[#BCLog-Logger-PushBackCallback]
= xref:BCLog.adoc[BCLog]::xref:BCLog/Logger.adoc[Logger]::PushBackCallback
:relfileprefix: ../../
:mrdocs:

Connect a slot to the print signal and return the connection

== Synopsis

Declared in `<logging.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[requires_capability(0x7f2e43eec978)]]
std::list<std::function<void(std::string const&)>>::iterator
PushBackCallback(std::function<void(std::string const&)> fun);
----

== Return Value

An iterator identifying the registered callback, for later removal.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *fun*
| The callback invoked with each formatted log string.
|===


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