Division operators

Synopses

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

Divides a unit by a reference

template<Unit U1>
[[nodiscard]]
consteval
/* implementation-defined */
operator/(
    U1 u1,
    reference r);

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Divides a reference by a unit

template<Unit U2>
[[nodiscard]]
consteval
/* implementation-defined */
operator/(
    reference r,
    U2 u2);

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scaled_unit specializations have priority in this operation. This means that the library framework prevents passing it as an element to the derived_unit. In such case only the reference unit is passed to the derived unit and the magnitude remains outside forming another scaled unit as a result of the operation.

template<
    Dimension Lhs,
    Dimension Rhs>
[[nodiscard]]
consteval
Dimension auto
operator/(
    Lhs lhs,
    Rhs rhs);

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scaled_unit specializations have priority in this operation. This means that the library framework prevents passing it as an element to the derived_unit. In such case only the reference unit is passed to the derived unit and the magnitude remains outside forming another scaled unit as a result of the operation.

template<
    Dimension Lhs,
    Dimension Rhs>
[[nodiscard]]
consteval
Dimension auto
operator/(
    Lhs lhs,
    Rhs rhs);

» more...

scaled_unit specializations have priority in this operation. This means that the library framework prevents passing it as an element to the derived_unit. In such case only the reference unit is passed to the derived unit and the magnitude remains outside forming another scaled unit as a result of the operation.

template<
    Dimension Lhs,
    Dimension Rhs>
[[nodiscard]]
consteval
Dimension auto
operator/(
    Lhs lhs,
    Rhs rhs);

» more...

Deleted overload rejecting reference / quantity, which has no defined meaning

template<
    Reference R,
    typename Q>
requires Quantity<std::remove_cvref_t<Q>>
constexpr
auto
operator/(
    R r,
    Q&& q) = delete;

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Deleted overload rejecting reference / representation, which has no defined meaning

template<
    Reference R,
    typename Rep>
requires RepresentationOf<std::remove_cvref_t<Rep>, get_quantity_spec(R{})>
constexpr
auto
operator/(
    R r,
    Rep&& rep) = delete;

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Divides a reference by another reference

template<
    typename Q2,
    typename U2>
[[nodiscard]]
consteval
/* implementation-defined */
operator/(
    reference r1,
    reference<Q2, U2> r2);

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Division operator

template<
    typename Value,
    auto R1,
    typename Rep1>
requires (!Quantity<Value>) && (!Reference<Value>) &&
            ScalableResultOf<get_quantity_spec(one / R1), std::divides<>, const Value&, Rep1>
[[nodiscard]]
constexpr
Quantity auto
operator/(
    Value const& val,
    quantity<R1, Rep1> const& q);

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Division operator

template<
    auto R1,
    typename Rep1,
    typename Value>
requires (!Quantity<Value>) && (!Reference<Value>) &&
            InvokeResultOf<get_quantity_spec(R1), std::divides<>, Rep1, const Value&>
[[nodiscard]]
constexpr
QuantityOf<get_quantity_spec(R1)> auto
operator/(
    quantity<R1, Rep1> const& q,
    Value const& val);

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Rebinds a quantity to a reference obtained by dividing its own reference by R

template<
    typename FwdQ,
    Reference R,
    Quantity Q = std::remove_cvref_t<FwdQ>>
[[nodiscard]]
constexpr
Quantity auto
operator/(
    FwdQ&& q,
    R r);

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Constructs a quantity from a representation value and the inverse of a reference

template<
    typename FwdRep,
    Reference R,
    RepresentationOf<get_quantity_spec(R{})> Rep = std::remove_cvref_t<FwdRep>>
requires (!detail::OffsetUnit<decltype(get_unit(R{}))>)
[[nodiscard]]
constexpr
Quantity auto
operator/(
    FwdRep&& lhs,
    R r);

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Deprecated constructor of a quantity from a representation value and the inverse of an offset‐unit reference

template<
    typename FwdRep,
    Reference R,
    RepresentationOf<get_quantity_spec(R{})> Rep = std::remove_cvref_t<FwdRep>>
requires detail::OffsetUnit<decltype(get_unit(R{}))>
[[deprecated("2.3.0: References using offset units (e.g., temperatures) should be constructed with the `delta` or `point` helpers")]]
constexpr
auto
operator/(
    FwdRep&& lhs,
    R r);

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Division operator

template<
    auto R1,
    typename Rep1,
    auto R2,
    typename Rep2>
requires InvocableQuantities<std::divides<>, quantity<R1, Rep1>, quantity<R2, Rep2>>
[[nodiscard]]
constexpr
Quantity auto
operator/(
    quantity<R1, Rep1> const& lhs,
    quantity<R2, Rep2> const& rhs);

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Return Value

  • a reference resulting from dividing the quantity specification and the unit

  • a reference resulting from dividing the quantity specifications and the units

  • quantity holding the same numerical value as q, with reference Q::reference / R{}

  • quantity of the inverse of reference r holding the value of lhs

Parameters

Name

Description

u1

the unit to divide

r

the reference to divide by

u2

the unit to divide by

q

quantity operand (unused)

rep

representation operand (unused)

r1

the reference to divide

r2

the reference to divide by

lhs

representation value to become the quantity's numerical value

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