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Add more descriptive unit_of error message #1

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Add more descriptive unit_of error message #1

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2 changes: 1 addition & 1 deletion numbat/modules/core/quantities.nbt
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Original file line number Diff line number Diff line change
Expand Up @@ -7,5 +7,5 @@ fn value_of<T: Dim>(x: T) -> Scalar

@description("Extract the unit of a quantity (the `km/h` in `20 km/h`). This can be useful in generic code, but should generally be avoided otherwise. Returns an error if the quantity is zero.")
@example("unit_of(20 km/h)")
fn unit_of<T: Dim>(x: T) -> T = if x_value == 0 then error("…") else x / value_of(x)
fn unit_of<T: Dim>(x: T) -> T = if x_value == 0 then error("Invalid argument: cannot call `unit_of` on a value that evaluates to 0") else x / value_of(x)
where x_value = value_of(x)
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