operator &<<= { associativity right precedence assignment } Declarations func &<<= <T where T : FixedWidthInteger>(_: inout T, rhs: T) Declaration func &<<=<T where T : FixedWidthInteger>(lhs: inout T, rhs: T) func &<<= <T, U where T : FixedWidthInteger, U : BinaryInteger>(_: inout T, rhs: U) Declaration func &<<=<T, U where T : FixedWidthInteger, U : BinaryInteger>(lhs: inout T, rhs: U)