[#boost-urls-ipv4_address-is_unspecified]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/ipv4_address.adoc[ipv4&lowbar;address]::is&lowbar;unspecified
:relfileprefix: ../../../
:mrdocs:


Return true if the address is unspecified

== Synopsis


Declared in `&lt;https://www.github.com/boostorg/url/blob/develop/include/boost/url/ipv4_address.hpp#L230[boost&sol;url&sol;ipv4&lowbar;address&period;hpp]&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
is&lowbar;unspecified() const noexcept;
----



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