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08f80ec361
Ensure that we grab the decl from the subscript expression so that we can check whether it returns an IUO. Also add tests for subscripts and failable inits.
208 lines
11 KiB
Swift
208 lines
11 KiB
Swift
// RUN: %target-typecheck-verify-swift
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func takeAny(_ left: Any, _ right: Any) -> Int? {
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return left as? Int
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}
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func throwing() throws -> Int? {}
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func warnOptionalToAnyCoercion(value x: Int?) -> Any {
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let a: Any = x // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}{{17-17= ?? <#default value#>}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}{{17-17=!}}
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// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}{{17-17= as Any}}
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let b: Any = x as Any
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let c: Any = takeAny(a, b) // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}
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// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
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let _: Any = takeAny(c, c) as Any
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let _: Any = (x) // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}
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// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
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let f: Any = (x as Any)
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let g: Any = (x) as (Any)
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_ = takeAny(f as? Int, g) // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}
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// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
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let _: Any = takeAny(f as? Int, g) as Any // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}{{33-33= ?? <#default value#>}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}{{33-33=!}}
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// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}{{33-33= as Any}}
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let _: Any = takeAny(f as? Int as Any, g) as Any
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let _: Any = x! == x! ? 1 : x // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}
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// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
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do {
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let _: Any = try throwing() // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}
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// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
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} catch {}
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return x // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}
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// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}
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}
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func takesOptionalAny(_: Any?, _: Any?) {}
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func warnNestedOptionalToOptionalAnyCoercion(_ a: Int?, _ b: Any??, _ c: Int???, _ d: Any????) {
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takesOptionalAny(a, b) // expected-warning {{expression implicitly coerced from 'Any??' to 'Any?'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}{{24-24= ?? <#default value#>}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}{{24-24=!}}
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// expected-note@-3 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{24-24= as Any?}}
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takesOptionalAny(a, b ?? "")
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takesOptionalAny(a, b!)
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takesOptionalAny(a, b as Any?)
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takesOptionalAny(c, d) // expected-warning {{expression implicitly coerced from 'Int???' to 'Any?'}}
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// expected-note@-1 {{force-unwrap the value to avoid this warning}}{{21-21=!!}}
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// expected-note@-2 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{21-21= as Any?}}
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// expected-warning@-3 {{expression implicitly coerced from 'Any????' to 'Any?'}}
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// expected-note@-4 {{force-unwrap the value to avoid this warning}}{{24-24=!!!}}
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// expected-note@-5 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{24-24= as Any?}}
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takesOptionalAny(c!!, d!!!)
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takesOptionalAny(c as Any?, d as Any?)
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}
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class C {
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var a: Int!
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var b: Any?!
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func returningIUO() -> Int! { return a }
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func returningAny() -> Any { return a }
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subscript(i: Int) -> Int! { return 0 }
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subscript(i: Float) -> Any! { return 0 }
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}
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class D {
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init!() {}
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}
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func returningIUO() -> Int! { return 1 }
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// No warnings in Swift 3/4 for IUO-to-Any coercion.
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func nowarnIUOToAnyCoercion(_ a: Int!, _ b: Any?!) {
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_ = takeAny(a, b)
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_ = takeAny(returningIUO(), C().returningIUO())
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_ = takeAny(C().a, C().b)
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_ = takeAny(C()[0], C()[1.0])
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_ = takeAny(D(), D())
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_ = takeAny(a as Any, b as Any)
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}
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// No warnings in Swift 3/4 for IUO-to-Any coercion.
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func nowarnIUOToOptionalAnyCoercion(_ a: Int!, _ b: Any?!, _ c: Int??!, _ d: Any???!) {
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takesOptionalAny(a, b)
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takesOptionalAny(a, b ?? "")
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takesOptionalAny(a, b!)
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takesOptionalAny(a, b as Any?)
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takesOptionalAny(c, d)
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takesOptionalAny(c!!, d!!!)
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takesOptionalAny(c as Any?, d as Any?)
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}
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func takesIUO(_: Any!, _: Any!) {}
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func warnOptionalToIUOAny(_ a: Int?, _ b: Any??, _ c: Int???, _ d: Any????) {
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takesIUO(a, b) // expected-warning {{expression implicitly coerced from 'Any??' to 'Any?'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}{{16-16= ?? <#default value#>}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}{{16-16=!}}
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// expected-note@-3 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{16-16= as Any?}}
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takesIUO(a, b ?? "")
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takesIUO(a, b!)
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takesIUO(a, b as Any?)
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takesIUO(c, d) // expected-warning {{expression implicitly coerced from 'Int???' to 'Any?'}}
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// expected-note@-1 {{force-unwrap the value to avoid this warning}}{{13-13=!!}}
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// expected-note@-2 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{13-13= as Any?}}
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// expected-warning@-3 {{expression implicitly coerced from 'Any????' to 'Any?'}}
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// expected-note@-4 {{force-unwrap the value to avoid this warning}}{{16-16=!!!}}
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// expected-note@-5 {{explicitly cast to 'Any?' with 'as Any?' to silence this warning}}{{16-16= as Any?}}
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takesIUO(c!!, d!!!)
