PR13470: Ensure that copy-list-initialization isntantiates as

copy-list-initialization (and doesn't add an additional copy step):

Fill in the ListInitialization bit when creating a CXXConstructExpr. Use it
when instantiating initializers in order to correctly handle instantiation of
copy-list-initialization. Teach TreeTransform that function arguments are
initializations, and so need this special treatment too. Finally, remove some
hacks which were working around SubstInitializer's shortcomings.

llvm-svn: 170489

diff --git a/clang/include/clang/AST/ExprCXX.h b/clang/include/clang/AST/ExprCXX.h
index c737d5f..c8b4c0c 100644 (file)
--- a/clang/include/clang/AST/ExprCXX.h
+++ b/clang/include/clang/AST/ExprCXX.h
@@ -1092,7 +1092,8 @@ public:
                          ArrayRef<Expr *> Args,
                          SourceRange parenRange,
                          bool HadMultipleCandidates,
-                         bool ZeroInitialization = false);
+                         bool ListInitialization,
+                         bool ZeroInitialization);
   explicit CXXTemporaryObjectExpr(EmptyShell Empty)
     : CXXConstructExpr(CXXTemporaryObjectExprClass, Empty), Type() { }
 

diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index 047804a..ab66c9d 100644 (file)
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -3367,13 +3367,6 @@ public:
                               UnqualifiedId &Name,
                               TypeResult Type);
 
-  /// InitializeVarWithConstructor - Creates an CXXConstructExpr
-  /// and sets it as the initializer for the passed in VarDecl.
-  bool InitializeVarWithConstructor(VarDecl *VD,
-                                    CXXConstructorDecl *Constructor,
-                                    MultiExprArg Exprs,
-                                    bool HadMultipleCandidates);
-
   /// BuildCXXConstructExpr - Creates a complete call to a constructor,
   /// including handling of its default argument expressions.
   ///
@@ -3381,8 +3374,9 @@ public:
   ExprResult
   BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
                         CXXConstructorDecl *Constructor, MultiExprArg Exprs,
-                        bool HadMultipleCandidates, bool RequiresZeroInit,
-                        unsigned ConstructKind, SourceRange ParenRange);
+                        bool HadMultipleCandidates, bool IsListInitialization,
+                        bool RequiresZeroInit, unsigned ConstructKind,
+                        SourceRange ParenRange);
 
   // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if
   // the constructor can be elidable?
@@ -3390,8 +3384,8 @@ public:
   BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
                         CXXConstructorDecl *Constructor, bool Elidable,
                         MultiExprArg Exprs, bool HadMultipleCandidates,
-                        bool RequiresZeroInit, unsigned ConstructKind,
-                        SourceRange ParenRange);
+                        bool IsListInitialization, bool RequiresZeroInit,
+                        unsigned ConstructKind, SourceRange ParenRange);
 
   /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating
   /// the default expr if needed.

diff --git a/clang/lib/AST/ExprCXX.cpp b/clang/lib/AST/ExprCXX.cpp
index 6c66c90..fcf34d9 100644 (file)
--- a/clang/lib/AST/ExprCXX.cpp
+++ b/clang/lib/AST/ExprCXX.cpp
@@ -717,12 +717,14 @@ CXXTemporaryObjectExpr::CXXTemporaryObjectExpr(ASTContext &C,
                                                ArrayRef<Expr*> Args,
                                                SourceRange parenRange,
                                                bool HadMultipleCandidates,
+                                               bool ListInitialization,
                                                bool ZeroInitialization)
   : CXXConstructExpr(C, CXXTemporaryObjectExprClass, 
                      Type->getType().getNonReferenceType(), 
                      Type->getTypeLoc().getBeginLoc(),
                      Cons, false, Args,
-                     HadMultipleCandidates, /*FIXME*/false, ZeroInitialization,
+                     HadMultipleCandidates,
+                     ListInitialization, ZeroInitialization,
                      CXXConstructExpr::CK_Complete, parenRange),
     Type(Type) {
 }

