1013. Remove IsSameType hold-over constraints

Section: 28.7.8 [alg.min.max] Status: NAD Editorial Submitter: Alisdair Meredith Opened: 2009-03-11 Last modified: 2016-02-10

Priority: Not Prioritized

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View all issues with NAD Editorial status.

Discussion:

Addresses UK 305

The negative requirement on IsSameType is a hold-over from an earlier draught with a variadic template form of min/max algorith. It is no longer necessary.

[ Batavia (2009-05): ]

We agree with the proposed resolution. Move to Tentatively Ready.

[ 2009-07 Frankfurt ]

We believe this is NAD, but this needs to be reviewed against the post-remove-concepts draft.

Proposed resolution:

Change 28 [algorithms]:

template<class T, StrictWeakOrder<auto, T> Compare>
  requires !SameType<T, Compare> && CopyConstructible<Compare>
  const T& min(const T& a, const T& b, Compare comp);
...
template<class T, StrictWeakOrder<auto, T> Compare>
  requires !SameType<T, Compare> && CopyConstructible<Compare>
  const T& max(const T& a, const T& b, Compare comp);
...
template<class T, StrictWeakOrder<auto, T> Compare>
  requires !SameType<T, Compare> && CopyConstructible<Compare>
  pair<const T&, const T&> minmax(const T& a, const T& b, Compare comp);

Change 28.7.8 [alg.min.max], p1, p9 and p17:

template<class T, StrictWeakOrder<auto, T> Compare>
  requires !SameType<T, Compare> && CopyConstructible<Compare>
  const T& min(const T& a, const T& b, Compare comp);
...
template<class T, StrictWeakOrder<auto, T> Compare>
  requires !SameType<T, Compare> && CopyConstructible<Compare>
  const T& max(const T& a, const T& b, Compare comp);
...
template<class T, StrictWeakOrder<auto, T> Compare>
  requires !SameType<T, Compare> && CopyConstructible<Compare>
  pair<const T&, const T&> minmax(const T& a, const T& b, Compare comp);