how to use signed hexadecimal literals in swift?

Question

I'm using libraries with C interface in swift and in C error codes often are set with hexadecimal defines corresponded to signed integer values.

Is there any ways to set hexadecimal literal to signed integer type, for example:

var k: Int32 = 0x80000001

?

Answer 1

There's a special initializer for just this case:

let x = Int32(bitPattern: 0x80000001)
print(x) // -2147483647