[#BloombergLP-ball-RuleSet-ruleId]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/RuleSet.adoc[RuleSet]::ruleId
:relfileprefix: ../../../
:mrdocs:

Return the id of the rule having the specified `value` if such a rule exists, and a negative value otherwise.

== Synopsis

Declared in `<ball_ruleset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
ruleId(xref:BloombergLP/ball/Rule.adoc[Rule] const& value) const;
----

== Description

Note that if there are multiple rules having `value`, the id of the first one found will be returned and the order in which rules are searched is implementation dependent.

== Return Value

non‐negative id if found, or a negative value otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *value*
| rule whose id is sought
|===


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