File: rdar44770297.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 (15 lines) | stat: -rw-r--r-- 610 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
// RUN: %target-typecheck-verify-swift

protocol P {
  associatedtype A
}

func foo<T: P>(_: () throws -> T) -> T.A? { // expected-note {{where 'T' = 'Never'}}
  fatalError()
}

let _ = foo() {fatalError()} & nil
// expected-error@-1 {{global function 'foo' requires that 'Never' conform to 'P'}}
// expected-error@-2 {{value of optional type 'Never.A?' must be unwrapped to a value of type 'Never.A'}}
// expected-note@-3 {{coalesce using '??' to provide a default when the optional value contains 'nil'}}
// expected-note@-4 {{force-unwrap using '!' to abort execution if the optional value contains 'nil'}}