[#BloombergLP-bdlar-SequenceRef-manipulateAttribute-02]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlar.adoc[bdlar]::xref:BloombergLP/bdlar/SequenceRef.adoc[SequenceRef]::manipulateAttribute
:relfileprefix: ../../../
:mrdocs:

Invoke the specified `manipulator` on the named attribute.

== Synopsis

Declared in `<bdlar_sequenceref.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_MANIPULATOR>
int
manipulateAttribute(
    t_MANIPULATOR& manipulator,
    char const* attributeName,
    int attributeNameLength) const;
----

== Description

Invoke the specified `manipulator` on the (modifiable) attribute indicated by the specified `attributeName` and `attributeNameLength`, supplying `manipulator` with the corresponding attribute information structure. The supplied `manipulator` must be a callable type that can be called as if it had the following signature: ` template <class t_INFO> int manipulator(ATTRIBUTE *refOrValue, const t_INFO& info); ` Return non‐zero value if the attribute is not found, and the value returned from the invocation of `manipulator` otherwise.

== Return Value

non‐zero if not found, otherwise value from `manipulator`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *manipulator*
| callable invoked on the attribute
| *attributeName*
| name of the attribute
| *attributeNameLength*
| length of `attributeName`
|===


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