[#BloombergLP-bslstl-Variant_VTable-09]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::Variant_VTable
:relfileprefix: ../../
:mrdocs:

This component‐private struct computes an array in which element `i` is a pointer to `Variant_Function<t_RET, t_VISITOR, t_VARIANT, i>::functionImpl`, defined above as a function that invokes a `t_VISITOR` with alternative `i` of `t_VARIANT` and implicitly converts the return type to `t_RET`.

== Synopsis

Declared in `<bslstl_variant.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class t_RET,
    class t_VISITOR,
    class t_VARIANT,
    class t_DUMMY>
struct Variant_VTable;
----

== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslstl/Variant_VTable-04.adoc[`Variant_VTable<t_RET, t_VISITOR, t_VARIANT, bslmf::IntegerSequence<std::size_t, t_INDICES...>>`] 
| In order to allow for perfect forwarding, both t_VISITOR and t_VARIANT must be of reference type. If they are not, something went wrong.
|===



[.small]#Created with https://www.mrdocs.com[MrDocs]#