Store operator function in a variable

[Agarunov (Anton Agarunov)]

I have a question about how properly store operator in a variable.

let function1: (Int, Int) -> Int = (+) // ok. Single element tuple?
let function2: (Int, Int) -> Int = +   // error: Expected expression after unary operator

// But
    
[1,2,3].reduce(0, (+)) // ok
[1,2,3].reduce(0, +)   // ok

Is this a bug or an expected behaviour?

[suyashsrijan]

@Agarunov

let function1: (Int, Int) -> Int = (+)

Seems like this is the same workaround as the one for putting operators in an array:

let operators: [(Int, Int) -> Int] = [(+), (-)] // Ok
let operators: [(Int, Int) -> Int] = [+, -] // Error

This bug is tracked by [SR-5509] Array of operators parsing issue · Issue #48081 · apple/swift · GitHub

[Agarunov (Anton Agarunov)]

huh, so this is known issue.
Thanks!