[#boost-urls-url_base-capacity]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/url_base.adoc[url_base]::capacity
:relfileprefix: ../../../
:mrdocs:


Return the number of characters that can be stored without reallocating

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/url_base.hpp#L147[boost/url/url_base.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::size_t
capacity() const noexcept;
----

== Description


This does not include the null terminator,        which is always present.


=== Complexity

Constant.


=== Exception Safety

Throws nothing.





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