileprefix: ../
:mrdocs:

Constructors

== Synopses

Declared in `<streams.h>`

Construct a writer that overwrites and/or appends to an existing byte vector.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:VectorWriter/2constructor-04.adoc[VectorWriter](
    std::vector<unsigned char>& vchDataIn,
    size_t nPosIn);
----

[.small]#xref:VectorWriter/2constructor-04.adoc[_» more..._]#

Construct a writer and immediately serialize the given items into the vector.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename... Args>
xref:VectorWriter/2constructor-0e.adoc[VectorWriter](
    std::vector<unsigned char>& vchDataIn,
    size_t nPosIn,
    Args&&... args);
----

[.small]#xref:VectorWriter/2constructor-0e.adoc[_» more..._]#

== Parameters

[cols="1,4"]
|===
| Name| Description
| *vchDataIn*
| Referenced byte vector to overwrite/append.
| *nPosIn*
| Starting position; vector index where writes should start. The vector will initially grow as necessary to max(nPosIn, vec.size()). So to append, use vec.size().
| *args*
| Items to serialize into the vector starting at nPosIn.
|===


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