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// RUN: %target-typecheck-verify-swift
// Protocols with superclass-constrained Self.
class Concrete {
typealias ConcreteAlias = String
func concreteMethod(_: ConcreteAlias) {}
}
class Generic<T> : Concrete { // expected-note 6 {{arguments to generic parameter 'T' ('Int' and 'String') are expected to be equal}}
typealias GenericAlias = (T, T)
func genericMethod(_: GenericAlias) {}
}
protocol BaseProto {}
protocol ProtoRefinesClass : Generic<Int>, BaseProto {
func requirementUsesClassTypes(_: ConcreteAlias, _: GenericAlias)
// expected-note@-1 {{protocol requires function 'requirementUsesClassTypes' with type '(Generic<Int>.ConcreteAlias, Generic<Int>.GenericAlias) -> ()' (aka '(String, (Int, Int)) -> ()'); add a stub for conformance}}
}
func duplicateOverload<T : ProtoRefinesClass>(_: T) {}
// expected-note@-1 {{'duplicateOverload' previously declared here}}
func duplicateOverload<T : ProtoRefinesClass & Generic<Int>>(_: T) {}
// expected-error@-1 {{invalid redeclaration of 'duplicateOverload'}}
extension ProtoRefinesClass {
func extensionMethodUsesClassTypes(_ x: ConcreteAlias, _ y: GenericAlias) {
_ = ConcreteAlias.self
_ = GenericAlias.self
concreteMethod(x)
genericMethod(y)
let _: Generic<Int> = self
let _: Concrete = self
let _: BaseProto = self
let _: BaseProto & Generic<Int> = self
let _: BaseProto & Concrete = self
let _: Generic<String> = self
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
}
func usesProtoRefinesClass1(_ t: ProtoRefinesClass) {
let x: ProtoRefinesClass.ConcreteAlias = "hi"
_ = ProtoRefinesClass.ConcreteAlias.self
t.concreteMethod(x)
let y: ProtoRefinesClass.GenericAlias = (1, 2)
_ = ProtoRefinesClass.GenericAlias.self
t.genericMethod(y)
t.requirementUsesClassTypes(x, y)
let _: Generic<Int> = t
let _: Concrete = t
let _: BaseProto = t
let _: BaseProto & Generic<Int> = t
let _: BaseProto & Concrete = t
let _: Generic<String> = t
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
func usesProtoRefinesClass2<T : ProtoRefinesClass>(_ t: T) {
let x: T.ConcreteAlias = "hi"
_ = T.ConcreteAlias.self
t.concreteMethod(x)
let y: T.GenericAlias = (1, 2)
_ = T.GenericAlias.self
t.genericMethod(y)
t.requirementUsesClassTypes(x, y)
let _: Generic<Int> = t
let _: Concrete = t
let _: BaseProto = t
let _: BaseProto & Generic<Int> = t
let _: BaseProto & Concrete = t
let _: Generic<String> = t
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
class BadConformingClass1 : ProtoRefinesClass {
// expected-error@-1 {{type 'BadConformingClass1' does not conform to protocol 'ProtoRefinesClass'}}
// expected-error@-2 {{'ProtoRefinesClass' requires that 'BadConformingClass1' inherit from 'Generic<Int>'}}
// expected-note@-3 {{requirement specified as 'Self' : 'Generic<Int>' [with Self = BadConformingClass1]}}
func requirementUsesClassTypes(_: ConcreteAlias, _: GenericAlias) {
// expected-error@-1 {{cannot find type 'ConcreteAlias' in scope}}
// expected-error@-2 {{cannot find type 'GenericAlias' in scope}}
_ = ConcreteAlias.self
// expected-error@-1 {{cannot find 'ConcreteAlias' in scope}}
_ = GenericAlias.self
// expected-error@-1 {{cannot find 'GenericAlias' in scope}}
}
}
class BadConformingClass2 : Generic<String>, ProtoRefinesClass {
// expected-error@-1 {{'ProtoRefinesClass' requires that 'BadConformingClass2' inherit from 'Generic<Int>'}}
// expected-note@-2 {{requirement specified as 'Self' : 'Generic<Int>' [with Self = BadConformingClass2]}}
// expected-error@-3 {{type 'BadConformingClass2' does not conform to protocol 'ProtoRefinesClass'}}
// expected-note@+1 {{candidate has non-matching type '(BadConformingClass2.ConcreteAlias, BadConformingClass2.GenericAlias) -> ()' (aka '(String, (String, String)) -> ()')}}
func requirementUsesClassTypes(_: ConcreteAlias, _: GenericAlias) {
_ = ConcreteAlias.self
_ = GenericAlias.self
}
