swift-mirror/test/NameLookup/module_selector.swift

// RUN: %target-typecheck-verify-swift -verify-ignore-unrelated -sdk %clang-importer-sdk -module-name main -I %S/Inputs -enable-builtin-module
// RUN: %target-typecheck-verify-swift -verify-ignore-unrelated -sdk %clang-importer-sdk -module-name main -I %S/Inputs -enable-builtin-module -enable-experimental-feature ParserASTGen

// REQUIRES: swift_feature_ParserASTGen

// FIXME: This test doesn't really cover:
//
// * Whether X::foo finds foos in X's re-exports
// * Whether we handle access paths correctly
// * Interaction with ClangImporter
// * Key path dynamic member lookup
// * Custom type attributes (and coverage of type attrs generally is sparse)
//
// It also might not cover all combinations of name lookup paths and inputs.

import ModuleSelectorTestingKit

import ctypes.bits
import struct ModuleSelectorTestingKit::A

import Builtin

let magnitude: Never = fatalError()

// Test correct code using `A`

extension ModuleSelectorTestingKit::A {}

extension A: @retroactive Swift::Equatable {
  @_implements(Swift::Equatable, ==(_:_:))
  public static func equals(_: ModuleSelectorTestingKit::A, _: ModuleSelectorTestingKit::A) -> Swift::Bool {
    Swift::fatalError()
  }

  // FIXME: Add tests with autodiff @_differentiable(jvp:vjp:) and
  // @_derivative(of:)

  @_dynamicReplacement(for: ModuleSelectorTestingKit::negate())
  mutating func myNegate() {
    let fn: (Swift::Int, Swift::Int) -> Swift::Int = (Swift::+)

    let magnitude: Int.Swift::Magnitude = main::magnitude
    // expected-error@-1 {{cannot convert value of type 'Never' to specified type 'Int.Magnitude' (aka 'UInt')}}

    _ = (fn, magnitude)

    if Swift::Bool.Swift::random() {
      self.ModuleSelectorTestingKit::negate()
    }
    else {
      self = ModuleSelectorTestingKit::A(value: .Swift::min)
      self = A.ModuleSelectorTestingKit::init(value: .min)
    }

    self.main::myNegate()

    Swift::fatalError()

    _ = \ModuleSelectorTestingKit::A.magnitude
    _ = \A.ModuleSelectorTestingKit::magnitude

    _ = #ModuleSelectorTestingKit::ExprMacro
  }

  // FIXME: Can we test @convention(witness_method:)?
}

// Test resolution of main:: using `B`

extension main::B {}
// expected-error@-1 {{'B' is not imported through module 'main'}}
// expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{11-15=ModuleSelectorTestingKit}}

extension B: @retroactive main::Equatable {
  // expected-error@-1 {{'Equatable' is not imported through module 'main'}}
  // expected-note@-2 {{did you mean module 'Swift'?}} {{27-31=Swift}}

  @_implements(main::Equatable, ==(_:_:))
  // expected-error@-1 {{'Equatable' is not imported through module 'main'}}
  // expected-note@-2 {{did you mean module 'Swift'?}} {{16-20=Swift}}

  public static func equals(_: main::B, _: main::B) -> main::Bool {
    // expected-error@-1 2{{'B' is not imported through module 'main'}}
    // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{32-36=ModuleSelectorTestingKit}}
    // expected-note@-3 {{did you mean module 'ModuleSelectorTestingKit'?}} {{44-48=ModuleSelectorTestingKit}}
    // expected-error@-4 {{'Bool' is not imported through module 'main'}}
    // expected-note@-5 {{did you mean module 'Swift'?}} {{56-60=Swift}}
    main::fatalError()
    // expected-error@-1 {{'fatalError' is not imported through module 'main'}}
    // expected-note@-2 {{did you mean module 'Swift'?}} {{5-9=Swift}}
  }

  // FIXME: Add tests with autodiff @_differentiable(jvp:vjp:) and
  // @_derivative(of:)