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takesIUO(c as Any?, d as Any?)
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}
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func takesCollectionOfAny(_ a: [Any], _ d: [String : Any]) {}
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func takesCollectionOfOptionalAny(_ a: [Any?], _ d: [String : Any?]) {}
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func warnCollectionOfOptionalToAnyCoercion(_ a: [Int?], _ d: [String : Int?]) {
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takesCollectionOfAny(a, d) // expected-warning {{expression implicitly coerced from '[Int?]' to '[Any]'}}
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// expected-note@-1 {{explicitly cast to '[Any]' with 'as [Any]' to silence this warning}}{{25-25= as [Any]}}
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// expected-warning@-2 {{expression implicitly coerced from '[String : Int?]' to '[String : Any]'}}
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// expected-note@-3 {{explicitly cast to '[String : Any]' with 'as [String : Any]' to silence this warning}}{{28-28= as [String : Any]}}
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takesCollectionOfAny([a[0]], ["test" : a[0]]) // expected-warning {{expression implicitly coerced from 'Int?' to 'Any'}}
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// expected-note@-1 {{provide a default value to avoid this warning}}{{29-29= ?? <#default value#>}}
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// expected-note@-2 {{force-unwrap the value to avoid this warning}}{{29-29=!}}
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// expected-note@-3 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}{{29-29= as Any}}
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// expected-warning@-4 {{expression implicitly coerced from 'Int?' to 'Any'}}
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// expected-note@-5 {{provide a default value to avoid this warning}}{{46-46= ?? <#default value#>}}
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// expected-note@-6 {{force-unwrap the value to avoid this warning}}{{46-46=!}}
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// expected-note@-7 {{explicitly cast to 'Any' with 'as Any' to silence this warning}}{{46-46= as Any}}
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takesCollectionOfAny(a as [Any], d as [String : Any])
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}
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func nowarnCollectionOfIUOToAnyCoercion(_ a: Int!) {
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takesCollectionOfAny([a], ["test" : a])
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}
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func warnCollectionOfTripleOptionalToAnyCoercion(_ a: [Any???], _ d: [String: Any???]) {
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takesCollectionOfAny(a, d) // expected-warning {{expression implicitly coerced from '[Any???]' to '[Any]'}}
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// expected-note@-1 {{explicitly cast to '[Any]' with 'as [Any]' to silence this warning}}{{25-25= as [Any]}}
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// expected-warning@-2 {{expression implicitly coerced from '[String : Any???]' to '[String : Any]'}}
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// expected-note@-3 {{explicitly cast to '[String : Any]' with 'as [String : Any]' to silence this warning}}{{28-28= as [String : Any]}}
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takesCollectionOfAny(a as [Any], d as [String : Any])
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takesCollectionOfOptionalAny(a, d) // expected-warning {{expression implicitly coerced from '[Any???]' to '[Any?]'}}
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// expected-note@-1 {{explicitly cast to '[Any?]' with 'as [Any?]' to silence this warning}}{{33-33= as [Any?]}}
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// expected-warning@-2 {{expression implicitly coerced from '[String : Any???]' to '[String : Any?]'}}
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// expected-note@-3 {{explicitly cast to '[String : Any?]' with 'as [String : Any?]' to silence this warning}}{{36-36= as [String : Any?]}}
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takesCollectionOfOptionalAny(a as [Any?], d as [String : Any?])
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}
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func warnOptionalInStringInterpolationSegment(_ o : Int?) {
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print("Always some, Always some, Always some: \(o)")
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// expected-warning@-1 {{string interpolation produces a debug description for an optional value; did you mean to make this explicit?}}
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// expected-note@-2 {{use 'String(describing:)' to silence this warning}} {{51-51=String(describing: }} {{52-52=)}}
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// expected-note@-3 {{provide a default value to avoid this warning}} {{52-52= ?? <#default value#>}}
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var i: Int? = o
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print("Always some, Always some, Always some: \(i)")
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// expected-warning@-1 {{string interpolation produces a debug description for an optional value; did you mean to make this explicit?}}
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// expected-note@-2 {{use 'String(describing:)' to silence this warning}} {{51-51=String(describing: }} {{52-52=)}}
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// expected-note@-3 {{provide a default value to avoid this warning}} {{52-52= ?? <#default value#>}}
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i = nil
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print("Always some, Always some, Always some: \(o.map { $0 + 1 })")
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// expected-warning@-1 {{string interpolation produces a debug description for an optional value; did you mean to make this explicit?}}
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// expected-note@-2 {{use 'String(describing:)' to silence this warning}} {{51-51=String(describing: }} {{67-67=)}}
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// expected-note@-3 {{provide a default value to avoid this warning}} {{67-67= ?? <#default value#>}}
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print("Always some, Always some, Always some: \(o as Int?)") // No warning
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print("Always some, Always some, Always some: \(o.debugDescription)") // No warning.
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}
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