[clang] Stop dragging a EndLoc around when parsing attributes

[tbaeder]

Summary

I noticed that this is basically always unused. And if it is needed, the end of the attribute range can be used.

[aaron.ballman]

Thank you for working on this! We've (very) slowly been working towards all of the attribute parsing functions taking a ParsedAttributesWithRange so that we don't lose this information in the AST, and this is a good step in the right direction towards that.

clang/lib/Parse/ParseDecl.cpp

820–821

This is a case where we're regressing functionality -- we used to track the actual end location here, but because this doesn't take a ParsedAttributesWithRange, the end location is lost. Can we rework this to take a ParsedAttributesWithRange instead?

clang/lib/Parse/ParseDeclCXX.cpp

4661–4662

Heh, same concern here as above.

clang/lib/Parse/ParseStmt.cpp

1122

It seems like this could be re-flowed to 80-col?

[tbaeder]

In D120888#3359798, @aaron.ballman wrote:

Thank you for working on this! We've (very) slowly been working towards all of the attribute parsing functions taking a ParsedAttributesWithRange so that we don't lose this information in the AST, and this is a good step in the right direction towards that.

Yes, that's what I'm working on. There is a very peculiar test failure in clang/test/SemaOpenCL/address-spaces.cl however, so I can't switch everything over to ParsedAttributesWithRange (and do a rename) at once.

clang/lib/Parse/ParseDecl.cpp

820–821

Pretty sure yes. I already have that change locally anyway, I'll add it to this patch and run the tests.

clang/lib/Parse/ParseDeclCXX.cpp

4661–4662

Also same as above :)

[aaron.ballman]

LGTM aside from two formatting nits, thank you for the cleanup!

clang/lib/Parse/ParsePragma.cpp

1373 ↗

(On Diff #412994)

Probably worth reformatting this before you land.

clang/include/clang/Parse/Parser.h

private:
   /// arbitrary order. e.g.,
   ///
   ///   [[]] __attribute__(()) int i; // OK
   ///   __attribute__(()) [[]] int i; // Not OK
   ///
   /// Such situations should use the specific attribute parsing functionality.
   void ParseAttributes(unsigned WhichAttrKinds,
                        ParsedAttributesWithRange &Attrs,
-                       SourceLocation *End = nullptr,
                        LateParsedAttrList *LateAttrs = nullptr);
   void ParseAttributes(unsigned WhichAttrKinds, ParsedAttributes &Attrs,
-                       SourceLocation *End = nullptr,
                        LateParsedAttrList *LateAttrs = nullptr) {
     ParsedAttributesWithRange AttrsWithRange(AttrFactory);
-    ParseAttributes(WhichAttrKinds, AttrsWithRange, End, LateAttrs);
+    ParseAttributes(WhichAttrKinds, AttrsWithRange, LateAttrs);
     Attrs.takeAllFrom(AttrsWithRange);
   }
   /// \brief Possibly parse attributes based on what syntaxes are desired,
   /// allowing for the order to vary.
   bool MaybeParseAttributes(unsigned WhichAttrKinds,
                             ParsedAttributesWithRange &Attrs,
-                            SourceLocation *End = nullptr,
                             LateParsedAttrList *LateAttrs = nullptr) {
     if (Tok.isOneOf(tok::kw___attribute, tok::kw___declspec) ||
         (standardAttributesAllowed() && isCXX11AttributeSpecifier())) {
-      ParseAttributes(WhichAttrKinds, Attrs, End, LateAttrs);
+      ParseAttributes(WhichAttrKinds, Attrs, LateAttrs);
       return true;
     }
     return false;
   }
   bool MaybeParseAttributes(unsigned WhichAttrKinds, ParsedAttributes &Attrs,
-                            SourceLocation *End = nullptr,
                             LateParsedAttrList *LateAttrs = nullptr) {
     if (Tok.isOneOf(tok::kw___attribute, tok::kw___declspec) ||
         (standardAttributesAllowed() && isCXX11AttributeSpecifier())) {
-      ParseAttributes(WhichAttrKinds, Attrs, End, LateAttrs);
+      ParseAttributes(WhichAttrKinds, Attrs, LateAttrs);
       return true;
     }
     return false;
   }
 
