[#bsl-unary_compose-operator_call-07]
= xref:bsl.adoc[bsl]::xref:bsl/unary_compose.adoc[unary&lowbar;compose]::operator()
:relfileprefix: ../../
:mrdocs:

Same as the preceding overload&period;

== Synopsis

Declared in `&lt;bslstp&lowbar;exfunctional&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/unary_compose/result_type.adoc[result&lowbar;type]
operator()(xref:bsl/unary_compose/argument_type.adoc[argument&lowbar;type]& x) const;
----

== Return Value

result of `d&lowbar;fn1(d&lowbar;fn2(x))`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *x*
| argument passed to the inner functor
|===


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