5 Quantities and units library [quantities]

5.6 Quantity [qty]

5.6.7 Numerical value observers [qty.obs]

template<Unit U>
  requires(equivalent(U{}, unit))
constexpr rep& numerical_value_ref_in(U) & noexcept;
template<Unit U>
  requires(equivalent(U{}, unit))
constexpr const rep& numerical_value_ref_in(U) const & noexcept;

Returns: numerical-value.

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template<UnitCompatibleWith<unit, quantity_spec> U>
  requires QuantityConvertibleTo<quantity, quantity<make-reference(quantity_spec, U{}), Rep>>
constexpr rep numerical_value_in(U) const noexcept;

Effects: Equivalent to: return (*this).in(U{}).numerical-value;

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template<UnitCompatibleWith<unit, quantity_spec> U>
  requires requires(const quantity q) { value_cast<U{}>(q); }
constexpr rep force_numerical_value_in(U) const noexcept;

Effects: Equivalent to: return (*this).force_in(U{}).numerical-value;