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ad8b0f3397
Allow `@_section` and `@_used` to be used in fully constrained extensions.
This aligns with the existing behavior of static properties of generic types. The following is valid:
```swift
extension Array where Element == Int {
static let specificConstant = 41
}
```
However, adding `@_section` or `@_used` to the above property, will result in an error diagnostic.
This change updates the logic of `@_section`/`@_used` to allow their use when the generic context is fully concrete.
74 lines
2.6 KiB
Swift
74 lines
2.6 KiB
Swift
// RUN: %target-swift-frontend -enable-experimental-feature SymbolLinkageMarkers -parse-as-library -emit-sil %s -o /dev/null -verify
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// REQUIRES: swift_in_compiler
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@_used @_section("__TEXT,__mysection") var g0: Int = 1 // ok
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struct MyStruct {
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@_used @_section("__TEXT,__mysection") static var static0: Int = 1 // ok
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}
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struct MyStruct2 {
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@_section("__TEXT,__mysection") var member0: Int = 1 // expected-error {{properties with attribute '_section' must be static}}
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@_section("__TEXT,__mysection") static var static1: Int { return 1 } // expected-error {{'@_section' must not be used on computed properties}}
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}
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struct MyStruct3<T> {
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static var member1: Int = 1 // expected-error {{static stored properties not supported in generic types}}
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@_section("__TEXT,__mysection") func foo() {} // expected-error {{attribute '_section' cannot be used in a generic context}}
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}
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struct MyStruct4<T> {
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struct InnerStruct {
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static var member2: Int = 1 // expected-error {{static stored properties not supported in generic types}}
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@_section("__TEXT,__mysection") static var member3: Int = 1 // expected-error {{static stored properties not supported in generic types}}
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// expected-error@-1 {{attribute '_section' cannot be used in a generic context}}
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@_section("__TEXT,__mysection") func foo() {} // expected-error {{attribute '_section' cannot be used in a generic context}}
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}
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}
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struct MyStruct5<T> {
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}
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extension MyStruct5 where T == Never {
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@_used @_section("__TEXT,__mysection") static let static3: Int = 1 // ok
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}
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@_section("__TEXT,__mysection") // expected-error {{'@_section' attribute cannot be applied to this declaration}}
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struct SomeStruct {}
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@_section("") var g1: Int = 1 // expected-error {{@_section section name cannot be empty}}
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func function() {
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@_section("__TEXT,__mysection") var l0: Int = 1 // expected-error {{attribute '_section' can only be used in a non-local scope}}
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l0 += 1
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_ = l0
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@_used var l1: Int = 1 // expected-error {{attribute '_used' can only be used in a non-local scope}}
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l1 += 1
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_ = l1
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}
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func function_with_type() {
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class MyClass {
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@_section("__TEXT,__mysection") static var member: Int = 1 // ok
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}
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do {
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class MyClass {
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@_section("__TEXT,__mysection") static var member: Int = 1 // ok
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}
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}
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}
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func function_with_type_generic<T>() -> T {
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class MyClass { // expected-error {{type 'MyClass' cannot be nested in generic function}}
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@_section("__TEXT,__mysection") static var member: Int = 1 // expected-error {{static stored properties not supported in generic types}}
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// expected-error@-1 {{attribute '_section' cannot be used in a generic context}}
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}
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}
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