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// RUN: %target-run-simple-swift | %FileCheck %s
// REQUIRES: executable_test
// REQUIRES: objc_interop
import Foundation
struct State {
let name: String
let population: Int
let abbrev: String
}
func stateFromPlistVerbose(_ plist: Dictionary<String, Any>) -> State? {
if let name = plist["name"] as? NSString {
if let population = plist["population"] as? NSNumber {
if let abbrev = plist["abbrev"] as? NSString {
if abbrev.length == 2 {
return State(name: name as String,
population: population.intValue,
abbrev: abbrev as String)
}
}
}
}
return nil
}
func stateFromPlistCool(_ plist: Dictionary<String, Any>) -> State? {
switch (plist["name"], plist["population"], plist["abbrev"]) {
case let (name as String, pop as Int, abbr as String)
where abbr.count == 2:
return State(name: name,
population: pop,
abbrev: abbr)
default:
return nil
}
}
let goodStatePlist: Dictionary<String, Any> = [
"name" as String: "California",
"population" as String: 38_040_000,
"abbrev" as String: "CA",
]
let invalidStatePlist1: Dictionary<String, Any> = [
"name": "California",
"population": "hella",
"abbrev": "CA",
]
let invalidStatePlist2: Dictionary<String, Any> = [
"name": "California",
"population": 38_040_000,
"abbrev": "Cali",
]
let invalidStatePlist3: Dictionary<String, Any> = [
"name": "California",
"population": 38_040_000,
]
// CHECK-LABEL: some:
// CHECK: name: "California"
// CHECK: population: 38040000
// CHECK: abbrev: "CA"
dump(stateFromPlistVerbose(goodStatePlist))
// CHECK-LABEL: some:
// CHECK: name: "California"
// CHECK: population: 38040000
// CHECK: abbrev: "CA"
dump(stateFromPlistCool(goodStatePlist))
// CHECK-LABEL: nil
dump(stateFromPlistVerbose(invalidStatePlist1))
// CHECK-LABEL: nil
dump(stateFromPlistCool(invalidStatePlist1))
// CHECK-LABEL: nil
dump(stateFromPlistVerbose(invalidStatePlist2))
// CHECK-LABEL: nil
dump(stateFromPlistCool(invalidStatePlist2))
// CHECK-LABEL: nil
dump(stateFromPlistVerbose(invalidStatePlist3))
// CHECK-LABEL: nil
dump(stateFromPlistCool(invalidStatePlist3))
struct Country {
let name: String
let population: Int
}
enum Statistic : CustomReflectable {
case ForState(State)
case ForCountry(Country)
var customMirror: Mirror {
switch self {
case .ForState(let state):
return Mirror(
self, children: ["State": state], displayStyle: .`enum`)
case .ForCountry(let country):
return Mirror(
self, children: ["Country": country], displayStyle: .`enum`)
}
}
}
func statisticFromPlist(_ plist: Dictionary<String, Any>) -> Statistic? {
switch (plist["kind"], plist["name"], plist["population"], plist["abbrev"]) {
case let ("state" as String, name as String, population as Int, abbrev as String)
where abbrev.count == 2:
return Statistic.ForState(State(name: name,
population: population,
abbrev: abbrev))
case let ("country" as String, name as String, population as Int, .none):
return Statistic.ForCountry(Country(name: name,
population: population))
default:
return nil
}
}
let goodStatePlist2: Dictionary<String, Any> = [
"kind": "state",
"name": "California",
"population": 38_040_000,
"abbrev": "CA"
]
let goodCountryPlist: Dictionary<String, Any> = [
"kind": "country",
"name": "India",
"population": 1_23_70_00_000,
]
let invalidCountryPlist1: Dictionary<String, Any> = [
"kind": "country",
"name": "India",
"population": 1_23_70_00_000,
"abbrev": "IN"
]
let invalidCountryPlist2: Dictionary<String, Any> = [
"kind": "country",
"name": "India",
"population": "123 crore",
]
let invalidKindPlist: Dictionary<String, Any> = [
"kind": "planet",
"name": "Mercury",
"population": 0
]
// CHECK-LABEL: ▿ Optional(main.Statistic.ForState(main.State(name: "California", population: 38040000, abbrev: "CA")))
dump(statisticFromPlist(goodStatePlist2))
// CHECK-LABEL: ▿ Optional(main.Statistic.ForCountry(main.Country(name: "India", population: 1237000000)))
dump(statisticFromPlist(goodCountryPlist))
// CHECK-LABEL: nil
dump(statisticFromPlist(invalidCountryPlist1))
// CHECK-LABEL: nil
dump(statisticFromPlist(invalidCountryPlist2))
// CHECK-LABEL: nil
dump(statisticFromPlist(invalidKindPlist))
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