[#boost-urls-ipv6_address-max_str_len]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/ipv6_address.adoc[ipv6&lowbar;address]::max&lowbar;str&lowbar;len
:relfileprefix: ../../../
:mrdocs:

The number of characters in the longest possible IPv6 string&period;

== Synopsis

Declared in `&lt;https://www.github.com/boostorg/url/blob/develop/include/boost/url/ipv6_address.hpp#Lundefined[boost&sol;url&sol;ipv6&lowbar;address&period;hpp]&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
inline constexpr static
std::size&lowbar;t max&lowbar;str&lowbar;len = 49;
----

== Description

The longest IPv6 address is&colon;

[,cpp]
----
ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
----
== See Also

xref:boost/urls/ipv6_address/to_buffer.adoc[`to&lowbar;buffer`]&period;


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