[#BloombergLP-ball-Rule-2constructor-01]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/Rule.adoc[Rule]::Rule
:relfileprefix: ../../../
:mrdocs:

Create a `Rule` object whose pattern is an empty string and whose thresholds levels are all 0. Optionally specify a `basicAllocator` used to supply memory. If `basicAllocator` is 0, the currently installed default allocator will be used. Note that a newly created `Rule` object does not have any attributes.

== Synopsis

Declared in `<ball_rule.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
Rule(xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* basicAllocator = 0);
----


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