[#BloombergLP-bdljsn-Json_VisitUtil-invokeVisitor-02]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdljsn.adoc[bdljsn]::xref:BloombergLP/bdljsn/Json_VisitUtil.adoc[Json_VisitUtil]::invokeVisitor
:relfileprefix: ../../../
:mrdocs:

Invoke `visitor` with `argument` and return the result.

== Synopsis

Declared in `<bdljsn_json.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class RETURN_TYPE,
    class VISITOR,
    class ARGUMENT>
static
RETURN_TYPE
invokeVisitor(
    VISITOR* visitor,
    ARGUMENT const& argument);
----

== Description

Invoke the specified `visitor` (callable object) with the specified `argument` and return the computed value of (template parameter) the `RETURN_TYPE`. Note that in typical use, `argument` has the current value and type of a `Json` object.

== Return Value

the value returned by invoking `visitor` with `argument`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *visitor*
| callable to invoke
| *argument*
| value passed to `visitor`
|===


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