swift3 - How to declare exponent/power operator with new precedencegroup in Swift 3? -

there's been change in swift 3 xcode 8 beta 6 , i'm not able declare operator power did before:

infix operator ^^ { } public func ^^ (radix: double, power: double) -> double {     return pow((radix), (power)) } 

i've read bit , there's new change been introduced in xcode 8 beta 6

from i'm guessing have declare precedence group , use operator this:

precedencegroup exponentiativeprecedence {}  infix operator ^^: exponentiativeprecedence public func ^^ (radix: double, power: double) -> double {     return pow((radix), (power)) } 

am going in right direction make work? should put inside {} of precedence group?

my final aim able make power operations simple operator in swift, e.g.:

10 ^^ -12 10 ^^ -24 

your code compiles , runs – don't need define precedence relationship or associativity if you're using operator in isolation, such in example gave:

10 ^^ -12 10 ^^ -24 

however, if want work other operators, chaining multiple exponents, you'll want define precedence relationship that's higher than multiplicationprecedence , a right associativity.

precedencegroup exponentiativeprecedence {     associativity: right     higherthan: multiplicationprecedence } 

therefore following expression:

let x = 2 + 10 * 5 ^^ 2 ^^ 3 

will evaluated as:

let x = 2 + (10 * (5 ^^ (2 ^^ 3))) //          ^^    ^^    ^^--- right associativity //          ||     \--------- exponentiativeprecedence > multiplicationprecedence //           \--------------- multiplicationprecedence > additionprecedence, //                            defined standard library 

the full list of standard library precedence groups available on the evolution proposal.