  @_dynamicReplacement(for: main::negate())
  // expected-error@-1 {{'negate()' is not imported through module 'main'}}
  // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{29-33=ModuleSelectorTestingKit}}

  mutating func myNegate() {
    let fn: (main::Int, main::Int) -> main::Int =
    // expected-error@-1 3{{'Int' is not imported through module 'main'}}
    // expected-note@-2 {{did you mean module 'Swift'?}} {{14-18=Swift}}
    // expected-note@-3 {{did you mean module 'Swift'?}} {{25-29=Swift}}
    // expected-note@-4 {{did you mean module 'Swift'?}} {{39-43=Swift}}
      (main::+)
      // expected-error@-1 {{'+' is not imported through module 'main'}}
      // expected-note@-2 {{did you mean module 'Swift'?}} {{8-12=Swift}}

    let magnitude: Int.main::Magnitude = main::magnitude
    // expected-error@-1 {{'Magnitude' is not imported through module 'main'}}
    // expected-note@-2 {{did you mean module 'Swift'?}} {{24-28=Swift}}

    _ = (fn, magnitude)

    if main::Bool.main::random() {
      // expected-error@-1 {{'Bool' is not imported through module 'main'}}
      // expected-note@-2 {{did you mean module 'Swift'?}} {{8-12=Swift}}

      main::negate()
      // expected-error@-1 {{'negate' is not imported through module 'main'}}
      // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{7-11=self.ModuleSelectorTestingKit}}
    }
    else {
      self = main::B(value: .main::min)
      // expected-error@-1 {{'B' is not imported through module 'main'}}
      // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{14-18=ModuleSelectorTestingKit}}
      // expected-error@-3 {{cannot infer contextual base in reference to member 'main::min'}}

      self = B.main::init(value: .min)
      // expected-error@-1 {{'init(value:)' is not imported through module 'main'}}
      // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{16-20=ModuleSelectorTestingKit}}
    }

    self.main::myNegate()

    main::fatalError()
    // expected-error@-1 {{'fatalError' is not imported through module 'main'}}
    // expected-note@-2 {{did you mean module 'Swift'?}} {{5-9=Swift}}

    _ = \main::A.magnitude
    // expected-error@-1 {{'A' is not imported through module 'main'}}
    // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{10-14=ModuleSelectorTestingKit}}
    _ = \A.main::magnitude
    // expected-error@-1 {{'magnitude' is not imported through module 'main'}}
    // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{none}}

    _ = #main::ExprMacro
    // expected-error@-1 {{'ExprMacro' is not imported through module 'main'}}
    // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{10-14=ModuleSelectorTestingKit}}
  }

  @main::PeerMacro func thingy() {}
  // expected-error@-1 {{unknown attribute 'main::PeerMacro'}}

  // FIXME: Can we test @convention(witness_method:)?
}

// Test resolution of ModuleSelectorTestingKit:: using `C`

extension ModuleSelectorTestingKit::C {}

extension C: @retroactive ModuleSelectorTestingKit::Equatable {
  // expected-error@-1 {{'Equatable' is not imported through module 'ModuleSelectorTestingKit'}}
  // expected-note@-2 {{did you mean module 'Swift'?}} {{27-51=Swift}}

  @_implements(ModuleSelectorTestingKit::Equatable, ==(_:_:))
  // expected-error@-1 {{'Equatable' is not imported through module 'ModuleSelectorTestingKit'}}
  // expected-note@-2 {{did you mean module 'Swift'?}} {{16-40=Swift}}

  public static func equals(_: ModuleSelectorTestingKit::C, _: ModuleSelectorTestingKit::C) -> ModuleSelectorTestingKit::Bool {
    // expected-error@-1 {{'Bool' is not imported through module 'ModuleSelectorTestingKit'}}
    // expected-note@-2 {{did you mean module 'Swift'?}} {{96-120=Swift}}

    ModuleSelectorTestingKit::fatalError()
    // expected-error@-1 {{'fatalError' is not imported through module 'ModuleSelectorTestingKit'}}
    // expected-note@-2 {{did you mean module 'Swift'?}} {{5-29=Swift}}
  }

  // FIXME: Add tests with autodiff @_differentiable(jvp:vjp:) and
  // @_derivative(of:)

