[#BloombergLP-bslx-ByteOutStream-2constructor-00]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslx.adoc[bslx]::xref:BloombergLP/bslx/ByteOutStream.adoc[ByteOutStream]::ByteOutStream
:relfileprefix: ../../../
:mrdocs:

Create an empty output byte stream with the specified initial capacity&period;

== Synopsis

Declared in `&lt;bslx&lowbar;byteoutstream&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
ByteOutStream(
    int versionSelector,
    std::size&lowbar;t initialCapacity,
    xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* basicAllocator = 0);
----

== Description

Create an empty output byte stream having an initial buffer capacity of at least the specified `initialCapacity` (in bytes) and that will use the specified (_compile_&hyphen;time&hyphen;defined) `versionSelector` as needed (see &lcub;Versioning&rcub;)&period; Optionally specify a `basicAllocator` used to supply memory&period; If `basicAllocator` is 0, the currently installed default allocator is used&period; Note that the `versionSelector` is expected to be formatted as &quot;YYYYMMDD&quot;, a date representation&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *versionSelector*
| BDEX version selector (typically &quot;YYYYMMDD&quot;)
| *initialCapacity*
| initial buffer capacity, in bytes
| *basicAllocator*
| memory allocator&semi; null uses the default
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#
