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docs: "Many shades of the same unit" extended with a note about the derived units order

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Mateusz Pusz
2024-10-16 17:18:19 +02:00
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docs/users_guide/framework_basics/systems_of_units.md
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@ -92,6 +92,18 @@ prints:
All of the above quantities are equivalent and mean exactly the same.
!!! note
The above code example may give the impression that the order of components in a derived
unit is determined by the multiplication order. This is not the case. As stated in
[Simplifying the resulting expression templates](interface_introduction.md#simplifying-the-resulting-expression-templates),
to be able to reason about and simplify units, the library needs to order them in an
appropriate order. This will affect the order of components in a resulting type and
text output.
Please refer to [our FAQ](../../getting_started/faq.md#why-derived-units-order-is-not-preserved-from-the-multiplication)
for more information.
## Constraining a derived unit to work only with a specific derived quantity