   void MaybeParseGNUAttributes(Declarator &D,
                                LateParsedAttrList *LateAttrs = nullptr) {
     if (Tok.is(tok::kw___attribute)) {
-      ParsedAttributes attrs(AttrFactory);
-      SourceLocation endLoc;
-      ParseGNUAttributes(attrs, &endLoc, LateAttrs, &D);
-      D.takeAttributes(attrs, endLoc);
+      ParsedAttributesWithRange attrs(AttrFactory);
+      ParseGNUAttributes(attrs, LateAttrs, &D);
+      D.takeAttributes(attrs, attrs.Range.getEnd());
     }
   }
 
   /// Parses GNU-style attributes and returns them without source range
   /// information.
   ///
   /// This API is discouraged. Use the version that takes a
   /// ParsedAttributesWithRange instead.
   bool MaybeParseGNUAttributes(ParsedAttributes &Attrs,
-                               SourceLocation *EndLoc = nullptr,
                                LateParsedAttrList *LateAttrs = nullptr) {
     if (Tok.is(tok::kw___attribute)) {
       ParsedAttributesWithRange AttrsWithRange(AttrFactory);
-      ParseGNUAttributes(Attrs, EndLoc, LateAttrs);
+      ParseGNUAttributes(Attrs, LateAttrs);
       Attrs.takeAllFrom(AttrsWithRange);
       return true;
     }
     return false;
   }
 
   bool MaybeParseGNUAttributes(ParsedAttributesWithRange &Attrs,
-                               SourceLocation *EndLoc = nullptr,
                                LateParsedAttrList *LateAttrs = nullptr) {
     if (Tok.is(tok::kw___attribute)) {
-      ParseGNUAttributes(Attrs, EndLoc, LateAttrs);
+      ParseGNUAttributes(Attrs, LateAttrs);
       return true;
     }
     return false;
   }
 
   /// Parses GNU-style attributes and returns them without source range
   /// information.
   ///
   /// This API is discouraged. Use the version that takes a
   /// ParsedAttributesWithRange instead.
   void ParseGNUAttributes(ParsedAttributes &Attrs,
-                          SourceLocation *EndLoc = nullptr,
                           LateParsedAttrList *LateAttrs = nullptr,
                           Declarator *D = nullptr) {
     ParsedAttributesWithRange AttrsWithRange(AttrFactory);
-    ParseGNUAttributes(AttrsWithRange, EndLoc, LateAttrs, D);
+    ParseGNUAttributes(AttrsWithRange, LateAttrs, D);
     Attrs.takeAllFrom(AttrsWithRange);
   }
 
