[#BloombergLP-bslstl-Function_InvokerUtil_IsFuncInvocable-0e]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/Function_InvokerUtil_IsFuncInvocable-05.adoc[Function&lowbar;InvokerUtil&lowbar;IsFuncInvocable]&lt;RET(ARGS&period;&period;&period;), FUNC&gt;
:relfileprefix: ../../
:mrdocs:

This `struct` template implements a Boolean metafunction that publicly inherits from `bsl&colon;&colon;true&lowbar;type` if an object of the specified `FUNC` type is invocable with the specified `RET` and `ARGS&period;&period;&period;`, and publicly inherits from `bsl&colon;&colon;false&lowbar;type` otherwise&period; An object of `FUNC` type is invocable with `RET` and `ARGS&period;&period;&period;` if it is Lvalue&hyphen;Callable with arguments having the types of the `ARGS&period;&period;&period;`, and returns an object of type explicitly convertible to `RET`&period; If `RET` is `void`, then any type is considered explicitly convertible to `RET`&period;

== Synopsis

Declared in `&lt;bslstl&lowbar;function&lowbar;invokerutil&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;
    class RET,
    class FUNC,
    class&period;&period;&period; ARGS&gt;
struct xref:BloombergLP/bslstl/Function_InvokerUtil_IsFuncInvocable-05.adoc[Function&lowbar;InvokerUtil&lowbar;IsFuncInvocable]&lt;RET(ARGS&period;&period;&period;), FUNC&gt;
    : xref:BloombergLP/bslstl/Function_InvokerUtil_IsFuncInvocableImp-03.adoc[Function&lowbar;InvokerUtil&lowbar;IsFuncInvocableImp&lt;void, RET, FUNC, ARGS&period;&period;&period;&gt;]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:BloombergLP/bslstl/Function_InvokerUtil_IsFuncInvocableImp-03.adoc[Function&lowbar;InvokerUtil&lowbar;IsFuncInvocableImp&lt;void, RET, FUNC, ARGS&period;&period;&period;&gt;]`
| forward declaration
|===


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