Alter the interface of GetTypeForDeclarator to return a TypeSourceInfo*.

This is never null, but the associated type might be.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@105503 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/AST/ASTContext.h

@@ -162,6 +162,8 @@ class ASTContext {
   /// \brief Type for the Block descriptor for Blocks CodeGen.
   RecordDecl *BlockDescriptorExtendedType;
 
+  TypeSourceInfo NullTypeSourceInfo;
+
   /// \brief Keeps track of all declaration attributes.
   ///
   /// Since so few decls have attrs, we keep them in a hash map instead of
@@ -1272,6 +1274,8 @@ public:
   TypeSourceInfo *
   getTrivialTypeSourceInfo(QualType T, SourceLocation Loc = SourceLocation());
 
+  TypeSourceInfo *getNullTypeSourceInfo() { return &NullTypeSourceInfo; }
+
   /// \brief Add a deallocation callback that will be invoked when the 
   /// ASTContext is destroyed.
   ///

lib/AST/ASTContext.cpp

@@ -44,6 +44,7 @@ ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM,
   NSConstantStringTypeDecl(0),
   ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0),
   sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0),
+  NullTypeSourceInfo(QualType()),
   SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t),
   Idents(idents), Selectors(sels),
   BuiltinInfo(builtins),

lib/Sema/Sema.h

@@ -736,9 +736,8 @@ public:
                                   DeclarationName Entity);
   QualType BuildBlockPointerType(QualType T, unsigned Quals,
                                  SourceLocation Loc, DeclarationName Entity);
-  QualType GetTypeForDeclarator(Declarator &D, Scope *S,
-                                TypeSourceInfo **TInfo = 0,
-                                TagDecl **OwnedDecl = 0);
+  TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S,
+                                       TagDecl **OwnedDecl = 0);
   TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T,
                                                TypeSourceInfo *ReturnTypeInfo);
   /// \brief Create a LocInfoType to hold the given QualType and TypeSourceInfo.

lib/Sema/SemaDecl.cpp

@@ -1795,8 +1795,7 @@ Sema::DeclPtrTy Sema::BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS,
 
   // Mock up a declarator.
   Declarator Dc(DS, Declarator::TypeNameContext);
-  TypeSourceInfo *TInfo = 0;
-  GetTypeForDeclarator(Dc, S, &TInfo);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S);
   assert(TInfo && "couldn't build declarator info for anonymous struct/union");
 
   // Create a declaration for this anonymous struct/union.
@@ -2091,8 +2090,8 @@ Sema::HandleDeclarator(Scope *S, Declarator &D,
 
   NamedDecl *New;
 
-  TypeSourceInfo *TInfo = 0;
-  QualType R = GetTypeForDeclarator(D, S, &TInfo);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
+  QualType R = TInfo->getType();
 
   LookupResult Previous(*this, Name, D.getIdentifierLoc(), LookupOrdinaryName,
                         ForRedeclaration);
@@ -4258,9 +4257,9 @@ Sema::ActOnParamDeclarator(Scope *S, Declarator &D) {
   if (getLangOptions().CPlusPlus)
     CheckExtraCXXDefaultArguments(D);
 
-  TypeSourceInfo *TInfo = 0;
   TagDecl *OwnedDecl = 0;
-  QualType parmDeclType = GetTypeForDeclarator(D, S, &TInfo, &OwnedDecl);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S, &OwnedDecl);
+  QualType parmDeclType = TInfo->getType();
 
   if (getLangOptions().CPlusPlus && OwnedDecl && OwnedDecl->isDefinition()) {
     // C++ [dcl.fct]p6:
@@ -5635,8 +5634,8 @@ FieldDecl *Sema::HandleField(Scope *S, RecordDecl *Record,
   SourceLocation Loc = DeclStart;
   if (II) Loc = D.getIdentifierLoc();
 
-  TypeSourceInfo *TInfo = 0;
-  QualType T = GetTypeForDeclarator(D, S, &TInfo);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
+  QualType T = TInfo->getType();
   if (getLangOptions().CPlusPlus)
     CheckExtraCXXDefaultArguments(D);
 
@@ -6009,8 +6008,8 @@ Sema::DeclPtrTy Sema::ActOnIvar(Scope *S,
   // FIXME: Unnamed fields can be handled in various different ways, for
   // example, unnamed unions inject all members into the struct namespace!
 