   void ParseGNUAttributes(ParsedAttributesWithRange &Attrs,
-                          SourceLocation *EndLoc = nullptr,
                           LateParsedAttrList *LateAttrs = nullptr,
                           Declarator *D = nullptr);
   void ParseGNUAttributeArgs(IdentifierInfo *AttrName,
                              SourceLocation AttrNameLoc,
                              ParsedAttributes &Attrs, SourceLocation *EndLoc,
                              IdentifierInfo *ScopeName, SourceLocation ScopeLoc,
                              ParsedAttr::Syntax Syntax, Declarator *D);
   IdentifierLoc *ParseIdentifierLoc();
if (!OpenMPTokens.empty()) {
       PP.EnterTokenStream(OpenMPTokens, /*DisableMacroExpansion*/ true,
                           /*IsReinject*/ true);
       ConsumeAnyToken(/*ConsumeCodeCompletionTok*/ true);
     }
   }
   void MaybeParseCXX11Attributes(Declarator &D) {
     if (standardAttributesAllowed() && isCXX11AttributeSpecifier()) {
       ParsedAttributesWithRange attrs(AttrFactory);
-      SourceLocation endLoc;
-      ParseCXX11Attributes(attrs, &endLoc);
-      D.takeAttributes(attrs, endLoc);
+      ParseCXX11Attributes(attrs);
+      D.takeAttributes(attrs, attrs.Range.getEnd());
     }
   }
-  bool MaybeParseCXX11Attributes(ParsedAttributes &attrs,
-                                 SourceLocation *endLoc = nullptr) {
+  bool MaybeParseCXX11Attributes(ParsedAttributes &attrs) {
     if (standardAttributesAllowed() && isCXX11AttributeSpecifier()) {
       ParsedAttributesWithRange attrsWithRange(AttrFactory);
-      ParseCXX11Attributes(attrsWithRange, endLoc);
+      ParseCXX11Attributes(attrsWithRange);
       attrs.takeAllFrom(attrsWithRange);
       return true;
     }
     return false;
   }
   bool MaybeParseCXX11Attributes(ParsedAttributesWithRange &attrs,
-                                 SourceLocation *endLoc = nullptr,
                                  bool OuterMightBeMessageSend = false) {
     if (standardAttributesAllowed() &&
         isCXX11AttributeSpecifier(false, OuterMightBeMessageSend)) {
-      ParseCXX11Attributes(attrs, endLoc);
+      ParseCXX11Attributes(attrs);
       return true;
     }
     return false;
   }
 
   void ParseOpenMPAttributeArgs(IdentifierInfo *AttrName,
                                 CachedTokens &OpenMPTokens);
 
   void ParseCXX11AttributeSpecifierInternal(ParsedAttributes &Attrs,
                                             CachedTokens &OpenMPTokens,
                                             SourceLocation *EndLoc = nullptr);
   void ParseCXX11AttributeSpecifier(ParsedAttributes &Attrs,
                                     SourceLocation *EndLoc = nullptr) {
     CachedTokens OpenMPTokens;
     ParseCXX11AttributeSpecifierInternal(Attrs, OpenMPTokens, EndLoc);
     ReplayOpenMPAttributeTokens(OpenMPTokens);
   }
-  void ParseCXX11Attributes(ParsedAttributesWithRange &attrs,
-                            SourceLocation *EndLoc = nullptr);
+  void ParseCXX11Attributes(ParsedAttributesWithRange &attrs);
   /// Parses a C++11 (or C2x)-style attribute argument list. Returns true
   /// if this results in adding an attribute to the ParsedAttributes list.
   bool ParseCXX11AttributeArgs(IdentifierInfo *AttrName,
                                SourceLocation AttrNameLoc,
                                ParsedAttributes &Attrs, SourceLocation *EndLoc,
                                IdentifierInfo *ScopeName,
                                SourceLocation ScopeLoc,
                                CachedTokens &OpenMPTokens);
 
   IdentifierInfo *TryParseCXX11AttributeIdentifier(
       SourceLocation &Loc,
       Sema::AttributeCompletion Completion = Sema::AttributeCompletion::None,
       const IdentifierInfo *EnclosingScope = nullptr);
 
-  void MaybeParseMicrosoftAttributes(ParsedAttributes &attrs,
-                                     SourceLocation *endLoc = nullptr) {
+  void MaybeParseMicrosoftAttributes(ParsedAttributes &attrs) {
     if (getLangOpts().MicrosoftExt && Tok.is(tok::l_square))
-      ParseMicrosoftAttributes(attrs, endLoc);
+      ParseMicrosoftAttributes(attrs);
   }
   void ParseMicrosoftUuidAttributeArgs(ParsedAttributes &Attrs);
-  void ParseMicrosoftAttributes(ParsedAttributes &attrs,
-                                SourceLocation *endLoc = nullptr);
+  void ParseMicrosoftAttributes(ParsedAttributes &attrs);
   bool MaybeParseMicrosoftDeclSpecs(ParsedAttributes &Attrs,
                                     SourceLocation *End = nullptr) {
     const auto &LO = getLangOpts();
     if (LO.DeclSpecKeyword && Tok.is(tok::kw___declspec)) {
       ParseMicrosoftDeclSpecs(Attrs, End);
       return true;
     }
     return false;

clang/include/clang/Sema/DeclSpec.h

union {
     Expr *ExprRep;
     TemplateIdAnnotation *TemplateIdRep;
   };
 
