Merge pull request swiftlang#32910 from xymus/spi-property-wrappers-storage

[Sema] SPI groups on a wrapped property propagates to the backing storage

Author: xymus

lib/AST/Module.cpp

@@ -2053,7 +2053,15 @@ SPIGroupsRequest::evaluate(Evaluator &evaluator, const Decl *decl) const {
     for (auto spi : attr->getSPIGroups())
       spiGroups.insert(spi);
 
-  auto &ctx = decl->getASTContext();
+  // Backing storage for a wrapped property gets the SPI groups from the
+  // original property.
+  if (auto varDecl = dyn_cast<VarDecl>(decl))
+    if (auto originalDecl = varDecl->getOriginalWrappedProperty()) {
+      auto originalSPIs = originalDecl->getSPIGroups();
+      spiGroups.insert(originalSPIs.begin(), originalSPIs.end());
+    }
+
+  // If there is no local SPI information, look at the context.
   if (spiGroups.empty()) {
 
     // Then in the extended nominal type.
@@ -2073,6 +2081,7 @@ SPIGroupsRequest::evaluate(Evaluator &evaluator, const Decl *decl) const {
     }
   }
 
+  auto &ctx = decl->getASTContext();
   return ctx.AllocateCopy(spiGroups.getArrayRef());
 }
 

test/SPI/private_swiftinterface.swift

@@ -88,6 +88,45 @@ private class PrivateClassLocal {}
   // CHECK-PUBLIC-NOT: extensionSPIMethod
 }
 
+@propertyWrapper
+public struct Wrapper<T> {
+  public var value: T
+
+  public var wrappedValue: T {
+    get { value }
+    set { value = newValue }
+  }
+}
+
+@propertyWrapper
+public struct WrapperWithInitialValue<T> {
+  private var value: T
+
+  public var wrappedValue: T {
+    get { value }
+    set { value = newValue }
+  }
+
+  public var projectedValue: Wrapper<T> {
+    get { Wrapper(value: value) }
+    set { value = newValue.value }
+  }
+}
+
+public class SomeClass {
+}
+
+public struct PublicStruct {
+  @_spi(S) @Wrapper public var spiWrappedSimple: SomeClass
+  // CHECK-PRIVATE: @_spi(S) @{{.*}}.Wrapper public var spiWrappedSimple: {{.*}}.SomeClass
+  // CHECK-PUBLIC-NOT: spiWrappedSimple
+
+  @_spi(S) @WrapperWithInitialValue public var spiWrappedDefault: SomeClass
+  // CHECK-PRIVATE: @_spi(S) @{{.*}}.WrapperWithInitialValue @_projectedValueProperty($spiWrappedDefault) public var spiWrappedDefault: {{.*}}.SomeClass
+  // CHECK-PRIVATE: @_spi(S) public var $spiWrappedDefault: {{.*}}.Wrapper<{{.*}}.SomeClass>
+  // CHECK-PUBLIC-NOT: spiWrappedDefault
+}
+
 @_spi(LocalSPI) public protocol SPIProto3 {
 // CHECK-PRIVATE: @_spi(LocalSPI) public protocol SPIProto3
 // CHECK-PUBLIC-NOT: SPIProto3