File: rdar122586992.swift

package info (click to toggle)
swiftlang 6.1.3-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,532 kB
  • sloc: cpp: 9,901,743; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (37 lines) | stat: -rw-r--r-- 829 bytes parent folder | download | duplicates (2) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 
// RUN: %target-typecheck-verify-swift

public protocol P1 {
  associatedtype A
  func f() -> A
}

public struct S1 {}

extension Int: P1 {
  public func f() -> S1 { fatalError() }
}

public protocol P2: RawRepresentable, P1 {}

public struct S2 {}

extension P2 where RawValue == S2, A == S2 {
  // This is not a candidate witness, because we require A == S1.
  public func f() -> A { fatalError() }
}

extension P2 where RawValue: P1, RawValue.A == A {
  // This is a candidate witness.
  public func f() -> A { fatalError() }
}

public protocol P3: P2 where A == S1, RawValue == Int {}

// When checking [S3: P1], the fact that P3 has [A == S1] should completely
// solve everything.
public struct S3: P3 {
  public init(rawValue: Int) { fatalError() }
  public var rawValue: Int { fatalError() }
}

let x: S1.Type = S3.A.self