[#BloombergLP-baljsn-EncoderOptions-accessAttribute-04]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/baljsn.adoc[baljsn]::xref:BloombergLP/baljsn/EncoderOptions.adoc[EncoderOptions]::accessAttribute
:relfileprefix: ../../../
:mrdocs:

Invoke `accessor` on the non‐modifiable attribute indicated by `id`.

== Synopsis

Declared in `<baljsn_encoderoptions.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class ACCESSOR>
int
accessAttribute(
    ACCESSOR& accessor,
    int id) const;
----

== Description

Invoke the specified `accessor` on the (non‐modifiable) attribute of this object indicated by the specified `id`, supplying `accessor` with the corresponding attribute information structure. Return the value returned from the invocation of `accessor` if `id` identifies an attribute of this class, and ‐1 otherwise.

== Return Value

value returned by `accessor`, or ‐1 if `id` is not found

== Parameters

[cols="1,4"]
|===
| Name| Description
| *accessor*
| functor invoked on the matching attribute
| *id*
| attribute id
|===


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