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

A temporary reference to a named formatting argument

== Synopsis

Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/format.hpp#L47[boost/url/format.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class T>
using named_arg = /* implementation-defined */;
----

== Description

This class represents a temporary reference to a named formatting argument used by the xref:boost/urls/format-06.adoc[`format`] function.

Named arguments should always be created with the xref:boost/urls/arg.adoc[`arg`] function.

Any type that can be formatted into a URL with the xref:boost/urls/format-06.adoc[`format`] function can also be used in a named argument. All named arguments are convertible to xref:boost/urls/format_arg.adoc[`format_arg`] and can be used in the xref:boost/urls/format-06.adoc[`format`] function.

== See Also

xref:boost/urls/arg.adoc[`arg`], xref:boost/urls/format-06.adoc[`format`], xref:boost/urls/format_to-01.adoc[`format_to`], xref:boost/urls/format_arg.adoc[`format_arg`].


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