[#BloombergLP-bslstl-Function_InvokerUtil_IsFuncInvocable-0e]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/Function_InvokerUtil_IsFuncInvocable-05.adoc[Function_InvokerUtil_IsFuncInvocable]<RET(ARGS...), FUNC>
:relfileprefix: ../../
:mrdocs:

This `struct` template implements a Boolean metafunction that publicly inherits from `bsl::true_type` if an object of the specified `FUNC` type is invocable with the specified `RET` and `ARGS...`, and publicly inherits from `bsl::false_type` otherwise. An object of `FUNC` type is invocable with `RET` and `ARGS...` if it is Lvalue‐Callable with arguments having the types of the `ARGS...`, and returns an object of type explicitly convertible to `RET`. If `RET` is `void`, then any type is considered explicitly convertible to `RET`.

== Synopsis

Declared in `<bslstl_function_invokerutil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class RET,
    class FUNC,
    class... ARGS>
struct xref:BloombergLP/bslstl/Function_InvokerUtil_IsFuncInvocable-05.adoc[Function_InvokerUtil_IsFuncInvocable]<RET(ARGS...), FUNC>
    : xref:BloombergLP/bslstl/Function_InvokerUtil_IsFuncInvocableImp-03.adoc[Function_InvokerUtil_IsFuncInvocableImp<void, RET, FUNC, ARGS...>]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:BloombergLP/bslstl/Function_InvokerUtil_IsFuncInvocableImp-03.adoc[Function_InvokerUtil_IsFuncInvocableImp<void, RET, FUNC, ARGS...>]`
| forward declaration
|===


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