mp_units::value_cast

Explicit cast of a quantity's representation type

Synopsis

Declared in <mp-units/framework/value_cast.h>
template<
    typename ToRep,
    typename FwdQ,
    Quantity Q = std::remove_cvref_t<FwdQ>>
requires RepresentationOf<ToRep, Q::quantity_spec> && std::constructible_from<ToRep, typename Q::rep>
[[nodiscard]]
constexpr
quantity<Q::reference, ToRep>
value_cast(FwdQ&& q);

Description

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

auto q = value_cast<int>(1.23 ms);

Return Value

A quantity

Template Parameters

Name Description
ToRep a representation type to use for a target quantity

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