[#bsl-get_if-0b]
= xref:bsl.adoc[bsl]::get_if
:relfileprefix: ../
:mrdocs:

`get_if` overloads

== Synopses

Declared in `<bslstl_variant.h>`

Return a pointer to the `t_TYPE` alternative in `obj` if active.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class t_TYPE,
    class t_HEAD,
    class... t_TAIL>
add_pointer<t_TYPE>::type
xref:bsl/get_if-06.adoc[get_if](xref:bsl/variant.adoc[variant<t_HEAD, t_TAIL...>]* obj) noexcept;
----

[.small]#xref:bsl/get_if-06.adoc[_» more..._]#

Return a pointer to the alternative at index `t_INDEX`, or null.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    std::size_t t_INDEX,
    class t_HEAD,
    class... t_TAIL>
add_pointer<variant_alternative<t_INDEX, variant<t_HEAD, t_TAIL...>>::type>::type
xref:bsl/get_if-0a.adoc[get_if](xref:bsl/variant.adoc[variant<t_HEAD, t_TAIL...>]* obj) noexcept;
----

[.small]#xref:bsl/get_if-0a.adoc[_» more..._]#

Return a pointer to the `t_TYPE` alternative in `obj` if active.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class t_TYPE,
    class t_HEAD,
    class... t_TAIL>
add_pointer<t_TYPE const>::type
xref:bsl/get_if-09.adoc[get_if](xref:bsl/variant.adoc[variant<t_HEAD, t_TAIL...>] const* obj) noexcept;
----

[.small]#xref:bsl/get_if-09.adoc[_» more..._]#

Return a pointer to the alternative at index `t_INDEX` in `obj`, or null.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    std::size_t t_INDEX,
    class t_HEAD,
    class... t_TAIL>
add_pointer<variant_alternative<t_INDEX, variant<t_HEAD, t_TAIL...>>::type const>::type
xref:bsl/get_if-0d.adoc[get_if](xref:bsl/variant.adoc[variant<t_HEAD, t_TAIL...>] const* obj) noexcept;
----

[.small]#xref:bsl/get_if-0d.adoc[_» more..._]#

== Return Value

* pointer to the active `t_TYPE`, or null if inactive
* pointer to the alternative at `t_INDEX`, or null
* const pointer to the alternative at `t_INDEX`, or null

== Parameters

[cols="1,4"]
|===
| Name| Description
| *obj*
| variant to query
|===


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