[#BloombergLP-bslmf-Switch4]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmf.adoc[bslmf]::Switch4
:relfileprefix: ../../
:mrdocs:

`switch` meta‐function among four types.

== Synopsis

Declared in `<bslmf_switch.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    size_t t_SWITCH_SELECTOR,
    class t_T0,
    class t_T1,
    class t_T2,
    class t_T3>
using Switch4 = xref:BloombergLP/bslmf/Switch-07a1.adoc[Switch<t_SWITCH_SELECTOR, t_T0, t_T1, t_T2, t_T3>];
----


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