[#BloombergLP-bslmf-InvokeResult_FunctorImp-06]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmf.adoc[bslmf]::xref:BloombergLP/bslmf/InvokeResult_FunctorImp-0e.adoc[InvokeResult_FunctorImp]<bslmf::VoidType<decltype(InvokeResult_ImpUtils::myDeclval<t_FN>()(
                    InvokeResult_ImpUtils::myDeclval<t_ARGTYPES>()...))>::type, t_FN, t_ARGTYPES...>
:relfileprefix: ../../
:mrdocs:

`invoke_result` for well‐formed functor call `fn(args...)`.

== Synopsis

Declared in `<bslmf_invokeresult.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class t_FN,
    class... t_ARGTYPES>
struct xref:BloombergLP/bslmf/InvokeResult_FunctorImp-0e.adoc[InvokeResult_FunctorImp]<bslmf::VoidType<decltype(InvokeResult_ImpUtils::myDeclval<t_FN>()(
                    InvokeResult_ImpUtils::myDeclval<t_ARGTYPES>()...))>::type, t_FN, t_ARGTYPES...>
    : /* implementation-defined */
----

== Description

Implementation of `invoke_result<t_FN, t_ARGTYPES...>`. This specialization is instantiated in C++11 and later when `t_FN` is neither a pointer‐to‐function, pointer‐to‐member‐function, nor pointer‐to‐member‐object type, and the `INVOKE(fn, args...)` expression is well‐formed given `fn` is an object of the specified `t_FN` type and `args...` are objects of the specified `t_ARGTYPES...` types. The `INVOKE(fn, args...)` expression in this case is `fn(args...)`.

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `/* implementation-defined */`
| Utility metaprogramming functions inherited by other metaprogramming classes.
|===

== Types

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/InvokeResult_FunctorImp-06/AnyLvalue.adoc[`AnyLvalue`] 
| Type convertible from any lvalue type. Used for overload resolution in metafunctions.
| xref:BloombergLP/bslmf/InvokeResult_FunctorImp-06/AnyRvalue.adoc[`AnyRvalue`] 
| Type convertible from any rvalue type. Used for overload resolution in metafunctions.
|===


== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/InvokeResult_FunctorImp-06/type.adoc[`type`] 
| `INVOKE` result type for functor call `fn(args...)`.
|===


== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/InvokeResult_FunctorImp-06/checkConst-0f.adoc[`checkConst`] 
| `checkConst` overloads
| xref:BloombergLP/bslmf/InvokeResult_FunctorImp-06/checkLvalue-08a.adoc[`checkLvalue`] 
| `checkLvalue` overloads
| xref:BloombergLP/bslmf/InvokeResult_FunctorImp-06/checkVolatile-070.adoc[`checkVolatile`] 
| `checkVolatile` overloads
| xref:BloombergLP/bslmf/InvokeResult_FunctorImp-06/myDeclval.adoc[`myDeclval`] 
| Return a `declval` reference for unevaluated metaprogramming.
| xref:BloombergLP/bslmf/InvokeResult_FunctorImp-06/uncv-0c.adoc[`uncv`] 
| `uncv` overloads
| xref:BloombergLP/bslmf/InvokeResult_FunctorImp-06/unpoint-001.adoc[`unpoint`] 
| `unpoint` overloads
|===



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