   /// ExplicitSpecifier - Store information about explicit spicifer.
   ExplicitSpecifier FS_explicit_specifier;
 
   // attributes.
-  ParsedAttributes Attrs;
+  ParsedAttributesWithRange Attrs;
 
   // Scope specifier for the type spec, if applicable.
   CXXScopeSpec TypeScope;
 
   // SourceLocation info.  These are null if the item wasn't specified or if
   // the setting was synthesized.
   SourceRange Range;
 

clang/lib/Parse/ParseDecl.cpp

bool AttrStartIsInMacro =
       Lexer::isAtStartOfMacroExpansion(StartLoc, SM, PP.getLangOpts());
   bool AttrEndIsInMacro =
       Lexer::isAtEndOfMacroExpansion(EndLoc, SM, PP.getLangOpts());
   return AttrStartIsInMacro && AttrEndIsInMacro;
 }
 
 void Parser::ParseAttributes(unsigned WhichAttrKinds,
                              ParsedAttributesWithRange &Attrs,
-                             SourceLocation *End,
                              LateParsedAttrList *LateAttrs) {
   bool MoreToParse;
   do {
     // Assume there's nothing left to parse, but if any attributes are in fact
     // parsed, loop to ensure all specified attribute combinations are parsed.
     MoreToParse = false;
     if (WhichAttrKinds & PAKM_CXX11)
-      MoreToParse |= MaybeParseCXX11Attributes(Attrs, End);
+      MoreToParse |= MaybeParseCXX11Attributes(Attrs);
     if (WhichAttrKinds & PAKM_GNU)
-      MoreToParse |= MaybeParseGNUAttributes(Attrs, End, LateAttrs);
+      MoreToParse |= MaybeParseGNUAttributes(Attrs, LateAttrs);
     if (WhichAttrKinds & PAKM_Declspec)
-      MoreToParse |= MaybeParseMicrosoftDeclSpecs(Attrs, End);
+      MoreToParse |= MaybeParseMicrosoftDeclSpecs(Attrs);
   } while (MoreToParse);
 }
 
 /// ParseGNUAttributes - Parse a non-empty attributes list.
 ///
 /// [GNU] attributes:
 ///         attribute
 ///         attributes attribute

 ///    limited).
 ///  * In C++ mode, if the attribute argument list starts with an identifier,
 ///    and the attribute *wants* an identifier, it is parsed as an identifier.
 ///    At block scope, any additional tokens between the identifier and the
 ///    ',' or ')' are ignored, otherwise they produce a parse error.
 ///
 /// We follow the C++ model, but don't allow junk after the identifier.
 void Parser::ParseGNUAttributes(ParsedAttributesWithRange &Attrs,
-                                SourceLocation *EndLoc,
                                 LateParsedAttrList *LateAttrs, Declarator *D) {
   assert(Tok.is(tok::kw___attribute) && "Not a GNU attribute list!");
 
-  SourceLocation StartLoc = Tok.getLocation(), Loc;
-
-  if (!EndLoc)
-    EndLoc = &Loc;
+  SourceLocation StartLoc = Tok.getLocation();
+  SourceLocation EndLoc = StartLoc;
 
   while (Tok.is(tok::kw___attribute)) {
     SourceLocation AttrTokLoc = ConsumeToken();
     unsigned OldNumAttrs = Attrs.size();
     unsigned OldNumLateAttrs = LateAttrs ? LateAttrs->size() : 0;
 
     if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
                          "attribute")) {
do {
       if (Tok.isNot(tok::l_paren)) {
         Attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
                      ParsedAttr::AS_GNU);
         continue;
       }
 
