Created
August 19, 2019 06:01
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enum Food: String { | |
case beef = "Beef" | |
case chicken = "Chicken" | |
case vegitarian = "Vegitarian" | |
case kids = "Kids" | |
} | |
protocol People { | |
var people: [Person] { get } | |
} | |
@_functionBuilder | |
struct PeopleBuilder { | |
static func buildBlock(_ people: People...) -> [Person] { | |
return people.reduce([], {$0+$1.people}) | |
} | |
} | |
struct Person: People { | |
let name: String | |
let food: Food | |
var people: [Person] { [self] } | |
init(_ name: String, _ food: Food) { | |
self.name = name | |
self.food = food | |
} | |
} | |
struct Family: People { | |
let name: String | |
private let members: [Person] | |
var people: [Person] { members } | |
// For blocks that return just 1 Person object | |
init(_ name: String, @PeopleBuilder _ builder: () -> Person) { | |
self.name = name | |
self.members = [builder()] | |
} | |
// For blocks that return just multiple Person objects | |
init(_ name: String, @PeopleBuilder _ builder: () -> [Person]) { | |
self.name = name | |
self.members = builder() | |
} | |
} | |
struct Table { | |
let people: [Person] | |
// For blocks that return just 1 Person object | |
init(@PeopleBuilder _ builder: () -> Person) { | |
self.people = [builder()] | |
} | |
// For blocks that return just multiple Person objects | |
init(@PeopleBuilder _ builder: () -> [Person]) { | |
self.people = builder() | |
} | |
} | |
let tables = [ | |
Table { | |
Family("Mr. & Mrs. Smith") { | |
Person("Mr. John Smith", .beef) | |
Person("Mrs. Jane Smith", .chicken) | |
} | |
Person("Mr. Ed Ford", .chicken) | |
Person("Ms. Amanda Doolittle", .vegitarian) | |
Family("Mr. & Mrs. Appleseed") { | |
Person("Mr. Jonny Appleseed", .chicken) | |
Person("Mrs. Jessica Appleseed", .vegitarian) | |
Person("Timmy Appleseed", .kids) | |
} | |
Family("Mr. & Mrs. Doe") { | |
Person("Mr. James Doe", .chicken) | |
Person("Mrs. Janice Doe", .beef) | |
Person("James Doe Jr.", .kids) | |
} | |
} | |
] | |
for (i, table) in tables.enumerated() { | |
print("Table #\(i+1)") | |
print(table.people | |
.map{"\($0.name),\($0.food.rawValue)"} | |
.joined(separator: "\n") | |
) | |
} |
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