Files
swift-mirror/test/Constraints/function_builder.swift

291 lines
6.1 KiB
Swift

// RUN: %target-run-simple-swift | %FileCheck %s
// REQUIRES: executable_test
enum Either<T,U> {
case first(T)
case second(U)
}
@_functionBuilder
struct TupleBuilder {
static func buildBlock<T1, T2>(_ t1: T1, _ t2: T2) -> (T1, T2) {
return (t1, t2)
}
static func buildBlock<T1, T2, T3>(_ t1: T1, _ t2: T2, _ t3: T3)
-> (T1, T2, T3) {
return (t1, t2, t3)
}
static func buildBlock<T1, T2, T3, T4>(_ t1: T1, _ t2: T2, _ t3: T3, _ t4: T4)
-> (T1, T2, T3, T4) {
return (t1, t2, t3, t4)
}
static func buildBlock<T1, T2, T3, T4, T5>(
_ t1: T1, _ t2: T2, _ t3: T3, _ t4: T4, _ t5: T5
) -> (T1, T2, T3, T4, T5) {
return (t1, t2, t3, t4, t5)
}
static func buildDo<T>(_ value: T) -> T { return value }
static func buildIf<T>(_ value: T?) -> T? { return value }
static func buildEither<T,U>(first value: T) -> Either<T,U> {
return .first(value)
}
static func buildEither<T,U>(second value: U) -> Either<T,U> {
return .second(value)
}
}
func tuplify<T>(_ cond: Bool, @TupleBuilder body: (Bool) -> T) {
print(body(cond))
}
// CHECK: (17, 3.14159, "Hello, DSL", (["nested", "do"], 6), Optional((2.71828, ["if", "stmt"])))
let name = "dsl"
tuplify(true) {
17
3.14159
"Hello, \(name.map { $0.uppercased() }.joined())"
do {
["nested", "do"]
1 + 2 + 3
}
if $0 {
2.71828
["if", "stmt"]
}
}
// CHECK: ("Empty optional", nil)
tuplify(false) {
"Empty optional"
if $0 {
2.71828
["if", "stmt"]
}
}
// CHECK: ("chain0", main.Either<(Swift.String, Swift.Double), (Swift.Double, Swift.String)>.second(2.8, "capable"))
tuplify(false) {
"chain0"
if $0 {
"marginal"
2.9
} else {
2.8
"capable"
}
}
// CHECK: ("chain1", nil)
tuplify(false) {
"chain1"
if $0 {
"marginal"
2.9
} else if $0 {
2.8
"capable"
}
}
// CHECK: ("chain2", Optional(main.Either<(Swift.String, Swift.Double), (Swift.Double, Swift.String)>.first("marginal", 2.9)))
tuplify(true) {
"chain2"
if $0 {
"marginal"
2.9
} else if $0 {
2.8
"capable"
}
}
// CHECK: ("chain3", main.Either<main.Either<(Swift.String, Swift.Double), (Swift.Double, Swift.String)>, main.Either<(Swift.Double, Swift.Double), (Swift.String, Swift.String)>>.first(main.Either<(Swift.String, Swift.Double), (Swift.Double, Swift.String)>.first("marginal", 2.9)))
tuplify(true) {
"chain3"
if $0 {
"marginal"
2.9
} else if $0 {
2.8
"capable"
} else if $0 {
2.8
1.0
} else {
"wild"
"broken"
}
}
// CHECK: ("chain4", main.Either<main.Either<main.Either<(Swift.String, Swift.Int), (Swift.String, Swift.Int)>, main.Either<(Swift.String, Swift.Int), (Swift.String, Swift.Int)>>, main.Either<main.Either<(Swift.String, Swift.Int), (Swift.String, Swift.Int)>, (Swift.String, Swift.Int)>>.first
tuplify(true) {
"chain4"
if $0 {
"0"
0
} else if $0 {
"1"
1
} else if $0 {
"2"
2
} else if $0 {
"3"
3
} else if $0 {
"4"
4
} else if $0 {
"5"
5
} else {
"6"
6
}
}
// CHECK: ("getterBuilder", 0, 4, 12)
