[#boost-urls-format_to-09]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::format_to
:relfileprefix: ../../
:mrdocs:


== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/format.hpp#L225[boost/url/format.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<std::convertible_to<xref:boost/urls/format_arg.adoc[format_arg]>... Args>
void
xref:boost/urls/format_to-02.adoc[format_to](
    xref:boost/urls/url_base.adoc[url_base]& u,
    core::string_view fmt,
    Args&&... args);
----

[.small]#xref:boost/urls/format_to-02.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
xref:boost/urls/format_to-0b.adoc[format_to](
    xref:boost/urls/url_base.adoc[url_base]& u,
    core::string_view fmt,
    std::initializer_list<xref:boost/urls/format_arg.adoc[format_arg]> args);
----

[.small]#xref:boost/urls/format_to-0b.adoc[_» more..._]#

== Exceptions


|===
| Name | Thrown on

| `system_error`
| `fmt` contains an invalid format string and    `u` contains an invalid URL after replacements    are applied.


|===

== Parameters


|===
| Name | Description

| *u*
| An object that derives from xref:boost/urls/url_base.adoc[url_base].


| *fmt*
| The format URL string.


| *args*
| Arguments to be formatted.


|===



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