  @_dynamicReplacement(for: ModuleSelectorTestingKit::negate())

  mutating func myNegate() {
  // expected-note@-1 {{'myNegate()' declared here}}

    let fn: (ModuleSelectorTestingKit::Int, ModuleSelectorTestingKit::Int) -> ModuleSelectorTestingKit::Int =
    // expected-error@-1 3{{'Int' is not imported through module 'ModuleSelectorTestingKit'}}
    // expected-note@-2 {{did you mean module 'Swift'?}} {{14-38=Swift}}
    // expected-note@-3 {{did you mean module 'Swift'?}} {{45-69=Swift}}
    // expected-note@-4 {{did you mean module 'Swift'?}} {{79-103=Swift}}
      (ModuleSelectorTestingKit::+)
      // expected-error@-1 {{'+' is not imported through module 'ModuleSelectorTestingKit'}}
      // expected-note@-2 {{did you mean module 'Swift'?}} {{8-32=Swift}}

    let magnitude: Int.ModuleSelectorTestingKit::Magnitude = ModuleSelectorTestingKit::magnitude
    // expected-error@-1 {{'Magnitude' is not imported through module 'ModuleSelectorTestingKit'}}
    // expected-note@-2 {{did you mean module 'Swift'?}} {{24-48=Swift}}
    // expected-error@-3 {{'magnitude' is not imported through module 'ModuleSelectorTestingKit'}}
    // expected-note@-4 {{did you mean the local declaration?}} {{62-88=}}

    _ = (fn, magnitude)

    if ModuleSelectorTestingKit::Bool.ModuleSelectorTestingKit::random() {
    // expected-error@-1 {{'Bool' is not imported through module 'ModuleSelectorTestingKit'}}
    // expected-note@-2 {{did you mean module 'Swift'?}} {{8-32=Swift}}

      ModuleSelectorTestingKit::negate()
      // expected-error@-1 {{'negate' is not imported through module 'ModuleSelectorTestingKit'}}
      // expected-note@-2 {{did you mean the member of 'self'?}} {{7-7=self.}}
    }
    else {
      self = ModuleSelectorTestingKit::C(value: .ModuleSelectorTestingKit::min)
      // expected-error@-1 {{'min' is not imported through module 'ModuleSelectorTestingKit'}}
      // expected-note@-2 {{did you mean module 'Swift'?}} {{50-74=Swift}}

      self = C.ModuleSelectorTestingKit::init(value: .min)
    }

    self.ModuleSelectorTestingKit::myNegate()
    // expected-error@-1 {{'myNegate()' is not imported through module 'ModuleSelectorTestingKit'}}
    // expected-note@-2 {{did you mean module 'main'?}} {{10-34=main}}

    ModuleSelectorTestingKit::fatalError()
    // expected-error@-1 {{'fatalError' is not imported through module 'ModuleSelectorTestingKit'}}
    // expected-note@-2 {{did you mean module 'Swift'?}} {{5-29=Swift}}

    _ = \ModuleSelectorTestingKit::A.magnitude
    _ = \A.ModuleSelectorTestingKit::magnitude

    _ = #ModuleSelectorTestingKit::ExprMacro
  }

  @ModuleSelectorTestingKit::PeerMacro func thingy() {}
  // expected-error@-1 {{external macro implementation type 'Fnord.PeerMacro' could not be found for macro 'PeerMacro()'; plugin for module 'Fnord' not found}}

  // FIXME: Can we test @convention(witness_method:)?
}

// Test resolution of Swift:: using `D`

extension Swift::D {}
// expected-error@-1 {{'D' is not imported through module 'Swift'}}
// expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{11-16=ModuleSelectorTestingKit}}

extension D: @retroactive Swift::Equatable {
// Caused by Swift::D failing to typecheck in `equals(_:_:)`: expected-error@-1 *{{extension outside of file declaring struct 'D' prevents automatic synthesis of '==' for protocol 'Equatable'}} expected-note@-1 *{{add stubs for conformance}}

  @_implements(Swift::Equatable, ==(_:_:))
  public static func equals(_: Swift::D, _: Swift::D) -> Swift::Bool {
  // expected-error@-1 2{{'D' is not imported through module 'Swift'}}
  // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{32-37=ModuleSelectorTestingKit}}
  // expected-note@-3 {{did you mean module 'ModuleSelectorTestingKit'?}} {{45-50=ModuleSelectorTestingKit}}
    Swift::fatalError() // no-error -- not typechecking function bodies
  }