diff --git a/clang/lib/AST/StmtPrinter.cpp b/clang/lib/AST/StmtPrinter.cpp
index ec90674..ff9039e 100644 (file)
--- a/clang/lib/AST/StmtPrinter.cpp
+++ b/clang/lib/AST/StmtPrinter.cpp
@@ -1487,6 +1487,9 @@ void StmtPrinter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
 }
 
 void StmtPrinter::VisitCXXConstructExpr(CXXConstructExpr *E) {
+  if (E->isListInitialization())
+    OS << "{ ";
+
   for (unsigned i = 0, e = E->getNumArgs(); i != e; ++i) {
     if (isa<CXXDefaultArgExpr>(E->getArg(i))) {
       // Don't print any defaulted arguments
@@ -1496,6 +1499,9 @@ void StmtPrinter::VisitCXXConstructExpr(CXXConstructExpr *E) {
     if (i) OS << ", ";
     PrintExpr(E->getArg(i));
   }
+
+  if (E->isListInitialization())
+    OS << " }";
 }
 
 void StmtPrinter::VisitExprWithCleanups(ExprWithCleanups *E) {

diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 99366b6..8385e85 100644 (file)
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -1932,11 +1932,7 @@ Sema::ActOnCXXInClassMemberInitializer(Decl *D, SourceLocation InitLoc,
   }
 
   ExprResult Init = InitExpr;
-  if (!FD->getType()->isDependentType() && !InitExpr->isTypeDependent() &&
-      !FD->getDeclContext()->isDependentContext()) {
-    // Note: We don't type-check when we're in a dependent context, because
-    // the initialization-substitution code does not properly handle direct
-    // list initialization. We have the same hackaround for ctor-initializers.
+  if (!FD->getType()->isDependentType() && !InitExpr->isTypeDependent()) {
     if (isa<InitListExpr>(InitExpr) && isStdInitializerList(FD->getType(), 0)) {
       Diag(FD->getLocation(), diag::warn_dangling_std_initializer_list)
         << /*at end of ctor*/1 << InitExpr->getSourceRange();
@@ -2318,10 +2314,13 @@ Sema::BuildMemberInitializer(ValueDecl *Member, Expr *Init,
   if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
     Args = ParenList->getExprs();
     NumArgs = ParenList->getNumExprs();
-  } else {
-    InitListExpr *InitList = cast<InitListExpr>(Init);
+  } else if (InitListExpr *InitList = dyn_cast<InitListExpr>(Init)) {
     Args = InitList->getInits();
     NumArgs = InitList->getNumInits();
+  } else {
+    // Template instantiation doesn't reconstruct ParenListExprs for us.
+    Args = &Init;
+    NumArgs = 1;
   }
 
   if (getDiagnostics().getDiagnosticLevel(diag::warn_field_is_uninit, IdLoc)
@@ -2382,19 +2381,8 @@ Sema::BuildMemberInitializer(ValueDecl *Member, Expr *Init,
     if (MemberInit.isInvalid())
       return true;
 
-    // If we are in a dependent context, template instantiation will
-    // perform this type-checking again. Just save the arguments that we
-    // received.
-    // FIXME: This isn't quite ideal, since our ASTs don't capture all
-    // of the information that we have about the member
-    // initializer. However, deconstructing the ASTs is a dicey process,
-    // and this approach is far more likely to get the corner cases right.
-    if (CurContext->isDependentContext()) {
-      // The existing Init will do fine.
-    } else {
-      Init = MemberInit.get();
-      CheckForDanglingReferenceOrPointer(*this, Member, Init, IdLoc);
-    }
+    Init = MemberInit.get();
+    CheckForDanglingReferenceOrPointer(*this, Member, Init, IdLoc);
   }
 
   if (DirectMember) {
@@ -9515,6 +9503,7 @@ Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
                             CXXConstructorDecl *Constructor,
                             MultiExprArg ExprArgs,
                             bool HadMultipleCandidates,
+                            bool IsListInitialization,
                             bool RequiresZeroInit,
                             unsigned ConstructKind,
                             SourceRange ParenRange) {
@@ -9538,7 +9527,8 @@ Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
 
   return BuildCXXConstructExpr(ConstructLoc, DeclInitType, Constructor,
                                Elidable, ExprArgs, HadMultipleCandidates,
-                               RequiresZeroInit, ConstructKind, ParenRange);
+                               IsListInitialization, RequiresZeroInit,
+                               ConstructKind, ParenRange);
 }
 
