[#FB_LOG_IMPL]
= FB&lowbar;LOG&lowbar;IMPL
:mrdocs:

Helper macro for implementing FB&lowbar;LOG() and FB&lowbar;LOGF()&period;

== Synopsis

Declared in `&lt;folly&sol;logging&sol;Logger&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
#define FB&lowbar;LOG&lowbar;IMPL(logger, level, type, ...)

----

== Description

This macro generally should not be used directly by end users&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *logger*
| The logger identifying the log category&period;
| *level*
| The `folly&colon;&colon;LogLevel` value at which to log&period;
| *type*
| The `LogStreamProcessor` append or format mode&period;
|===


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