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docs: "Common units" chapter cleanup

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Mateusz Pusz
2024-10-15 20:52:51 +02:00
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docs/users_guide/framework_basics/systems_of_units.md
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@@ -262,9 +262,9 @@ This is why we provide both versions of identifiers for such units.
## Common units
Adding or subtracting two quantities of different units will force the library to find a common
unit for those. This is to prevent data truncation. For the cases when one of the units is an
integral multiple of the another, the resulting quantity will use a "smaller" one in its result.
Adding, subtracting, or comparing two quantities of different units will force the library to find
a common unit for those. This is to prevent data truncation. For the cases when one of the units is
an integral multiple of the another, the resulting quantity will use a "smaller" one in its result.
For example:
```cpp
@@ -273,14 +273,14 @@ static_assert((1 * km + 1 * mm).unit == mm);
static_assert((1 * yd + 1 * mi).unit == yd);
```
However, in many cases an arithmetic on quantities of different units will result in a yet another
unit. This happens when none of the source units is an integral multiple of another. In such cases,
the library returns a special type that denotes that we are dealing with a common unit of such
an equation:
However, in many cases an arithmetic operation on quantities of different units will result in
a yet another unit. This happens when none of the source units is an integral multiple of another.
In such cases, the library returns a special type that denotes that we are dealing with a common
unit of such an equation:
```cpp
quantity q1 = 1 * km + 1 * mi; // quantity<common_unit<international::mile, si::kilo_<si::metre>>{}, int>
quantity q2 = 1. * rad + 1. * deg; // quantity<common_unit<si::degree, si::radian>, double>{}>
quantity q2 = 1. * rad + 1. * deg; // quantity<common_unit<si::degree, si::radian>{}, double>
```
!!! note