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55b8d9538d
- Don't attempt to insert fixes if there are restrictions present, they'd inform the failures. Inserting fixes too early doesn't help the solver because restriction matching logic would record the same fixes. - Adjust impact of the fixes. Optional conversions shouldn't impact the score in any way because they are not the source of the issue. - Look through one level of optional when failure is related to optional injection. The diagnostic is going to be about underlying type, so there is no reason to print optional on right-hand side.
1270 lines
42 KiB
Swift
1270 lines
42 KiB
Swift
// RUN: %target-typecheck-verify-swift
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func myMap<T1, T2>(_ array: [T1], _ fn: (T1) -> T2) -> [T2] {}
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var intArray : [Int]
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_ = myMap(intArray, { String($0) })
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_ = myMap(intArray, { x -> String in String(x) } )
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// Closures with too few parameters.
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func foo(_ x: (Int, Int) -> Int) {}
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foo({$0}) // expected-error{{contextual closure type '(Int, Int) -> Int' expects 2 arguments, but 1 was used in closure body}}
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foo({ [intArray] in $0}) // expected-error{{contextual closure type '(Int, Int) -> Int' expects 2 arguments, but 1 was used in closure body}}
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struct X {}
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func mySort(_ array: [String], _ predicate: (String, String) -> Bool) -> [String] {}
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func mySort(_ array: [X], _ predicate: (X, X) -> Bool) -> [X] {}
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var strings : [String]
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_ = mySort(strings, { x, y in x < y })
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// Closures with inout arguments.
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func f0<T, U>(_ t: T, _ f: (inout T) -> U) -> U {
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var t2 = t
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return f(&t2)
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}
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struct X2 {
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func g() -> Float { return 0 }
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}
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_ = f0(X2(), {$0.g()})
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// Closures with inout arguments and '__shared' conversions.
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func inoutToSharedConversions() {
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func fooOW<T, U>(_ f : (__owned T) -> U) {}
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fooOW({ (x : Int) in return Int(5) }) // defaut-to-'__owned' allowed
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fooOW({ (x : __owned Int) in return Int(5) }) // '__owned'-to-'__owned' allowed
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fooOW({ (x : __shared Int) in return Int(5) }) // '__shared'-to-'__owned' allowed
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fooOW({ (x : inout Int) in return Int(5) }) // expected-error {{cannot convert value of type '(inout Int) -> Int' to expected argument type '(__owned Int) -> Int'}}
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func fooIO<T, U>(_ f : (inout T) -> U) {}
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fooIO({ (x : inout Int) in return Int(5) }) // 'inout'-to-'inout' allowed
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fooIO({ (x : Int) in return Int(5) }) // expected-error {{cannot convert value of type '(Int) -> Int' to expected argument type '(inout Int) -> Int'}}
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fooIO({ (x : __shared Int) in return Int(5) }) // expected-error {{cannot convert value of type '(__shared Int) -> Int' to expected argument type '(inout Int) -> Int'}}
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fooIO({ (x : __owned Int) in return Int(5) }) // expected-error {{cannot convert value of type '(__owned Int) -> Int' to expected argument type '(inout Int) -> Int'}}
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func fooSH<T, U>(_ f : (__shared T) -> U) {}
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fooSH({ (x : __shared Int) in return Int(5) }) // '__shared'-to-'__shared' allowed
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fooSH({ (x : __owned Int) in return Int(5) }) // '__owned'-to-'__shared' allowed
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fooSH({ (x : inout Int) in return Int(5) }) // expected-error {{cannot convert value of type '(inout Int) -> Int' to expected argument type '(__shared Int) -> Int'}}
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fooSH({ (x : Int) in return Int(5) }) // default-to-'__shared' allowed
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}
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// Autoclosure
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func f1(f: @autoclosure () -> Int) { }
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func f2() -> Int { }
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f1(f: f2) // expected-error{{add () to forward @autoclosure parameter}}{{9-9=()}}
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f1(f: 5)
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// Ternary in closure
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var evenOrOdd : (Int) -> String = {$0 % 2 == 0 ? "even" : "odd"}
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// <rdar://problem/15367882>
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func foo() {
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not_declared({ $0 + 1 }) // expected-error{{cannot find 'not_declared' in scope}}
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}
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// <rdar://problem/15536725>
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struct X3<T> {
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init(_: (T) -> ()) {}
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}
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func testX3(_ x: Int) {
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var x = x
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_ = X3({ x = $0 })
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_ = x
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}
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// <rdar://problem/13811882>
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func test13811882() {
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var _ : (Int) -> (Int, Int) = {($0, $0)}
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var x = 1
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var _ : (Int) -> (Int, Int) = {($0, x)}
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x = 2
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}
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/// <rdar://problem/21544303>
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/// https://github.com/apple/swift/issues/46256
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/// QoI: "Unexpected trailing closure" should have a fixit to insert a `do`
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/// statement
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do {
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var inSubcall = true
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{ // expected-error {{closure expression is unused}} expected-note {{did you mean to use a 'do' statement?}}
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}
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inSubcall = false
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// These are a problems, but it's not clear what was intended.
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var somethingElse = true {
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// expected-error@-1 {{computed property must have an explicit type}}
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// expected-error@-2 {{variable with getter/setter cannot have an initial value}}
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}
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var somethingElseWithTypeAnno: Bool = true {} // expected-error {{variable with getter/setter cannot have an initial value}}
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inSubcall = false
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var v2 : Bool = false
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v2 = inSubcall // expected-error {{cannot call value of non-function type 'Bool'}}
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{
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}
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}
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// https://github.com/apple/swift/issues/46256
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do {
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let n = 42
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func consume(_ x: Int) {}
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{ consume($0) }(42)
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;
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({ $0(42) } { consume($0) }) // expected-error {{cannot call value of non-function type '()'}} expected-note {{callee is here}}
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{ print(42) } // expected-warning {{braces here form a trailing closure separated from its callee by multiple newlines}} expected-note {{did you mean to use a 'do' statement?}} {{3-3=do }}
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;
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({ $0(42) } { consume($0) }) // expected-error {{cannot call value of non-function type '()'}} expected-note {{callee is here}}
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{ print($0) } // expected-warning {{braces here form a trailing closure separated from its callee by multiple newlines}}
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;
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({ $0(42) } { consume($0) }) // expected-error {{cannot call value of non-function type '()'}} expected-note {{callee is here}}
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{ [n] in print(42) } // expected-warning {{braces here form a trailing closure separated from its callee by multiple newlines}}
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;
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({ $0(42) } { consume($0) }) // expected-error {{cannot call value of non-function type '()'}} expected-note {{callee is here}}
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{ consume($0) }(42) // expected-warning {{braces here form a trailing closure separated from its callee by multiple newlines}}
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;
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({ $0(42) } { consume($0) }) // expected-error {{cannot call value of non-function type '()'}} expected-note {{callee is here}}
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{ (x: Int) in consume(x) }(42) // expected-warning {{braces here form a trailing closure separated from its callee by multiple newlines}}
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;
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// This is technically a valid call, so nothing goes wrong until (42)
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{ $0(3) } // expected-error {{cannot call value of non-function type '()'}}
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{ consume($0) }(42)
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;
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({ $0(42) }) // expected-error {{cannot call value of non-function type '()'}}
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{ consume($0) }(42)
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;
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{ $0(3) } // expected-error {{cannot call value of non-function type '()'}}
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{ [n] in consume($0) }(42)
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;
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({ $0(42) }) // expected-error {{cannot call value of non-function type '()'}}
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{ [n] in consume($0) }(42)
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;
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// Equivalent but more obviously unintended.