 /// BuildCXXConstructExpr - Creates a complete call to a constructor,
@@ -9548,39 +9538,19 @@ Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
                             CXXConstructorDecl *Constructor, bool Elidable,
                             MultiExprArg ExprArgs,
                             bool HadMultipleCandidates,
+                            bool IsListInitialization,
                             bool RequiresZeroInit,
                             unsigned ConstructKind,
                             SourceRange ParenRange) {
   MarkFunctionReferenced(ConstructLoc, Constructor);
   return Owned(CXXConstructExpr::Create(Context, DeclInitType, ConstructLoc,
                                         Constructor, Elidable, ExprArgs,
-                                        HadMultipleCandidates, /*FIXME*/false,
-                                        RequiresZeroInit,
+                                        HadMultipleCandidates,
+                                        IsListInitialization, RequiresZeroInit,
               static_cast<CXXConstructExpr::ConstructionKind>(ConstructKind),
                                         ParenRange));
 }
 
-bool Sema::InitializeVarWithConstructor(VarDecl *VD,
-                                        CXXConstructorDecl *Constructor,
-                                        MultiExprArg Exprs,
-                                        bool HadMultipleCandidates) {
-  // FIXME: Provide the correct paren SourceRange when available.
-  ExprResult TempResult =
-    BuildCXXConstructExpr(VD->getLocation(), VD->getType(), Constructor,
-                          Exprs, HadMultipleCandidates, false,
-                          CXXConstructExpr::CK_Complete, SourceRange());
-  if (TempResult.isInvalid())
-    return true;
-
-  Expr *Temp = TempResult.takeAs<Expr>();
-  CheckImplicitConversions(Temp, VD->getLocation());
-  MarkFunctionReferenced(VD->getLocation(), Constructor);
-  Temp = MaybeCreateExprWithCleanups(Temp);
-  VD->setInit(Temp);
-
-  return false;
-}
-
 void Sema::FinalizeVarWithDestructor(VarDecl *VD, const RecordType *Record) {
   if (VD->isInvalidDecl()) return;
 

diff --git a/clang/lib/Sema/SemaExprCXX.cpp b/clang/lib/Sema/SemaExprCXX.cpp
index 4a93b11..629c9b2 100644 (file)
--- a/clang/lib/Sema/SemaExprCXX.cpp
+++ b/clang/lib/Sema/SemaExprCXX.cpp
@@ -2323,11 +2323,11 @@ static ExprResult BuildCXXCastArgument(Sema &S,
     S.CheckConstructorAccess(CastLoc, Constructor,
                              InitializedEntity::InitializeTemporary(Ty),
                              Constructor->getAccess());
-    
+
     ExprResult Result
       = S.BuildCXXConstructExpr(CastLoc, Ty, cast<CXXConstructorDecl>(Method),
-                                ConstructorArgs, 
-                                HadMultipleCandidates, /*ZeroInit*/ false, 
+                                ConstructorArgs, HadMultipleCandidates,
+                                /*ListInit*/ false, /*ZeroInit*/ false,
                                 CXXConstructExpr::CK_Complete, SourceRange());
     if (Result.isInvalid())
       return ExprError();
@@ -2479,14 +2479,14 @@ Sema::PerformImplicitConversion(Expr *From, QualType ToType,
                                    ToType, SCS.CopyConstructor,
                                    ConstructorArgs,
                                    /*HadMultipleCandidates*/ false,
-                                   /*ZeroInit*/ false,
+                                   /*ListInit*/ false, /*ZeroInit*/ false,
                                    CXXConstructExpr::CK_Complete,
                                    SourceRange());
     }
     return BuildCXXConstructExpr(/*FIXME:ConstructLoc*/SourceLocation(),
                                  ToType, SCS.CopyConstructor,
                                  From, /*HadMultipleCandidates*/ false,
-                                 /*ZeroInit*/ false,
+                                 /*ListInit*/ false, /*ZeroInit*/ false,
                                  CXXConstructExpr::CK_Complete,
                                  SourceRange());
   }

