Explicit cast of a quantity point's representation type

Synopsis

Declared in <mp‐units/framework/value_cast.h>

template<
    typename ToRep,
    typename FwdQP,
    QuantityPoint QP = std::remove_cvref_t<FwdQP>>
requires RepresentationOf<ToRep, QP::quantity_spec> && std::constructible_from<ToRep, typename QP::rep>
[[nodiscard]]
constexpr
quantity_point<QP::reference, QP::point_origin, ToRep>
value_cast(FwdQP&& qp);

Description

Implicit conversions between quantity points of different types are allowed only for "safe" (e.g. non‐truncating) conversion. In truncating cases an explicit cast have to be used.

auto qp = value_cast<int>(quantity_point{1.23 * ms});

Return Value

A quantity point

Template Parameters

Name

Description

ToRep

a representation type to use for a target quantity point

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