[#header_unordered_flat_set_fwd]
== `<boost/unordered/unordered_flat_set_fwd.hpp>` Synopsis

:idprefix: header_unordered_flat_set_fwd_

Forward declares all the definitions in
xref:reference/header_unordered_flat_set.adoc[`<boost/unordered/unordered_flat_set.hpp>`].