}
class GoodConformingClass : Generic<Int>, ProtoRefinesClass {
func requirementUsesClassTypes(_ x: ConcreteAlias, _ y: GenericAlias) {
_ = ConcreteAlias.self
_ = GenericAlias.self
concreteMethod(x)
genericMethod(y)
}
}
protocol ProtoRefinesProtoWithClass : ProtoRefinesClass {}
extension ProtoRefinesProtoWithClass {
func anotherExtensionMethodUsesClassTypes(_ x: ConcreteAlias, _ y: GenericAlias) {
_ = ConcreteAlias.self
_ = GenericAlias.self
concreteMethod(x)
genericMethod(y)
let _: Generic<Int> = self
let _: Concrete = self
let _: BaseProto = self
let _: BaseProto & Generic<Int> = self
let _: BaseProto & Concrete = self
let _: Generic<String> = self
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
}
func usesProtoRefinesProtoWithClass1(_ t: ProtoRefinesProtoWithClass) {
let x: ProtoRefinesProtoWithClass.ConcreteAlias = "hi"
_ = ProtoRefinesProtoWithClass.ConcreteAlias.self
t.concreteMethod(x)
let y: ProtoRefinesProtoWithClass.GenericAlias = (1, 2)
_ = ProtoRefinesProtoWithClass.GenericAlias.self
t.genericMethod(y)
t.requirementUsesClassTypes(x, y)
let _: Generic<Int> = t
let _: Concrete = t
let _: BaseProto = t
let _: BaseProto & Generic<Int> = t
let _: BaseProto & Concrete = t
let _: Generic<String> = t
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
func usesProtoRefinesProtoWithClass2<T : ProtoRefinesProtoWithClass>(_ t: T) {
let x: T.ConcreteAlias = "hi"
_ = T.ConcreteAlias.self
t.concreteMethod(x)
let y: T.GenericAlias = (1, 2)
_ = T.GenericAlias.self
t.genericMethod(y)
t.requirementUsesClassTypes(x, y)
let _: Generic<Int> = t
let _: Concrete = t
let _: BaseProto = t
let _: BaseProto & Generic<Int> = t
let _: BaseProto & Concrete = t
let _: Generic<String> = t
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
class ClassWithInits<T> {
init(notRequiredInit: ()) {}
// expected-note@-1 6{{selected non-required initializer 'init(notRequiredInit:)'}}
required init(requiredInit: ()) {}
}
protocol ProtocolWithClassInits : ClassWithInits<Int> {}
func useProtocolWithClassInits1() {
_ = ProtocolWithClassInits(notRequiredInit: ())
// expected-error@-1 {{type 'any ProtocolWithClassInits' cannot be instantiated}}
_ = ProtocolWithClassInits(requiredInit: ())
// expected-error@-1 {{type 'any ProtocolWithClassInits' cannot be instantiated}}
}
func useProtocolWithClassInits2(_ t: ProtocolWithClassInits.Type) {
_ = t.init(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'any ProtocolWithClassInits' with a metatype value must use a 'required' initializer}}
let _: ProtocolWithClassInits = t.init(requiredInit: ())
}
func useProtocolWithClassInits3<T : ProtocolWithClassInits>(_ t: T.Type) {
_ = T(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
let _: T = T(requiredInit: ())
_ = t.init(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
let _: T = t.init(requiredInit: ())
}
protocol ProtocolRefinesClassInits : ProtocolWithClassInits {}
func useProtocolRefinesClassInits1() {
_ = ProtocolRefinesClassInits(notRequiredInit: ())
// expected-error@-1 {{type 'any ProtocolRefinesClassInits' cannot be instantiated}}
_ = ProtocolRefinesClassInits(requiredInit: ())
// expected-error@-1 {{type 'any ProtocolRefinesClassInits' cannot be instantiated}}
}
func useProtocolRefinesClassInits2(_ t: ProtocolRefinesClassInits.Type) {
_ = t.init(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'any ProtocolRefinesClassInits' with a metatype value must use a 'required' initializer}}
let _: ProtocolRefinesClassInits = t.init(requiredInit: ())
}
func useProtocolRefinesClassInits3<T : ProtocolRefinesClassInits>(_ t: T.Type) {
_ = T(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
let _: T = T(requiredInit: ())
_ = t.init(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
let _: T = t.init(requiredInit: ())
}
// Make sure that we don't require 'mutating' when the protocol has a superclass
// constraint.