       // Handle "parameterized" attributes
       if (!LateAttrs || !isAttributeLateParsed(*AttrName)) {
-        ParseGNUAttributeArgs(AttrName, AttrNameLoc, Attrs, EndLoc, nullptr,
+        ParseGNUAttributeArgs(AttrName, AttrNameLoc, Attrs, &EndLoc, nullptr,
                               SourceLocation(), ParsedAttr::AS_GNU, D);
         continue;
       }
 
       // Handle attributes with arguments that require late parsing.
       LateParsedAttribute *LA =
           new LateParsedAttribute(this, *AttrName, AttrNameLoc);
       LateAttrs->push_back(LA);
do {
       LA->Toks.push_back(Eof);
     } while (Tok.is(tok::comma));
 
     if (ExpectAndConsume(tok::r_paren))
       SkipUntil(tok::r_paren, StopAtSemi);
     SourceLocation Loc = Tok.getLocation();
     if (ExpectAndConsume(tok::r_paren))
       SkipUntil(tok::r_paren, StopAtSemi);
-    if (EndLoc)
-      *EndLoc = Loc;
+    EndLoc = Loc;
 
     // If this was declared in a macro, attach the macro IdentifierInfo to the
     // parsed attribute.
     auto &SM = PP.getSourceManager();
     if (!SM.isWrittenInBuiltinFile(SM.getSpellingLoc(AttrTokLoc)) &&
         FindLocsWithCommonFileID(PP, AttrTokLoc, Loc)) {
       CharSourceRange ExpansionRange = SM.getExpansionRange(AttrTokLoc);
       StringRef FoundName =
           Lexer::getSourceText(ExpansionRange, SM, PP.getLangOpts());
       IdentifierInfo *MacroII = PP.getIdentifierInfo(FoundName);
 
       for (unsigned i = OldNumAttrs; i < Attrs.size(); ++i)
         Attrs[i].setMacroIdentifier(MacroII, ExpansionRange.getBegin());
 
       if (LateAttrs) {
         for (unsigned i = OldNumLateAttrs; i < LateAttrs->size(); ++i)
           (*LateAttrs)[i]->MacroII = MacroII;
       }
     }
   }
 
-  Attrs.Range = SourceRange(StartLoc, *EndLoc);
+  Attrs.Range = SourceRange(StartLoc, EndLoc);
 }
 
 /// Determine whether the given attribute has an identifier argument.
 static bool attributeHasIdentifierArg(const IdentifierInfo &II) {
 #define CLANG_ATTR_IDENTIFIER_ARG_LIST
   return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
 #include "clang/Parse/AttrParserStringSwitches.inc"
            .Default(false);
while (Tok.isNot(tok::r_paren)) {
         Diag(Tok.getLocation(), diag::err_expected_lparen_after)
             << AttrName->getName();
 
       if (!AttrHandled)
         Attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
                      ParsedAttr::AS_Declspec);
     }
     T.consumeClose();
     if (End)
       *End = T.getCloseLocation();
   }
 }
 
 void Parser::ParseMicrosoftTypeAttributes(ParsedAttributes &attrs) {
   // Treat these like attributes
   while (true) {
     switch (Tok.getKind()) {
     case tok::kw___fastcall:
case tok::annot_template_id: {
       CXXScopeSpec SS;
       AnnotateTemplateIdTokenAsType(SS);
       continue;
     }
 
     // Attributes support.
     case tok::kw___attribute:
     case tok::kw___declspec:
-      ParseAttributes(PAKM_GNU | PAKM_Declspec, DS.getAttributes(), nullptr,
-                      LateAttrs);
+      ParseAttributes(PAKM_GNU | PAKM_Declspec, DS.getAttributes(), LateAttrs);
       continue;
 
     // Microsoft single token adornments.
     case tok::kw___forceinline: {
       isInvalid = DS.setFunctionSpecForceInline(Loc, PrevSpec, DiagID);
       IdentifierInfo *AttrName = Tok.getIdentifierInfo();
       SourceLocation AttrNameLoc = Tok.getLocation();
       DS.getAttributes().addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc,

clang/lib/Parse/ParseDeclCXX.cpp

void Parser::ParseCXX11AttributeSpecifierInternal(ParsedAttributes &Attrs,
   if (ExpectAndConsume(tok::r_square))
     SkipUntil(tok::r_square);
 }
 
