swift-mirror/test/Generics/inverse_protocols_errors.swift

// RUN: %target-typecheck-verify-swift -enable-experimental-feature NoncopyableGenerics

// REQUIRES: asserts

protocol RegularProto {}
protocol NCProto: ~Copyable, RegularProto {
  // expected-warning@-1 {{protocol 'NCProto' should be declared to refine 'Copyable' due to a same-type constraint on 'Self'}}
  func checkIfCopyableSelf(_ s: Self)
}

protocol Hello: ~Copyable {
  func greet(_ s: Self)
  // expected-error@-1 {{parameter of noncopyable type 'Self' must specify ownership}}
  // expected-note@-2 {{add 'borrowing' for an immutable reference}}
  // expected-note@-3 {{add 'inout' for a mutable reference}}
  // expected-note@-4 {{add 'consuming' to take the value from the caller}}

  func salute(_ s: borrowing Self)
}

struct RegularStruct: Hello {
    func greet(_ s: Self) {}
    func salute(_ s: Self) {}
}

struct NCThinger<T: ~Copyable>: ~Copyable, Hello {
  let fd: Int = 0
  deinit {}

  func greet(_ f: Self) {}
  // expected-error@-1 {{parameter of noncopyable type 'NCThinger<T>' must specify ownership}}
  // expected-note@-2 {{add 'borrowing' for an immutable reference}}
  // expected-note@-3 {{add 'inout' for a mutable reference}}
  // expected-note@-4 {{add 'consuming' to take the value from the caller}}

  func salute(_ s: borrowing Self) {}

  func setThinger(_ t: T) {}
  // expected-error@-1 {{parameter of noncopyable type 'T' must specify ownership}}
  // expected-note@-2 {{add 'borrowing' for an immutable reference}}
  // expected-note@-3 {{add 'inout' for a mutable reference}}
  // expected-note@-4 {{add 'consuming' to take the value from the caller}}
}

struct ExtraNoncopyStruct: ~Copyable, ~Copyable {}
// expected-error@-1 {{duplicate inverse constraint}}
// expected-note@-2 {{previous inverse constraint here}}

protocol ExtraNoncopyProto: ~Copyable, ~Copyable {}