mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
77e6c57a73
We fixed the behavior of Decimal.ulp with https://github.com/apple/swift-foundation/pull/741. We should remove this test with wrong expectations since we already test it in SwiftFoundation
126 lines
2.9 KiB
Swift
126 lines
2.9 KiB
Swift
// RUN: %target-run-simple-swift | %FileCheck %s
|
|
// REQUIRES: executable_test
|
|
|
|
// REQUIRES: objc_interop
|
|
|
|
import Foundation
|
|
|
|
enum NSDecimalResult: ExpressibleByStringLiteral, Equatable, CustomStringConvertible {
|
|
case Some(Decimal)
|
|
case Error(Decimal.CalculationError)
|
|
|
|
init() {
|
|
self = .Some(Decimal())
|
|
}
|
|
|
|
init(stringLiteral: String) {
|
|
if let value = Decimal(string: stringLiteral) {
|
|
self = .Some(value)
|
|
} else {
|
|
self = .Error(.lossOfPrecision)
|
|
}
|
|
}
|
|
|
|
init(unicodeScalarLiteral: String) {
|
|
self.init(stringLiteral: unicodeScalarLiteral)
|
|
}
|
|
init(extendedGraphemeClusterLiteral: String) {
|
|
self.init(stringLiteral: extendedGraphemeClusterLiteral)
|
|
}
|
|
|
|
var description: String {
|
|
switch self {
|
|
case .Some(var decimal):
|
|
return NSDecimalString(&decimal, nil)
|
|
case .Error:
|
|
return "NaN"
|
|
}
|
|
}
|
|
|
|
func pow10(_ power: Int) -> NSDecimalResult {
|
|
switch self {
|
|
case .Some(var decimal):
|
|
var result = Decimal()
|
|
let error = NSDecimalMultiplyByPowerOf10(&result, &decimal, Int16(power),
|
|
.plain)
|
|
if error != .noError {
|
|
return .Error(error)
|
|
} else {
|
|
return .Some(result)
|
|
}
|
|
case .Error:
|
|
return self
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
func ==(x: NSDecimalResult, y: NSDecimalResult) -> Bool {
|
|
switch (x, y) {
|
|
case var (.Some(x1), .Some(x2)):
|
|
return NSDecimalCompare(&x1, &x2) == .orderedSame
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func +(x: NSDecimalResult, y: NSDecimalResult) -> NSDecimalResult {
|
|
switch (x, y) {
|
|
case var (.Some(x1), .Some(y1)):
|
|
var result = Decimal()
|
|
let error = NSDecimalAdd(&result, &x1, &y1, .plain)
|
|
if error != .noError {
|
|
return .Error(error)
|
|
} else {
|
|
return .Some(result)
|
|
}
|
|
|
|
case let (.Error(error), _):
|
|
return .Error(error)
|
|
|
|
case let (_, .Error(error)):
|
|
return .Error(error)
|
|
|
|
// FIXME rdar://problem/19165412
|
|
default:
|
|
fatalError("impossible")
|
|
}
|
|
}
|
|
|
|
let zero = NSDecimalResult()
|
|
print(zero) // CHECK: 0
|
|
|
|
let two: NSDecimalResult = "1" + "1"
|
|
print(two) // CHECK: 2
|
|
|
|
let point95: NSDecimalResult = "0.8" + "0.1" + "0.05"
|
|
print(point95) // CHECK: 0.95
|
|
|
|
let twoAgain = point95 + "1.05"
|
|
print(twoAgain) // CHECK: 2
|
|
print(two == twoAgain) // CHECK: true
|
|
|
|
print(two + "not a number") // CHECK: NaN
|
|
print(two + "not a number" == "still not a number") // CHECK: false
|
|
print(two + "not a number" == two) // CHECK: false
|
|
|
|
let one: NSDecimalResult = "1"
|
|
print(one.pow10(2)) // CHECK: 100
|
|
print(one.pow10(-2)) // CHECK: 0.01
|
|
|
|
var twenty = Decimal(20)
|
|
var ten = Decimal(10)
|
|
twenty *= ten
|
|
print(twenty) // CHECK: 200
|
|
|
|
twenty = Decimal(20)
|
|
ten = Decimal(10)
|
|
twenty /= ten
|
|
print(twenty) // CHECK: 2
|
|
|
|
twenty = NSDecimalNumber(mantissa: 2, exponent: 1, isNegative: false) as Decimal
|
|
print(twenty.significand) // CHECK: 2
|
|
print(twenty.exponent) // CHECK: 1
|
|
|
|
print(Decimal(sign: .plus, exponent: -2, significand: 100)) // CHECK: 1
|