mp_units::round

Computes the nearest quantity with integer representation and unit type To to q

Synopsis

Declared in <mp-units/math.h>

template<
    Unit auto To,
    auto R,
    typename Rep>
[[nodiscard]]
constexpr
quantity<detail::clone_reference_with<To>(R), Rep>
round(quantity<R, Rep> const& q) noexcept
requires requires {
    mp_units::floor<To>(q);
    representation_values<Rep>::one();
  } && std::constructible_from<std::int64_t, Rep>;

Description

Returns the value res representable in To unit that is the closest to q. If there are two such values, returns the even value (that is, the value res such that res % 2 == 0).

Return Value

Quantity The quantity rounded to the nearest unit To, rounding to even in halfway cases.

Template Parameters

Name	Description
q	Quantity being the base of the operation

Parameters