Add `calc.signum` (or equivalent) about typst HOT 6 CLOSED

Another option not mentioned above is working the same as (3), but returning +0.0 for +0.0 and -0.0 for -0.0.
Essentially, sign(x) = if x > 0.0 { type(x)(1) } else if x < -0.0 { type(x)(-1) } else { x }. I do believe this option has the most applicability in the widest range of use cases, as it aligns with the mathematical definition while keeping the flexibility of (2) — you get to differentiate between 0+ and 0- where that's required and elsewhere just use == 0 for a straightforward 0 check.

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Another option not mentioned above is working the same as (3), but returning +0.0 for +0.0 and -0.0 for -0.0. Essentially, sign(x) = if x > 0.0 { type(x)(1) } else if x < -0.0 { type(x)(-1) } else { x }. I do believe this option has the most applicability in the widest range of use cases, as it aligns with the mathematical definition while keeping the flexibility of (2) — you get to differentiate between 0+ and 0- where that's required and elsewhere just use == 0 for a straightforward 0 check.

I don't think that's particularly useful, since #(float("+0.0") == float("-0.0")) returns true, so it's easier to just return +0 for both cases.

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Since when do we prefer 'easier' approaches? /lh
My point is that for almost all use cases this is indistinguishable from (3), but if someone really needs to differentiate 0+ and 0- they still can.

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As said somewhere else, I'd prefer to have calc removed in favor of methods on int and float, so any potential discussion should take this possibility into account.

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As said somewhere else, I'd prefer to have calc removed in favor of methods on int and float, so any potential discussion should take this possibility into account.

I think that could definitely be suitable in this case, given that the behavior would differ between integers and floats. We could have int.signum() and float.signum().

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I'd say this favors a design where calc.signum returns a number of the type it was given.

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