[#StdChronoDuration]
= StdChronoDuration
:mrdocs:

A concept for C&plus;&plus; std&colon;&colon;chrono durations&period;

== Synopsis

Declared in `&lt;random&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;typename T&gt;
concept StdChronoDuration = requires &lcub;
    &lsqb;&rsqb;&lt;class Rep, class Period&gt;(std&colon;&colon;type&lowbar;identity&lt;std&colon;&colon;chrono&colon;&colon;duration&lt;Rep, Period&gt;&gt;)&lcub;&rcub;(
        std&colon;&colon;type&lowbar;identity&lt;T&gt;())&semi;
&rcub;;
----


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