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docs: code samples with quantity_spec definitions now have 3 versions

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Mateusz Pusz
2023-07-10 12:33:54 +02:00
parent f6b00d4aa6
commit c60f94caa3
3 changed files with 125 additions and 31 deletions
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docs/users_guide/framework_basics/systems_of_quantities.md
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@@ -121,25 +121,71 @@ from such an instantiation.
For example, here is how the above quantity kind tree can be modeled in the library:
```cpp
inline constexpr struct length : quantity_spec<dim_length> {} length;
inline constexpr struct width : quantity_spec<length> {} width;
inline constexpr auto breadth = width;
inline constexpr struct height : quantity_spec<length> {} height;
inline constexpr auto depth = height;
inline constexpr auto altitude = height;
inline constexpr struct thickness : quantity_spec<width> {} thickness;
inline constexpr struct diameter : quantity_spec<width> {} diameter;
inline constexpr struct radius : quantity_spec<width> {} radius;
inline constexpr struct radius_of_curvature : quantity_spec<radius> {} radius_of_curvature;
inline constexpr struct path_length : quantity_spec<length> {} path_length;
inline constexpr auto arc_length = path_length;
inline constexpr struct distance : quantity_spec<path_length> {} distance;
inline constexpr struct radial_distance : quantity_spec<distance> {} radial_distance;
inline constexpr struct wavelength : quantity_spec<length> {} wavelength;
inline constexpr struct position_vector : quantity_spec<length, quantity_character::vector> {} position_vector;
inline constexpr struct displacement : quantity_spec<length, quantity_character::vector> {} displacement;
```
=== "C++20"
```cpp
inline constexpr struct length : quantity_spec<length, dim_length> {} length;
inline constexpr struct width : quantity_spec<width, length> {} width;
inline constexpr auto breadth = width;
inline constexpr struct height : quantity_spec<height, length> {} height;
inline constexpr auto depth = height;
inline constexpr auto altitude = height;
inline constexpr struct thickness : quantity_spec<thickness, width> {} thickness;
inline constexpr struct diameter : quantity_spec<diameter, width> {} diameter;
inline constexpr struct radius : quantity_spec<radius, width> {} radius;
inline constexpr struct radius_of_curvature : quantity_spec<radius_of_curvature, radius> {} radius_of_curvature;
inline constexpr struct path_length : quantity_spec<path_length, length> {} path_length;
inline constexpr auto arc_length = path_length;
inline constexpr struct distance : quantity_spec<distance, path_length> {} distance;
inline constexpr struct radial_distance : quantity_spec<radial_distance, distance> {} radial_distance;
inline constexpr struct wavelength : quantity_spec<wavelength, length> {} wavelength;
inline constexpr struct position_vector : quantity_spec<position_vector, length, quantity_character::vector> {} position_vector;
inline constexpr struct displacement : quantity_spec<displacement, length, quantity_character::vector> {} displacement;
```
=== "C++23"
```cpp
inline constexpr struct length : quantity_spec<dim_length> {} length;
inline constexpr struct width : quantity_spec<length> {} width;
inline constexpr auto breadth = width;
inline constexpr struct height : quantity_spec<length> {} height;
inline constexpr auto depth = height;
inline constexpr auto altitude = height;
inline constexpr struct thickness : quantity_spec<width> {} thickness;
inline constexpr struct diameter : quantity_spec<width> {} diameter;
inline constexpr struct radius : quantity_spec<width> {} radius;
inline constexpr struct radius_of_curvature : quantity_spec<radius> {} radius_of_curvature;
inline constexpr struct path_length : quantity_spec<length> {} path_length;
inline constexpr auto arc_length = path_length;
inline constexpr struct distance : quantity_spec<path_length> {} distance;
inline constexpr struct radial_distance : quantity_spec<distance> {} radial_distance;
inline constexpr struct wavelength : quantity_spec<length> {} wavelength;
inline constexpr struct position_vector : quantity_spec<length, quantity_character::vector> {} position_vector;
inline constexpr struct displacement : quantity_spec<length, quantity_character::vector> {} displacement;
```
=== "Portable"
```cpp
QUANTITY_SPEC(length, dim_length);
QUANTITY_SPEC(width, length);
inline constexpr auto breadth = width;
QUANTITY_SPEC(height, length);
inline constexpr auto depth = height;
inline constexpr auto altitude = height;
QUANTITY_SPEC(thickness, width);
QUANTITY_SPEC(diameter, width);
QUANTITY_SPEC(radius, width);
QUANTITY_SPEC(radius_of_curvature, radius);
QUANTITY_SPEC(path_length, length);
inline constexpr auto arc_length = path_length;
QUANTITY_SPEC(distance, path_length);
QUANTITY_SPEC(radial_distance, distance);
QUANTITY_SPEC(wavelength, length);
QUANTITY_SPEC(position_vector, length, quantity_character::vector);
QUANTITY_SPEC(displacement, length, quantity_character::vector);
```
!!! note