CODEWITHSUNDEEP
swiftswift-playgroundxcplayground
rikitikitavi
rikitikitavi

Reputation: 159

Infix % operator works in Playground, but not in included Swift library

I'm trying to overload the % operator for doubles in Swift. I realize the reason that the two methods on the Double type exist, but truncatingRemainder()'s behavior works fine for my use case.

I'm using Xcode Playgrounds to work through this problem and I thought I had it solved.

infix operator %

func % (left: Double, right: Double) -> Double {
    return left.truncatingRemainder(dividingBy: right)
}

var x = 0.0

for _ in 0...5 {
    print(x)
    x = (x + 1.5) % 5.0
}

print(x)

This works fine and gives me the correct expected behavior.

After this, I tried putting it into a library I am working on. I created a new .swift file, rebuilt the library, ensured the import statement was working (by using other functions/methods in my library) in my Playground, and I get the following errors:

An Xcode screenshot showing the errors listed above next to the code that's listed above.

Can anyone explain the difference between putting it in my Playground and including it in an imported file?

Upvotes: 1

Views: 77

Answers (1)

Raja Kishan
Raja Kishan

Reputation: 18914

For the library, you just need to declare your function with public access. no need infix operator %. You are doing operator overloading.

public func % (left: Double, right: Double) -> Double {
    return left.truncatingRemainder(dividingBy: right)
}

infix operator needed when you are working on Custom Operator. Like infix operator **

Upvotes: 1

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