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docs: units composition FAQ cleanup

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Mateusz Pusz
2023-09-13 08:59:29 +02:00
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10
docs/getting_started/faq.md
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@@ -105,8 +105,11 @@ auto q = 60 * km / 2 * h;
```
Looks like `30 km/h`, right? But it is not. If the above code was allowed, it would result
in `30 km⋅h`. In case you want to divide `60 * km` by `2 * h` a parenthesis is needed
`60 * km / (2 * h)`.
in `30 km⋅h`. In case you want to divide `60 * km` by `2 * h` a parenthesis is needed:
```cpp
auto q = 60 * km / (2 * h);
```
Another surprising issue could result from the following code:
@@ -126,7 +129,8 @@ auto v = 42 * m;
auto q = make_length(v);
```
Fortunately, with the current design, such issues are detected at compile-time.
Fortunately, with the current design, such issues are detected at compile-time as
multiplying or dividing a quantity by a unit is not be supported.
## Why a dimensionless quantity is not just a fundamental arithmetic type?