28 Algorithms library [algorithms]

28.7 Sorting and related operations [alg.sorting]

28.7.9 Bounded value [alg.clamp]

template<class T> constexpr const T& clamp(const T& v, const T& lo, const T& hi); template<class T, class Compare> constexpr const T& clamp(const T& v, const T& lo, const T& hi, Compare comp);

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Requires: The value of lo shall be no greater than hi. For the first form, type T shall be LessThanComparable.

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Returns: lo if v is less than lo, hi if hi is less than v, otherwise v.

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[ Note: If NaN is avoided, T can be a floating-point type.  — end note ]

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Complexity: At most two comparisons.