[#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 */::format_arg;
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== Description


This class represents a temporary reference    to a formatting argument used by the    xref:boost/urls/format-02.adoc[format] function.

A xref:boost/urls/format-02.adoc[format] argument should always be    created by passing the argument to be    formatted directly to the xref:boost/urls/format-02.adoc[format] function.

Any type that can be formatted into a URL    with the xref:boost/urls/format-02.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-02.adoc[format],        xref:boost/urls/format_to-0b.adoc[format_to],        xref:boost/urls/arg.adoc[arg].






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