-  TypeSourceInfo *TInfo = 0;
-  QualType T = GetTypeForDeclarator(D, S, &TInfo);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
+  QualType T = TInfo->getType();
 
   if (BitWidth) {
     // 6.7.2.1p3, 6.7.2.1p4

lib/Sema/SemaDeclCXX.cpp

@@ -5467,8 +5467,8 @@ VarDecl *Sema::BuildExceptionDeclaration(Scope *S, QualType ExDeclType,
 /// ActOnExceptionDeclarator - Parsed the exception-declarator in a C++ catch
 /// handler.
 Sema::DeclPtrTy Sema::ActOnExceptionDeclarator(Scope *S, Declarator &D) {
-  TypeSourceInfo *TInfo = 0;
-  QualType ExDeclType = GetTypeForDeclarator(D, S, &TInfo);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
+  QualType ExDeclType = TInfo->getType();
 
   bool Invalid = D.isInvalidType();
   IdentifierInfo *II = D.getIdentifier();
@@ -5622,14 +5622,11 @@ Sema::DeclPtrTy Sema::ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
   // friend templates because ActOnTag never produces a ClassTemplateDecl
   // for a TUK_Friend.
   Declarator TheDeclarator(DS, Declarator::MemberContext);
-  TypeSourceInfo *TSI;
-  QualType T = GetTypeForDeclarator(TheDeclarator, S, &TSI);
+  TypeSourceInfo *TSI = GetTypeForDeclarator(TheDeclarator, S);
+  QualType T = TSI->getType();
   if (TheDeclarator.isInvalidType())
     return DeclPtrTy();
 
-  if (!TSI)
-    TSI = Context.getTrivialTypeSourceInfo(T, DS.getSourceRange().getBegin());
-  
   // This is definitely an error in C++98.  It's probably meant to
   // be forbidden in C++0x, too, but the specification is just
   // poorly written.
@@ -5691,8 +5688,8 @@ Sema::ActOnFriendFunctionDecl(Scope *S,
   assert(DS.getStorageClassSpec() == DeclSpec::SCS_unspecified);
 
   SourceLocation Loc = D.getIdentifierLoc();
-  TypeSourceInfo *TInfo = 0;
-  QualType T = GetTypeForDeclarator(D, S, &TInfo);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
+  QualType T = TInfo->getType();
 
   // C++ [class.friend]p1
   //   A friend of a class is a function or class....
@@ -6056,9 +6053,9 @@ Sema::ActOnCXXConditionDeclaration(Scope *S, Declarator &D) {
   assert(D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&
          "Parser allowed 'typedef' as storage class of condition decl.");
   
-  TypeSourceInfo *TInfo = 0;
   TagDecl *OwnedTag = 0;
-  QualType Ty = GetTypeForDeclarator(D, S, &TInfo, &OwnedTag);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S, &OwnedTag);
+  QualType Ty = TInfo->getType();
   
   if (Ty->isFunctionType()) { // The declarator shall not specify a function...
                               // We exit without creating a CXXConditionDeclExpr because a FunctionDecl

lib/Sema/SemaDeclObjC.cpp

@@ -1775,9 +1775,9 @@ Sema::DeclPtrTy Sema::ActOnObjCExceptionDecl(Scope *S, Declarator &D) {
   if (getLangOptions().CPlusPlus)
     CheckExtraCXXDefaultArguments(D);
   
-  TypeSourceInfo *TInfo = 0;
   TagDecl *OwnedDecl = 0;
-  QualType ExceptionType = GetTypeForDeclarator(D, S, &TInfo, &OwnedDecl);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S, &OwnedDecl);
+  QualType ExceptionType = TInfo->getType();
   
   if (getLangOptions().CPlusPlus && OwnedDecl && OwnedDecl->isDefinition()) {
     // Objective-C++: Types shall not be defined in exception types.

lib/Sema/SemaExpr.cpp

@@ -6996,9 +6996,9 @@ void Sema::ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope) {
   assert(ParamInfo.getIdentifier()==0 && "block-id should have no identifier!");
   BlockScopeInfo *CurBlock = getCurBlock();
 
-  TypeSourceInfo *Sig = 0;
-  QualType T = GetTypeForDeclarator(ParamInfo, CurScope, &Sig);
+  TypeSourceInfo *Sig = GetTypeForDeclarator(ParamInfo, CurScope);
   CurBlock->TheDecl->setSignatureAsWritten(Sig);
+  QualType T = Sig->getType();
 
   bool isVariadic;
   QualType RetTy;

lib/Sema/SemaExprCXX.cpp

@@ -666,8 +666,8 @@ Sema::ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal,
   }
 
   //FIXME: Store TypeSourceInfo in CXXNew expression.
-  TypeSourceInfo *TInfo = 0;
-  QualType AllocType = GetTypeForDeclarator(D, /*Scope=*/0, &TInfo);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, /*Scope=*/0);
+  QualType AllocType = TInfo->getType();
   if (D.isInvalidType())
     return ExprError();
     

lib/Sema/SemaObjCProperty.cpp

@@ -41,8 +41,8 @@ Sema::DeclPtrTy Sema::ActOnProperty(Scope *S, SourceLocation AtLoc,
                     !(Attributes & ObjCDeclSpec::DQ_PR_retain) &&
                     !(Attributes & ObjCDeclSpec::DQ_PR_copy)));
 
