[#bsl-holds_alternative]
= xref:bsl.adoc[bsl]::holds_alternative
:relfileprefix: ../
:mrdocs:

Return `true` if the specified `obj` currently holds the (template parameter) `t_TYPE` alternative, and `false` otherwise. `t_TYPE` shall appear exactly once in the variant's list of alternatives.

== Synopsis

Declared in `<bslstl_variant.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class t_TYPE,
    class t_HEAD,
    class... t_TAIL>
bool
holds_alternative(xref:bsl/variant.adoc[variant<t_HEAD, t_TAIL...>] const& obj) noexcept;
----


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