Xquantity

Polymorphic dimensioned quantity with runtime unit checking/conversion

Context

_images/ditaa-f1cc7f6e5ec2ac0d2813d9d173a2217870a3bbf1.png

#include <xo/unit/xquantity.hpp>

allowmixing

object qty1<<xquantity>>
qty1 : scale = 1.23
qty1 : unit = unit

object unit<<scaled_unit>>
unit : is_natural() = true

qty1 o-- unit

Class

Class with run-time unit representation.

template<typename Repr = double, typename Int = std::int64_t, typename Int2x = detail::width2x_t<Int>> class xquantity

represent a scalar quantity with polymorphic units.

Repr type used represent a dimensionless multiple of a natural unit.

Constexpr implementation, but units are explicitly represented:

sizeof(Quantity2) > sizeof(Repr)

Explicit unit representation allows introducing units at runtime, for example in python bindings. See for example xo-pyutil

See quantity for implementation with units established at compile time

Require:

Repr supports numeric operations (+, -, *, /)
Repr supports conversion from double.

Member Variables

Warning

doxygengroup: Cannot find group “xquantity-instance-vars” in doxygen xml output for project “xodoxxml” from directory: /home/roland/proj/xo/xo-unit/.build-ccov/docs/dox/xml

Constructors

Warning

doxygengroup: Cannot find group “xquantity-ctors” in doxygen xml output for project “xodoxxml” from directory: /home/roland/proj/xo/xo-unit/.build-ccov/docs/dox/xml

Access Methods

Warning

doxygengroup: Cannot find group “xquantity-access-methods” in doxygen xml output for project “xodoxxml” from directory: /home/roland/proj/xo/xo-unit/.build-ccov/docs/dox/xml

General Methods

Warning

doxygengroup: Cannot find group “xquantity-methods” in doxygen xml output for project “xodoxxml” from directory: /home/roland/proj/xo/xo-unit/.build-ccov/docs/dox/xml