Roland Conybeare
d1fa15f248
git-subtree-dir: xo-unit git-subtree-mainline:e9ee6992cagit-subtree-split:b531e382c2
98 lines
1.9 KiB
ReStructuredText
98 lines
1.9 KiB
ReStructuredText
.. _bpu-class:
|
|
|
|
BPU
|
|
===
|
|
|
|
A rational (usually integral) power of a single basis unit
|
|
|
|
Context
|
|
-------
|
|
|
|
.. ditaa::
|
|
:--scale: 0.85
|
|
|
|
+----------------+---------------+
|
|
| quantity | xquantity |
|
|
+----------------+---------------+
|
|
| scaled_unit |
|
|
+--------------------------------+
|
|
| natural_unit |
|
|
+--------------------------------+
|
|
|cBLU bpu |
|
|
+----------------+ |
|
|
| bu_store | |
|
|
+----------------+---------------+
|
|
| basis_unit |
|
|
+--------------------------------+
|
|
| dimension |
|
|
+--------------------------------+
|
|
|
|
Introduction
|
|
------------
|
|
|
|
.. code-block:: cpp
|
|
|
|
#include <xo/unit/bpu.hpp>
|
|
|
|
A :code:`xo::qty::bpu` (aka "basis power unit") represents a rational (usually integer) power of a :doc:`basis-unit-class`.
|
|
|
|
For example:
|
|
|
|
.. uml::
|
|
:caption: representation for cubic millimeters
|
|
:scale: 99%
|
|
:align: center
|
|
|
|
object mm3<<bpu>>
|
|
mm3 : native_dim = dim::distance
|
|
mm3 : scalefactor = 1/1000
|
|
mm3 : power = 3/1
|
|
|
|
.. uml::
|
|
:caption: representation for annual (365-day) volatility
|
|
:scale: 99%
|
|
:align: center
|
|
|
|
object vol<<bpu>>
|
|
vol : native_dim = dim::time
|
|
vol : scalefactor = 365*24*3600
|
|
vol : power = -1/2
|
|
|
|
:code:`bpu` is intended as an implementation-level abstraction.
|
|
Application code will normally interact with the more-general :code:`scaled_unit`
|
|
instead of :code:`bpu`.
|
|
|
|
Class
|
|
-----
|
|
|
|
.. doxygenclass:: xo::qty::bpu
|
|
|
|
Member Variables
|
|
----------------
|
|
|
|
.. doxygengroup:: bpu-instance-vars
|
|
|
|
Constructors
|
|
------------
|
|
|
|
.. doxygengroup:: bpu-ctors
|
|
|
|
Access Methods
|
|
--------------
|
|
|
|
.. doxygengroup:: bpu-access-methods
|
|
|
|
Other Methods
|
|
-------------
|
|
|
|
.. doxygengroup:: bpu-methods
|
|
|
|
Comparison
|
|
----------
|
|
|
|
.. doxygengroup:: bpu-comparison
|
|
|
|
Details
|
|
-------
|
|
|
|
.. doxygengroup:: bpu-abbrev-helpers
|