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{ $0(3) } // expected-error {{cannot call value of non-function type '()'}} expected-note {{callee is here}}
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{ consume($0) }(42)
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// expected-warning@-1 {{braces here form a trailing closure separated from its callee by multiple newlines}}
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({ $0(3) }) // expected-error {{cannot call value of non-function type '()'}} expected-note {{callee is here}}
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{ consume($0) }(42)
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// expected-warning@-1 {{braces here form a trailing closure separated from its callee by multiple newlines}}
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;
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// Also a valid call (!!)
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{ $0 { $0 } } { $0 { 1 } } // expected-error {{function is unused}}
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consume(111)
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}
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// <rdar://problem/22162441> Crash from failing to diagnose nonexistent method access inside closure
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func r22162441(_ lines: [String]) {
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_ = lines.map { line in line.fooBar() } // expected-error {{value of type 'String' has no member 'fooBar'}}
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_ = lines.map { $0.fooBar() } // expected-error {{value of type 'String' has no member 'fooBar'}}
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}
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func testMap() {
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let a = 42
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[1,a].map { $0 + 1.0 } // expected-error {{cannot convert value of type 'Int' to expected element type 'Double'}}
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}
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// <rdar://problem/22414757> "UnresolvedDot" "in wrong phase" assertion from verifier
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[].reduce { $0 + $1 } // expected-error {{missing argument for parameter #1 in call}}
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// <rdar://problem/22333281> QoI: improve diagnostic when contextual type of closure disagrees with arguments
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var _: () -> Int = {0}
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// expected-error @+1 {{contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored}} {{24-24=_ in }}
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var _: (Int) -> Int = {0}
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// expected-error @+1 {{contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored}} {{24-24= _ in}}
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var _: (Int) -> Int = { 0 }
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// expected-error @+1 {{contextual type for closure argument list expects 2 arguments, which cannot be implicitly ignored}} {{29-29=_,_ in }}
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var _: (Int, Int) -> Int = {0}
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// expected-error @+1 {{contextual closure type '(Int, Int) -> Int' expects 2 arguments, but 3 were used in closure body}}
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var _: (Int,Int) -> Int = {$0+$1+$2}
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// expected-error @+1 {{contextual closure type '(Int, Int, Int) -> Int' expects 3 arguments, but 2 were used in closure body}}
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var _: (Int, Int, Int) -> Int = {$0+$1}
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// expected-error @+1 {{contextual closure type '(Int) -> Int' expects 1 argument, but 2 were used in closure body}}
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var _: (Int) -> Int = {a,b in 0}
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// expected-error @+1 {{contextual closure type '(Int) -> Int' expects 1 argument, but 3 were used in closure body}}
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var _: (Int) -> Int = {a,b,c in 0}
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// expected-error @+1 {{contextual closure type '(Int, Int, Int) -> Int' expects 3 arguments, but 2 were used in closure body}}
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var _: (Int, Int, Int) -> Int = {a, b in a+b}
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// <rdar://problem/15998821> Fail to infer types for closure that takes an inout argument
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func r15998821() {
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func take_closure(_ x : (inout Int) -> ()) { }
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func test1() {
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take_closure { (a : inout Int) in
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a = 42
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}
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}
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func test2() {
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take_closure { a in
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a = 42
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}
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}
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func withPtr(_ body: (inout Int) -> Int) {}
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func f() { withPtr { p in return p } }
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let g = { x in x = 3 }
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take_closure(g)
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}
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// <rdar://problem/22602657> better diagnostics for closures w/o "in" clause
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var _: (Int,Int) -> Int = {$0+$1+$2} // expected-error {{contextual closure type '(Int, Int) -> Int' expects 2 arguments, but 3 were used in closure body}}
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// Crash when re-typechecking bodies of non-single expression closures
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struct CC {}
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func callCC<U>(_ f: (CC) -> U) -> () {}
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func typeCheckMultiStmtClosureCrash() {
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callCC {
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_ = $0
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return 1
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}
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}
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// https://github.com/apple/swift/issues/43444
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func someFunc(_ foo: ((String) -> String)?,
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bar: @escaping (String) -> String) {
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let _: (String) -> String = foo != nil ? foo! : bar
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let _: (String) -> String = foo ?? bar
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}
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func verify_NotAC_to_AC_failure(_ arg: () -> ()) {
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func takesAC(_ arg: @autoclosure () -> ()) {}
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takesAC(arg) // expected-error {{add () to forward @autoclosure parameter}} {{14-14=()}}
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}
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// https://github.com/apple/swift/issues/43681
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// Error diagnostic refers to wrong argument
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do {
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class C1<T> {
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func append<Key: AnyObject>(value: T, forKey key: Key) where Key: Hashable {}
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}
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class C2<T> {
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let c1: C1<(AnyObject, T) -> ()> = C1()
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}
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struct S<T> {
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let cs: [C2<T>] = []
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func subscribe<Object: AnyObject>(object: Object?, method: (Object, T) -> ()) where Object: Hashable {
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let wrappedMethod = { (object: AnyObject, value: T) in }
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cs.forEach { $0.c1.append(value: wrappedMethod, forKey: object) }
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// expected-error@-1 {{value of optional type 'Object?' must be unwrapped to a value of type 'Object'}}
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// expected-note@-2 {{coalesce using '??' to provide a default when the optional value contains 'nil'}}
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// expected-note@-3 {{force-unwrap using '!' to abort execution if the optional value contains 'nil'}}
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}
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}
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}
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// Similar to https://github.com/apple/swift/issues/43681 but with multiple
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// generic arguments.
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do {
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class C {}
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struct S {
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func genericallyNonOptional<T: AnyObject>(_ a: T, _ b: T, _ c: T) { }
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// expected-note@-1 {{where 'T' = 'Optional<C>'}}
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func f(_ a: C?, _ b: C?, _ c: C) {
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genericallyNonOptional(a, b, c) // expected-error {{instance method 'genericallyNonOptional' requires that 'Optional<C>' be a class type}}
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// expected-note @-1 {{wrapped type 'C' satisfies this requirement}}
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}
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}
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}
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// Make sure we cannot infer an () argument from an empty parameter list.
