operator &+ { associativity left precedence } Declarations func &+ <T where T : _IntegerArithmetic>(_: T, rhs: T) Adds lhs and rhs, silently discarding any overflow. Declaration func &+<T where T : _IntegerArithmetic>(lhs: T, rhs: T) -> T func &+ <T where T : FixedWidthInteger>(_: T, rhs: T) Declaration func &+<T where T : FixedWidthInteger>(lhs: T, rhs: T) -> T