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116 lines
3.6 KiB
Swift
116 lines
3.6 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-build-swift -swift-version 5 -I %swift-host-lib-dir -L %swift-host-lib-dir -emit-library -o %t/%target-library-name(MacroDefinition) -module-name=MacroDefinition %S/Inputs/syntax_macro_definitions.swift -g -no-toolchain-stdlib-rpath
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// RUNx: %target-swift-frontend -dump-ast -enable-experimental-feature Macros -load-plugin-library %t/%target-library-name(MacroDefinition) -I %swift-host-lib-dir %s -module-name MacroUser 2>&1 | %FileCheck --check-prefix CHECK-AST %s
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// RUN: %target-typecheck-verify-swift -swift-version 5 -enable-experimental-feature Macros -load-plugin-library %t/%target-library-name(MacroDefinition) -I %swift-host-lib-dir -module-name MacroUser -DTEST_DIAGNOSTICS -swift-version 5
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// RUN: %target-build-swift -swift-version 5 -enable-experimental-feature Macros -load-plugin-library %t/%target-library-name(MacroDefinition) -I %swift-host-lib-dir -L %swift-host-lib-dir %s -o %t/main -module-name MacroUser -swift-version 5
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// RUN: %target-run %t/main | %FileCheck %s
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// REQUIRES: executable_test
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// FIXME: Swift parser is not enabled on Linux CI yet.
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// REQUIRES: OS=macosx
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@attached(memberAttribute) macro wrapAllProperties() = #externalMacro(module: "MacroDefinition", type: "WrapAllProperties")
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@attached(memberAttribute)
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public macro wrapStoredProperties(_ attributeName: String) = #externalMacro(module: "MacroDefinition", type: "WrapStoredPropertiesMacro")
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@propertyWrapper
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struct Wrapper<T> {
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init(wrappedValue: T) {
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print("initializing wrapper with \(wrappedValue)")
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self.wrappedValue = wrappedValue
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}
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var wrappedValue: T {
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willSet { print("setting \(newValue)") }
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}
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}
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protocol P {
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func reading<EnclosingSelf, Value>(from keyPath: KeyPath<EnclosingSelf, Value>)
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func writing<EnclosingSelf, Value>(to keyPath: KeyPath<EnclosingSelf, Value>)
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}
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extension P {
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func reading<EnclosingSelf, Value>(from keyPath: KeyPath<EnclosingSelf, Value>) {
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print("reading from key-path")
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}
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func writing<EnclosingSelf, Value>(to keyPath: KeyPath<EnclosingSelf, Value>) {
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print("writing to key-path")
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}
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}
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@propertyWrapper
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struct EnclosingSelfWrapper<Value> {
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private var stored: Value
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init(wrappedValue: Value) { self.stored = wrappedValue }
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@available(*, unavailable)
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var wrappedValue: Value {
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get { fatalError() }
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set { fatalError() }
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}
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static subscript<EnclosingSelf: P>(
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_enclosingInstance observed: EnclosingSelf,
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wrapped wrappedKeyPath: ReferenceWritableKeyPath<EnclosingSelf, Value>,
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storage storageKeyPath: ReferenceWritableKeyPath<EnclosingSelf, Self>
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) -> Value {
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get {
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observed.reading(from: wrappedKeyPath)
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return observed[keyPath: storageKeyPath].stored
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}
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set {
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observed.writing(to: wrappedKeyPath)
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observed[keyPath: storageKeyPath].stored = newValue
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}
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}
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}
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@wrapAllProperties
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struct S {
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var x: Int
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var y: Int
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}
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// CHECK: initializing wrapper with 0
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// CHECK: initializing wrapper with 1
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var s = S(x: 0, y: 1)
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// CHECK: setting 10
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s.x = 10
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// CHECK: setting 100
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s.y = 100
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@wrapAllProperties
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class C: P {
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var x: Int = 0
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var y: Int = 0
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}
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var c = C()
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// CHECK: reading from key-path
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_ = c.x
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// CHECK: reading from key-path
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_ = c.y
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// CHECK: writing to key-path
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c.x = 10
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// CHECK: writing to key-path
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c.y = 100
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// Use the "wrapStoredProperties" macro to deprecate all of the stored
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// properties.
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@wrapStoredProperties(#"available(*, deprecated, message: "hands off my data")"#)
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struct OldStorage {
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var x: Int
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}
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// The deprecation warning below comes from the deprecation attribute
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// introduced by @wrapStoredProperties on OldStorage.
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_ = OldStorage(x: 5).x // expected-warning{{'x' is deprecated: hands off my data}}
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