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// RUN: %target-typecheck-verify-swift
protocol P1 {
func foo() // expected-note {{protocol requires function 'foo()'}}
func bar() // okay
}
extension P1 {
func bar() {} // okay
}
struct P1Conformer : P1 {} // expected-error {{does not conform}}
protocol P2 {
func foo() // expected-note {{protocol requires function 'foo()'}}
func bar() // expected-note {{protocol requires function 'bar()'}}
}
protocol P2Helper {}
extension P2 where Self : P2Helper {
func bar() {} // expected-note {{candidate}}
}
struct P2Conformer : P2 {} // expected-error {{does not conform}}
protocol P3 {
func foo() // expected-note {{protocol requires function 'foo()'}}
func bar() // okay
func baz() -> Baz
associatedtype Baz
}
extension P3 {
func bar() {} // okay
}
struct P3Conformer : P3 { // expected-error {{does not conform}}
func baz() -> Int { return 0 }
}
protocol P4 {
func foo() // expected-note {{protocol requires function 'foo()'}}
func bar() // expected-note {{protocol requires function 'bar()'}}
func baz() -> Baz // okay
associatedtype Baz
}
protocol P4Helper {}
extension P4 where Self : P4Helper {
func bar() {} // expected-note {{candidate}}
}
struct P4Conformer : P4 { // expected-error {{does not conform}}
func baz() -> Int { return 0 }
}
protocol P5 {
associatedtype Foo
func foo() -> Foo // expected-note {{protocol requires function 'foo()'}}
func bar() -> Foo // okay
func baz() -> Foo // okay
}
extension P5 {
func bar() -> Foo { return foo() } // okay
}
struct P5Conformer : P5 { // expected-error {{does not conform}}
func baz() -> Int { return 0 }
}
protocol P6Base {
associatedtype Foo // expected-note{{protocol requires nested type 'Foo'; add nested type 'Foo' for conformance}}
func foo()
func bar() -> Foo
}
extension P6Base {
}
protocol P6 : P6Base {
associatedtype Bar // expected-note {{protocol requires nested type 'Bar'}}
}
extension P6 {
func bar() -> Bar? { return nil }
}
struct P6Conformer : P6 { // expected-error 2 {{does not conform}}
func foo() {}
}
// rdar://problem/23033862
// expected-error@+2{{type 'A' does not conform to protocol 'OptionSet'}}
// expected-error@+1{{type 'A' does not conform to protocol 'RawRepresentable'}}
struct A: OptionSet {
let rawValue = 0
init() { }
}
// Type witness cannot have its own generic parameters
// FIXME: Crappy diagnostic
protocol PA {
associatedtype A // expected-note 3 {{protocol requires nested type 'A'; add nested type 'A' for conformance}}
}
struct BadCase1 : PA { // expected-error {{type 'BadCase1' does not conform to protocol 'PA'}}
struct A<T> {}
}
struct BadCase2 : PA { // expected-error {{type 'BadCase2' does not conform to protocol 'PA'}}
typealias A<T> = T
}
// Variation on the above
struct G<T> {}
struct BadCase3 : PA { // expected-error {{type 'BadCase3' does not conform to protocol 'PA'}}
typealias A = G
}
// rdar://problem/32215763
extension UInt32: @retroactive ExpressibleByStringLiteral {}
// expected-error@-1 {{type 'UInt32' does not conform to protocol 'ExpressibleByStringLiteral'}}
// expected-error@-2 {{type 'UInt32' does not conform to protocol 'ExpressibleByExtendedGraphemeClusterLiteral'}}
// expected-error@-3 {{type 'UInt32' does not conform to protocol 'ExpressibleByUnicodeScalarLiteral'}}
// After successfully type-checking this (due to the presumption of
// the type actually conforming), do not crash when failing to find
// the associated witness type.
let diagnose: UInt32 = "reta"
// Test that we attempt to resolve a value witness unless mapping its interface
// type into the conformance context produces an invalid type.
