How to treat NaN and Infinity?

[sharkdp]

> (1/0)m
Infinitym

> sqrt(-2)m
NaNm

🙁

Options to deal with this:

• Add DivideByZeroError to EvalError.

[paf31]

Isn't sqrt(-2)m ill-typed to begin with? There is no unit x such that x^2 = m, right?

Edit: sorry, I parsed it wrong. I see sqrt is being applied only to -2 which is unitless.

[sharkdp]

There is no unit x such that x^2 = m, right?

There is: it is simply x = m^0.5. It's a perfectly fine physical unit. sqrt is different from most other functions (like sin), in that it can be applied to a dimensionful quantity. insect already throws an error if one tries to apply sin to a non-scalar value:

> sin(2m)
Cannot convert quantity of unit 'm' to a scalar

Edit: sorry, I parsed it wrong

no worries 😄

[sharkdp]

Fixed by detecting numerical errors during evaluation.