NCGenerics: add test for feature flag & force-enable all

lib/Basic/LangOptions.cpp

@@ -47,6 +47,9 @@ LangOptions::LangOptions() {
 #endif
 
   // Note: Introduce default-on language options here.
+  Features.insert(Feature::NoncopyableGenerics);
+  Features.insert(Feature::BorrowingSwitch);
+  Features.insert(Feature::MoveOnlyPartialConsumption);
 
   // Enable any playground options that are enabled by default.
 #define PLAYGROUND_OPTION(OptionName, Description, DefaultOn, HighPerfOn) \

lib/ClangImporter/ClangImporter.cpp

@@ -5795,6 +5795,20 @@ cloneBaseMemberDecl(ValueDecl *decl, DeclContext *newContext) {
   }
 
   if (auto var = dyn_cast<VarDecl>(decl)) {
+    auto oldContext = var->getDeclContext();
+    auto oldTypeDecl = oldContext->getSelfNominalTypeDecl();
+    // If the base type is non-copyable, we cannot synthesize the accessor,
+    // because its implementation would use `UnsafePointer<BaseTy>`, and that
+    // triggers a bug when building SwiftCompilerSources. (rdar://128013193)
+    //
+    // We cannot use `ty->isNoncopyable()` here because that would create a
+    // cyclic dependency between ModuleQualifiedLookupRequest and
+    // LookupConformanceInModuleRequest, so we check for the presence of
+    // move-only attribute that is implicitly added to non-copyable C++ types by
+    // ClangImporter.
+    if (oldTypeDecl->getAttrs().hasAttribute<MoveOnlyAttr>())
+      return nullptr;
+
     auto rawMemory = allocateMemoryForDecl<VarDecl>(var->getASTContext(),
                                                     sizeof(VarDecl), false);
     auto out =

lib/ClangImporter/ImportType.cpp

@@ -509,6 +509,26 @@ namespace {
         return importFunctionPointerLikeType(*type, pointeeType);
       }
 
+      // We cannot specify UnsafePointer<T> with a non-copyable type T just yet,
+      // because it triggers a bug when building SwiftCompilerSources.
+      // (rdar://128013193)
+      //
+      // We cannot use `ty->isNoncopyable()` here because that would create a
+      // cyclic dependency between ModuleQualifiedLookupRequest and
+      // LookupConformanceInModuleRequest, so we check for the presence of
+      // move-only attribute that is implicitly added to non-copyable C++ types
+      // by ClangImporter.
+      if (pointeeType && pointeeType->getAnyNominal() &&
+          pointeeType->getAnyNominal()
+              ->getAttrs()
+              .hasAttribute<MoveOnlyAttr>()) {
+        auto opaquePointerDecl = Impl.SwiftContext.getOpaquePointerDecl();
+        if (!opaquePointerDecl)
+          return Type();
+        return {opaquePointerDecl->getDeclaredInterfaceType(),
+                ImportHint::OtherPointer};
+      }
+
       PointerTypeKind pointerKind;
       if (quals.hasConst()) {
         pointerKind = PTK_UnsafePointer;

test/Interop/Cxx/class/move-only/inherited-field-access-irgen.swift

@@ -1,6 +1,8 @@
 // RUN: %target-swift-emit-irgen -I %S/Inputs -cxx-interoperability-mode=swift-6 %s -validate-tbd-against-ir=none -Xcc -fignore-exceptions | %FileCheck %s
 // RUN: %target-swift-emit-irgen -I %S/Inputs -cxx-interoperability-mode=upcoming-swift %s -validate-tbd-against-ir=none -Xcc -fignore-exceptions | %FileCheck %s
 
+// REQUIRES: rdar128013193
+
 import MoveOnlyCxxValueType
 
 func testGetX() -> CInt {

test/Interop/Cxx/class/move-only/inherited-field-access-silgen.swift

@@ -1,6 +1,8 @@
 // RUN: %target-swift-emit-sil -I %S/Inputs -cxx-interoperability-mode=swift-6 %s -validate-tbd-against-ir=none | %FileCheck %s
 // RUN: %target-swift-emit-sil -I %S/Inputs -cxx-interoperability-mode=upcoming-swift %s -validate-tbd-against-ir=none | %FileCheck %s
 
+// REQUIRES: rdar128013193
+
 import MoveOnlyCxxValueType
 
 func testGetX() -> CInt {

test/Interop/Cxx/class/move-only/move-only-cxx-value-type-module-interface.swift

@@ -1,4 +1,8 @@
-// RUN: %target-swift-ide-test -print-module -module-to-print=MoveOnlyCxxValueType -I %S/Inputs -cxx-interoperability-mode=upcoming-swift -source-filename=x | %FileCheck %s --check-prefix=CHECK-NCG
+// RUN: %target-swift-ide-test -print-module -module-to-print=MoveOnlyCxxValueType -I %S/Inputs -cxx-interoperability-mode=upcoming-swift -source-filename=x | %FileCheck %s --check-prefix=CHECK
 
