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### 2912. Add a deduction guide for class template `duration`

Section: 29.5 [time.duration] Status: Resolved Submitter: United States Opened: 2017-02-03 Last modified: 2020-09-06

Priority: Not Prioritized

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Discussion:

Addresses US 144

Proposed change:

Add to `<chrono>` synopsis:

>     template <class Rep, class Period>
>     duration(const Rep &) -> duration<Rep>;

[2017-02-21; via email]

This should be addressed by P0433R2.

[2017-03-12, post-Kona]

Resolved by P0433R2.

Proposed resolution:

This wording is relative to N4618.

1. Add to the synopsis of `<chrono>`:

   >     template <class Rep, class Period> duration(const Rep &) -> duration<Rep>;