[#BloombergLP-ball-StreamObserver-2constructor]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/StreamObserver.adoc[StreamObserver]::StreamObserver
:relfileprefix: ../../../
:mrdocs:

Create a stream observer that transmits log records to the specified `stream`. Optionally specify an `allocator` (e.g., the address of a `bslma::Allocator` object) to supply memory; otherwise, the default allocator is used. Note that a default record format is in effect for stream logging (see `logRecordDefault`).

== Synopsis

Declared in `<ball_streamobserver.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
StreamObserver(
    std::ostream* stream,
    xref:BloombergLP/ball/StreamObserver/allocator_type.adoc[allocator_type] const& allocator = allocator_type());
----


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