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func acceptNothingToInt (_: () -> Int) {}
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func testAcceptNothingToInt(ac1: @autoclosure () -> Int) {
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acceptNothingToInt({ac1($0)}) // expected-error@:27 {{argument passed to call that takes no arguments}}
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// expected-error@-1{{contextual closure type '() -> Int' expects 0 arguments, but 1 was used in closure body}}
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}
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// <rdar://problem/23570873> QoI: Poor error calling map without being able to infer "U" (closure result inference)
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struct Thing {
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init?() {}
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}
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let things = Thing().map { thing in
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_ = thing
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return thing
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}
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// <rdar://problem/21675896> QoI: [Closure return type inference] Swift cannot find members for the result of inlined lambdas with branches
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func r21675896(file : String) {
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let x: String = {
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if true {
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return "foo"
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}
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else {
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return file
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}
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}().pathExtension // expected-error {{value of type 'String' has no member 'pathExtension'}}
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}
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// <rdar://problem/19870975> Incorrect diagnostic for failed member lookups within closures passed as arguments ("(_) -> _")
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func ident<T>(_ t: T) -> T {}
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var c = ident({1.DOESNT_EXIST}) // error: expected-error {{value of type 'Int' has no member 'DOESNT_EXIST'}}
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// <rdar://problem/20712541> QoI: Int/UInt mismatch produces useless error inside a block
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var afterMessageCount : Int?
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func uintFunc() -> UInt {}
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func takeVoidVoidFn(_ a : () -> ()) {}
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takeVoidVoidFn { () -> Void in
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afterMessageCount = uintFunc() // expected-error {{cannot assign value of type 'UInt' to type 'Int'}} {{23-23=Int(}} {{33-33=)}}
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}
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// <rdar://problem/19997471> Swift: Incorrect compile error when calling a function inside a closure
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func f19997471(_ x: String) {} // expected-note {{candidate expects value of type 'String' for parameter #1 (got 'T')}}
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func f19997471(_ x: Int) {} // expected-note {{candidate expects value of type 'Int' for parameter #1 (got 'T')}}
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func someGeneric19997471<T>(_ x: T) {
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takeVoidVoidFn {
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f19997471(x) // expected-error {{no exact matches in call to global function 'f19997471'}}
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}
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}
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// <rdar://problem/20921068> Swift fails to compile: [0].map() { _ in let r = (1,2).0; return r }
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let _ = [0].map {
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_ in
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let r = (1,2).0
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return r
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}
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// <rdar://problem/21078316> Less than useful error message when using map on optional dictionary type
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func rdar21078316() {
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var foo : [String : String]?
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var bar : [(String, String)]?
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bar = foo.map { ($0, $1) } // expected-error {{contextual closure type '([String : String]) -> [(String, String)]' expects 1 argument, but 2 were used in closure body}}
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// expected-error@-1{{cannot convert value of type '(Dictionary<String, String>, _)' to closure result type '[(String, String)]'}}
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}
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// <rdar://problem/20978044> QoI: Poor diagnostic when using an incorrect tuple element in a closure
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var numbers = [1, 2, 3]
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zip(numbers, numbers).filter { $0.2 > 1 } // expected-error {{value of tuple type 'Zip2Sequence<[Int], [Int]>.Element' (aka '(Int, Int)') has no member '2'}}
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// <rdar://problem/20868864> QoI: Cannot invoke 'function' with an argument list of type 'type'
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func foo20868864(_ callback: ([String]) -> ()) { }
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func rdar20868864(_ s: String) {
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var s = s
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foo20868864 { (strings: [String]) in
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s = strings // expected-error {{cannot assign value of type '[String]' to type 'String'}}
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}
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}
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// <rdar://problem/22058555> crash in cs diags in withCString
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func r22058555() {
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var firstChar: UInt8 = 0
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"abc".withCString { chars in
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firstChar = chars[0] // expected-error {{cannot assign value of type 'Int8' to type 'UInt8'}} {{17-17=UInt8(}} {{25-25=)}}
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}
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}
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// <rdar://problem/20789423> Unclear diagnostic for multi-statement closure with no return type
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func r20789423() {
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class C {
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func f(_ value: Int) { }
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}
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let p: C
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print(p.f(p)()) // expected-error {{cannot convert value of type 'C' to expected argument type 'Int'}}
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// expected-error@-1:11 {{cannot call value of non-function type '()'}}
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let _f = { (v: Int) in
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print("a")
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return "hi"
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}
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}
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/// In the example below, https://github.com/apple/swift/issues/45110 started
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/// preferring `C_45110.test(_:)` over `P_45110.test(it:)`. Prior to Swift 5.1,
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/// we emulated the old behavior. However, that behavior is inconsistent with
|
|
/// the typical approach of preferring overloads from the concrete type over one
|
|
/// from a protocol, so we removed the hack.
|
|
protocol Initable_45110 { init() }
|
|
|
|
protocol P_45110 {
|
|
associatedtype T: Initable_45110
|
|
}
|
|
extension P_45110 {
|
|
func test(it o: (T) -> Bool) -> Bool {
|
|
return o(T.self())
|
|
}
|
|
}
|
|
|
|
struct S_45110 : Initable_45110 {}
|
|
class C_45110 : P_45110 {
|
|
typealias T = S_45110
|
|
|
|
func test(_ o: Any) -> Bool {
|
|
return false
|
|
}
|
|
|
|
func call(_ c: C_45110) -> Bool {
|
|
// Note: the diagnostic about capturing 'self', indicates that we have
|
|
// selected test(_) rather than test(it:)
|
|
return c.test { o in test(o) } // expected-error{{call to method 'test' in closure requires explicit use of 'self' to make capture semantics explicit}} expected-note{{capture 'self' explicitly to enable implicit 'self' in this closure}} expected-note{{reference 'self.' explicitly}}
|
|
}
|
|
}
|
|
|
|
let _ = C_45110().call(C_45110())
|
|
|
|
// <rdar://problem/28909024> Returning incorrect result type from method invocation can result in nonsense diagnostic
|
|
extension Collection {
|
|
func r28909024(_ predicate: (Iterator.Element)->Bool) -> Index {
|
|
return startIndex
|
|
}
|
|
}
|
|
func fn_r28909024(n: Int) {
|
|
return (0..<10).r28909024 { // expected-error {{unexpected non-void return value in void function}} // expected-note {{did you mean to add a return type?}}
|
|
_ in true
|
|
}
|
|
}
|
|
|
|
// https://github.com/apple/swift/issues/45584
|
|
// Unexpected ambiguous expression in closure with generics
|
|
do {
|
|
struct S {
|
|
var dataOffset: Int
|
|
}
|
|
class C<R> {
|
|
init(arg: (R) -> Void) {}
|
|
}
|
|
func f(arg: String) {}
|
|
func g(arg: Int) -> Double {
|
|
return 2
|
|
}
|
|
|
|
C<S>(arg: { (r: S) in f(arg: g(arg: r.dataOffset)) }) // expected-error {{cannot convert value of type 'Double' to expected argument type 'String'}}
|
|
|
|
let _ = { $0[$1] }(1, 1) // expected-error {{value of type 'Int' has no subscripts}}
|
|
// FIXME: Better diagnostic here would be `assigning a variable to itself` but
|
|
// binding ordering change exposed a bug in diagnostics.
