:relfileprefix: ../../
[#std-hash-04-2constructor-01]

= xref:std.adoc[pass:[std]]::xref:std/hash-04.adoc[pass:[hash]]<xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/url.adoc[url]>::hash



== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/url.hpp#L525[boost/url/url.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
constexpr
hash() = default;
----