infix operator -= { associativity right precedence 90 assignment } Declarations func -=(inout: Double, rhs: Double) Declaration func -=(inout lhs: Double, rhs: Double) func -=(inout: Float, rhs: Float) Declaration func -=(inout lhs: Float, rhs: Float) func -=(inout: Float80, rhs: Float80) Declaration func -=(inout lhs: Float80, rhs: Float80) func -=(inout: Int, rhs: Int) Declaration func -=(inout lhs: Int, rhs: Int) func -=(inout: Int8, rhs: Int8) Declaration func -=(inout lhs: Int8, rhs: Int8) func -=(inout: Int16, rhs: Int16) Declaration func -=(inout lhs: Int16, rhs: Int16) func -=(inout: Int32, rhs: Int32) Declaration func -=(inout lhs: Int32, rhs: Int32) func -=(inout: Int64, rhs: Int64) Declaration func -=(inout lhs: Int64, rhs: Int64) func -=(inout: UInt, rhs: UInt) Declaration func -=(inout lhs: UInt, rhs: UInt) func -=(inout: UInt8, rhs: UInt8) Declaration func -=(inout lhs: UInt8, rhs: UInt8) func -=(inout: UInt16, rhs: UInt16) Declaration func -=(inout lhs: UInt16, rhs: UInt16) func -=(inout: UInt32, rhs: UInt32) Declaration func -=(inout lhs: UInt32, rhs: UInt32) func -=(inout: UInt64, rhs: UInt64) Declaration func -=(inout lhs: UInt64, rhs: UInt64) func -= <T : _IntegerArithmeticType>(inout: T, rhs: T) subtract lhs and rhs and store the result in lhs, trapping in case of arithmetic overflow (except in -Ounchecked builds). Declaration func -=<T : _IntegerArithmeticType>(inout lhs: T, rhs: T) func -= <T : _UnsignedIntegerType>(inout: T, rhs: T._DisallowMixedSignArithmetic) Declaration func -=<T : _UnsignedIntegerType>(inout lhs: T, rhs: T._DisallowMixedSignArithmetic) func -= <T : Strideable>(inout: T, rhs: T.Stride) Declaration func -=<T : Strideable>(inout lhs: T, rhs: T.Stride) func -= <T>(inout: UnsafeMutablePointer<T>, rhs: Int) Declaration func -=<T>(inout lhs: UnsafeMutablePointer<T>, rhs: Int) func -= <T>(inout: UnsafePointer<T>, rhs: Int) Declaration func -=<T>(inout lhs: UnsafePointer<T>, rhs: Int)