-  TypeSourceInfo *TSI = 0;
-  QualType T = GetTypeForDeclarator(FD.D, S, &TSI);
+  TypeSourceInfo *TSI = GetTypeForDeclarator(FD.D, S);
+  QualType T = TSI->getType();
   if (T->isReferenceType()) {
     Diag(AtLoc, diag::error_reference_property);
     return DeclPtrTy();

lib/Sema/SemaTemplate.cpp

@@ -586,8 +586,8 @@ Sema::CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc) {
 Sema::DeclPtrTy Sema::ActOnNonTypeTemplateParameter(Scope *S, Declarator &D,
                                                     unsigned Depth,
                                                     unsigned Position) {
-  TypeSourceInfo *TInfo = 0;
-  QualType T = GetTypeForDeclarator(D, S, &TInfo);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
+  QualType T = TInfo->getType();
 
   assert(S->isTemplateParamScope() &&
          "Non-type template parameter not in template parameter scope!");
@@ -4970,7 +4970,8 @@ Sema::DeclResult Sema::ActOnExplicitInstantiation(Scope *S,
     S = S->getParent();
 
   // Determine the type of the declaration.
-  QualType R = GetTypeForDeclarator(D, S, 0);
+  TypeSourceInfo *T = GetTypeForDeclarator(D, S);
+  QualType R = T->getType();
   if (R.isNull())
     return true;
   

lib/Sema/SemaType.cpp

@@ -947,9 +947,11 @@ QualType Sema::GetTypeFromParser(TypeTy *Ty, TypeSourceInfo **TInfo) {
 /// If OwnedDecl is non-NULL, and this declarator's decl-specifier-seq
 /// owns the declaration of a type (e.g., the definition of a struct
 /// type), then *OwnedDecl will receive the owned declaration.
-QualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S,
-                                    TypeSourceInfo **TInfo,
-                                    TagDecl **OwnedDecl) {
+///
+/// The result of this call will never be null, but the associated
+/// type may be a null type if there's an unrecoverable error.
+TypeSourceInfo *Sema::GetTypeForDeclarator(Declarator &D, Scope *S,
+                                           TagDecl **OwnedDecl) {
   // Determine the type of the declarator. Not all forms of declarator
   // have a type.
   QualType T;
@@ -980,22 +982,18 @@ QualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S,
     // Constructors and destructors don't have return types. Use
     // "void" instead. 
     T = Context.VoidTy;
-      
-    if (TInfo)
-      ReturnTypeInfo = Context.getTrivialTypeSourceInfo(T, 
-                                                    D.getName().StartLocation);
     break;
 
   case UnqualifiedId::IK_ConversionFunctionId:
     // The result type of a conversion function is the type that it
     // converts to.
     T = GetTypeFromParser(D.getName().ConversionFunctionId, 
-                          TInfo? &ReturnTypeInfo : 0);
+                          &ReturnTypeInfo);
     break;
   }
   
   if (T.isNull())
-    return T;
+    return Context.getNullTypeSourceInfo();
 
   if (T == Context.UndeducedAutoTy) {
     int Error = -1;
@@ -1386,14 +1384,11 @@ QualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S,
 
   DiagnoseDelayedFnAttrs(*this, FnAttrsFromPreviousChunk);
 
-  if (TInfo) {
-    if (D.isInvalidType())
-      *TInfo = 0;
-    else
-      *TInfo = GetTypeSourceInfoForDeclarator(D, T, ReturnTypeInfo);
-  }
-
-  return T;
+  if (T.isNull())
+    return Context.getNullTypeSourceInfo();
+  else if (D.isInvalidType())
+    return Context.getTrivialTypeSourceInfo(T);
+  return GetTypeSourceInfoForDeclarator(D, T, ReturnTypeInfo);
 }
 
 namespace {
@@ -1695,9 +1690,9 @@ Sema::TypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) {
   // the parser.
   assert(D.getIdentifier() == 0 && "Type name should have no identifier!");
 
-  TypeSourceInfo *TInfo = 0;
   TagDecl *OwnedTag = 0;
-  QualType T = GetTypeForDeclarator(D, S, &TInfo, &OwnedTag);
+  TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S, &OwnedTag);
+  QualType T = TInfo->getType();
   if (D.isInvalidType())
     return true;
 
@@ -1714,9 +1709,7 @@ Sema::TypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) {
         << Context.getTypeDeclType(OwnedTag);
   }
 
-  if (TInfo)
-    T = CreateLocInfoType(T, TInfo);
-
+  T = CreateLocInfoType(T, TInfo);
   return T.getAsOpaquePtr();
 }