|
|
let _ = { $0 = ($0 = {}) } // expected-error {{function produces expected type '()'; did you mean to call it with '()'?}}
|
|
let _ = { $0 = $0 = 42 } // expected-error {{assigning a variable to itself}}
|
|
}
|
|
|
|
// https://github.com/apple/swift/issues/43020
|
|
// The () -> T => () -> () implicit conversion was kicking in anywhere
|
|
// inside a closure result, not just at the top-level.
|
|
let mismatchInClosureResultType : (String) -> ((Int) -> Void) = {
|
|
(String) -> ((Int) -> Void) in
|
|
return { }
|
|
// expected-error@-1 {{contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored}} {{13-13= _ in}}
|
|
}
|
|
|
|
// https://github.com/apple/swift/issues/46108
|
|
// Generic function taking closure with in-out parameter can result in a variety
|
|
// of compiler errors or EXC_BAD_ACCESS
|
|
do {
|
|
func f<T>(_ g: (inout T) -> Int) {}
|
|
f { $0 = 1 } // expected-error {{cannot convert value of type '()' to closure result type 'Int'}}
|
|
|
|
// This test makes sure that having closure with in-out parameter doesn't
|
|
// crash with member lookup.
|
|
struct S {
|
|
var number1: Int
|
|
}
|
|
func set_via_closure<T, U>(_ closure: (inout T, U) -> ()) {} // expected-note {{in call to function 'set_via_closure'}}
|
|
set_via_closure({ $0.number1 = $1 })
|
|
// expected-error@-1 {{generic parameter 'T' could not be inferred}}
|
|
// expected-error@-2 {{cannot infer type of closure parameter '$1' without a type annotation}}
|
|
|
|
func f2<T>(_ item: T, _ update: (inout T) -> Void) {
|
|
var x = item
|
|
update(&x)
|
|
}
|
|
var arg = 42
|
|
f2(arg) { $0 += 3 } // ok
|
|
}
|
|
|
|
/// https://github.com/apple/swift/issues/44585
|
|
/// https://github.com/apple/swift/issues/45663
|
|
/// Inference of `inout`
|
|
do {
|
|
func f<T>(_ closure: (inout T) -> Void) {}
|
|
f({ $0 += 2 }) // ok
|
|
}
|
|
|
|
/// https://github.com/apple/swift/issues/45663
|
|
/// `UnresolvedDotExpr` in single expression closure
|
|
do {
|
|
struct Lense<Whole, Part> {
|
|
let set: (inout Whole, Part) -> ()
|
|
}
|
|
struct S {
|
|
var number1: Int
|
|
func lenses() {
|
|
let _: Lense<S, Int> = Lense(
|
|
set: { $0.number1 = $1 } // ok
|
|
)
|
|
}
|
|
}
|
|
}
|
|
|
|
// https://github.com/apple/swift/issues/46067
|
|
// Segmentation fault and other error for closure with in-out parameter
|
|
do {
|
|
func unfold<A, B>(_ a0: A, next: (inout A) -> B) {}
|
|
unfold((0, 0)) { s in 0 } // ok
|
|
}
|
|
|
|
// https://github.com/apple/swift/issues/46343
|
|
// Swift 3.1 fails to compile 3.0 code involving closures and IUOs
|
|
let _: ((Any?) -> Void) = { (arg: Any!) in }
|
|
// This example was rejected in 3.0 as well, but accepting it is correct.
|
|
let _: ((Int?) -> Void) = { (arg: Int!) in }
|
|
|
|
// rdar://30429709 - We should not attempt an implicit conversion from
|
|
// () -> T to () -> Optional<()>.
|
|
func returnsArray() -> [Int] { return [] }
|
|
|
|
returnsArray().compactMap { $0 }.compactMap { }
|
|
// expected-warning@-1 {{expression of type 'Int' is unused}}
|
|
// expected-warning@-2 {{result of call to 'compactMap' is unused}}
|
|
|
|
// rdar://problem/30271695
|
|
_ = ["hi"].compactMap { $0.isEmpty ? nil : $0 }
|
|
|
|
// rdar://problem/32432145 - compiler should emit fixit to remove "_ in" in closures if 0 parameters is expected
|
|
|
|
func r32432145(_ a: () -> ()) {}
|
|
|
|
r32432145 { _ in let _ = 42 }
|
|
// expected-error@-1 {{contextual closure type '() -> ()' expects 0 arguments, but 1 was used in closure body}} {{13-17=}}
|
|
|
|
r32432145 { _ in
|
|
// expected-error@-1 {{contextual closure type '() -> ()' expects 0 arguments, but 1 was used in closure body}} {{13-17=}}
|
|
print("answer is 42")
|
|
}
|
|
|
|
r32432145 { _,_ in
|
|
// expected-error@-1 {{contextual closure type '() -> ()' expects 0 arguments, but 2 were used in closure body}} {{13-19=}}
|
|
print("answer is 42")
|
|
}
|
|
|
|
// rdar://problem/30106822 - Swift ignores type error in closure and presents a bogus error about the caller
|
|
[1, 2].first { $0.foo = 3 }
|
|
// expected-error@-1 {{value of type 'Int' has no member 'foo'}}
|
|
|
|
// rdar://problem/32433193
|
|
// https://github.com/apple/swift/issues/47606
|
|
// Higher-order function diagnostic mentions the wrong contextual type
|
|
// conversion problem
|
|
|
|
protocol P_47606 {
|
|
associatedtype Value
|
|
func map<U>(_ t : @escaping (Self.Value) -> U) -> S_47606<U>
|
|
}
|
|
|
|
struct S_47606<T> : P_47606 {
|
|
typealias Value = T
|
|
func map<U>(_ t : @escaping (T) -> U) -> S_47606<U> { fatalError() }
|
|
}
|
|
|
|
func exFalso_47606<T>() -> T {}
|
|
|
|
extension P_47606 {
|
|
func foo() -> S_47606<Int> {
|
|
let tt : S_47606<Int> = exFalso_47606()
|
|
return tt.map { x in (idx: x) }
|
|
// expected-error@-1 {{cannot convert value of type '(idx: Int)' to closure result type 'Int'}}
|
|
}
|
|
}
|
|
|
|
// rdar://problem/33296619
|
|
let u = rdar33296619().element //expected-error {{cannot find 'rdar33296619' in scope}}
|
|
|
|
[1].forEach { _ in
|
|
_ = "\(u)" // No diagnostic because `u` is already diagnosed and marked as invalid
|
|
}
|
|
|
|
[1].forEach { _ in
|
|
_ = 1 + "hi" // expected-error {{binary operator '+' cannot be applied to operands of type 'Int' and 'String'}}
|
|
// expected-note@-1 {{overloads for '+' exist with these partially matching parameter lists: (Int, Int), (String, String)}}
|
|
}
|
|
|
|
// https://github.com/apple/swift/issues/48236
|
|
do {
|
|
class C {
|
|
var property: String?