diff --git a/clang/lib/Sema/SemaInit.cpp b/clang/lib/Sema/SemaInit.cpp
index a5a0a11..a40bf9f 100644 (file)
--- a/clang/lib/Sema/SemaInit.cpp
+++ b/clang/lib/Sema/SemaInit.cpp
@@ -4563,6 +4563,7 @@ static ExprResult CopyObject(Sema &S,
   CurInit = S.BuildCXXConstructExpr(Loc, T, Constructor, Elidable,
                                     ConstructorArgs,
                                     HadMultipleCandidates,
+                                    /*ListInit*/ false,
                                     /*ZeroInit*/ false,
                                     CXXConstructExpr::CK_Complete,
                                     SourceRange());
@@ -4652,7 +4653,8 @@ PerformConstructorInitialization(Sema &S,
                                  const InitializationKind &Kind,
                                  MultiExprArg Args,
                                  const InitializationSequence::Step& Step,
-                                 bool &ConstructorInitRequiresZeroInit) {
+                                 bool &ConstructorInitRequiresZeroInit,
+                                 bool IsListInitialization) {
   unsigned NumArgs = Args.size();
   CXXConstructorDecl *Constructor
     = cast<CXXConstructorDecl>(Step.Function.Function);
@@ -4710,13 +4712,12 @@ PerformConstructorInitialization(Sema &S,
     if (Kind.getKind() != InitializationKind::IK_DirectList)
       ParenRange = Kind.getParenRange();
 
-    CurInit = S.Owned(new (S.Context) CXXTemporaryObjectExpr(S.Context,
-                                                             Constructor,
-                                                             TSInfo,
-                                                             ConstructorArgs,
-                                                             ParenRange,
-                                                     HadMultipleCandidates,
-                                         ConstructorInitRequiresZeroInit));
+    CurInit = S.Owned(
+      new (S.Context) CXXTemporaryObjectExpr(S.Context, Constructor,
+                                             TSInfo, ConstructorArgs,
+                                             ParenRange, IsListInitialization,
+                                             HadMultipleCandidates,
+                                             ConstructorInitRequiresZeroInit));
   } else {
     CXXConstructExpr::ConstructionKind ConstructKind =
       CXXConstructExpr::CK_Complete;
@@ -4741,6 +4742,7 @@ PerformConstructorInitialization(Sema &S,
                                         Constructor, /*Elidable=*/true,
                                         ConstructorArgs,
                                         HadMultipleCandidates,
+                                        IsListInitialization,
                                         ConstructorInitRequiresZeroInit,
                                         ConstructKind,
                                         parenRange);
@@ -4749,6 +4751,7 @@ PerformConstructorInitialization(Sema &S,
                                         Constructor,
                                         ConstructorArgs,
                                         HadMultipleCandidates,
+                                        IsListInitialization,
                                         ConstructorInitRequiresZeroInit,
                                         ConstructKind,
                                         parenRange);
@@ -5084,6 +5087,7 @@ InitializationSequence::Perform(Sema &S,
         CurInit = S.BuildCXXConstructExpr(Loc, Step->Type, Constructor,
                                           ConstructorArgs,
                                           HadMultipleCandidates,
+                                          /*ListInit*/ false,
                                           /*ZeroInit*/ false,
                                           CXXConstructExpr::CK_Complete,
                                           SourceRange());
@@ -5239,7 +5243,8 @@ InitializationSequence::Perform(Sema &S,
       CurInit = PerformConstructorInitialization(S, UseTemporary ? TempEntity :
                                                                    Entity,
                                                  Kind, Arg, *Step,
-                                               ConstructorInitRequiresZeroInit);
+                                               ConstructorInitRequiresZeroInit,
+                                               /*IsListInitialization*/ true);
       break;
     }
 