protocol P7 {
associatedtype A: Sequence // expected-note {{protocol requires nested type 'A'; add nested type 'A' for conformance}}
subscript(subscript1 _: A) -> Never { get }
subscript<T>(subscript2 _: T) -> Never where T: Sequence, T.Element == A { get }
// expected-note@-1 {{protocol requires subscript with type '<T> (subscript2: T) -> Never'; add a stub for conformance}}
func method1(_: A)
func method2() -> A.Element
func method3<T>(_: T) where T: Sequence, T.Element == A
// expected-note@-1 {{protocol requires function 'method3' with type '<T> (T) -> ()'; add a stub for conformance}}
func method4(_: Never) // expected-note {{protocol requires function 'method4' with type '(Never) -> ()'; add a stub for conformance}}
}
do {
struct Conformer: P7 {} // expected-error {{type 'Conformer' does not conform to protocol 'P7'}}
}
protocol P8 {
associatedtype A: Sequence where A.Element == Never
func method1(_: A) // expected-note {{protocol requires function 'method1' with type '(Conformer.A) -> ()' (aka '(Array<Bool>) -> ()'); add a stub for conformance}}
func method2() -> A.Element // expected-note {{protocol requires function 'method2()' with type '() -> Bool'; add a stub for conformance}}
func method3<T>(_: T) where T: Sequence, T.Element == A
// expected-note@-1 {{protocol requires function 'method3' with type '<T> (T) -> ()'; add a stub for conformance}}
func method4(_: Never) // expected-note {{protocol requires function 'method4' with type '(Never) -> ()'; add a stub for conformance}}
}
do {
struct Conformer: P8 {
// expected-error@-1 {{type 'Conformer' does not conform to protocol 'P8'}}
// expected-error@-2 {{'P8' requires the types 'Bool' and 'Never' be equivalent}}
// expected-note@-3 {{requirement specified as 'Self.A.Element' == 'Never' [with Self = Conformer]}}
typealias A = Array<Bool>
}
}
protocol P9a {
associatedtype A
}
protocol P9b: P9a where A: Sequence {
subscript(subscript1 _: A.Element) -> Never { get }
subscript<T>(subscript2 _: T) -> Never where T: Sequence, T.Element == A.Element { get }
// expected-note@-1 {{protocol requires subscript with type '<T> (subscript2: T) -> Never'; add a stub for conformance}}
func method1(_: A) // expected-note {{protocol requires function 'method1' with type '(Conformer.A) -> ()' (aka '(Bool) -> ()'); add a stub for conformance}}
func method2() -> A.Element
func method3<T>(_: T) where T: Sequence, T.Element == A
// expected-note@-1 {{protocol requires function 'method3' with type '<T> (T) -> ()'; add a stub for conformance}}
func method4(_: Never) // expected-note {{protocol requires function 'method4' with type '(Never) -> ()'; add a stub for conformance}}
}
do {
struct Conformer: P9b {
// expected-error@-1 {{type 'Conformer' does not conform to protocol 'P9b'}}
// expected-error@-2 {{type 'Conformer.A' (aka 'Bool') does not conform to protocol 'Sequence'}}
typealias A = Bool
}
}
protocol P10a {
associatedtype A
}
protocol P10b: P10a where A: Sequence, A.Element == Never {
func method1(_: A) // expected-note {{protocol requires function 'method1' with type '(Conformer.A) -> ()' (aka '(Array<Bool>) -> ()'); add a stub for conformance}}
func method2() -> A.Element // expected-note {{protocol requires function 'method2()' with type '() -> Bool'; add a stub for conformance}}
func method3<T>(_: T) where T: Sequence, T.Element == A
// expected-note@-1 {{protocol requires function 'method3' with type '<T> (T) -> ()'; add a stub for conformance}}
func method4(_: Never) // expected-note {{protocol requires function 'method4' with type '(Never) -> ()'; add a stub for conformance}}
}
do {
struct Conformer: P10b {
// expected-error@-1 {{type 'Conformer' does not conform to protocol 'P10b'}}
// expected-error@-2 {{'P10b' requires the types 'Bool' and 'Never' be equivalent}}
// expected-note@-3 {{requirement specified as 'Self.A.Element' == 'Never' [with Self = Conformer]}}
typealias A = Array<Bool>
}
}
protocol P11 {
associatedtype A: Equatable
// FIXME: Should not resolve witness for 'method', but Type::subst doesn't care
// about conditional requirements when querying type witnesses.
// expected-note@+1 {{protocol requires function 'method()' with type '() -> Conformer.A' (aka '() -> Array<any P11>'); add a stub for conformance}}
func method() -> A
}
do {
struct Conformer: P11 {
// expected-error@-1 {{type 'Conformer' does not conform to protocol 'P11'}}
// expected-error@-2 {{type 'any P11' does not conform to protocol 'Equatable'}} // FIXME: Crappy diagnostics
// expected-error@-3 {{'P11' requires that 'any P11' conform to 'Equatable'}}
// expected-note@-4 {{requirement specified as 'any P11' : 'Equatable'}}
// expected-note@-5 {{requirement from conditional conformance of 'Conformer.A' (aka 'Array<any P11>') to 'Equatable'}}
typealias A = Array<any P11>
}
}
protocol P12 {
associatedtype A: Sequence where A.Element == Never // expected-note {{protocol requires nested type 'A'; add nested type 'A' for conformance}}
// FIXME: Should not resolve witness for 'prop', but getInterfaceType() returns
// '(Self) -> Never' instead of '(Self) -> Self.A.Element', and the invalid
// type parameter is never found (see 'hasInvalidTypeInConformanceContext').
// This happens because getInterfaceType() on properties returns contextual
// types that have been mapped out of context, but mapTypeOutOfContext() does
// not reconstitute type parameters that were substituted with concrete types.
// Instead, patterns should be refactored to use interface types, at least if
// they appear in type contexts.
//
// expected-note@+1 {{protocol requires property 'prop' with type '(Conformer) -> Never'; add a stub for conformance}}
var prop: (Self) -> A.Element { get }
}
do {
struct Conformer: P12 { // expected-error {{type 'Conformer' does not conform to protocol 'P12'}}
typealias A = Bool // expected-note {{possibly intended match 'Conformer.A' (aka 'Bool') does not conform to 'Sequence'}}
}
}
class Class13 {}
protocol P13a {
associatedtype A
}
protocol P13b: P13a where A: Class13 {}
do {
struct Conformer: P13b {
// expected-error@-1 {{type 'Conformer' does not conform to protocol 'P13b'}}
// expected-error@-2 {{'P13b' requires that 'Conformer.A' (aka 'Array<Bool>') inherit from 'Class13'}}
// expected-note@-3 {{requirement specified as 'Self.A' : 'Class13' [with Self = Conformer]}}
typealias A = Array<Bool>
}
}
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