 /// ParseCXX11Attributes - Parse a C++11 or C2x attribute-specifier-seq.
 ///
 /// attribute-specifier-seq:
 ///       attribute-specifier-seq[opt] attribute-specifier
-void Parser::ParseCXX11Attributes(ParsedAttributesWithRange &attrs,
-                                  SourceLocation *endLoc) {
+void Parser::ParseCXX11Attributes(ParsedAttributesWithRange &attrs) {
   assert(standardAttributesAllowed());
 
-  SourceLocation StartLoc = Tok.getLocation(), Loc;
-  if (!endLoc)
-    endLoc = &Loc;
+  SourceLocation StartLoc = Tok.getLocation();
+  SourceLocation EndLoc = StartLoc;
 
   do {
-    ParseCXX11AttributeSpecifier(attrs, endLoc);
+    ParseCXX11AttributeSpecifier(attrs, &EndLoc);
   } while (isCXX11AttributeSpecifier());
 
-  attrs.Range = SourceRange(StartLoc, *endLoc);
+  attrs.Range = SourceRange(StartLoc, EndLoc);
 }
 
 void Parser::DiagnoseAndSkipCXX11Attributes() {
   // Start and end location of an attribute or an attribute list.
   SourceLocation StartLoc = Tok.getLocation();
   SourceLocation EndLoc = SkipCXX11Attributes();
 
   if (EndLoc.isValid()) {

 /// ParseMicrosoftAttributes - Parse Microsoft attributes [Attr]
 ///
 /// [MS] ms-attribute:
 ///             '[' token-seq ']'
 ///
 /// [MS] ms-attribute-seq:
 ///             ms-attribute[opt]
 ///             ms-attribute ms-attribute-seq
-void Parser::ParseMicrosoftAttributes(ParsedAttributes &attrs,
-                                      SourceLocation *endLoc) {
+void Parser::ParseMicrosoftAttributes(ParsedAttributes &attrs) {
   assert(Tok.is(tok::l_square) && "Not a Microsoft attribute list");
+  // FIXME: ParseMicrosoftAttributes() does not support
+  // ParsedAttributesWithRange.
 
   do {
     // FIXME: If this is actually a C++11 attribute, parse it as one.
     BalancedDelimiterTracker T(*this, tok::l_square);
     T.consumeOpen();
 
     // Skip most ms attributes except for a specific list.
     while (true) {
while (true) {
         break;
       if (Tok.getIdentifierInfo()->getName() == "uuid")
         ParseMicrosoftUuidAttributeArgs(attrs);
       else
         ConsumeToken();
     }
 
     T.consumeClose();
-    if (endLoc)
-      *endLoc = T.getCloseLocation();
   } while (Tok.is(tok::l_square));
 }
 
 void Parser::ParseMicrosoftIfExistsClassDeclaration(
     DeclSpec::TST TagType, ParsedAttributes &AccessAttrs,
     AccessSpecifier &CurAS) {
   IfExistsCondition Result;
   if (ParseMicrosoftIfExistsCondition(Result))

clang/lib/Parse/ParseExprCXX.cpp

ExprResult Parser::ParseLambdaExpressionAfterIntroducer(
   // scope while parsing the lambda-declarator and compound-statement.
 
