func numericCast<T : _SignedIntegerType, U : _SignedIntegerType>(_: T) Convert x to type U, trapping on overflow in -Onone and -O builds. Typically used to do conversion to any contextually-deduced integer type: func f(x: Int32) {} func g(x: Int64) { f(numericCast(x)) } Declaration func numericCast<T : _SignedIntegerType, U : _SignedIntegerType>(x: T) -> U func numericCast<T : _SignedIntegerType, U : UnsignedIntegerType>(_: T) Convert x to type U, trapping on overflow in -Onone and -O builds. Typically used to do conversion to any contextually-deduced integer type: func f(x: UInt32) {} func g(x: Int64) { f(numericCast(x)) } Declaration func numericCast<T : _SignedIntegerType, U : UnsignedIntegerType>(x: T) -> U func numericCast<T : UnsignedIntegerType, U : _SignedIntegerType>(_: T) Convert x to type U, trapping on overflow in -Onone and -O builds. Typically used to do conversion to any contextually-deduced integer type: func f(x: Int32) {} func g(x: UInt64) { f(numericCast(x)) } Declaration func numericCast<T : UnsignedIntegerType, U : _SignedIntegerType>(x: T) -> U func numericCast<T : UnsignedIntegerType, U : UnsignedIntegerType>(_: T) Convert x to type U, trapping on overflow in -Onone and -O builds. Typically used to do conversion to any contextually-deduced integer type: func f(x: UInt32) {} func g(x: UInt64) { f(numericCast(x)) } Declaration func numericCast<T : UnsignedIntegerType, U : UnsignedIntegerType>(x: T) -> U