|
|
}
|
|
|
|
func test(cs: [C?]) -> [String?] {
|
|
return cs.map({ c in
|
|
let a = c.propertyWithTypo ?? "default"
|
|
// expected-error@-1 {{value of type 'C?' has no member 'propertyWithTypo'}}
|
|
let b = "\(a)"
|
|
return b
|
|
})
|
|
}
|
|
}
|
|
|
|
// Ensure that we still do the appropriate pointer conversion here.
|
|
_ = "".withCString { UnsafeMutableRawPointer(mutating: $0) }
|
|
|
|
// rdar://problem/34077439 - Crash when pre-checking bails out and
|
|
// leaves us with unfolded SequenceExprs inside closure body.
|
|
_ = { (offset) -> T in // expected-error {{cannot find type 'T' in scope}}
|
|
return offset ? 0 : 0
|
|
}
|
|
|
|
// https://github.com/apple/swift/issues/47778
|
|
do {
|
|
struct S<T> {
|
|
func map<R>(fn: (T) -> R) {}
|
|
}
|
|
|
|
S<()>().map{ return 0 }
|
|
S<()>().map{ _ in return 0 }
|
|
S<Void>().map{ return 0 }
|
|
S<Void>().map{ _ in return 0 }
|
|
}
|
|
|
|
// rdar://problem/33429010
|
|
|
|
struct I_33429010 : IteratorProtocol {
|
|
func next() -> Int? {
|
|
fatalError()
|
|
}
|
|
}
|
|
|
|
extension Sequence {
|
|
public func rdar33429010<Result>(into initialResult: Result,
|
|
_ nextPartialResult: (_ partialResult: inout Result, Iterator.Element) throws -> ()
|
|
) rethrows -> Result {
|
|
return initialResult
|
|
}
|
|
}
|
|
|
|
extension Int {
|
|
public mutating func rdar33429010_incr(_ inc: Int) {
|
|
self += inc
|
|
}
|
|
}
|
|
|
|
func rdar33429010_2() {
|
|
let iter = I_33429010()
|
|
var acc: Int = 0 // expected-warning {{}}
|
|
let _: Int = AnySequence { iter }.rdar33429010(into: acc, { $0 + $1 })
|
|
// expected-warning@-1 {{result of operator '+' is unused}}
|
|
let _: Int = AnySequence { iter }.rdar33429010(into: acc, { $0.rdar33429010_incr($1) })
|
|
}
|
|
|
|
class P_33429010 {
|
|
var name: String = "foo"
|
|
}
|
|
|
|
class C_33429010 : P_33429010 {
|
|
}
|
|
|
|
func rdar33429010_3() {
|
|
let arr = [C_33429010()]
|
|
let _ = arr.map({ ($0.name, $0 as P_33429010) }) // Ok
|
|
}
|
|
|
|
func rdar36054961() {
|
|
func bar(dict: [String: (inout String, Range<String.Index>, String) -> Void]) {}
|
|
bar(dict: ["abc": { str, range, _ in
|
|
str.replaceSubrange(range, with: str[range].reversed())
|
|
}])
|
|
}
|
|
|
|
protocol P_37790062 {
|
|
associatedtype T
|
|
var elt: T { get }
|
|
}
|
|
|
|
func rdar37790062() {
|
|
struct S<T> {
|
|
init(_ a: () -> T, _ b: () -> T) {}
|
|
}
|
|
|
|
class C1 : P_37790062 {
|
|
typealias T = Int
|
|
var elt: T { return 42 }
|
|
}
|
|
|
|
class C2 : P_37790062 {
|
|
typealias T = (String, Int, Void)
|
|
var elt: T { return ("question", 42, ()) }
|
|
}
|
|
|
|
func foo() -> Int { return 42 }
|
|
func bar() -> Void {}
|
|
func baz() -> (String, Int) { return ("question", 42) }
|
|
func bzz<T>(_ a: T) -> T { return a }
|
|
func faz<T: P_37790062>(_ a: T) -> T.T { return a.elt }
|
|
|
|
_ = S({ foo() }, { bar() }) // expected-warning {{result of call to 'foo()' is unused}}
|
|
_ = S({ baz() }, { bar() }) // expected-warning {{result of call to 'baz()' is unused}}
|
|
_ = S({ bzz(("question", 42)) }, { bar() }) // expected-warning {{result of call to 'bzz' is unused}}
|
|
_ = S({ bzz(String.self) }, { bar() }) // expected-warning {{result of call to 'bzz' is unused}}
|
|
_ = S({ bzz(((), (()))) }, { bar() }) // expected-warning {{result of call to 'bzz' is unused}}
|
|
_ = S({ bzz(C1()) }, { bar() }) // expected-warning {{result of call to 'bzz' is unused}}
|
|
_ = S({ faz(C2()) }, { bar() }) // expected-warning {{result of call to 'faz' is unused}}
|
|
}
|
|
|
|
// <rdar://problem/39489003>
|
|
typealias KeyedItem<K, T> = (key: K, value: T)
|
|
|
|
protocol Node {
|
|
associatedtype T
|
|
associatedtype E
|
|
associatedtype K
|
|
var item: E {get set}
|
|
var children: [(key: K, value: T)] {get set}
|
|
}
|
|
|
|
extension Node {
|
|
func getChild(for key:K)->(key: K, value: T) {
|
|
return children.first(where: { (item:KeyedItem) -> Bool in
|
|
return item.key == key
|
|
// expected-error@-1 {{binary operator '==' cannot be applied to two 'Self.K' operands}}
|
|
})!
