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// RUN: %target-typecheck-verify-swift
func takeAny(_ left: Any, _ right: Any) -> Int? {
return left as? Int
}
func throwing() throws -> Int? {}
func warnOptionalToAnyCoercion(value x: Int?) -> Any {
let a: Any = x // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
// expected-note@-1 {{provide a default value to avoid this warning}}{{17-17= ?? <#default value#>}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}{{17-17=!}}
// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}{{17-17= as Any}}
let b: Any = x as Any
let c: Any = takeAny(a, b) // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
// expected-note@-1 {{provide a default value to avoid this warning}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}
// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
let _: Any = takeAny(c, c) as Any
let _: Any = (x) // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
// expected-note@-1 {{provide a default value to avoid this warning}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}
// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
let f: Any = (x as Any)
let g: Any = (x) as (Any)
_ = takeAny(f as? Int, g) // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
// expected-note@-1 {{provide a default value to avoid this warning}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}
// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
let _: Any = takeAny(f as? Int, g) as Any // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
// expected-note@-1 {{provide a default value to avoid this warning}}{{33-33= ?? <#default value#>}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}{{33-33=!}}
// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}{{33-33= as Any}}
let _: Any = takeAny(f as? Int as Any, g) as Any
let _: Any = x! == x! ? 1 : x // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
// expected-note@-1 {{provide a default value to avoid this warning}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}
// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
do {
let _: Any = try throwing() // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
// expected-note@-1 {{provide a default value to avoid this warning}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}
// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
} catch {}
return x // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
// expected-note@-1 {{provide a default value to avoid this warning}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}
// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
}
func takesOptionalAny(_: Any?, _: Any?) {}
func warnNestedOptionalToOptionalAnyCoercion(_ a: Int?, _ b: Any??, _ c: Int???, _ d: Any????) {
takesOptionalAny(a, b) // expected-warning {{expression implicitly coerced from 'Any??' to 'Any?'}}
// expected-note@-1 {{provide a default value to avoid this warning}}{{24-24= ?? <#default value#>}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}{{24-24=!}}
// expected-note@-3 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{24-24= as Any?}}
takesOptionalAny(a, b ?? "")
takesOptionalAny(a, b!)
takesOptionalAny(a, b as Any?)
takesOptionalAny(c, d) // expected-warning {{expression implicitly coerced from 'Int???' to 'Any?'}}
// expected-note@-1 {{force-unwrap the value to avoid this warning}}{{21-21=!!}}
// expected-note@-2 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{21-21= as Any?}}
// expected-warning@-3 {{expression implicitly coerced from 'Any????' to 'Any?'}}
// expected-note@-4 {{force-unwrap the value to avoid this warning}}{{24-24=!!!}}
// expected-note@-5 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{24-24= as Any?}}
takesOptionalAny(c!!, d!!!)
takesOptionalAny(c as Any?, d as Any?)
}
class C {
var a: Int!
var b: Any?!
func returningIUO() -> Int! { return a }
func returningAny() -> Any { return a }
subscript(i: Int) -> Int! { return 0 }
subscript(i: Float) -> Any! { return 0 }
}
class D {
init!() {}
}
func returningIUO() -> Int! { return 1 }
// No warnings in Swift 3/4 for IUO-to-Any coercion.
func nowarnIUOToAnyCoercion(_ a: Int!, _ b: Any?!) {
_ = takeAny(a, b)
_ = takeAny(returningIUO(), C().returningIUO())
_ = takeAny(C().a, C().b)
_ = takeAny(C()[0], C()[1.0])
_ = takeAny(D(), D())
_ = takeAny(a as Any, b as Any)
}
// No warnings in Swift 3/4 for IUO-to-Any coercion.
func nowarnIUOToOptionalAnyCoercion(_ a: Int!, _ b: Any?!, _ c: Int??!, _ d: Any???!) {
takesOptionalAny(a, b)
takesOptionalAny(a, b ?? "")
takesOptionalAny(a, b!)
takesOptionalAny(a, b as Any?)
takesOptionalAny(c, d)
takesOptionalAny(c!!, d!!!)
takesOptionalAny(c as Any?, d as Any?)
}
func takesIUO(_: Any!, _: Any!) {}
func warnOptionalToIUOAny(_ a: Int?, _ b: Any??, _ c: Int???, _ d: Any????) {
takesIUO(a, b) // expected-warning {{expression implicitly coerced from 'Any??' to 'Any?'}}
// expected-note@-1 {{provide a default value to avoid this warning}}{{16-16= ?? <#default value#>}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}{{16-16=!}}
// expected-note@-3 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{16-16= as Any?}}
takesIUO(a, b ?? "")
takesIUO(a, b!)
takesIUO(a, b as Any?)
takesIUO(c, d) // expected-warning {{expression implicitly coerced from 'Int???' to 'Any?'}}
// expected-note@-1 {{force-unwrap the value to avoid this warning}}{{13-13=!!}}
// expected-note@-2 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{13-13= as Any?}}
// expected-warning@-3 {{expression implicitly coerced from 'Any????' to 'Any?'}}
// expected-note@-4 {{force-unwrap the value to avoid this warning}}{{16-16=!!!}}
// expected-note@-5 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{16-16= as Any?}}
takesIUO(c!!, d!!!)
takesIUO(c as Any?, d as Any?)
