Constructors

Synopses

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

Default constructor. Leaves the underlying quantity default‐initialized.

[[nodiscard]]
quantity_point() = default;

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Converting constructor from a quantity point anchored to a different absolute point origin.

template<QuantityPoint QP>
requires (!QuantityPointOf<QP, absolute_point_origin>) && requires(const QP& src) {
      { src.point_for(point_origin) } ‐> QuantityPointOf<point_origin>;
      quantity_type{src.point_for(point_origin) ‐ point_origin};
    }
[[nodiscard]]
constexpr
explicit
quantity_point(QP const& qp);

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Constructs a quantity point from an external quantity‐point‐like type via quantity_point_like_traits.

template<QuantityPointLike QP>
requires (quantity_point_like_traits<QP>::point_origin == point_origin) &&
            std::constructible_from<quantity_type, quantity<quantity_point_like_traits<QP>::reference,
                                                            typename quantity_point_like_traits<QP>::rep>>
[[nodiscard]]
constexpr
explicit(quantity_point_like_traits<QP>::explicit_import || !std::convertible_to<quantity<quantity_point_like_traits<QP>::reference, typename quantity_point_like_traits<QP>::rep>, quantity_type>)
quantity_point(QP const& qp);

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Converting constructor from another quantity point that shares this one's absolute point origin.

template<QuantityPointOf<absolute_point_origin> QP>
requires std::constructible_from<quantity_type, typename QP::quantity_type>
[[nodiscard]]
constexpr
explicit(!std::convertible_to<typename QP::quantity_type, quantity_type>)
quantity_point(QP const& qp);

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Constructs a quantity point from a quantity, measured from the default point origin.

template<
    typename FwdQ,
    QuantityOf<quantity_spec> Q = std::remove_cvref_t<FwdQ>>
requires std::constructible_from<quantity_type, FwdQ> && (point_origin == default_point_origin®)
[[nodiscard]]
constexpr
explicit
quantity_point(FwdQ&& q);

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Constructs a quantity point from a quantity measured from this point's own origin.

template<
    typename FwdQ,
    QuantityOf<quantity_spec> Q = std::remove_cvref_t<FwdQ>>
requires std::constructible_from<quantity_type, FwdQ>
[[nodiscard]]
constexpr
quantity_point(
    FwdQ&& q,
    decltype(PO) po);

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Constructs a quantity point from a quantity measured from another point origin that shares this one's absolute point origin.

template<
    typename FwdQ,
    PointOrigin PO2,
    Quantity Q = std::remove_cvref_t<FwdQ>>
requires PointOriginFor<PO2, Q::quantity_spec> && std::constructible_from<quantity_type, FwdQ> &&
             detail::SameAbsolutePointOriginAs<PO2, PO>
[[nodiscard]]
constexpr
quantity_point(
    FwdQ&& q,
    PO2 po);

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Return Value

Note

The return value should not be discarded.

Parameters

Name

Description

qp

the source quantity point to convert from

q

the quantity giving the offset from point_origin

po

the point origin the quantity is measured from, equal to point_origin

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