Merge pull request swiftlang#81249 from DougGregor/observation-nonisolated-conformances

[Observation] Create nonisolated conformances to Observable

Author: DougGregor

lib/Macros/Sources/ObservationMacros/ObservableMacro.swift

@@ -381,7 +381,7 @@ extension ObservableMacro: ExtensionMacro {
     }
 
     let decl: DeclSyntax = """
-        extension \(raw: type.trimmedDescription): \(raw: qualifiedConformanceName) {}
+        extension \(raw: type.trimmedDescription): nonisolated \(raw: qualifiedConformanceName) {}
         """
     let ext = decl.cast(ExtensionDeclSyntax.self)
 

lib/Sema/TypeCheckMacros.cpp

@@ -2152,8 +2152,8 @@ std::optional<unsigned> swift::expandExtensions(CustomAttr *attr,
     for (auto i : inheritedTypes.getIndices()) {
       auto constraint =
           TypeResolution::forInterface(
-              extension->getDeclContext(),
-              TypeResolverContext::GenericRequirement,
+              extension,
+              TypeResolverContext::Inherited,
               /*unboundTyOpener*/ nullptr,
               /*placeholderHandler*/ nullptr,
               /*packElementOpener*/ nullptr)

stdlib/public/Concurrency/CMakeLists.txt

@@ -205,6 +205,14 @@ set(LLVM_OPTIONAL_SOURCES
   DispatchGlobalExecutor.cpp
 )
 
+set(SWIFT_CONCURRENCY_DEPENDENCIES)
+if((SWIFT_BUILD_CLANG_OVERLAYS
+    OR SWIFT_BUILD_TEST_SUPPORT_MODULES)
+   AND (NOT DEFINED SWIFT_BUILD_CLANG_OVERLAYS_SKIP_BUILTIN_FLOAT
+        OR NOT SWIFT_BUILD_CLANG_OVERLAYS_SKIP_BUILTIN_FLOAT))
+  set(SWIFT_CONCURRENCY_DEPENDENCIES _Builtin_float)
+endif()
+
 add_swift_target_library(swift_Concurrency ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} IS_STDLIB
   ${SWIFT_RUNTIME_CONCURRENCY_C_SOURCES}
   ${SWIFT_RUNTIME_CONCURRENCY_EXECUTOR_SOURCES}
@@ -216,6 +224,7 @@ add_swift_target_library(swift_Concurrency ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} I
     TaskGroup+addTask.swift.gyb
     Task+startSynchronously.swift.gyb
 
+  SWIFT_MODULE_DEPENDS ${SWIFT_CONCURRENCY_DEPENDENCIES}
   SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_LINUX_STATIC Musl