-// CHECK-NCG: func getNonCopyablePtr() -> UnsafeMutablePointer<NonCopyable>
-// CHECK-NCG: func getNonCopyableDerivedPtr() -> UnsafeMutablePointer<NonCopyableDerived>
+// CHECK: func getNonCopyablePtr() -> OpaquePointer
+// CHECK: func getNonCopyableDerivedPtr() -> OpaquePointer
+
+// FIXME: would prefer to have this (rdar://128013193)
+// func getNonCopyablePtr() -> UnsafeMutablePointer<NonCopyable>
+// func getNonCopyableDerivedPtr() -> UnsafeMutablePointer<NonCopyableDerived>

test/Interop/Cxx/class/move-only/move-only-cxx-value-type.swift

@@ -1,4 +1,5 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=upcoming-swift)
+// -- FIXME: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=upcoming-swift -D HAS_RDAR_128013193)
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=swift-5.9 -O)
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=swift-6 -O)
 
@@ -27,10 +28,12 @@ MoveOnlyCxxValueType.test("Test derived move only type member access") {
   var k = c.method(-3)
   expectEqual(k, -6)
   expectEqual(c.method(1), 2)
+#if HAS_RDAR_128013193
   k = c.x
   expectEqual(k, 2)
   c.x = 11
   expectEqual(c.x, 11)
+#endif
   k = c.mutMethod(-13)
   expectEqual(k, -13)
 }
@@ -56,6 +59,7 @@ MoveOnlyCxxValueType.test("Test move only field access in holder") {
   expectEqual(c.x.x, 5)
 }
 
+#if HAS_RDAR_128013193
 MoveOnlyCxxValueType.test("Test move only field access in derived holder") {
   var c = NonCopyableHolderDerivedDerived(-11)
   var k = borrowNC(c.x)
@@ -69,5 +73,6 @@ MoveOnlyCxxValueType.test("Test move only field access in derived holder") {
   c.x.mutMethod(5)
   expectEqual(c.x.x, 5)
 }
+#endif
 
 runAllTests()

test/Interop/Cxx/operators/move-only/move-only-synthesized-properties.swift

@@ -1,9 +1,11 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=swift-5.9)
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=upcoming-swift)
+// -- FIXME: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=upcoming-swift -D HAS_RDAR_128013193)
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=swift-5.9 -O)
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=swift-6 -O)
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=upcoming-swift -O)
+// -- FIXME: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=upcoming-swift -O -D HAS_RDAR_128013193)
 //
 // REQUIRES: executable_test
 
@@ -90,6 +92,7 @@ MoveOnlyCxxOperators.test("testNonCopyableHolderValueMutDeref pointee value") {
   expectEqual(k.x, k2.x)
 }
 
+#if HAS_RDAR_128013193
 MoveOnlyCxxOperators.test("NonCopyableHolderConstDerefDerivedDerived pointee borrow") {
   let holder = NonCopyableHolderConstDerefDerivedDerived(11)
   var k = borrowNC(holder.pointee)
@@ -157,5 +160,6 @@ MoveOnlyCxxOperators.test("testNonCopyableHolderValueMutDerefDerivedDerived poin
   var k2 = holder.pointee
   expectEqual(k.x, k2.x)
 }
+#endif
 
 runAllTests()

test/ModuleInterface/noncopyable_generics_feature_flag.swift

@@ -0,0 +1,20 @@
+// RUN: %empty-directory(%t)
+// RUN: split-file %s %t
+
+// RUN: %target-swift-emit-module-interface(%t/Library.swiftinterface) %t/Library.swift -module-name Library
+// RUN: rm -f %t/Library.swiftmodule
+// RUN: %target-swift-frontend -I %t -typecheck -verify %t/test.swift
+
+
+//--- Library.swift
+
+public struct Hello<T: ~Copyable> {
+  public init() {}
+}
+
+//--- test.swift
+import Library
+
+struct NC: ~Copyable {}
+
+let x: Hello<NC> = .init()

test/Sema/moveonly_enum.swift

@@ -22,7 +22,7 @@ enum Foo3 {
 }
 
 func test_switch(x: consuming Foo3) {
-    switch x { // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{12-12=consume }}
+    switch x { 
     default:
         break
     }
@@ -32,7 +32,7 @@ func test_switch(x: consuming Foo3) {
         break
     }
 
