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### 1271. `CR` undefined in duration operators

Section: 27.5.6 [time.duration.nonmember] Status: C++11 Submitter: Daniel Krügler Opened: 2009-11-21 Last modified: 2016-01-28

Priority: Not Prioritized

View all other issues in [time.duration.nonmember].

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Discussion:

IMO `CR` alone is not really defined (it should be `CR(Rep1, Rep2)`).

[ 2009-12-24 Moved to Tentatively Ready after 5 positive votes on c++std-lib. ]

Proposed resolution:

Change 27.5.6 [time.duration.nonmember] paragraphs 9 and 12:

>     template <class Rep1, class Period, class Rep2>
>       duration<typename common_type<Rep1, Rep2>::type, Period>
>       operator/(const duration<Rep1, Period>& d, const Rep2& s);

> > 9 Returns: `duration<CR(Rep1, Rep2), Period>(d) /= s`.

>     template <class Rep1, class Period, class Rep2>
>       duration<typename common_type<Rep1, Rep2>::type, Period>
>       operator%(const duration<Rep1, Period>& d, const Rep2& s);

> > 12 Returns: `duration<CR(Rep1, Rep2), Period>(d) %= s`.