   // Parse lambda-declarator[opt].
   DeclSpec DS(AttrFactory);
   Declarator D(DS, DeclaratorContext::LambdaExpr);
   TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
   Actions.PushLambdaScope();
 
-  ParsedAttributes Attr(AttrFactory);
+  ParsedAttributesWithRange Attr(AttrFactory);
   if (getLangOpts().CUDA) {
     // In CUDA code, GNU attributes are allowed to appear immediately after the
     // "[...]", even if there is no "(...)" before the lambda body.
     MaybeParseGNUAttributes(D);
   }
 
   // Helper to emit a warning if we see a CUDA host/device/global attribute
   // after '(...)'. nvcc doesn't accept this.
auto ParseLambdaSpecifiers =
         ESpecType = tryParseExceptionSpecification(
             /*Delayed=*/false, ESpecRange, DynamicExceptions,
             DynamicExceptionRanges, NoexceptExpr, ExceptionSpecTokens);
 
         if (ESpecType != EST_None)
           DeclEndLoc = ESpecRange.getEnd();
 
         // Parse attribute-specifier[opt].
-        MaybeParseCXX11Attributes(Attr, &DeclEndLoc);
+        if (MaybeParseCXX11Attributes(Attr))
+          DeclEndLoc = Attr.Range.getEnd();
 
         // Parse OpenCL addr space attribute.
         if (Tok.isOneOf(tok::kw___private, tok::kw___global, tok::kw___local,
                         tok::kw___constant, tok::kw___generic)) {
           ParseOpenCLQualifiers(DS.getAttributes());
           ConsumeToken();
         }
 

clang/lib/Parse/ParseStmt.cpp

Parser::ParseStatementOrDeclaration(StmtVector &Stmts,
   ParenBraceBracketBalancer BalancerRAIIObj(*this);
 
   // Because we're parsing either a statement or a declaration, the order of
   // attribute parsing is important. [[]] attributes at the start of a
   // statement are different from [[]] attributes that follow an __attribute__
   // at the start of the statement. Thus, we're not using MaybeParseAttributes
   // here because we don't want to allow arbitrary orderings.
   ParsedAttributesWithRange Attrs(AttrFactory);
-  MaybeParseCXX11Attributes(Attrs, nullptr, /*MightBeObjCMessageSend*/ true);
+  MaybeParseCXX11Attributes(Attrs, /*MightBeObjCMessageSend*/ true);
   if (getLangOpts().OpenCL)
     MaybeParseGNUAttributes(Attrs);
 
   StmtResult Res = ParseStatementOrDeclarationAfterAttributes(
       Stmts, StmtCtx, TrailingElseLoc, Attrs);
   MaybeDestroyTemplateIds();
 
   assert((Attrs.empty() || Res.isInvalid() || Res.isUsable()) &&
if (Tok.isNot(tok::kw___extension__)) {
       // operator for expressions.  Consume multiple __extension__ markers here
       // until we can determine which is which.
       // FIXME: This loses extension expressions in the AST!
       SourceLocation ExtLoc = ConsumeToken();
       while (Tok.is(tok::kw___extension__))
         ConsumeToken();
 
       ParsedAttributesWithRange attrs(AttrFactory);
-      MaybeParseCXX11Attributes(attrs, nullptr,
+      MaybeParseCXX11Attributes(attrs,
                                 /*MightBeObjCMessageSend*/ true);
 
       // If this is the start of a declaration, parse it as such.
       if (isDeclarationStatement()) {
         // __extension__ silences extension warnings in the subdeclaration.
         // FIXME: Save the __extension__ on the decl as a node somehow?
         ExtensionRAIIObject O(Diags);
 

clang/lib/Parse/ParseTentative.cpp

if (Tok.is(tok::ellipsis)) {
         return TPResult::False;
     }
 
     // An attribute-specifier-seq here is a sign of a function declarator.
     if (isCXX11AttributeSpecifier(/*Disambiguate*/false,
                                   /*OuterMightBeMessageSend*/true))
       return TPResult::True;
 
-    ParsedAttributes attrs(AttrFactory);
+    ParsedAttributesWithRange attrs(AttrFactory);
     MaybeParseMicrosoftAttributes(attrs);
 
     // decl-specifier-seq
     // A parameter-declaration's initializer must be preceded by an '=', so
     // decl-specifier-seq '{' is not a parameter in C++11.
     TPResult TPR = isCXXDeclarationSpecifier(TPResult::False,
                                              InvalidAsDeclaration);
     // A declaration-specifier (not followed by '(' or '{') means this can't be