CheckNSNumberTests.swift

//
//  CheckNSNumberTests.swift
//  CheckNSNumberTests
//

import XCTest

class CheckNSNumberTests: XCTestCase {
    
    func test_objCTypeFromCFNumber() {
        let objCType: (NSNumber) -> UnicodeScalar = { number in
            return UnicodeScalar(UInt8(number.objCType.pointee))
        }

        let types: [CFNumberType] = [.sInt8Type, .sInt16Type, .sInt32Type, .sInt64Type, .float32Type, .float64Type, .charType, .shortType, .intType, .longType, .longLongType, .floatType, .doubleType, .cfIndexType, .nsIntegerType, .cgFloatType, CFNumberType(rawValue: 17)!]

        for type in types {
            var value = 0
            let number = CFNumberCreate(nil, type, &value) as NSNumber
            print("\(type): \(objCType(number))")
        }
    }
}

extension CFNumberType: CustomStringConvertible {
    public var description: String {
        switch rawValue {
        case CFNumberType.sInt8Type.rawValue: return "sInt8Type"
        case CFNumberType.sInt16Type.rawValue: return "sInt16Type"
        case CFNumberType.sInt32Type.rawValue: return "sInt32Type"
        case CFNumberType.sInt64Type.rawValue: return "sInt64Type"
        case CFNumberType.float32Type.rawValue: return "float32Type"
        case CFNumberType.float64Type.rawValue: return "float64Type"
        case CFNumberType.charType.rawValue: return "charType"
        case CFNumberType.shortType.rawValue: return "shortType"
        case CFNumberType.intType.rawValue: return "intType"
        case CFNumberType.longType.rawValue: return "longType"
        case CFNumberType.longLongType.rawValue: return "longLongType"
        case CFNumberType.floatType.rawValue: return "floatType"
        case CFNumberType.doubleType.rawValue: return "doubleType"
        case CFNumberType.cfIndexType.rawValue: return "cfIndexType"
        case CFNumberType.nsIntegerType.rawValue: return "nsIntegerType"
        case CFNumberType.cgFloatType.rawValue: return "cgFloatType"
        case 17: return "sInt128Type"
        default: return "\(rawValue)"
        }
    }
}