[#btcsignals-null_value]
= xref:btcsignals.adoc[btcsignals]::null_value
:relfileprefix: ../
:mrdocs:

The default combiner, which only returns void.

== Synopsis

Declared in `<util/btcsignals.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class null_value;
----

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:btcsignals/null_value/result_type.adoc[`result_type`] 
| The result type produced by this combiner, which is always void.
|===



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