mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
79 lines
3.0 KiB
Swift
79 lines
3.0 KiB
Swift
// RUN: %target-typecheck-verify-swift
|
|
|
|
// Test instantiation of constraint solver constraints from generic requirements
|
|
// involving type pack parameters
|
|
|
|
// Conformance requirements
|
|
|
|
protocol P {}
|
|
|
|
func takesP<each T: P>(_: repeat each T) {} // expected-note {{where 'each T' = 'DoesNotConformToP'}}
|
|
|
|
struct ConformsToP: P {}
|
|
struct DoesNotConformToP {}
|
|
|
|
takesP() // ok
|
|
takesP(ConformsToP(), ConformsToP(), ConformsToP()) // ok
|
|
|
|
takesP(ConformsToP(), DoesNotConformToP(), ConformsToP()) // expected-error {{global function 'takesP' requires that 'DoesNotConformToP' conform to 'P'}}
|
|
|
|
// Superclass requirements
|
|
|
|
class C {}
|
|
|
|
class SubclassOfC: C {}
|
|
class NotSubclassOfC {}
|
|
|
|
func takesC<each T: C>(_: repeat each T) {} // expected-note {{where 'each T' = 'NotSubclassOfC'}}
|
|
|
|
takesC() // ok
|
|
takesC(SubclassOfC(), SubclassOfC(), SubclassOfC()) // ok
|
|
|
|
takesC(SubclassOfC(), NotSubclassOfC(), SubclassOfC()) // expected-error {{global function 'takesC' requires that 'NotSubclassOfC' inherit from 'C'}}
|
|
|
|
// Layout requirements
|
|
|
|
struct S {}
|
|
|
|
func takesAnyObject<each T: AnyObject>(_: repeat each T) {}
|
|
|
|
takesAnyObject()
|
|
takesAnyObject(C(), C(), C())
|
|
|
|
// FIXME: Bad diagnostic
|
|
takesAnyObject(C(), S(), C()) // expected-error {{type of expression is ambiguous without a type annotation}}
|
|
|
|
// Same-type requirements
|
|
|
|
// expected-note@+1 {{where '(each T).Element' = 'String', '(each U).Element' = 'Int'}}
|
|
func takesParallelSequences<each T, each U>(t: repeat each T, u: repeat each U)
|
|
where repeat each T: Sequence,
|
|
repeat each U: Sequence,
|
|
repeat (each T).Element == (each U).Element {}
|
|
takesParallelSequences() // ok
|
|
takesParallelSequences(t: Array<Int>(), u: Set<Int>()) // ok
|
|
takesParallelSequences(t: Array<String>(), Set<Int>(), u: Set<String>(), Array<Int>()) // ok
|
|
takesParallelSequences(t: Array<String>(), Set<Int>(), u: Array<Int>(), Set<String>()) // expected-error {{global function 'takesParallelSequences(t:u:)' requires the types 'String' and 'Int' be equivalent}}
|
|
|
|
// Same-shape requirements
|
|
|
|
func zip<each T, each U>(t: repeat each T, u: repeat each U) -> (repeat (each T, each U)) {}
|
|
// expected-note@-1 {{'zip(t:u:)' declared here}}
|
|
|
|
let _ = zip() // ok
|
|
let _ = zip(t: 1, u: "hi") // ok
|
|
let _ = zip(t: 1, 2, u: "hi", "hello") // ok
|
|
let _ = zip(t: 1, 2, 3, u: "hi", "hello", "greetings") // ok
|
|
let _ = zip(t: 1, u: "hi", "hello", "greetings") // expected-error {{extra arguments at positions #3, #4 in call}}
|
|
// expected-error@-1 {{global function 'zip(t:u:)' requires the type packs 'Int' and 'String, String, String' have the same shape}}
|
|
|
|
func goodCallToZip<each T, each U>(t: repeat each T, u: repeat each U) where (repeat (each T, each U)): Any {
|
|
_ = zip(t: repeat each t, u: repeat each u)
|
|
}
|
|
|
|
func badCallToZip<each T, each U>(t: repeat each T, u: repeat each U) {
|
|
_ = zip(t: repeat each t, u: repeat each u)
|
|
// expected-error@-1 {{global function 'zip(t:u:)' requires the type packs 'each T' and 'each U' have the same shape}}
|
|
// expected-error@-2 {{pack expansion requires that 'each U' and 'each T' have the same shape}}
|
|
}
|