protocol HasMutableProperty : Concrete {
var mutableThingy: Any? { get set }
}
extension HasMutableProperty {
func mutateThingy() {
mutableThingy = nil
}
}
// Some pathological examples -- just make sure they don't crash.
protocol RecursiveSelf : Generic<Self> {}
protocol RecursiveAssociatedType : Generic<Self.X> {
associatedtype X
}
protocol BaseProtocol {
typealias T = Int
}
class BaseClass : BaseProtocol {}
protocol RefinedProtocol : BaseClass {
func takesT(_: T)
}
func takesBaseProtocol(_: BaseProtocol) {}
func passesRefinedProtocol(_ r: RefinedProtocol) {
takesBaseProtocol(r)
}
class RefinedClass : BaseClass, RefinedProtocol {
func takesT(_: T) {
_ = T.self
}
}
class LoopClass : LoopProto {}
protocol LoopProto : LoopClass {}
class FirstClass {}
protocol FirstProtocol : FirstClass {}
class SecondClass : FirstClass {}
protocol SecondProtocol : SecondClass, FirstProtocol {}
class FirstConformer : FirstClass, SecondProtocol {}
// expected-error@-1 {{type 'FirstConformer' does not conform to protocol 'SecondProtocol'}}
// expected-error@-2 {{'SecondProtocol' requires that 'FirstConformer' inherit from 'SecondClass'}}
// expected-note@-3 {{requirement specified as 'Self' : 'SecondClass' [with Self = FirstConformer]}}
class SecondConformer : SecondClass, SecondProtocol {}
// Duplicate superclass
protocol DuplicateSuper : Concrete, Concrete {}
// expected-error@-1 {{duplicate inheritance from 'Concrete'}}
// Ambiguous name lookup situation
protocol Amb : Concrete {}
// expected-note@-1 {{'Amb' previously declared here}}
// expected-note@-2 {{found this candidate}}
protocol Amb : Concrete {}
// expected-error@-1 {{invalid redeclaration of 'Amb'}}
// expected-note@-2 {{found this candidate}}
extension Amb { // expected-error {{'Amb' is ambiguous for type lookup in this context}}
func extensionMethodUsesClassTypes() {
_ = ConcreteAlias.self
}
}
protocol ProtoRefinesClassComposition : Generic<Int> & BaseProto {}
func usesProtoRefinesClass1(_ t: ProtoRefinesClassComposition) {
t.genericMethod((1, 2))
let _: BaseProto = t
}
func usesProtoRefinesClass2<T : ProtoRefinesClassComposition>(_ t: T) {
t.genericMethod((1, 2))
let _: BaseProto = t
}
// https://github.com/apple/swift/issues/52883
class issue52883_C: issue52883_P {}
protocol issue52883_P: issue52883_C {
func foo()
}
extension issue52883_P {
func foo() {}
}
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