Properly compute triviality for explicitly-defaulted or deleted special members.

Remove pre-standard restriction on explicitly-defaulted copy constructors with
'incorrect' parameter types, and instead just make those special members
non-trivial as the standard requires.

This required making CXXRecordDecl correctly handle classes which have both a
trivial and a non-trivial special member of the same kind.

This also fixes PR13217 by reimplementing DiagnoseNontrivial in terms of the
new triviality computation technology.

llvm-svn: 169667

1 files changed, 3 insertions, 10 deletions

diff --git a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
index 2355544ca84..337534eaac3 100644
--- a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -1581,10 +1581,10 @@ TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D,
   SemaRef.CheckOverrideControl(Method);
 
   // If a function is defined as defaulted or deleted, mark it as such now.
-  if (D->isDefaulted())
-    Method->setDefaulted();
+  if (D->isExplicitlyDefaulted())
+    SemaRef.SetDeclDefaulted(Method, Method->getLocation());
   if (D->isDeletedAsWritten())
-    Method->setDeletedAsWritten();
+    SemaRef.SetDeclDeleted(Method, Method->getLocation());
 
   // If there's a function template, let our caller handle it.
   if (FunctionTemplate) {
@@ -1610,13 +1610,6 @@ TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D,
     Owner->addDecl(Method);
   }
 
-  if (D->isExplicitlyDefaulted()) {
-    SemaRef.SetDeclDefaulted(Method, Method->getLocation());
-  } else {
-    assert(!D->isDefaulted() &&
-           "should not implicitly default uninstantiated function");
-  }
-
   return Method;
 }