@@ -5272,7 +5277,8 @@ InitializationSequence::Perform(Sema &S,
       CurInit = PerformConstructorInitialization(S, UseTemporary ? TempEntity
                                                                  : Entity,
                                                  Kind, Args, *Step,
-                                               ConstructorInitRequiresZeroInit);
+                                               ConstructorInitRequiresZeroInit,
+                                               /*IsListInitialization*/ false);
       break;
     }
 

diff --git a/clang/lib/Sema/SemaTemplateInstantiate.cpp b/clang/lib/Sema/SemaTemplateInstantiate.cpp
index 5ad7b34..6d0aa21 100644 (file)
--- a/clang/lib/Sema/SemaTemplateInstantiate.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiate.cpp
@@ -2582,12 +2582,21 @@ Sema::SubstExpr(Expr *E, const MultiLevelTemplateArgumentList &TemplateArgs) {
   return Instantiator.TransformExpr(E);
 }
 
+ExprResult Sema::SubstInitializer(Expr *Init,
+                          const MultiLevelTemplateArgumentList &TemplateArgs,
+                          bool CXXDirectInit) {
+  TemplateInstantiator Instantiator(*this, TemplateArgs,
+                                    SourceLocation(),
+                                    DeclarationName());
+  return Instantiator.TransformInitializer(Init, CXXDirectInit);
+}
+
 bool Sema::SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall,
                       const MultiLevelTemplateArgumentList &TemplateArgs,
                       SmallVectorImpl<Expr *> &Outputs) {
   if (NumExprs == 0)
     return false;
-  
+
   TemplateInstantiator Instantiator(*this, TemplateArgs,
                                     SourceLocation(),
                                     DeclarationName());

diff --git a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
index cca7df3..abe0471 100644 (file)
--- a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -3138,45 +3138,6 @@ Sema::InstantiateMemInitializers(CXXConstructorDecl *New,
                        AnyErrors);
 }
 
-ExprResult Sema::SubstInitializer(Expr *Init,
-                          const MultiLevelTemplateArgumentList &TemplateArgs,
-                          bool CXXDirectInit) {
-  // Initializers are instantiated like expressions, except that various outer
-  // layers are stripped.
-  if (!Init)
-    return Owned(Init);
-
-  if (ExprWithCleanups *ExprTemp = dyn_cast<ExprWithCleanups>(Init))
-    Init = ExprTemp->getSubExpr();
-
-  while (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(Init))
-    Init = Binder->getSubExpr();
-
-  if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Init))
-    Init = ICE->getSubExprAsWritten();
-
-  // If this is a direct-initializer, we take apart CXXConstructExprs.
-  // Everything else is passed through.
-  CXXConstructExpr *Construct;
-  if (!CXXDirectInit || !(Construct = dyn_cast<CXXConstructExpr>(Init)) ||
-      isa<CXXTemporaryObjectExpr>(Construct))
-    return SubstExpr(Init, TemplateArgs);
-
-  SmallVector<Expr*, 8> NewArgs;
-  if (SubstExprs(Construct->getArgs(), Construct->getNumArgs(), true,
-                 TemplateArgs, NewArgs))
-    return ExprError();
-
-  // Treat an empty initializer like none.
-  if (NewArgs.empty())
-    return Owned((Expr*)0);
-
-  // Build a ParenListExpr to represent anything else.
-  // FIXME: Fake locations!
-  SourceLocation Loc = PP.getLocForEndOfToken(Init->getLocStart());
-  return ActOnParenListExpr(Loc, Loc, NewArgs);
-}
-
 // TODO: this could be templated if the various decl types used the
 // same method name.
 static bool isInstantiationOf(ClassTemplateDecl *Pattern,

diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h
index 8d66acb..52f6c4d 100644 (file)
--- a/clang/lib/Sema/TreeTransform.h
+++ b/clang/lib/Sema/TreeTransform.h
@@ -323,6 +323,15 @@ public:
   /// \returns the transformed expression.
   ExprResult TransformExpr(Expr *E);
 
