[#BloombergLP-bdlf-MemFnInstance-operator_call-02]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlf.adoc[bdlf]::xref:BloombergLP/bdlf/MemFnInstance.adoc[MemFnInstance]::operator()
:relfileprefix: ../../../
:mrdocs:

Invoke the held member function with one argument.

== Synopsis

Declared in `<bdlf_memfn.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bdlf/MemFnInstance/ResultType.adoc[MemFnInstance<PROTOTYPE, INSTANCE>::ResultType]
operator()(xref:BloombergLP/bdlf/MemFnInstance.adoc[ARG1] arg1) const;
----

== Description

Invoke the member function pointer held by this wrapper on the provided object with the specified `arg1` as an argument, and return the result of this invocation, or `void` if this member function pointer does not return a result.

== Return Value

result of the member‐function invocation

== Parameters

[cols="1,4"]
|===
| Name| Description
| *arg1*
| first argument
|===


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