|
|
}
|
|
}
|
|
|
|
// Make sure we don't allow this anymore
|
|
func takesTwo(_: (Int, Int) -> ()) {}
|
|
func takesTwoInOut(_: (Int, inout Int) -> ()) {}
|
|
|
|
takesTwo { _ in } // expected-error {{contextual closure type '(Int, Int) -> ()' expects 2 arguments, but 1 was used in closure body}}
|
|
takesTwoInOut { _ in } // expected-error {{contextual closure type '(Int, inout Int) -> ()' expects 2 arguments, but 1 was used in closure body}}
|
|
|
|
// <rdar://problem/20371273> Type errors inside anonymous functions don't provide enough information
|
|
func f20371273() {
|
|
let x: [Int] = [1, 2, 3, 4]
|
|
let y: UInt = 4
|
|
_ = x.filter { ($0 + y) > 42 } // expected-error {{cannot convert value of type 'UInt' to expected argument type 'Int'}}
|
|
}
|
|
|
|
// rdar://problem/42337247
|
|
|
|
func overloaded(_ handler: () -> Int) {} // expected-note {{found this candidate}}
|
|
func overloaded(_ handler: () -> Void) {} // expected-note {{found this candidate}}
|
|
|
|
overloaded { } // empty body => inferred as returning ()
|
|
|
|
overloaded { print("hi") } // single-expression closure => typechecked with body
|
|
|
|
overloaded { print("hi"); print("bye") } // multiple expression closure without explicit returns; can default to any return type
|
|
// expected-error@-1 {{ambiguous use of 'overloaded'}}
|
|
|
|
func not_overloaded(_ handler: () -> Int) {}
|
|
// expected-note@-1 {{'not_overloaded' declared here}}
|
|
|
|
not_overloaded { } // empty body
|
|
// expected-error@-1 {{cannot convert value of type '()' to closure result type 'Int'}}
|
|
|
|
not_overloaded { print("hi") } // single-expression closure
|
|
// expected-error@-1 {{cannot convert value of type '()' to closure result type 'Int'}}
|
|
|
|
// no error in -typecheck, but dataflow diagnostics will complain about missing return
|
|
not_overloaded { print("hi"); print("bye") } // multiple expression closure
|
|
|
|
func apply(_ fn: (Int) throws -> Int) rethrows -> Int {
|
|
return try fn(0)
|
|
}
|
|
|
|
enum E : Error {
|
|
case E
|
|
}
|
|
|
|
func test() -> Int? {
|
|
return try? apply({ _ in throw E.E })
|
|
}
|
|
|
|
var fn: () -> [Int] = {}
|
|
// expected-error@-1 {{cannot convert value of type '[Int]' to closure result type '()'}}
|
|
|
|
fn = {}
|
|
// expected-error@-1 {{cannot assign value of type '() -> ()' to type '() -> [Int]'}}
|
|
|
|
func test<Instances : Collection>(
|
|
_ instances: Instances,
|
|
_ fn: (Instances.Index, Instances.Index) -> Bool
|
|
) { fatalError() }
|
|
|
|
test([1]) { _, _ in fatalError(); () }
|
|
|
|
// rdar://problem/40537960 - Misleading diagnostic when using closure with wrong type
|
|
|
|
protocol P_40537960 {}
|
|
func rdar_40537960() {
|
|
struct S {
|
|
var v: String
|
|
}
|
|
|
|
struct L : P_40537960 {
|
|
init(_: String) {}
|
|
}
|
|
|
|
struct R<T : P_40537960> {
|
|
init(_: P_40537960) {}
|
|
}
|
|
|
|
struct A<T: Collection, P: P_40537960> { // expected-note {{'P' declared as parameter to type 'A'}}
|
|
typealias Data = T.Element
|
|
init(_: T, fn: (Data) -> R<P>) {}
|
|
}
|
|
|
|
var arr: [S] = []
|
|
_ = A(arr, fn: { L($0.v) })
|
|
// expected-error@-1 {{generic parameter 'P' could not be inferred}}
|
|
// expected-note@-2 {{explicitly specify the generic arguments to fix this issue}} {{8-8=<[S], <#P: P_40537960#>>}}
|
|
}
|
|
|
|
// rdar://problem/45659733
|
|
func rdar_45659733() {
|
|
func foo<T : BinaryInteger>(_: AnyHashable, _: T) {}
|
|
func bar(_ a: Int, _ b: Int) {
|
|
_ = (a ..< b).map { i in foo(i, i) } // Ok
|
|
}
|
|
|
|
struct S<V> {
|
|
func map<T>(
|
|
get: @escaping (V) -> T,
|
|
set: @escaping (inout V, T) -> Void
|
|
) -> S<T> {
|
|
fatalError()
|
|
}
|
|
|
|
subscript<T>(
|
|
keyPath: WritableKeyPath<V, T?>,
|
|
default defaultValue: T
|
|
) -> S<T> {
|
|
return map(
|
|
get: { $0[keyPath: keyPath] ?? defaultValue },
|
|
set: { $0[keyPath: keyPath] = $1 }
|
|
) // Ok, make sure that we deduce result to be S<T>
|
|
}
|
|
}
|
|
}
|
|
|
|
func rdar45771997() {
|
|
struct S {
|
|
mutating func foo() {}
|
|
}
|
|
|
|
let _: Int = { (s: inout S) in s.foo() }
|
|
// expected-error@-1 {{cannot convert value of type '(inout S) -> ()' to specified type 'Int'}}
|
|
}
|
|
|
|
struct rdar30347997 {
|
|
func withUnsafeMutableBufferPointer(body : (inout Int) -> ()) {}
|
|
func foo() {
|
|
withUnsafeMutableBufferPointer { // expected-error {{cannot convert value of type '(Int) -> ()' to expected argument type '(inout Int) -> ()'}}
|
|
(b : Int) in
|
|
}
|
|
}
|
|
}
|
|
|
|
struct rdar43866352<Options> {
|
|
func foo() {
|
|
let callback: (inout Options) -> Void
|
|
callback = { (options: Options) in } // expected-error {{cannot assign value of type '(Options) -> ()' to type '(inout Options) -> Void'}}
|
|
}
|
|
}
|
|
|
|
extension Hashable {
|
|
var self_: Self {
|
|
return self
|
|
}
|
|
}
|
|
|
|
do {
|
|
struct S<
|
|
C : Collection,
|
|
I : Hashable,
|
|
R : Numeric
|
|
> {
|
|
init(_ arr: C,
|
|
id: KeyPath<C.Element, I>,
|
|
content: @escaping (C.Element) -> R) {}
|
|
}
|
|
|
|
func foo(_ arr: [Int]) {
|
|
_ = S(arr, id: \.self_) {
|
|
// expected-error@-1 {{contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored}} {{30-30=_ in }}
|
|
return 42
|
|
}
|
|
}
|
|
}
|
|
|
|
// Don't allow result type of a closure to end up as a noescape type
|
|
|
|
// The funny error is because we infer the type of badResult as () -> ()
|
|
// via the 'T -> U => T -> ()' implicit conversion.
|
|
let badResult = { (fn: () -> ()) in fn }
|
|
// expected-error@-1 {{function is unused}}
|
|
|
|
// rdar://problem/55102498 - closure's result type can't be inferred if the last parameter has a default value
|
|
func test_trailing_closure_with_defaulted_last() {
|
|
func foo<T>(fn: () -> T, value: Int = 0) {}
|
|
foo { 42 } // Ok
|
|
foo(fn: { 42 }) // Ok
|
|
}
|
|
|
|
// Test that even in multi-statement closure case we still pick up `(Action) -> Void` over `Optional<(Action) -> Void>`.