  // FIXME: Add tests with autodiff @_differentiable(jvp:vjp:) and
  // @_derivative(of:)

  @_dynamicReplacement(for: Swift::negate())
  // expected-error@-1 {{'negate()' is not imported through module 'Swift'}}
  // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{29-34=ModuleSelectorTestingKit}}

  mutating func myNegate() {
  // expected-note@-1 {{'myNegate()' declared here}}

    let fn: (Swift::Int, Swift::Int) -> Swift::Int =
      (Swift::+)

    let magnitude: Int.Swift::Magnitude = Swift::magnitude
    // expected-error@-1 {{'magnitude' is not imported through module 'Swift'}}
    // expected-note@-2 {{did you mean the local declaration?}} {{43-50=}}

    _ = (fn, magnitude)

    if Swift::Bool.Swift::random() {

      Swift::negate()
      // expected-error@-1 {{'negate' is not imported through module 'Swift'}}
      // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{7-12=self.ModuleSelectorTestingKit}}
    }
    else {
      self = Swift::D(value: .Swift::min)
      // expected-error@-1 {{'D' is not imported through module 'Swift'}}
      // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{14-19=ModuleSelectorTestingKit}}
      // expected-error@-3 {{cannot infer contextual base in reference to member 'Swift::min'}}

      self = D.Swift::init(value: .min)
      // expected-error@-1 {{'init(value:)' is not imported through module 'Swift'}}
      // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{16-21=ModuleSelectorTestingKit}}
    }

    self.Swift::myNegate()
    // expected-error@-1 {{'myNegate()' is not imported through module 'Swift'}}
    // expected-note@-2 {{did you mean module 'main'?}} {{10-15=main}}

    Swift::fatalError()

    _ = \Swift::A.magnitude
    // expected-error@-1 {{'A' is not imported through module 'Swift'}}
    // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{10-15=ModuleSelectorTestingKit}}
    _ = \A.Swift::magnitude
    // expected-error@-1 {{'magnitude' is not imported through module 'Swift'}}
    // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{none}}

    _ = #Swift::ExprMacro
    // expected-error@-1 {{'ExprMacro' is not imported through module 'Swift'}}
    // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{10-15=ModuleSelectorTestingKit}}
  }

  @Swift::PeerMacro func thingy() {}
  // expected-error@-1 {{unknown attribute 'Swift::PeerMacro'}}

  // FIXME: Can we test @convention(witness_method:)?
}

let mog: Never = fatalError()

func localVarsCantBeAccessedByModuleSelector() {
  let mag: Int.Swift::Magnitude = main::mag
  // expected-error@-1 {{'mag' is not imported through module 'main'}}
  // expected-note@-2 {{did you mean the local declaration?}} {{35-41=}}

  let mog: Never = main::mog
}

struct AvailableUser {
  @available(macOS 10.15, *) var use1: String { "foo" }

  @main::available() var use2
  // expected-error@-1 {{'available' is not imported through module 'main'}}
  // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{4-8=ModuleSelectorTestingKit}}
  // FIXME suppress: expected-error@-3 {{type annotation missing in pattern}}

  @ModuleSelectorTestingKit::available() var use4
  // no-error

  @Swift::available() var use5
  // expected-error@-1 {{'available' is not imported through module 'Swift'}}
  // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{4-9=ModuleSelectorTestingKit}}
  // FIXME suppress: expected-error@-3 {{type annotation missing in pattern}}
}

func builderUser2(@main::MyBuilder fn: () -> Void) {}
// expected-error@-1 {{'MyBuilder' is not imported through module 'main'}}
// expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{20-24=ModuleSelectorTestingKit}}

func builderUser3(@ModuleSelectorTestingKit::MyBuilder fn: () -> Void) {}
// no-error

func builderUser4(@Swift::MyBuilder fn: () -> Void) {}
// expected-error@-1 {{'MyBuilder' is not imported through module 'Swift'}}
// expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{20-25=ModuleSelectorTestingKit}}

