How to use generic traits? [Question]

[BA8F0D39]

pub fn addnum(a: &arrayfire::Array<arrayfire::FloatingPoint>
	,b: &arrayfire::Array<arrayfire::FloatingPoint>) ->  arrayfire::Array<arrayfire::FloatingPoint> {
  a + b
}

I want to make a function that accepts the trait arrayfire::FloatingPoint and produces arrayfire::FloatingPoint. What modifications do I need to make it compile?

[9prady9]

@BA8F0D39 I am not sure I understand your use case, the trait you mentioned is more like a contract checking so that only acceptable Array objects(Array is generic struct) are passed to the relevant functions.

Is this what you are trying to achieve ?

pub fn addnum(a: &arrayfire::Array<T>,b: &arrayfire::Array<T>) ->  arrayfire::Array<T> 
where T: FloatingPoint {
  a + b
}

[BA8F0D39]

I am new to rust and the rust compiler says cannot find type T in this scope.
How would you define the trait T in this case to use arrayfire::FloatingPoint?

[9prady9]

In that case, you should look at https://doc.rust-lang.org/rust-by-example/generics.html

fn foo<T>(arg: T) { ... } that is how you define a generic function. In this case, the generic type T is what reused for defining the generic type Array<> that is in turn used a arguments to the function.