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CircularShwift

RIPEMD CircularShift Precedence Group ~<< Infix Operator in Swift 4.

was:

infix operator  ~<< { precedence 160 associativity none }

public func ~<< (lhs: UInt32, rhs: Int) -> UInt32 {
    return (lhs << UInt32(rhs)) | (lhs >> UInt32(32 - rhs));
}

is now:

precedencegroup CircularShwift {
    associativity: none
    higherThan: BitwiseShiftPrecedence
}

infix operator  ~<< : CircularShwift

public func ~<< (lhs: UInt32, rhs: Int) -> UInt32 {
    return (lhs << UInt32(rhs)) | (lhs >> UInt32(32 - rhs));
}

source: Swift-Evolution - Proposals - 0077-operator-precedence