+  /// \brief Transform the given initializer.
+  ///
+  /// By default, this routine transforms an initializer by stripping off the
+  /// semantic nodes added by initialization, then passing the result to
+  /// TransformExpr or TransformExprs.
+  ///
+  /// \returns the transformed initializer.
+  ExprResult TransformInitializer(Expr *Init, bool CXXDirectInit);
+
   /// \brief Transform the given list of expressions.
   ///
   /// This routine transforms a list of expressions by invoking
@@ -2113,6 +2122,7 @@ public:
                                      bool IsElidable,
                                      MultiExprArg Args,
                                      bool HadMultipleCandidates,
+                                     bool ListInitialization,
                                      bool RequiresZeroInit,
                              CXXConstructExpr::ConstructionKind ConstructKind,
                                      SourceRange ParenRange) {
@@ -2124,6 +2134,7 @@ public:
     return getSema().BuildCXXConstructExpr(Loc, T, Constructor, IsElidable,
                                            ConvertedArgs,
                                            HadMultipleCandidates,
+                                           ListInitialization,
                                            RequiresZeroInit, ConstructKind,
                                            ParenRange);
   }
@@ -2575,6 +2586,53 @@ ExprResult TreeTransform<Derived>::TransformExpr(Expr *E) {
 }
 
 template<typename Derived>
+ExprResult TreeTransform<Derived>::TransformInitializer(Expr *Init,
+                                                        bool CXXDirectInit) {
+  // Initializers are instantiated like expressions, except that various outer
+  // layers are stripped.
+  if (!Init)
+    return SemaRef.Owned(Init);
+
+  if (ExprWithCleanups *ExprTemp = dyn_cast<ExprWithCleanups>(Init))
+    Init = ExprTemp->getSubExpr();
+
+  while (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(Init))
+    Init = Binder->getSubExpr();
+
+  if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Init))
+    Init = ICE->getSubExprAsWritten();
+
+  // If this is a direct-initializer, we take apart CXXConstructExprs.
+  // Everything else is passed through.
+  CXXConstructExpr *Construct;
+  if (!(Construct = dyn_cast<CXXConstructExpr>(Init)) ||
+      isa<CXXTemporaryObjectExpr>(Construct) ||
+      (!CXXDirectInit && !Construct->isListInitialization()))
+    return getDerived().TransformExpr(Init);
+
+  SmallVector<Expr*, 8> NewArgs;
+  bool ArgChanged = false;
+  if (getDerived().TransformExprs(Construct->getArgs(), Construct->getNumArgs(),
+                     /*IsCall*/true, NewArgs, &ArgChanged))
+    return ExprError();
+
+  // If this was list initialization, revert to list form.
+  if (Construct->isListInitialization())
+    return getDerived().RebuildInitList(Construct->getLocStart(), NewArgs,
+                                        Construct->getLocEnd(),
+                                        Construct->getType());
+
+  // Treat an empty initializer like none.
+  if (NewArgs.empty())
+    return SemaRef.Owned((Expr*)0);
+
+  // Build a ParenListExpr to represent anything else.
+  SourceRange Parens = Construct->getParenRange();
+  return getDerived().RebuildParenListExpr(Parens.getBegin(), NewArgs,
+                                           Parens.getEnd());
+}
+
+template<typename Derived>
 bool TreeTransform<Derived>::TransformExprs(Expr **Inputs,
                                             unsigned NumInputs,
                                             bool IsCall,
@@ -2656,7 +2714,9 @@ bool TreeTransform<Derived>::TransformExprs(Expr **Inputs,
       continue;
     }
 
-    ExprResult Result = getDerived().TransformExpr(Inputs[I]);
+    ExprResult Result =
+      IsCall ? getDerived().TransformInitializer(Inputs[I], /*DirectInit*/false)
+             : getDerived().TransformExpr(Inputs[I]);
     if (Result.isInvalid())
       return true;
 
@@ -7747,11 +7807,13 @@ TreeTransform<Derived>::TransformDependentScopeDeclRefExpr(
 template<typename Derived>
 ExprResult
 TreeTransform<Derived>::TransformCXXConstructExpr(CXXConstructExpr *E) {
-  // CXXConstructExprs are always implicit, so when we have a
-  // 1-argument construction we just transform that argument.
+  // CXXConstructExprs other than for list-initialization and
+  // CXXTemporaryObjectExpr are always implicit, so when we have
+  // a 1-argument construction we just transform that argument.
   if ((E->getNumArgs() == 1 ||
        (E->getNumArgs() > 1 && getDerived().DropCallArgument(E->getArg(1)))) &&
-      (!getDerived().DropCallArgument(E->getArg(0))))
+      (!getDerived().DropCallArgument(E->getArg(0))) &&
+      !E->isListInitialization())
     return getDerived().TransformExpr(E->getArg(0));
 
