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34f8670d2a
This PR migrates instance member on type and type member on instance diagnostics handling to use the new diagnostics framework (fixes) and create more reliable and accurate diagnostics in such scenarios.
345 lines
11 KiB
Swift
345 lines
11 KiB
Swift
// RUN: %target-typecheck-verify-swift
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// Protocols with superclass-constrained Self.
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class Concrete {
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typealias ConcreteAlias = String
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func concreteMethod(_: ConcreteAlias) {}
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}
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class Generic<T> : Concrete {
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typealias GenericAlias = (T, T)
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func genericMethod(_: GenericAlias) {}
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}
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protocol BaseProto {}
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protocol ProtoRefinesClass where Self : Generic<Int>, Self : BaseProto {
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func requirementUsesClassTypes(_: ConcreteAlias, _: GenericAlias)
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// expected-note@-1 {{protocol requires function 'requirementUsesClassTypes' with type '(Generic<Int>.ConcreteAlias, Generic<Int>.GenericAlias) -> ()' (aka '(String, (Int, Int)) -> ()'); do you want to add a stub?}}
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}
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func duplicateOverload<T : ProtoRefinesClass>(_: T) {}
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// expected-note@-1 {{'duplicateOverload' previously declared here}}
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func duplicateOverload<T : ProtoRefinesClass & Generic<Int>>(_: T) {}
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// expected-error@-1 {{invalid redeclaration of 'duplicateOverload'}}
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// expected-warning@-2 {{redundant superclass constraint 'T' : 'Generic<Int>'}}
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// expected-note@-3 {{superclass constraint 'T' : 'Generic<Int>' implied here}}
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extension ProtoRefinesClass {
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func extensionMethodUsesClassTypes(_ x: ConcreteAlias, _ y: GenericAlias) {
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_ = ConcreteAlias.self
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_ = GenericAlias.self
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concreteMethod(x)
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genericMethod(y)
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let _: Generic<Int> = self
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let _: Concrete = self
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let _: BaseProto = self
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let _: BaseProto & Generic<Int> = self
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let _: BaseProto & Concrete = self
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let _: Generic<String> = self
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// expected-error@-1 {{cannot convert value of type 'Self' to specified type 'Generic<String>'}}
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}
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}
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func usesProtoRefinesClass1(_ t: ProtoRefinesClass) {
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let x: ProtoRefinesClass.ConcreteAlias = "hi"
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_ = ProtoRefinesClass.ConcreteAlias.self
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t.concreteMethod(x)
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let y: ProtoRefinesClass.GenericAlias = (1, 2)
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_ = ProtoRefinesClass.GenericAlias.self
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t.genericMethod(y)
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t.requirementUsesClassTypes(x, y)
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let _: Generic<Int> = t
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let _: Concrete = t
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let _: BaseProto = t
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let _: BaseProto & Generic<Int> = t
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let _: BaseProto & Concrete = t
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let _: Generic<String> = t
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// expected-error@-1 {{cannot convert value of type 'ProtoRefinesClass' to specified type 'Generic<String>'}}
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}
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func usesProtoRefinesClass2<T : ProtoRefinesClass>(_ t: T) {
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let x: T.ConcreteAlias = "hi"
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_ = T.ConcreteAlias.self
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t.concreteMethod(x)
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let y: T.GenericAlias = (1, 2)
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_ = T.GenericAlias.self
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t.genericMethod(y)
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t.requirementUsesClassTypes(x, y)
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let _: Generic<Int> = t
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let _: Concrete = t
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let _: BaseProto = t
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let _: BaseProto & Generic<Int> = t
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let _: BaseProto & Concrete = t
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let _: Generic<String> = t
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// expected-error@-1 {{cannot convert value of type 'T' to specified type 'Generic<String>'}}
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}
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class BadConformingClass1 : ProtoRefinesClass {
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// expected-error@-1 {{'ProtoRefinesClass' requires that 'BadConformingClass1' inherit from 'Generic<Int>'}}
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// expected-note@-2 {{requirement specified as 'Self' : 'Generic<Int>' [with Self = BadConformingClass1]}}
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func requirementUsesClassTypes(_: ConcreteAlias, _: GenericAlias) {
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// expected-error@-1 {{use of undeclared type 'ConcreteAlias'}}
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// expected-error@-2 {{use of undeclared type 'GenericAlias'}}
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_ = ConcreteAlias.self
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// expected-error@-1 {{use of unresolved identifier 'ConcreteAlias'}}
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_ = GenericAlias.self
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// expected-error@-1 {{use of unresolved identifier 'GenericAlias'}}
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}
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}
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class BadConformingClass2 : Generic<String>, ProtoRefinesClass {
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// expected-error@-1 {{'ProtoRefinesClass' requires that 'BadConformingClass2' inherit from 'Generic<Int>'}}