|
|
// Such behavior used to rely on ranking of partial solutions but with delayed constraint generation of closure bodies
|
|
// it's no longer the case, so we need to make sure that even in case of complete solutions we still pick the right type.
|
|
|
|
protocol Action { }
|
|
protocol StateType { }
|
|
|
|
typealias Fn = (Action) -> Void
|
|
typealias Middleware<State> = (@escaping Fn, @escaping () -> State?) -> (@escaping Fn) -> Fn
|
|
|
|
class Foo<State: StateType> {
|
|
var state: State!
|
|
var fn: Fn!
|
|
|
|
init(middleware: [Middleware<State>]) {
|
|
self.fn = middleware
|
|
.reversed()
|
|
.reduce({ action in },
|
|
{ (fun, middleware) in // Ok, to type-check result type has to be `(Action) -> Void`
|
|
let dispatch: (Action) -> Void = { _ in }
|
|
let getState = { [weak self] in self?.state }
|
|
return middleware(dispatch, getState)(fun)
|
|
})
|
|
}
|
|
}
|
|
|
|
// Make sure that `String...` is translated into `[String]` in the body
|
|
func test_explicit_variadic_is_interpreted_correctly() {
|
|
_ = { (T: String...) -> String in T[0] + "" } // Ok
|
|
}
|
|
|
|
// rdar://problem/59208419 - closure result type is incorrectly inferred to be a supertype
|
|
func test_correct_inference_of_closure_result_in_presence_of_optionals() {
|
|
class A {}
|
|
class B : A {}
|
|
|
|
func foo(_: B) -> Int? { return 42 }
|
|
|
|
func bar<T: A>(_: (A) -> T?) -> T? {
|
|
return .none
|
|
}
|
|
|
|
guard let v = bar({ $0 as? B }),
|
|
let _ = foo(v) // Ok, v is inferred as `B`
|
|
else {
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
// rdar://problem/59741308 - inference fails with tuple element has to joined to supertype
|
|
func rdar_59741308() {
|
|
class Base {
|
|
func foo(_: Int) {}
|
|
}
|
|
|
|
class A : Base {}
|
|
class B : Base {}
|
|
|
|
func test() {
|
|
// Note that `0`, and `1` here are going to be type variables
|
|
// which makes join impossible until it's already to late for
|
|
// it to be useful.
|
|
[(A(), 0), (B(), 1)].forEach { base, value in
|
|
base.foo(value) // Ok
|
|
}
|
|
}
|
|
}
|
|
|
|
func r60074136() {
|
|
func takesClosure(_ closure: ((Int) -> Void) -> Void) {}
|
|
|
|
takesClosure { ((Int) -> Void) -> Void in // expected-warning {{unnamed parameters must be written with the empty name '_'; this is an error in the Swift 6 language mode}}
|
|
}
|
|
}
|
|
|
|
func rdar52204414() {
|
|
let _: () -> Void = { return 42 }
|
|
// expected-error@-1 {{cannot convert value of type 'Int' to closure result type 'Void'}}
|
|
let _ = { () -> Void in return 42 }
|
|
// expected-error@-1 {{declared closure result 'Void' is incompatible with return type 'Int'}} {{19-23=Int}}
|
|
}
|
|
|
|
// https://github.com/apple/swift/issues/54719
|
|
// Trailing closure is used as an argument to the last (positionally) parameter.
|
|
//
|
|
// Note that this was accepted prior to Swift 5.3. SE-0286 changed the
|
|
// order of argument resolution and made it ambiguous.
|
|
|
|
func overloaded_with_default(a: () -> Int, b: Int = 0, c: Int = 0) {} // expected-note{{found this candidate}}
|
|
func overloaded_with_default(b: Int = 0, c: Int = 0, a: () -> Int) {} // expected-note{{found this candidate}}
|
|
|
|
overloaded_with_default { 0 } // expected-error{{ambiguous use of 'overloaded_with_default'}}
|
|
|
|
func overloaded_with_default_and_autoclosure<T>(_ a: @autoclosure () -> T, b: Int = 0) {}
|
|
func overloaded_with_default_and_autoclosure<T>(b: Int = 0, c: @escaping () -> T?) {}
|
|
|
|
overloaded_with_default_and_autoclosure { 42 } // Ok
|
|
overloaded_with_default_and_autoclosure(42) // Ok
|
|
|
|
/// https://github.com/apple/swift/issues/55261
|
|
/// "error: type of expression is ambiguous without a type annotation" in many cases
|
|
/// where methods are missing.
|
|
do {
|
|
let _ = { a, b in }
|
|
// expected-error@-1 {{cannot infer type of closure parameter 'a' without a type annotation}}
|
|
// expected-error@-2 {{cannot infer type of closure parameter 'b' without a type annotation}}
|
|
|
|
_ = .a { b in } // expected-error {{cannot infer contextual base in reference to member 'a'}}
|
|
|
|
struct S {}
|
|
|
|
func test(s: S) {
|
|
S.doesntExist { b in } // expected-error {{type 'S' has no member 'doesntExist'}}
|
|
s.doesntExist { b in } // expected-error {{value of type 'S' has no member 'doesntExist'}}
|
|
s.doesntExist1 { v in } // expected-error {{value of type 'S' has no member 'doesntExist1'}}
|
|
.doesntExist2() { $0 }
|
|
}
|
|
}
|
|
|
|
// Make sure we can infer generic arguments in an explicit result type.
|
|
let explicitUnboundResult1 = { () -> Array in [0] }
|
|
let explicitUnboundResult2: (Array<Bool>) -> Array<Int> = {
|
|
(arr: Array) -> Array in [0]
|
|
}
|
|
// FIXME: Should we prioritize the contextual result type and infer Array<Int>
|
|
// rather than using a type variable in these cases?
|
|
// expected-error@+1 {{unable to infer closure type without a type annotation}}
|
|
let explicitUnboundResult3: (Array<Bool>) -> Array<Int> = {
|
|
(arr: Array) -> Array in [true]
|
|
}
|
|
|
|
// rdar://problem/71525503 - Assertion failed: (!shouldHaveDirectCalleeOverload(call) && "Should we have resolved a callee for this?")
|
|
func test_inout_with_invalid_member_ref() {
|
|
struct S {
|
|
static func createS(_ arg: inout Int) -> S { S() }
|
|
}
|
|
class C {
|
|
static subscript(s: (Int) -> Void) -> Bool { get { return false } }
|
|
}
|
|
|
|
let _: Bool = C[{ .createS(&$0) }]
|
|
// expected-error@-1 {{value of tuple type 'Void' has no member 'createS'}}
|
|
// expected-error@-2 {{cannot pass immutable value as inout argument: '$0' is immutable}}
|
|
}
|
|
|
|
// rdar://problem/74435602 - failure to infer a type for @autoclosure parameter.
