bkelley updated this revision to Diff 92220.
bkelley added a comment.
Integrated feedback from @rjmccall
https://reviews.llvm.org/D31007
Files:
include/clang/AST/Type.h
lib/AST/Type.cpp
lib/Sema/SemaCast.cpp
lib/Sema/SemaDecl.cpp
lib/Sema/SemaDeclCXX.cpp
lib/Sema/SemaInit.cpp
test/SemaObjCXX/objc-weak.mm
Index: test/SemaObjCXX/objc-weak.mm
===================================================================
--- /dev/null
+++ test/SemaObjCXX/objc-weak.mm
@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 -fsyntax-only -fobjc-runtime-has-weak -fobjc-weak -fblocks -Wno-objc-root-class -std=c++98 -Wno-c++0x-extensions -verify %s
+
+@interface AnObject
+@property(weak) id value;
+@end
+
+__attribute__((objc_arc_weak_reference_unavailable))
+@interface NOWEAK : AnObject // expected-note 2 {{class is declared here}}
+@end
+
+struct S {
+ __weak id a; // expected-note {{because type 'S' has a member with __weak ownership}}
+};
+
+union U {
+ __weak id a; // expected-error {{ARC forbids Objective-C objects in union}}
+ S b; // expected-error {{union member 'b' has a non-trivial copy constructor}}
+};
+
+void testCast(AnObject *o) {
+ __weak id a = reinterpret_cast<__weak NOWEAK *>(o); // expected-error {{class is incompatible with __weak references}} \
+ // expected-error {{explicit ownership qualifier on cast result has no effect}} \
+ // expected-error {{assignment of a weak-unavailable object to a __weak object}}
+
+ __weak id b = static_cast<__weak NOWEAK *>(o); // expected-error {{class is incompatible with __weak references}} \
+ // expected-error {{explicit ownership qualifier on cast result has no effect}} \
+ // expected-error {{assignment of a weak-unavailable object to a __weak object}}
+}
Index: lib/Sema/SemaInit.cpp
===================================================================
--- lib/Sema/SemaInit.cpp
+++ lib/Sema/SemaInit.cpp
@@ -6678,8 +6678,7 @@
// need cleanups. Likewise if we're extending this temporary to automatic
// storage duration -- we need to register its cleanup during the
// full-expression's cleanups.
- if ((S.getLangOpts().ObjCAutoRefCount &&
- MTE->getType()->isObjCLifetimeType()) ||
+ if (MTE->getType()->isNonTrivialObjCLifetimeType() ||
(MTE->getStorageDuration() == SD_Automatic &&
MTE->getType().isDestructedType()))
S.Cleanup.setExprNeedsCleanups(true);
Index: lib/Sema/SemaDeclCXX.cpp
===================================================================
--- lib/Sema/SemaDeclCXX.cpp
+++ lib/Sema/SemaDeclCXX.cpp
@@ -7145,8 +7145,7 @@
// [...] nontrivally ownership-qualified types are [...] not trivially
// default constructible, copy constructible, move constructible, copy
// assignable, move assignable, or destructible [...]
- if (S.getLangOpts().ObjCAutoRefCount &&
- FieldType.hasNonTrivialObjCLifetime()) {
+ if (FieldType.hasNonTrivialObjCLifetime()) {
if (Diagnose)
S.Diag(FI->getLocation(), diag::note_nontrivial_objc_ownership)
<< RD << FieldType.getObjCLifetime();
Index: lib/Sema/SemaDecl.cpp
===================================================================
--- lib/Sema/SemaDecl.cpp
+++ lib/Sema/SemaDecl.cpp
@@ -14492,7 +14492,7 @@
// Verify that all the fields are okay.
SmallVector<FieldDecl*, 32> RecFields;
- bool ARCErrReported = false;
+ bool ObjCFieldLifetimeErrReported = false;
for (ArrayRef<Decl *>::iterator i = Fields.begin(), end = Fields.end();
i != end; ++i) {
FieldDecl *FD = cast<FieldDecl>(*i);
@@ -14627,16 +14627,16 @@
<< FixItHint::CreateInsertion(FD->getLocation(), "*");
QualType T = Context.getObjCObjectPointerType(FD->getType());
FD->setType(T);
- } else if (getLangOpts().ObjCAutoRefCount && Record && !ARCErrReported &&
+ } else if (getLangOpts().allowsNonTrivialObjCLifetimeQualifiers() &&
+ Record && !ObjCFieldLifetimeErrReported &&
(!getLangOpts().CPlusPlus || Record->isUnion())) {
- // It's an error in ARC if a field has lifetime.
+ // It's an error in ARC or Weak if a field has lifetime.
// We don't want to report this in a system header, though,
// so we just make the field unavailable.
// FIXME: that's really not sufficient; we need to make the type
// itself invalid to, say, initialize or copy.
QualType T = FD->getType();
- Qualifiers::ObjCLifetime lifetime = T.getObjCLifetime();
- if (lifetime && lifetime != Qualifiers::OCL_ExplicitNone) {
+ if (T.hasNonTrivialObjCLifetime()) {
SourceLocation loc = FD->getLocation();
if (getSourceManager().isInSystemHeader(loc)) {
if (!FD->hasAttr<UnavailableAttr>()) {
@@ -14647,7 +14647,7 @@
Diag(FD->getLocation(), diag::err_arc_objc_object_in_tag)
<< T->isBlockPointerType() << Record->getTagKind();
}
- ARCErrReported = true;
+ ObjCFieldLifetimeErrReported = true;
}
} else if (getLangOpts().ObjC1 &&
getLangOpts().getGC() != LangOptions::NonGC &&
Index: lib/Sema/SemaCast.cpp
===================================================================
--- lib/Sema/SemaCast.cpp
+++ lib/Sema/SemaCast.cpp
@@ -871,7 +871,7 @@
}
SrcExpr = ExprError();
} else if (tcr == TC_Success) {
- if (Self.getLangOpts().ObjCAutoRefCount)
+ if (Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers())
checkObjCConversion(Sema::CCK_OtherCast);
DiagnoseReinterpretUpDownCast(Self, SrcExpr.get(), DestType, OpRange);
}
@@ -935,7 +935,7 @@
} else if (tcr == TC_Success) {
if (Kind == CK_BitCast)
checkCastAlign();
- if (Self.getLangOpts().ObjCAutoRefCount)
+ if (Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers())
checkObjCConversion(Sema::CCK_OtherCast);
} else if (Kind == CK_BitCast) {
checkCastAlign();
Index: lib/AST/Type.cpp
===================================================================
--- lib/AST/Type.cpp
+++ lib/AST/Type.cpp
@@ -3768,6 +3768,12 @@
return type->isObjCRetainableType();
}
+/// Returns true if objects of this type are qualified with non-trivial
+/// lifetime semantics.
+bool Type::isNonTrivialObjCLifetimeType() const {
+ return CanonicalType.hasNonTrivialObjCLifetime();
+}
+
/// \brief Determine whether the given type T is a "bridgable" Objective-C type,
/// which is either an Objective-C object pointer type or an
bool Type::isObjCARCBridgableType() const {
Index: include/clang/AST/Type.h
===================================================================
--- include/clang/AST/Type.h
+++ include/clang/AST/Type.h
@@ -1694,6 +1694,7 @@
bool isObjCObjectPointerType() const; // pointer to ObjC object
bool isObjCRetainableType() const; // ObjC object or block pointer
bool isObjCLifetimeType() const; // (array of)* retainable type
+ bool isNonTrivialObjCLifetimeType() const;
bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type
bool isObjCNSObjectType() const; // __attribute__((NSObject))
bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class))
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