Author: rsmith
Date: Mon Aug 15 19:13:47 2016
New Revision: 278763
URL: http://llvm.org/viewvc/llvm-project?rev=278763&view=rev
Log:
PR28978: If we need overload resolution for the move constructor of an
anonymous union member of a class, we need overload resolution for the move
constructor of the class itself too; we can't rely on Sema to do the right
thing for us for anonymous union types.
Modified:
cfe/trunk/lib/AST/DeclCXX.cpp
cfe/trunk/test/CXX/special/class.copy/p11.0x.move.cpp
Modified: cfe/trunk/lib/AST/DeclCXX.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/DeclCXX.cpp?rev=278763&r1=278762&r2=278763&view=diff
==============================================================================
--- cfe/trunk/lib/AST/DeclCXX.cpp (original)
+++ cfe/trunk/lib/AST/DeclCXX.cpp Mon Aug 15 19:13:47 2016
@@ -807,6 +807,17 @@ void CXXRecordDecl::addedMember(Decl *D)
data().DefaultedDestructorIsDeleted = true;
}
+ // For an anonymous union member, our overload resolution will perform
+ // overload resolution for its members.
+ if (Field->isAnonymousStructOrUnion()) {
+ data().NeedOverloadResolutionForMoveConstructor |=
+ FieldRec->data().NeedOverloadResolutionForMoveConstructor;
+ data().NeedOverloadResolutionForMoveAssignment |=
+ FieldRec->data().NeedOverloadResolutionForMoveAssignment;
+ data().NeedOverloadResolutionForDestructor |=
+ FieldRec->data().NeedOverloadResolutionForDestructor;
+ }
+
// C++0x [class.ctor]p5:
// A default constructor is trivial [...] if:
// -- for all the non-static data members of its class that are of
Modified: cfe/trunk/test/CXX/special/class.copy/p11.0x.move.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/special/class.copy/p11.0x.move.cpp?rev=278763&r1=278762&r2=278763&view=diff
==============================================================================
--- cfe/trunk/test/CXX/special/class.copy/p11.0x.move.cpp (original)
+++ cfe/trunk/test/CXX/special/class.copy/p11.0x.move.cpp Mon Aug 15 19:13:47
2016
@@ -4,6 +4,9 @@ struct Trivial {};
struct NonTrivial {
NonTrivial(NonTrivial&&); // expected-note{{copy constructor is implicitly
deleted}}
};
+struct DeletedCopy {
+ DeletedCopy(const DeletedCopy&) = delete;
+};
// A defaulted move constructor for a class X is defined as deleted if X has:
@@ -22,6 +25,15 @@ struct DeletedNTVariant2 {
};
DeletedNTVariant2::DeletedNTVariant2(DeletedNTVariant2&&) = default; //
expected-error{{would delete}}
+// Note, move constructor is not a candidate because it is deleted.
+template<typename T> struct DeletedNTVariant3 { // expected-note 2{{default}}
expected-note 2{{copy}}
+ union {
+ T NT;
+ };
+};
+extern DeletedNTVariant3<NonTrivial> dntv3a(0); // expected-error {{no
matching}}
+extern DeletedNTVariant3<DeletedCopy> dntv3a(0); // expected-error {{no
matching}}
+
// -- a non-static data member of class type M (or array thereof) that cannot
be
// copied because overload resolution results in an ambiguity or a function
// that is deleted or inaccessible
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