|
|
func rdar_74435602(error: Error?) {
|
|
func accepts_autoclosure<T>(_ expression: @autoclosure () throws -> T) {}
|
|
|
|
accepts_autoclosure({
|
|
if let failure = error {
|
|
throw failure
|
|
}
|
|
})
|
|
}
|
|
|
|
// https://github.com/apple/swift/issues/56639
|
|
|
|
let _: (@convention(block) () -> Void)? = Bool.random() ? nil : {} // OK
|
|
let _: (@convention(thin) () -> Void)? = Bool.random() ? nil : {} // OK
|
|
let _: (@convention(c) () -> Void)? = Bool.random() ? nil : {} // OK on type checking, diagnostics are deferred to SIL
|
|
|
|
let _: (@convention(block) () -> Void)? = Bool.random() ? {} : {} // OK
|
|
let _: (@convention(thin) () -> Void)? = Bool.random() ? {} : {} // OK
|
|
let _: (@convention(c) () -> Void)? = Bool.random() ? {} : {} // OK on type checking, diagnostics are deferred to SIL
|
|
|
|
// Make sure that diagnostic is attached to the closure even when body is empty (implicitly returns `Void`)
|
|
var emptyBodyMismatch: () -> Int {
|
|
return { // expected-error {{cannot convert value of type '()' to closure result type 'Int'}}
|
|
return
|
|
}
|
|
}
|
|
|
|
// rdar://76250381 - crash when passing an argument to a closure that takes no arguments
|
|
struct R_76250381<Result, Failure: Error> {
|
|
func test(operation: @escaping () -> Result) -> Bool {
|
|
return try self.crash { group in // expected-error {{contextual closure type '() -> Result' expects 0 arguments, but 1 was used in closure body}}
|
|
operation(&group) // expected-error {{argument passed to call that takes no arguments}}
|
|
}
|
|
}
|
|
|
|
func crash(_: @escaping () -> Result) -> Bool {
|
|
return false
|
|
}
|
|
}
|
|
|
|
// https://github.com/apple/swift/issues/55926
|
|
(0..<10).map { x, y in }
|
|
// expected-error@-1 {{contextual closure type '(Range<Int>.Element) -> ()' (aka '(Int) -> ()') expects 1 argument, but 2 were used in closure body}}
|
|
(0..<10).map { x, y, z in }
|
|
// expected-error@-1 {{contextual closure type '(Range<Int>.Element) -> ()' (aka '(Int) -> ()') expects 1 argument, but 3 were used in closure body}}
|
|
(0..<10).map { x, y, z, w in }
|
|
// expected-error@-1 {{contextual closure type '(Range<Int>.Element) -> ()' (aka '(Int) -> ()') expects 1 argument, but 4 were used in closure body}}
|
|
|
|
// rdar://77022842 - crash due to a missing argument to a ternary operator
|
|
func rdar77022842(argA: Bool? = nil, argB: Bool? = nil) {
|
|
if let a = argA ?? false, if let b = argB ?? {
|
|
// expected-error@-1 {{initializer for conditional binding must have Optional type, not 'Bool'}}
|
|
// expected-error@-2 {{closure passed to parameter of type 'Bool?' that does not accept a closure}}
|
|
// expected-error@-3 {{cannot convert value of type 'Void' to expected condition type 'Bool'}}
|
|
// expected-error@-4 {{'if' may only be used as expression in return, throw, or as the source of an assignment}}
|
|
// expected-error@-5 {{'if' must have an unconditional 'else' to be used as expression}}
|
|
} // expected-error {{expected '{' after 'if' condition}}
|
|
}
|
|
|
|
// rdar://76058892 - spurious ambiguity diagnostic
|
|
func rdar76058892() {
|
|
struct S {
|
|
var test: Int = 0
|
|
}
|
|
|
|
func test(_: Int) {}
|
|
func test(_: () -> String) {}
|
|
|
|
func experiment(arr: [S]?) {
|
|
test { // expected-error {{contextual closure type '() -> String' expects 0 arguments, but 1 was used in closure body}}
|
|
if let arr = arr {
|
|
arr.map($0.test) // expected-note {{anonymous closure parameter '$0' is used here}} // expected-error {{generic parameter 'T' could not be inferred}}
|
|
// expected-error@-1 {{generic parameter 'E' could not be inferred}}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// rdar://78917861 - Invalid generic type parameter inference
|
|
|
|
func rdar78917861() {
|
|
class Cell {}
|
|
class MyCell : Cell {}
|
|
|
|
class DataCollection<D, C: Cell> {
|
|
}
|
|
|
|
class MyCollection {
|
|
typealias DataType = String
|
|
typealias CellType = MyCell
|
|
|
|
var data: DataCollection<DataType, CellType>
|
|
|
|
init() {
|
|
self.data = DataCollection<DataType, CellType>()
|
|
}
|
|
}
|
|
|
|
class Test {
|
|
let collection = MyCollection()
|
|
|
|
lazy var prop: DataCollection = {
|
|
collection.data // Ok
|
|
// Since contextual type `DataCollection` doesn't specify generic parameters they have to be inferred
|
|
// but that has to wait until the closure is resolved because types can flow both ways
|
|
}()
|
|
}
|
|
}
|
|
|
|
// rdar://81228501 - type-checker crash due to applied invalid solution
|
|
func test(arr: [[Int]]) {
|
|
struct A {
|
|
init(arg: [Int]) {}
|
|
}
|
|
|
|
arr.map { ($0 as? [Int]).map { A($0) } } // expected-error {{missing argument label 'arg:' in call}} {{36-36=arg: }}
|
|
}
|
|
|
|
func closureWithCaseArchetype<T>(_: T.Type) {
|
|
let _ = { (any: Any) throws -> Any? in
|
|
switch any {
|
|
case let type as T:
|
|
return type
|
|
|
|
default:
|
|
return any
|
|
}
|
|
}
|
|
}
|
|
|
|
// rdar://112426330 - invalid diagnostic when closure argument is omitted
|
|
do {
|
|
func test<T>(_: T, _: (T) -> Void) {}
|
|
|
|
test(42) { // expected-error {{contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored}} {{13-13= _ in}}
|
|
print("")
|
|
}
|
|
|
|
func context(_: (Int) -> Void) {}
|
|
func context(_: () -> Void) {}
|
|
|
|
context {
|
|
test(42) { // expected-error {{contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored}} {{15-15= _ in}}
|
|
print("")
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
|
|
do {
|
|
func test(_: Int, _: Int) {}
|
|
// expected-note@-1 {{closure passed to parameter of type 'Int' that does not accept a closure}}
|
|
func test(_: Int, _: String) {}
|
|
// expected-note@-1 {{closure passed to parameter of type 'String' that does not accept a closure}}
|
|
|
|
test(42) { // expected-error {{no exact matches in call to local function 'test'}}
|
|
print($0)
|
|
}
|
|
}
|
|
|
|
// Currently legal.
|
|
let _: () -> Int = { return fatalError() }
|