When diagnosing that a defaulted function is ill-formed because it would be
implicitly deleted and overrides a non-deleted function, explain why the
function is deleted. For PR30844.
llvm-svn: 285610
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 518a780..2c74367 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -13850,7 +13850,7 @@
// See if we're deleting a function which is already known to override a
// non-deleted virtual function.
- if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Fn)) {
+ if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Fn)) {
bool IssuedDiagnostic = false;
for (CXXMethodDecl::method_iterator I = MD->begin_overridden_methods(),
E = MD->end_overridden_methods();
@@ -13863,6 +13863,11 @@
Diag((*I)->getLocation(), diag::note_overridden_virtual_function);
}
}
+ // If this function was implicitly deleted because it was defaulted,
+ // explain why it was deleted.
+ if (IssuedDiagnostic && MD->isDefaulted())
+ ShouldDeleteSpecialMember(MD, getSpecialMember(MD), nullptr,
+ /*Diagnose*/true);
}
// C++11 [basic.start.main]p3: