File: issue-52031.swift

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (20 lines) | stat: -rw-r--r-- 720 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
// RUN: %target-typecheck-verify-swift -requirement-machine-max-rule-length=4

// https://github.com/apple/swift/issues/52031

struct S<N> {}

protocol P {
  associatedtype A: P = Self
  static func f(_ x: A) -> A
}

extension S: P where N: P {
  static func f<X: P>(_ x: X) -> S<X.A> where A == X, X.A == N {
  // expected-error@-1 {{cannot build rewrite system for generic signature; rule length limit exceeded}}
  // expected-note@-2 {{τ_0_0.[P:A].[P:A].[P:A].[P:A].[P:A].[concrete: S<S<S<S<S<S<τ_0_0>>>>>>] => τ_0_0.[P:A].[P:A].[P:A].[P:A].[P:A] [subst↓]}}
  // expected-error@-3 {{'A' is not a member type of type 'X'}}
  // expected-error@-4 {{'A' is not a member type of type 'X'}}
    return S<X.A>()
  }
}