What does “% is unavailable: Use truncatingRemainder instead” mean?

Question

I get the following error when using code for an extension, I\'m not sure if they\'re asking to just use a different operator or modify the values in the expression based on

Answer 1

There's no need to create a separate modulo operator for floating point numbers, unless you think it makes the code safer. You can overload the % operator to accept floating point numbers like so:

func %(lhs: N, rhs: N) -> N {
    lhs.truncatingRemainder(dividingBy: rhs)
}

Usage

let a: Float80 = 10
let b: Float80 = 3
print(a % b)

You can now use % with any two floating point numbers of the same tye.