mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
116 lines
3.4 KiB
Swift
116 lines
3.4 KiB
Swift
// RUN: %target-parse-verify-swift
|
|
|
|
extension extension_for_invalid_type_1 { // expected-error {{use of undeclared type 'extension_for_invalid_type_1'}}
|
|
func f() { }
|
|
}
|
|
extension extension_for_invalid_type_2 { // expected-error {{use of undeclared type 'extension_for_invalid_type_2'}}
|
|
static func f() { }
|
|
}
|
|
extension extension_for_invalid_type_3 { // expected-error {{use of undeclared type 'extension_for_invalid_type_3'}}
|
|
init() {}
|
|
}
|
|
extension extension_for_invalid_type_4 { // expected-error {{use of undeclared type 'extension_for_invalid_type_4'}}
|
|
deinit {} // expected-error {{deinitializers may only be declared within a class}}
|
|
}
|
|
extension extension_for_invalid_type_5 { // expected-error {{use of undeclared type 'extension_for_invalid_type_5'}}
|
|
typealias X = Int
|
|
}
|
|
|
|
//===--- Test that we only allow extensions at file scope.
|
|
|
|
extension NestingTest1 { // expected-error {{use of undeclared type 'NestingTest1'}}
|
|
extension Foo {} // expected-error {{declaration is only valid at file scope}}
|
|
}
|
|
struct NestingTest2 {
|
|
extension Foo {} // expected-error {{declaration is only valid at file scope}}
|
|
}
|
|
class NestingTest3 {
|
|
extension Foo {} // expected-error {{declaration is only valid at file scope}}
|
|
}
|
|
enum NestingTest4 {
|
|
extension Foo {} // expected-error {{declaration is only valid at file scope}}
|
|
}
|
|
protocol NestingTest5 {
|
|
extension Foo {} // expected-error {{declaration is only valid at file scope}}
|
|
}
|
|
func nestingTest6() {
|
|
extension Foo {} // expected-error {{declaration is only valid at file scope}}
|
|
}
|
|
|
|
//===--- Test that we only allow extensions only for nominal types.
|
|
|
|
struct S1 {
|
|
struct NestedStruct {}
|
|
}
|
|
extension S1 {} // no-error
|
|
extension S1.Type {} // expected-error {{cannot extend a metatype 'S1.Type'}}
|
|
extension S1.NestedStruct {} // no-error
|
|
|
|
struct S1_2 {
|
|
// expected-error @+4 {{type member may not be named 'Type', since it would conflict with the 'foo.Type' expression}}
|
|
// expected-error @+3 {{type member may not be named 'Type', since it would conflict with the 'foo.Type' expression}}
|
|
// expected-note @+2 {{backticks can escape this name if it is important to use}} {{8-12=`Type`}}
|
|
// expected-note @+1 {{backticks can escape this name if it is important to use}} {{8-12=`Type`}}
|
|
enum Type {}
|
|
}
|
|
struct S1_3 {
|
|
enum `Type` {} // no-error
|
|
}
|
|
|
|
extension S1_2.Type {} // expected-error {{cannot extend a metatype 'S1_2.Type'}}
|
|
extension S1_3.`Type` {} // no-error
|
|
|
|
typealias TA_S1 = S1
|
|
extension TA_S1 {} // no-error
|
|
|
|
typealias TA_S1_NestedStruct = S1.NestedStruct
|
|
extension TA_S1_NestedStruct {} // no-error
|
|
|
|
enum U1 {
|
|
struct NestedStruct {}
|
|
}
|
|
extension U1 {} // no-error
|
|
extension U1.NestedStruct {} // no-error
|
|
|
|
class C1 {
|
|
struct NestedStruct {}
|
|
}
|
|
extension C1 {} // no-error
|
|
extension C1.NestedStruct {} // no-error
|
|
|
|
protocol P1 {}
|
|
|
|
protocol P2 {}
|
|
|
|
extension () {} // expected-error {{non-nominal type '()' cannot be extended}}
|
|
|
|
typealias TupleAlias = (x: Int, y: Int)
|
|
extension TupleAlias {} // expected-error{{non-nominal type 'TupleAlias' (aka '(x: Int, y: Int)') cannot be extended}}
|
|
|
|
// Test property accessors in extended types
|
|
class C {}
|
|
extension C {
|
|
var p1: Int {
|
|
get {return 1}
|
|
set(v) {}
|
|
}
|
|
}
|
|
var c = C()
|
|
var x = c.p1
|
|
c.p1 = 1
|
|
|
|
protocol P3 {
|
|
associatedtype Assoc
|
|
func foo() -> Assoc
|
|
}
|
|
|
|
struct X3 : P3 {
|
|
}
|
|
|
|
extension X3.Assoc { // expected-error{{'Assoc' is not a member type of 'X3'}}
|
|
}
|
|
|
|
extension X3 {
|
|
func foo() -> Int { return 0 }
|
|
}
|