From 1e23865d0e148a3951a9b418e57b7e0762dc3098 Mon Sep 17 00:00:00 2001
From: Sean Hunt <scshunt@csclub.uwaterloo.ca>
Date: Thu, 12 May 2011 03:51:51 +0000
Subject: [PATCH] Make it so that we actually generate definitions for
 explicitly defaulted default constructors.

As it happens, making sure that we handle out-of-line defaulted
functions properly will involved making sure that we actually parse them
correctly, so that's coming after.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131224 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaDeclCXX.cpp | 3 ++-
 lib/Sema/SemaExpr.cpp    | 4 ++--
 lib/Sema/SemaInit.cpp    | 2 +-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index 8ef3463f42..13e2819f7b 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -5263,6 +5263,7 @@ CXXConstructorDecl *Sema::DeclareImplicitDefaultConstructor(
                                  /*isInline=*/true,
                                  /*isImplicitlyDeclared=*/true);
   DefaultCon->setAccess(AS_public);
+  DefaultCon->setDefaulted();
   DefaultCon->setImplicit();
   DefaultCon->setTrivial(ClassDecl->hasTrivialDefaultConstructor());
   
@@ -5283,7 +5284,7 @@ CXXConstructorDecl *Sema::DeclareImplicitDefaultConstructor(
 
 void Sema::DefineImplicitDefaultConstructor(SourceLocation CurrentLocation,
                                             CXXConstructorDecl *Constructor) {
-  assert((Constructor->isImplicit() && Constructor->isDefaultConstructor() &&
+  assert((Constructor->isDefaulted() && Constructor->isDefaultConstructor() &&
           !Constructor->isUsed(false) && !Constructor->isDeleted()) &&
     "DefineImplicitDefaultConstructor - call it for implicit default ctor");
 
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 1597152b6c..e2426952b2 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -9853,8 +9853,8 @@ void Sema::MarkDeclarationReferenced(SourceLocation Loc, Decl *D) {
   // Note that this declaration has been used.
   if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
     unsigned TypeQuals;
-    if (Constructor->isImplicit() && Constructor->isDefaultConstructor()) {
-      if (Constructor->getParent()->hasTrivialDefaultConstructor())
+    if (Constructor->isDefaulted() && Constructor->isDefaultConstructor()) {
+      if (Constructor->isTrivial())
         return;
       if (!Constructor->isUsed(false))
         DefineImplicitDefaultConstructor(Loc, Constructor);
diff --git a/lib/Sema/SemaInit.cpp b/lib/Sema/SemaInit.cpp
index be3cd34f75..26d030419a 100644
--- a/lib/Sema/SemaInit.cpp
+++ b/lib/Sema/SemaInit.cpp
@@ -4019,7 +4019,7 @@ InitializationSequence::Perform(Sema &S,
         // the definition for completely trivial constructors.
         CXXRecordDecl *ClassDecl = Constructor->getParent();
         assert(ClassDecl && "No parent class for constructor.");
-        if (Constructor->isImplicit() && Constructor->isDefaultConstructor() &&
+        if (Constructor->isDefaulted() && Constructor->isDefaultConstructor() &&
             ClassDecl->hasTrivialDefaultConstructor() &&
             !Constructor->isUsed(false))
           S.DefineImplicitDefaultConstructor(Loc, Constructor);
-- 
2.40.0