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// expected-note@-2 {{requirement specified as 'Self' : 'Generic<Int>' [with Self = BadConformingClass2]}}
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// expected-error@-3 {{type 'BadConformingClass2' does not conform to protocol 'ProtoRefinesClass'}}
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func requirementUsesClassTypes(_: ConcreteAlias, _: GenericAlias) {
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// expected-note@-1 {{candidate has non-matching type '(BadConformingClass2.ConcreteAlias, BadConformingClass2.GenericAlias) -> ()' (aka '(String, (String, String)) -> ()')}}
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_ = ConcreteAlias.self
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_ = GenericAlias.self
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}
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}
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class GoodConformingClass : Generic<Int>, ProtoRefinesClass {
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func requirementUsesClassTypes(_ x: ConcreteAlias, _ y: GenericAlias) {
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_ = ConcreteAlias.self
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_ = GenericAlias.self
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concreteMethod(x)
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genericMethod(y)
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}
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}
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protocol ProtoRefinesProtoWithClass where Self : ProtoRefinesClass {}
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extension ProtoRefinesProtoWithClass {
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func anotherExtensionMethodUsesClassTypes(_ x: ConcreteAlias, _ y: GenericAlias) {
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_ = ConcreteAlias.self
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_ = GenericAlias.self
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concreteMethod(x)
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genericMethod(y)
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let _: Generic<Int> = self
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let _: Concrete = self
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let _: BaseProto = self
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let _: BaseProto & Generic<Int> = self
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let _: BaseProto & Concrete = self
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let _: Generic<String> = self
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// expected-error@-1 {{cannot convert value of type 'Self' to specified type 'Generic<String>'}}
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}
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}
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func usesProtoRefinesProtoWithClass1(_ t: ProtoRefinesProtoWithClass) {
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let x: ProtoRefinesProtoWithClass.ConcreteAlias = "hi"
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_ = ProtoRefinesProtoWithClass.ConcreteAlias.self
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t.concreteMethod(x)
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let y: ProtoRefinesProtoWithClass.GenericAlias = (1, 2)
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_ = ProtoRefinesProtoWithClass.GenericAlias.self
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t.genericMethod(y)
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t.requirementUsesClassTypes(x, y)
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let _: Generic<Int> = t
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let _: Concrete = t
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let _: BaseProto = t
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let _: BaseProto & Generic<Int> = t
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let _: BaseProto & Concrete = t
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let _: Generic<String> = t
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// expected-error@-1 {{cannot convert value of type 'ProtoRefinesProtoWithClass' to specified type 'Generic<String>'}}
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}
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func usesProtoRefinesProtoWithClass2<T : ProtoRefinesProtoWithClass>(_ t: T) {
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let x: T.ConcreteAlias = "hi"
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_ = T.ConcreteAlias.self
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t.concreteMethod(x)
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let y: T.GenericAlias = (1, 2)
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_ = T.GenericAlias.self
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t.genericMethod(y)
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t.requirementUsesClassTypes(x, y)
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let _: Generic<Int> = t
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let _: Concrete = t
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let _: BaseProto = t
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let _: BaseProto & Generic<Int> = t
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let _: BaseProto & Concrete = t
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let _: Generic<String> = t
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// expected-error@-1 {{cannot convert value of type 'T' to specified type 'Generic<String>'}}
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}
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class ClassWithInits<T> {
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init(notRequiredInit: ()) {}
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// expected-note@-1 6{{selected non-required initializer 'init(notRequiredInit:)'}}
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required init(requiredInit: ()) {}
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}
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protocol ProtocolWithClassInits where Self : ClassWithInits<Int> {}
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func useProtocolWithClassInits1() {
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_ = ProtocolWithClassInits(notRequiredInit: ())
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// expected-error@-1 {{protocol type 'ProtocolWithClassInits' cannot be instantiated}}
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_ = ProtocolWithClassInits(requiredInit: ())
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// expected-error@-1 {{protocol type 'ProtocolWithClassInits' cannot be instantiated}}
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}
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func useProtocolWithClassInits2(_ t: ProtocolWithClassInits.Type) {
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_ = t.init(notRequiredInit: ())
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// expected-error@-1 {{constructing an object of class type 'ProtocolWithClassInits' with a metatype value must use a 'required' initializer}}
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let _: ProtocolWithClassInits = t.init(requiredInit: ())
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}
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func useProtocolWithClassInits3<T : ProtocolWithClassInits>(_ t: T.Type) {
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_ = T(notRequiredInit: ())
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// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
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let _: T = T(requiredInit: ())
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_ = t.init(notRequiredInit: ())
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// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
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let _: T = t.init(requiredInit: ())
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}
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protocol ProtocolRefinesClassInits : ProtocolWithClassInits {}
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func useProtocolRefinesClassInits1() {
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_ = ProtocolRefinesClassInits(notRequiredInit: ())
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// expected-error@-1 {{protocol type 'ProtocolRefinesClassInits' cannot be instantiated}}
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_ = ProtocolRefinesClassInits(requiredInit: ())
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// expected-error@-1 {{protocol type 'ProtocolRefinesClassInits' cannot be instantiated}}
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}
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func useProtocolRefinesClassInits2(_ t: ProtocolRefinesClassInits.Type) {
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_ = t.init(notRequiredInit: ())
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// expected-error@-1 {{constructing an object of class type 'ProtocolRefinesClassInits' with a metatype value must use a 'required' initializer}}
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let _: ProtocolRefinesClassInits = t.init(requiredInit: ())
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}
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func useProtocolRefinesClassInits3<T : ProtocolRefinesClassInits>(_ t: T.Type) {
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_ = T(notRequiredInit: ())
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// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
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let _: T = T(requiredInit: ())
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_ = t.init(notRequiredInit: ())
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// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
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let _: T = t.init(requiredInit: ())
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}
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// Make sure that we don't require 'mutating' when the protocol has a superclass
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// constraint.
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protocol HasMutableProperty : Concrete {
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var mutableThingy: Any? { get set }
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}
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extension HasMutableProperty {
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func mutateThingy() {
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mutableThingy = nil
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}
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}
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// Some pathological examples -- just make sure they don't crash.
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protocol RecursiveSelf where Self : Generic<Self> {}
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// expected-error@-1 {{superclass constraint 'Self' : 'Generic<Self>' is recursive}}
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protocol RecursiveAssociatedType where Self : Generic<Self.X> {
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// expected-error@-1 {{superclass constraint 'Self' : 'Generic<Self.X>' is recursive}}
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associatedtype X
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}
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protocol BaseProtocol {
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typealias T = Int
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}
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class BaseClass : BaseProtocol {}
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protocol RefinedProtocol where Self : BaseClass {
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func takesT(_: T)
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}
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class RefinedClass : BaseClass, RefinedProtocol {
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func takesT(_: T) {
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_ = T.self
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}
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}
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func takesBaseProtocol(_: BaseProtocol) {}
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func passesRefinedProtocol(_ r: RefinedProtocol) {
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takesBaseProtocol(r)
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}
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class LoopClass : LoopProto {}
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protocol LoopProto where Self : LoopClass {}
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class FirstClass {}
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protocol FirstProtocol where Self : FirstClass {}
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class SecondClass : FirstClass {}
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protocol SecondProtocol where Self : SecondClass, Self : FirstProtocol {}
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class FirstConformer : FirstClass, SecondProtocol {}
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// expected-error@-1 {{'SecondProtocol' requires that 'FirstConformer' inherit from 'SecondClass'}}
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// expected-note@-2 {{requirement specified as 'Self' : 'SecondClass' [with Self = FirstConformer]}}
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class SecondConformer : SecondClass, SecondProtocol {}
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// Duplicate superclass
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// FIXME: Should be an error here too
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protocol DuplicateSuper1 : Concrete where Self : Concrete {}
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// expected-note@-1 {{superclass constraint 'Self' : 'Concrete' written here}}
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// expected-warning@-2 {{redundant superclass constraint 'Self' : 'Concrete'}}
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protocol DuplicateSuper2 where Self : Concrete, Self : Concrete {}
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// expected-note@-1 {{superclass constraint 'Self' : 'Concrete' written here}}
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// expected-warning@-2 {{redundant superclass constraint 'Self' : 'Concrete'}}
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// Ambiguous name lookup situation
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protocol Amb where Self : Concrete {}
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// expected-note@-1 {{'Amb' previously declared here}}
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// expected-note@-2 {{found this candidate}}
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protocol Amb where Self : Concrete {}
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// expected-error@-1 {{invalid redeclaration of 'Amb'}}
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// expected-note@-2 {{found this candidate}}
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extension Amb { // expected-error {{'Amb' is ambiguous for type lookup in this context}}
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func extensionMethodUsesClassTypes() {
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_ = ConcreteAlias.self
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}
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}
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