}
func takesCollectionOfAny(_ a: [Any], _ d: [String : Any]) {}
func takesCollectionOfOptionalAny(_ a: [Any?], _ d: [String : Any?]) {}
func warnCollectionOfOptionalToAnyCoercion(_ a: [Int?], _ d: [String : Int?]) {
takesCollectionOfAny(a, d) // expected-warning {{expression implicitly coerced from '[Int?]' to '[Any]'}}
// expected-note@-1 {{explicitly cast to '[Any]' with 'as [Any]' to silence this warning}}{{25-25= as [Any]}}
// expected-warning@-2 {{expression implicitly coerced from '[String : Int?]' to '[String : Any]'}}
// expected-note@-3 {{explicitly cast to '[String : Any]' with 'as [String : Any]' to silence this warning}}{{28-28= as [String : Any]}}
takesCollectionOfAny([a[0]], ["test" : a[0]]) // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
// expected-note@-1 {{provide a default value to avoid this warning}}{{29-29= ?? <#default value#>}}
// expected-note@-2 {{force-unwrap the value to avoid this warning}}{{29-29=!}}
// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}{{29-29= as Any}}
// expected-warning@-4 {{expression implicitly coerced from 'Int?' to 'Any'}}
// expected-note@-5 {{provide a default value to avoid this warning}}{{46-46= ?? <#default value#>}}
// expected-note@-6 {{force-unwrap the value to avoid this warning}}{{46-46=!}}
// expected-note@-7 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}{{46-46= as Any}}
takesCollectionOfAny(a as [Any], d as [String : Any])
}
func nowarnCollectionOfIUOToAnyCoercion(_ a: Int!) {
takesCollectionOfAny([a], ["test" : a])
}
func warnCollectionOfTripleOptionalToAnyCoercion(_ a: [Any???], _ d: [String: Any???]) {
takesCollectionOfAny(a, d) // expected-warning {{expression implicitly coerced from '[Any???]' to '[Any]'}}
// expected-note@-1 {{explicitly cast to '[Any]' with 'as [Any]' to silence this warning}}{{25-25= as [Any]}}
// expected-warning@-2 {{expression implicitly coerced from '[String : Any???]' to '[String : Any]'}}
// expected-note@-3 {{explicitly cast to '[String : Any]' with 'as [String : Any]' to silence this warning}}{{28-28= as [String : Any]}}
takesCollectionOfAny(a as [Any], d as [String : Any])
takesCollectionOfOptionalAny(a, d) // expected-warning {{expression implicitly coerced from '[Any???]' to '[Any?]'}}
// expected-note@-1 {{explicitly cast to '[Any?]' with 'as [Any?]' to silence this warning}}{{33-33= as [Any?]}}
// expected-warning@-2 {{expression implicitly coerced from '[String : Any???]' to '[String : Any?]'}}
// expected-note@-3 {{explicitly cast to '[String : Any?]' with 'as [String : Any?]' to silence this warning}}{{36-36= as [String : Any?]}}
takesCollectionOfOptionalAny(a as [Any?], d as [String : Any?])
}
struct SpecialType {}
extension DefaultStringInterpolation {
// An interpolator which explicitly contemplates that its value might be
// optional.
mutating func appendInterpolation(_ expr: SpecialType?) {
appendInterpolation(expr as Any)
}
}
func warnOptionalInStringInterpolationSegment(_ o : Int?) {
print("Always some, Always some, Always some: \(o)")
// expected-warning@-1 {{string interpolation produces a debug description for an optional value; did you mean to make this explicit?}}
// expected-note@-2 {{use 'String(describing:)' to silence this warning}} {{51-51=String(describing: }} {{52-52=)}}
// expected-note@-3 {{provide a default value to avoid this warning}} {{52-52= ?? <#default value#>}}
var i: Int? = o
print("Always some, Always some, Always some: \(i)")
// expected-warning@-1 {{string interpolation produces a debug description for an optional value; did you mean to make this explicit?}}
// expected-note@-2 {{use 'String(describing:)' to silence this warning}} {{51-51=String(describing: }} {{52-52=)}}
// expected-note@-3 {{provide a default value to avoid this warning}} {{52-52= ?? <#default value#>}}
i = nil
print("Always some, Always some, Always some: \(o.map { $0 + 1 })")
// expected-warning@-1 {{string interpolation produces a debug description for an optional value; did you mean to make this explicit?}}
// expected-note@-2 {{use 'String(describing:)' to silence this warning}} {{51-51=String(describing: }} {{67-67=)}}
// expected-note@-3 {{provide a default value to avoid this warning}} {{67-67= ?? <#default value#>}}
print("Always some, Always some, Always some: \(o as Int?)") // No warning
print("Always some, Always some, Always some: \(o.debugDescription)") // No warning.
let oST = Optional(SpecialType())
let ooST = Optional(oST)
print("Always some, Always some, Always some: \(oST)") // No warning.
print("Always some, Always some, Always some: \(ooST)")
// expected-warning@-1 {{string interpolation produces a debug description for an optional value; did you mean to make this explicit?}}
// expected-note@-2 {{use 'String(describing:)' to silence this warning}} {{51-51=String(describing: }} {{55-55=)}}
// expected-note@-3 {{provide a default value to avoid this warning}} {{55-55= ?? <#default value#>}}
}
|
