[#fmt-system_category]
= xref:fmt.adoc[fmt]::system&lowbar;category
:relfileprefix: ../
:mrdocs:

== Synopsis

Declared in `&lt;fmt&sol;os&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::error&lowbar;category const&
system&lowbar;category() noexcept;
----


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