@TupleBuilder
var globalBuilder: (String, Int, Int, Int) {
"getterBuilder"
0
4
12
}
print(globalBuilder)
// CHECK: ("funcBuilder", 13, 45.0)
@TupleBuilder
func funcBuilder(d: Double) -> (String, Int, Double) {
"funcBuilder"
13
d
}
print(funcBuilder(d: 45))
struct MemberBuilders {
@TupleBuilder
func methodBuilder(_ i: Int) -> (String, Int) {
"methodBuilder"
i
}
@TupleBuilder
static func staticMethodBuilder(_ i: Int) -> (String, Int) {
"staticMethodBuilder"
i + 14
}
@TupleBuilder
var propertyBuilder: (String, Int) {
"propertyBuilder"
12
}
}
// CHECK: ("staticMethodBuilder", 27)
print(MemberBuilders.staticMethodBuilder(13))
let mbuilders = MemberBuilders()
// CHECK: ("methodBuilder", 13)
print(mbuilders.methodBuilder(13))
// CHECK: ("propertyBuilder", 12)
print(mbuilders.propertyBuilder)
struct Tagged<Tag, Entity> {
let tag: Tag
let entity: Entity
}
protocol Taggable {
}
extension Taggable {
func tag<Tag>(_ tag: Tag) -> Tagged<Tag, Self> {
return Tagged(tag: tag, entity: self)
}
}
extension Int: Taggable { }
extension String: Taggable { }
extension Double: Taggable { }
@_functionBuilder
struct TaggedBuilder<Tag> {
static func buildBlock() -> () { }
static func buildBlock<T1>(_ t1: Tagged<Tag, T1>) -> Tagged<Tag, T1> {
return t1
}
static func buildBlock<T1, T2>(_ t1: Tagged<Tag, T1>, _ t2: Tagged<Tag, T2>) -> (Tagged<Tag, T1>, Tagged<Tag, T2>) {
return (t1, t2)
}
static func buildBlock<T1, T2, T3>(_ t1: Tagged<Tag, T1>, _ t2: Tagged<Tag, T2>, _ t3: Tagged<Tag, T3>)
-> (Tagged<Tag, T1>, Tagged<Tag, T2>, Tagged<Tag, T3>) {
return (t1, t2, t3)
}
static func buildBlock<T1, T2, T3, T4>(_ t1: Tagged<Tag, T1>, _ t2: Tagged<Tag, T2>, _ t3: Tagged<Tag, T3>, _ t4: Tagged<Tag, T4>)
-> (Tagged<Tag, T1>, Tagged<Tag, T2>, Tagged<Tag, T3>, Tagged<Tag, T4>) {
return (t1, t2, t3, t4)
}
static func buildBlock<T1, T2, T3, T4, T5>(
_ t1: Tagged<Tag, T1>, _ t2: Tagged<Tag, T2>, _ t3: Tagged<Tag, T3>, _ t4: Tagged<Tag, T4>, _ t5: Tagged<Tag, T5>
) -> (Tagged<Tag, T1>, Tagged<Tag, T2>, Tagged<Tag, T3>, Tagged<Tag, T4>, Tagged<Tag, T5>) {
return (t1, t2, t3, t4, t5)
}
static func buildIf<T>(_ value: Tagged<Tag, T>?) -> Tagged<Tag, T>? { return value }
}
enum Color {
case red, green, blue
}
func acceptColorTagged<Result>(@TaggedBuilder<Color> body: () -> Result) {
print(body())
}
struct TagAccepter<Tag> {
static func acceptTagged<Result>(@TaggedBuilder<Tag> body: () -> Result) {
print(body())
}
}
func testAcceptColorTagged(b: Bool, i: Int, s: String, d: Double) {
// CHECK: Tagged<
acceptColorTagged {
i.tag(.red)
s.tag(.green)
d.tag(.blue)
}
// CHECK: Tagged<
TagAccepter<Color>.acceptTagged {
i.tag(.red)
s.tag(.green)
d.tag(.blue)
}
// CHECK: Tagged<
TagAccepter<Color>.acceptTagged { () -> Tagged<Color, Int> in
if b {
return i.tag(Color.green)
} else {
return i.tag(Color.blue)
}
}
}
testAcceptColorTagged(b: true, i: 17, s: "Hello", d: 3.14159)