   TemporaryBase Rebase(*this, /*FIXME*/E->getLocStart(), DeclarationName());
@@ -7787,6 +7849,7 @@ TreeTransform<Derived>::TransformCXXConstructExpr(CXXConstructExpr *E) {
                                               Constructor, E->isElidable(),
                                               Args,
                                               E->hadMultipleCandidates(),
+                                              E->isListInitialization(),
                                               E->requiresZeroInitialization(),
                                               E->getConstructionKind(),
                                               E->getParenRange());
@@ -7844,6 +7907,7 @@ TreeTransform<Derived>::TransformCXXTemporaryObjectExpr(
     return SemaRef.MaybeBindToTemporary(E);
   }
 
+  // FIXME: Pass in E->isListInitialization().
   return getDerived().RebuildCXXTemporaryObjectExpr(T,
                                           /*FIXME:*/T->getTypeLoc().getEndLoc(),
                                                     Args,

diff --git a/clang/lib/Serialization/ASTReaderStmt.cpp b/clang/lib/Serialization/ASTReaderStmt.cpp
index 529cfea..fe29ee6 100644 (file)
--- a/clang/lib/Serialization/ASTReaderStmt.cpp
+++ b/clang/lib/Serialization/ASTReaderStmt.cpp
@@ -1102,6 +1102,7 @@ void ASTStmtReader::VisitCXXConstructExpr(CXXConstructExpr *E) {
   E->setLocation(ReadSourceLocation(Record, Idx));
   E->setElidable(Record[Idx++]);
   E->setHadMultipleCandidates(Record[Idx++]);
+  E->setListInitialization(Record[Idx++]);
   E->setRequiresZeroInitialization(Record[Idx++]);
   E->setConstructionKind((CXXConstructExpr::ConstructionKind)Record[Idx++]);
   E->ParenRange = ReadSourceRange(Record, Idx);

diff --git a/clang/lib/Serialization/ASTWriterStmt.cpp b/clang/lib/Serialization/ASTWriterStmt.cpp
index 7e8ce42..1591c6c 100644 (file)
--- a/clang/lib/Serialization/ASTWriterStmt.cpp
+++ b/clang/lib/Serialization/ASTWriterStmt.cpp
@@ -1076,6 +1076,7 @@ void ASTStmtWriter::VisitCXXConstructExpr(CXXConstructExpr *E) {
   Writer.AddSourceLocation(E->getLocation(), Record);
   Record.push_back(E->isElidable());
   Record.push_back(E->hadMultipleCandidates());
+  Record.push_back(E->isListInitialization());
   Record.push_back(E->requiresZeroInitialization());
   Record.push_back(E->getConstructionKind()); // FIXME: stable encoding
   Writer.AddSourceRange(E->getParenRange(), Record);

