[#BloombergLP-bslmf-InvokeResult_Index-fromVal-07]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmf.adoc[bslmf]::xref:BloombergLP/bslmf/InvokeResult_Index.adoc[InvokeResult_Index]::fromVal
:relfileprefix: ../../../
:mrdocs:

Return the index tag for an `unsigned long long` lvalue reference.

== Synopsis

Declared in `<bslmf_invokeresult.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
xref:BloombergLP/bslmf/Tag-0b.adoc[bslmf::Tag<e_ULONG_LONG>]
fromVal(unsigned long long& value);
----

== Return Value

a `Tag` encoding `e_ULONG_LONG` for the argument type

== Parameters

[cols="1,4"]
|===
| Name| Description
| *value*
| lvalue whose type is mapped to an index tag
|===


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