// Error cases

func decl1(
  p1: main::A,
  // expected-error@-1 {{'A' is not imported through module 'main'}}
  // expected-note@-2 {{did you mean module 'ModuleSelectorTestingKit'?}} {{7-11=ModuleSelectorTestingKit}}
  label p2: inout A,
  label p3: @escaping () -> A
) {
  switch Optional(main::p2) {
  // expected-error@-1 {{'p2' is not imported through module 'main'}}
  // expected-note@-2 {{did you mean the local declaration?}} {{19-25=}}
  case Optional.some(let decl1i):
    break
  case .none:
    break
  }

  switch Optional(main::p2) {
  // expected-error@-1 {{'p2' is not imported through module 'main'}}
  // expected-note@-2 {{did you mean the local declaration?}} {{19-25=}}
  case let Optional.some(decl1j):
    break
  case .none:
    break
  }

  switch Optional(main::p2) {
  // expected-error@-1 {{'p2' is not imported through module 'main'}}
  // expected-note@-2 {{did you mean the local declaration?}} {{19-25=}}
 case let decl1k?:
    break
  case .none:
    break
  }
}

typealias decl5 = main::Bool
// expected-error@-1 {{'Bool' is not imported through module 'main'}}
// expected-note@-2 {{did you mean module 'Swift'?}} {{19-23=Swift}}

func badModuleNames() {
  NonexistentModule::print()
  // expected-error@-1 {{'print' is not imported through module 'NonexistentModule'}}
  // expected-note@-2 {{did you mean module 'Swift'?}} {{3-20=Swift}}

  _ = "foo".NonexistentModule::count
  // expected-error@-1 {{'count' is not imported through module 'NonexistentModule'}}
  // expected-note@-2 {{did you mean module 'Swift'?}} {{13-30=Swift}}

  let x: NonexistentModule::MyType = NonexistentModule::MyType()
  // expected-error@-1 {{cannot find type 'NonexistentModule::MyType' in scope}}
  // expected-error@-2 {{cannot find 'NonexistentModule::MyType' in scope}}

  let y: A.NonexistentModule::MyChildType = fatalError()
  // expected-error@-1 {{'NonexistentModule::MyChildType' is not a member type of struct 'ModuleSelectorTestingKit.A'}}
}

func builtinModuleLookups(_ int: Builtin::Int64) -> Builtin::Int64 {
  return Builtin::int_bswap_Int64(int)
}

func concurrencyModuleLookups(
  _: any Swift::Clock,
  _: any _Concurrency::Clock,
  _: any ModuleSelectorTestingKit::Clock
  // expected-error@-1 {{'Clock' is not imported through module 'ModuleSelectorTestingKit'}}
  // expected-note@-2 {{did you mean module 'Swift'?}} {{10-34=Swift}}
) async {
  await Swift::withTaskCancellationHandler {} onCancel: {}
  await _Concurrency::withTaskCancellationHandler {} onCancel: {}
  await ModuleSelectorTestingKit::withTaskCancellationHandler {} onCancel: {}
  // expected-error@-1 {{'withTaskCancellationHandler' is not imported through module 'ModuleSelectorTestingKit'}}
  // expected-note@-2 {{did you mean module 'Swift'?}} {{9-33=Swift}}
}

func dependentTypeLookup<T, U, V, W, X>(_: T, _: U, _: V, _: W, _: X) where
  T: Identifiable, T: ComparableIdentifiable, T.ID == Int,
  U: Identifiable, U: ComparableIdentifiable, U.Swift::ID == Int,
  // expected-error@-1 {{module selector is not allowed on generic member type; associated types with the same name are merged instead of shadowing one another}} {{49-56=}}
  V: Identifiable, V: ComparableIdentifiable, V.ModuleSelectorTestingKit::ID == Int,
  // expected-error@-1 {{module selector is not allowed on generic member type; associated types with the same name are merged instead of shadowing one another}} {{49-75=}}
  W: Identifiable, W: ComparableIdentifiable, W.ctypes::ID == Int,
  // expected-error@-1 {{module selector is not allowed on generic member type; associated types with the same name are merged instead of shadowing one another}} {{49-57=}}
  X: Identifiable, X: ComparableIdentifiable, X.NonexistentModule::ID == Int
  // expected-error@-1 {{module selector is not allowed on generic member type; associated types with the same name are merged instead of shadowing one another}} {{49-68=}}
{}