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// RUN: %target-typecheck-verify-swift -target %target-cpu-apple-macosx50
// REQUIRES: OS=macosx
@available(*, unavailable)
@resultBuilder
struct UnavailableBuilder {
// expected-note@-1 2 {{'UnavailableBuilder' has been explicitly marked unavailable here}}
static func buildBlock() {}
}
@UnavailableBuilder public func usesUnavailableBuilder() {}
// expected-error@-1 {{'UnavailableBuilder' is unavailable}}
public func takesUnavailableBuilder(@UnavailableBuilder _ fn: () -> ()) {}
// expected-error@-1 {{'UnavailableBuilder' is unavailable}}
enum Either<T,U> {
case first(T)
case second(U)
}
@resultBuilder
struct TupleBuilder {
// expected-note@-1{{add 'buildLimitedAvailability(_:)' to the result builder 'TupleBuilder' to erase type information for less-available types}}{{22-22=\n static func buildLimitedAvailability(_ component: <#Component#>) -> <#Component#> {\n <#code#>\n \}}}
// expected-note@-2{{add 'buildLimitedAvailability(_:)' to the result builder 'TupleBuilder' to erase type information for less-available types}}{{22-22=\n static func buildLimitedAvailability(_ component: <#Component#>) -> <#Component#> {\n <#code#>\n \}}}
static func buildBlock<T1>(_ t1: T1) -> (T1) {
return (t1)
}
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))
}
@available(OSX, introduced: 10.9)
func globalFuncAvailableOn10_9() -> Int { return 9 }
@available(OSX, introduced: 51)
func globalFuncAvailableOn51() -> Int { return 10 }
@available(OSX, introduced: 52)
struct Only52 { }
@available(OSX, introduced: 52)
func globalFuncAvailableOn52() -> Only52 { .init() }
tuplify(true) { cond in
globalFuncAvailableOn10_9()
if #available(OSX 51, *) {
globalFuncAvailableOn51()
tuplify(false) { cond2 in
if cond, #available(OSX 52, *) {
// expected-warning@-1{{result builder 'TupleBuilder' does not implement 'buildLimitedAvailability'; this code may crash on earlier versions of the OS}}
cond2
globalFuncAvailableOn52()
} else if true {
globalFuncAvailableOn52() // expected-error{{'globalFuncAvailableOn52()' is only available in macOS 52 or newer}}
// expected-note@-1{{add 'if #available' version check}}
} else if false {
globalFuncAvailableOn52() // expected-error{{'globalFuncAvailableOn52()' is only available in macOS 52 or newer}}
// expected-note@-1{{add 'if #available' version check}}
} else {
globalFuncAvailableOn52() // expected-error{{'globalFuncAvailableOn52()' is only available in macOS 52 or newer}}
// expected-note@-1{{add 'if #available' version check}}
}
if cond, #unavailable(OSX 52) {
// expected-warning@-1{{result builder 'TupleBuilder' does not implement 'buildLimitedAvailability'; this code may crash on earlier versions of the OS}}
cond2
globalFuncAvailableOn52() // expected-error{{'globalFuncAvailableOn52()' is only available in macOS 52 or newer}}
// expected-note@-1{{add 'if #available' version check}}
} else if true {
globalFuncAvailableOn52()
} else if false {
globalFuncAvailableOn52()
}
}
}
}
// Function builder that can perform type erasure for #available.
@resultBuilder
struct TupleBuilderAvailability {
static func buildBlock<T1>(_ t1: T1) -> (T1) {
return (t1)
}
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)
}
static func buildLimitedAvailability<T>(_ value: T) -> Any {
return value
}
}
func tuplifyWithAvailabilityErasure<T>(_ cond: Bool, @TupleBuilderAvailability body: (Bool) -> T) {
print(body(cond))
}
tuplifyWithAvailabilityErasure(true) { cond in
if cond, #available(OSX 52, *) {
globalFuncAvailableOn52()
}
if cond, #unavailable(OSX 52) {
cond
} else {
globalFuncAvailableOn52()
}
// https://github.com/apple/swift/issues/63764
if #unavailable(OSX 52) {
cond // Ok
}
}
// rdar://97533700 – Make sure we can prefer an unavailable buildPartialBlock if
// buildBlock also isn't available.
@resultBuilder
struct UnavailableBuildPartialBlock {
static func buildPartialBlock(first: Int) -> Int { 0 }
@available(*, unavailable)
static func buildPartialBlock(accumulated: Int, next: Int) -> Int { 0 }
static func buildBlock(_ x: Int...) -> Int { 0 }
}
@UnavailableBuildPartialBlock
func testUnavailableBuildPartialBlock() -> Int {
// We can use buildBlock here.
2
3
}
@resultBuilder
struct UnavailableBuildPartialBlockAndBuildBlock {
@available(*, unavailable)
static func buildPartialBlock(first: Int) -> Int { 0 }
// expected-note@-1 {{'buildPartialBlock(first:)' has been explicitly marked unavailable here}}
static func buildPartialBlock(accumulated: Int, next: Int) -> Int { 0 }
@available(*, unavailable)
static func buildBlock(_ x: Int...) -> Int { 0 }
}
// We can still use buildPartialBlock here as both are unavailable.
@UnavailableBuildPartialBlockAndBuildBlock
func testUnavailableBuildPartialBlockAndBuildBlock() -> Int {
// expected-error@-1 {{'buildPartialBlock(first:)' is unavailable}}
2
3
}
@available(*, unavailable)
@resultBuilder
struct UnavailableBuilderWithPartialBlock { // expected-note {{'UnavailableBuilderWithPartialBlock' has been explicitly marked unavailable here}}
@available(*, unavailable)
static func buildPartialBlock(first: String) -> Int { 0 }
static func buildPartialBlock(accumulated: Int, next: Int) -> Int { 0 }
static func buildBlock(_ x: Int...) -> Int { 0 }
}
@UnavailableBuilderWithPartialBlock // expected-error {{'UnavailableBuilderWithPartialBlock' is unavailable}}
func testUnavailableBuilderWithPartialBlock() -> Int {
// The builder itself is unavailable, so we can still opt for buildPartialBlock.
2 // expected-error {{cannot convert value of type 'Int' to expected argument type 'String'}}
3
}
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