diff --git a/clang/test/Index/recursive-cxx-member-calls.cpp b/clang/test/Index/recursive-cxx-member-calls.cpp
index 501dc29..3f68614 100644 (file)
--- a/clang/test/Index/recursive-cxx-member-calls.cpp
+++ b/clang/test/Index/recursive-cxx-member-calls.cpp
@@ -831,9 +831,9 @@ AttributeList::Kind AttributeList::getKind(const IdentifierInfo * Name) {
 // CHECK-tokens: Punctuation: ")" [87:38 - 87:39] CXXConstructor=StringSwitch<T, R>:87:12 (Definition)
 // CHECK-tokens: Punctuation: ":" [87:40 - 87:41] CXXConstructor=StringSwitch<T, R>:87:12 (Definition)
 // CHECK-tokens: Identifier: "Str" [87:42 - 87:45] MemberRef=Str:84:13
-// CHECK-tokens: Punctuation: "(" [87:45 - 87:46] UnexposedExpr=
+// CHECK-tokens: Punctuation: "(" [87:45 - 87:46] CallExpr=StringRef:38:7
 // CHECK-tokens: Identifier: "Str" [87:46 - 87:49] DeclRefExpr=Str:87:35
-// CHECK-tokens: Punctuation: ")" [87:49 - 87:50] UnexposedExpr=
+// CHECK-tokens: Punctuation: ")" [87:49 - 87:50] CallExpr=StringRef:38:7
 // CHECK-tokens: Punctuation: "," [87:50 - 87:51] CXXConstructor=StringSwitch<T, R>:87:12 (Definition)
 // CHECK-tokens: Identifier: "Result" [87:52 - 87:58] MemberRef=Result:85:12
 // CHECK-tokens: Punctuation: "(" [87:58 - 87:59] UnexposedExpr=
@@ -1843,7 +1843,7 @@ AttributeList::Kind AttributeList::getKind(const IdentifierInfo * Name) {
 // CHECK: 87:35: ParmDecl=Str:87:35 (Definition) Extent=[87:25 - 87:38]
 // CHECK: 87:25: TypeRef=class llvm::StringRef:38:7 Extent=[87:25 - 87:34]
 // CHECK: 87:42: MemberRef=Str:84:13 Extent=[87:42 - 87:45]
-// CHECK: 87:45: UnexposedExpr= Extent=[87:45 - 87:50]
+// CHECK: 87:42: CallExpr=StringRef:38:7 Extent=[87:42 - 87:50]
 // CHECK: 87:46: DeclRefExpr=Str:87:35 Extent=[87:46 - 87:49]
 // CHECK: 87:52: MemberRef=Result:85:12 Extent=[87:52 - 87:58]
 // CHECK: 87:58: UnexposedExpr= Extent=[87:58 - 87:61]

diff --git a/clang/test/SemaCXX/cxx0x-initializer-constructor.cpp b/clang/test/SemaCXX/cxx0x-initializer-constructor.cpp
index a657ec8..45ec0cb 100644 (file)
--- a/clang/test/SemaCXX/cxx0x-initializer-constructor.cpp
+++ b/clang/test/SemaCXX/cxx0x-initializer-constructor.cpp
@@ -306,17 +306,63 @@ namespace init_list_default {
 }
 
 
-// <rdar://problem/11974632>
-namespace rdar11974632 {
+// PR13470, <rdar://problem/11974632>
+namespace PR13470 {
+  struct W {
+    explicit W(int); // expected-note {{here}}
+  };
+
   struct X {
-    X(const X&) = delete;
+    X(const X&) = delete; // expected-note 3 {{here}}
     X(int);
   };
 
+  template<typename T, typename Fn> void call(Fn f) {
+    f({1}); // expected-error {{constructor is explicit}}
+    f(T{1}); // expected-error {{call to deleted constructor}}
+  }
+
+  void ref_w(const W &); // expected-note 2 {{not viable}}
+  void call_ref_w() {
+    ref_w({1}); // expected-error {{no matching function}}
+    ref_w(W{1});
+    call<W>(ref_w); // expected-note {{instantiation of}}
+  }
+
+  void ref_x(const X &);
+  void call_ref_x() {
+    ref_x({1});
+    ref_x(X{1});
+    call<X>(ref_x); // ok
+  }
+
+  void val_x(X); // expected-note 2 {{parameter}}
+  void call_val_x() {
+    val_x({1});
+    val_x(X{1}); // expected-error {{call to deleted constructor}}
+    call<X>(val_x); // expected-note {{instantiation of}}
+  }
+
   template<typename T>
-  struct Y { 
+  struct Y {
     X x{1};
+    void f() { X x{1}; }
+    void h() {
+      ref_w({1}); // expected-error {{no matching function}}
+      ref_w(W{1});
+      ref_x({1});
+      ref_x(X{1});
+      val_x({1});
+      val_x(X{1}); // expected-error {{call to deleted constructor}}
+    }
+    Y() {}
+    Y(int) : x{1} {}
   };
 
   Y<int> yi;
+  Y<int> yi2(0);
+  void g() {
+    yi.f();
+    yi.h(); // ok, all diagnostics produced in template definition
+  }
 }