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

This component‐private struct is used to check whether an alternative given by (template parameter) `t_TYPE` is a potential match for an argument of a `bsl::variant` constructor or assignment operator that does not take an explicitly specified alternative type. The standard allows such conversion only when the declaration `t_TYPE d_x[]= {expr};` is valid, where `expr` is the (forwarded) argument expression.

== Synopsis

Declared in `<bslstl_variant.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_TYPE>
struct Variant_ArrayHelper;
----

== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslstl/Variant_ArrayHelper/d_x.adoc[`d_x`] 
| Array used to test narrowing conversions during overload resolution.
|===



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