2.3 KiB
[numeric.ops.midpoint]
26 Algorithms library [algorithms]
26.10 Generalized numeric operations [numeric.ops]
26.10.16 Midpoint [numeric.ops.midpoint]
template<class T> constexpr T midpoint(T a, T b) noexcept;
Constraints: T is an arithmetic type other than bool.
Returns: Half the sum of a and b.
If T is an integer type and the sum is odd, the result is rounded towards a.
Remarks: No overflow occurs.
If T is a floating-point type, at most one inexact operation occurs.
template<class T> constexpr T* midpoint(T* a, T* b);
Constraints: T is an object type.
Mandates: T is a complete type.
Preconditions: a and b point to, respectively, elements i and j of the same array object x.
[Note 1:
As specified in [basic.compound], an object that is not an array element is considered to belong to a single-element array for this purpose and a pointer past the last element of an array of n elements is considered to be equivalent to a pointer to a hypothetical array element n for this purpose.
â end note]
Returns: A pointer to array element i+jâi2 of x, where the result of the division is truncated towards zero.