Author: Volodymyr Sapsai Date: 2020-04-03T16:29:02-07:00 New Revision: a8c8b627f23f204fb621bd2a8c495cfc8bc16ae7
URL: https://github.com/llvm/llvm-project/commit/a8c8b627f23f204fb621bd2a8c495cfc8bc16ae7 DIFF: https://github.com/llvm/llvm-project/commit/a8c8b627f23f204fb621bd2a8c495cfc8bc16ae7.diff LOG: [ObjC generics] Fix not inheriting type bounds in categories/extensions. When a category/extension doesn't repeat a type bound, corresponding type parameter is substituted with `id` when used as a type argument. As a result, in the added test case it was causing errors like > type argument 'T' (aka 'id') does not satisfy the bound ('id<NSCopying>') of > type parameter 'T' We are already checking that type parameters should be consistent everywhere (see `checkTypeParamListConsistency`) and update `ObjCTypeParamDecl` to have correct underlying type. And when we use the type parameter as a method return type or a method parameter type, it is substituted to the bounded type. But when we use the type parameter as a type argument, we check `ObjCTypeParamType` that wasn't updated and remains `id`. Fix by updating not only `ObjCTypeParamDecl` UnderlyingType but also TypeForDecl as we use the underlying type to create a canonical type for `ObjCTypeParamType` (see `ASTContext::getObjCTypeParamType`). This is a different approach to fixing the issue. The previous one was 02c2ab3d8872416589bd1a6ca3dfb96ba373a3b9 which was reverted in 4c539e8da1b3de38a53ef3f7497f5c45a3243b61. The problem with the previous approach was that `ObjCTypeParamType::desugar` was returning underlying type for `ObjCTypeParamDecl` without applying any protocols stored in `ObjCTypeParamType`. It caused inconsistencies in comparing types before and after desugaring. rdar://problem/54329242 Reviewed By: erik.pilkington Differential Revision: https://reviews.llvm.org/D72872 Added: Modified: clang/include/clang/AST/ASTContext.h clang/lib/AST/ASTContext.cpp clang/lib/AST/Type.cpp clang/lib/Sema/SemaDeclObjC.cpp clang/test/SemaObjC/parameterized_classes_collection_literal.m clang/test/SemaObjC/parameterized_classes_subst.m Removed: ################################################################################ diff --git a/clang/include/clang/AST/ASTContext.h b/clang/include/clang/AST/ASTContext.h index 6813ab58874e..6360f18217c7 100644 --- a/clang/include/clang/AST/ASTContext.h +++ b/clang/include/clang/AST/ASTContext.h @@ -1442,6 +1442,8 @@ class ASTContext : public RefCountedBase<ASTContext> { QualType getObjCTypeParamType(const ObjCTypeParamDecl *Decl, ArrayRef<ObjCProtocolDecl *> protocols) const; + void adjustObjCTypeParamBoundType(const ObjCTypeParamDecl *Orig, + ObjCTypeParamDecl *New) const; bool ObjCObjectAdoptsQTypeProtocols(QualType QT, ObjCInterfaceDecl *Decl); diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp index 1e81e0a67b4d..06dcb6fa0580 100644 --- a/clang/lib/AST/ASTContext.cpp +++ b/clang/lib/AST/ASTContext.cpp @@ -4874,6 +4874,17 @@ ASTContext::getObjCTypeParamType(const ObjCTypeParamDecl *Decl, return QualType(newType, 0); } +void ASTContext::adjustObjCTypeParamBoundType(const ObjCTypeParamDecl *Orig, + ObjCTypeParamDecl *New) const { + New->setTypeSourceInfo(getTrivialTypeSourceInfo(Orig->getUnderlyingType())); + // Update TypeForDecl after updating TypeSourceInfo. + auto NewTypeParamTy = cast<ObjCTypeParamType>(New->getTypeForDecl()); + SmallVector<ObjCProtocolDecl *, 8> protocols; + protocols.append(NewTypeParamTy->qual_begin(), NewTypeParamTy->qual_end()); + QualType UpdatedTy = getObjCTypeParamType(New, protocols); + New->setTypeForDecl(UpdatedTy.getTypePtr()); +} + /// ObjCObjectAdoptsQTypeProtocols - Checks that protocols in IC's /// protocol list adopt all protocols in QT's qualified-id protocol /// list. diff --git a/clang/lib/AST/Type.cpp b/clang/lib/AST/Type.cpp index 3428437c3146..7c65378261ad 100644 --- a/clang/lib/AST/Type.cpp +++ b/clang/lib/AST/Type.cpp @@ -3534,6 +3534,7 @@ void ObjCTypeParamType::Profile(llvm::FoldingSetNodeID &ID, const ObjCTypeParamDecl *OTPDecl, ArrayRef<ObjCProtocolDecl *> protocols) { ID.AddPointer(OTPDecl); + ID.AddPointer(OTPDecl->getUnderlyingType().getAsOpaquePtr()); ID.AddInteger(protocols.size()); for (auto proto : protocols) ID.AddPointer(proto); diff --git a/clang/lib/Sema/SemaDeclObjC.cpp b/clang/lib/Sema/SemaDeclObjC.cpp index 934e1a23141c..6db57898e378 100644 --- a/clang/lib/Sema/SemaDeclObjC.cpp +++ b/clang/lib/Sema/SemaDeclObjC.cpp @@ -938,8 +938,7 @@ static bool checkTypeParamListConsistency(Sema &S, // Override the new type parameter's bound type with the previous type, // so that it's consistent. - newTypeParam->setTypeSourceInfo( - S.Context.getTrivialTypeSourceInfo(prevTypeParam->getUnderlyingType())); + S.Context.adjustObjCTypeParamBoundType(prevTypeParam, newTypeParam); continue; } @@ -966,8 +965,7 @@ static bool checkTypeParamListConsistency(Sema &S, } // Update the new type parameter's bound to match the previous one. - newTypeParam->setTypeSourceInfo( - S.Context.getTrivialTypeSourceInfo(prevTypeParam->getUnderlyingType())); + S.Context.adjustObjCTypeParamBoundType(prevTypeParam, newTypeParam); } return false; diff --git a/clang/test/SemaObjC/parameterized_classes_collection_literal.m b/clang/test/SemaObjC/parameterized_classes_collection_literal.m index 472746e09db9..034d2e8da217 100644 --- a/clang/test/SemaObjC/parameterized_classes_collection_literal.m +++ b/clang/test/SemaObjC/parameterized_classes_collection_literal.m @@ -29,7 +29,9 @@ + (instancetype)arrayWithObjects:(const T [])objects count:(NSUInteger)cnt; @end @interface NSDictionary<K, V> : NSObject <NSCopying> -+ (instancetype)dictionaryWithObjects:(const V [])objects forKeys:(const K [])keys count:(NSUInteger)cnt; ++ (instancetype)dictionaryWithObjects:(const V [])objects + forKeys:(const K <NSCopying> [])keys + count:(NSUInteger)cnt; @end void testArrayLiteral(void) { @@ -50,3 +52,9 @@ void testDictionaryLiteral(void) { @"world" : @"blah" // expected-warning{{object of type 'NSString *' is not compatible with dictionary value type 'NSNumber *'}} }; } + +void testCastingInDictionaryLiteral(NSString *arg) { + NSDictionary *dict = @{ + (id)arg : @"foo", + }; +} diff --git a/clang/test/SemaObjC/parameterized_classes_subst.m b/clang/test/SemaObjC/parameterized_classes_subst.m index d14a6e9deb40..b6d884760d29 100644 --- a/clang/test/SemaObjC/parameterized_classes_subst.m +++ b/clang/test/SemaObjC/parameterized_classes_subst.m @@ -467,3 +467,17 @@ - (void)mapUsingBlock:(id (^)(id))block { - (void)mapUsingBlock2:(id)block { // expected-warning{{conflicting parameter types in implementation}} } @end + +// -------------------------------------------------------------------------- +// Use a type parameter as a type argument. +// -------------------------------------------------------------------------- +// Type bounds in a category/extension are omitted. rdar://problem/54329242 +@interface ParameterizedContainer<T : id<NSCopying>> +- (ParameterizedContainer<T> *)inInterface; +@end +@interface ParameterizedContainer<T> (Cat) +- (ParameterizedContainer<T> *)inCategory; +@end +@interface ParameterizedContainer<U> () +- (ParameterizedContainer<U> *)inExtension; +@end _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
