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

A temporary reference to a formatting argument

== Synopsis

Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/format.hpp#L72[boost/url/format.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
using format_arg = /* implementation-defined */;
----

== Description

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

A xref:boost/urls/format-06.adoc[`format`] argument should always be created by passing the argument to be formatted directly to the xref:boost/urls/format-06.adoc[`format`] function.

Any type that can be formatted into a URL with the xref:boost/urls/format-06.adoc[`format`] function is convertible to this type.

This includes basic types, types convertible to `core::string_view`, and xref:boost/urls/named_arg.adoc[`named_arg`].

== See Also

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


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