-    switch (x) { // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{13-13=consume }}
+    switch (x) { 
     default:
         break
     }
@@ -43,7 +43,7 @@ func test_switch(x: consuming Foo3) {
     }
 
     let _: () -> () = {
-        switch x { // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{16-16=consume }}
+        switch x { 
         default:
             break
         }
@@ -57,7 +57,7 @@ func test_switch(x: consuming Foo3) {
     }
 
     let _: () -> () = {
-        switch (x) { // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{17-17=consume }}
+        switch (x) { 
         default:
             break
         }
@@ -72,19 +72,19 @@ func test_switch(x: consuming Foo3) {
 }
 
 func test_if_case(x: consuming Foo3) {
-    if case .bar(let y) = x { _ = y } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{27-27=consume }}
+    if case .bar(let y) = x { _ = y } 
 
-    guard case .bar(let y) = x else { return } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{30-30=consume }}
+    guard case .bar(let y) = x else { return } 
     _ = y
 
     if case .bar(let z) = consume x { _ = z }
 
     guard case .bar(let z) = consume x else { return }
     _ = z
 
-    if case .bar(let a) = (x) { _ = a } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{28-28=consume }}
+    if case .bar(let a) = (x) { _ = a } 
 
-    guard case .bar(let a) = (x) else { return } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{31-31=consume }}
+    guard case .bar(let a) = (x) else { return } 
     _ = a
 
     if case .bar(let b) = (consume x) { _ = b }
@@ -93,11 +93,11 @@ func test_if_case(x: consuming Foo3) {
     _ = b
 
     let _: () -> () = {
-        if case .bar(let y) = x { _ = y } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{31-31=consume }}
+        if case .bar(let y) = x { _ = y } 
     }
 
     let _: () -> () = {
-        guard case .bar(let y) = x else { return } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{34-34=consume }}
+        guard case .bar(let y) = x else { return } 
         _ = y
     }
 
@@ -111,11 +111,11 @@ func test_if_case(x: consuming Foo3) {
     }
 
     let _: () -> () = {
-        if case .bar(let a) = (x) { _ = a } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{32-32=consume }}
+        if case .bar(let a) = (x) { _ = a } 
     }
 
     let _: () -> () = {
-        guard case .bar(let a) = (x) else { return } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{35-35=consume }}
+        guard case .bar(let a) = (x) else { return } 
         _ = a
     }
 
@@ -130,7 +130,7 @@ func test_if_case(x: consuming Foo3) {
 }
 
 func test_switch_b(x: __owned Foo3) {
-    switch x { // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{12-12=consume }}
+    switch x { 
     default:
         break
     }
@@ -140,7 +140,7 @@ func test_switch_b(x: __owned Foo3) {
         break
     }
 
-    switch (x) { // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{13-13=consume }}
+    switch (x) { 
     default:
         break
     }
@@ -151,7 +151,7 @@ func test_switch_b(x: __owned Foo3) {
     }
 
     let _: () -> () = {
-        switch x { // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{16-16=consume }}
+        switch x { 
         default:
             break
         }
@@ -165,7 +165,7 @@ func test_switch_b(x: __owned Foo3) {
     }
 
     let _: () -> () = {
-        switch (x) { // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{17-17=consume }}
+        switch (x) { 
         default:
             break
         }
@@ -180,19 +180,19 @@ func test_switch_b(x: __owned Foo3) {
 }
 
 func test_if_case_b(x: __owned Foo3) {
-    if case .bar(let y) = x { _ = y } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{27-27=consume }}
+    if case .bar(let y) = x { _ = y } 
 
-    guard case .bar(let y) = x else { return } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{30-30=consume }}
+    guard case .bar(let y) = x else { return } 
     _ = y
 
     if case .bar(let z) = consume x { _ = z }
 
     guard case .bar(let z) = consume x else { return }
     _ = z
 
-    if case .bar(let a) = (x) { _ = a } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{28-28=consume }}
+    if case .bar(let a) = (x) { _ = a } 
 
-    guard case .bar(let a) = (x) else { return } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{31-31=consume }}
+    guard case .bar(let a) = (x) else { return } 
     _ = a
 
     if case .bar(let b) = (consume x) { _ = b }
@@ -201,11 +201,11 @@ func test_if_case_b(x: __owned Foo3) {
     _ = b
 
     let _: () -> () = {
-        if case .bar(let y) = x { _ = y } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{31-31=consume }}
+        if case .bar(let y) = x { _ = y } 
     }
 
     let _: () -> () = {
-        guard case .bar(let y) = x else { return } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{34-34=consume }}
+        guard case .bar(let y) = x else { return } 
         _ = y
     }
 
@@ -219,11 +219,11 @@ func test_if_case_b(x: __owned Foo3) {
     }
 
     let _: () -> () = {
-        if case .bar(let a) = (x) { _ = a } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{32-32=consume }}
+        if case .bar(let a) = (x) { _ = a } 
     }
 
     let _: () -> () = {
-        guard case .bar(let a) = (x) else { return } // expected-error{{noncopyable binding being pattern-matched must have the 'consume' operator applied}} {{35-35=consume }}
+        guard case .bar(let a) = (x) else { return } 
         _ = a
     }