[C++11] Use 'nullptr'. Lex edition.

llvm-svn: 209083

1 files changed, 29 insertions, 27 deletions

diff --git a/clang/lib/Lex/PPMacroExpansion.cpp b/clang/lib/Lex/PPMacroExpansion.cpp
index fa517e7fa81..4278faef708 100644
--- a/clang/lib/Lex/PPMacroExpansion.cpp
+++ b/clang/lib/Lex/PPMacroExpansion.cpp
@@ -103,8 +103,8 @@ void Preprocessor::RegisterBuiltinMacros() {
     Ident__identifier = RegisterBuiltinMacro(*this, "__identifier");
     Ident__pragma = RegisterBuiltinMacro(*this, "__pragma");
   } else {
-    Ident__identifier = 0;
-    Ident__pragma = 0;
+    Ident__identifier = nullptr;
+    Ident__pragma = nullptr;
   }
 
   // Clang Extensions.
@@ -125,10 +125,10 @@ void Preprocessor::RegisterBuiltinMacros() {
     if (!LangOpts.CurrentModule.empty())
       Ident__MODULE__ = RegisterBuiltinMacro(*this, "__MODULE__");
     else
-      Ident__MODULE__ = 0;
+      Ident__MODULE__ = nullptr;
   } else {
-    Ident__building_module = 0;
-    Ident__MODULE__ = 0;
+    Ident__building_module = nullptr;
+    Ident__MODULE__ = nullptr;
   }
 }
 
@@ -140,7 +140,7 @@ static bool isTrivialSingleTokenExpansion(const MacroInfo *MI,
   IdentifierInfo *II = MI->getReplacementToken(0).getIdentifierInfo();
 
   // If the token isn't an identifier, it's always literally expanded.
-  if (II == 0) return true;
+  if (!II) return true;
 
   // If the information about this identifier is out of date, update it from
   // the external source.
@@ -228,7 +228,8 @@ bool Preprocessor::HandleMacroExpandedIdentifier(Token &Identifier,
   // If this is a builtin macro, like __LINE__ or _Pragma, handle it specially.
   if (MI->isBuiltinMacro()) {
     if (Callbacks) Callbacks->MacroExpands(Identifier, MD,
-                                           Identifier.getLocation(),/*Args=*/0);
+                                           Identifier.getLocation(),
+                                           /*Args=*/nullptr);
     ExpandBuiltinMacro(Identifier);
     return true;
   }
@@ -236,7 +237,7 @@ bool Preprocessor::HandleMacroExpandedIdentifier(Token &Identifier,
   /// Args - If this is a function-like macro expansion, this contains,
   /// for each macro argument, the list of tokens that were provided to the
   /// invocation.
-  MacroArgs *Args = 0;
+  MacroArgs *Args = nullptr;
 
   // Remember where the end of the expansion occurred.  For an object-like
   // macro, this is the identifier.  For a function-like macro, this is the ')'.
@@ -254,7 +255,7 @@ bool Preprocessor::HandleMacroExpandedIdentifier(Token &Identifier,
     InMacroArgs = false;
 
     // If there was an error parsing the arguments, bail out.
-    if (Args == 0) return true;
+    if (!Args) return true;
 
     ++NumFnMacroExpanded;
   } else {
@@ -282,7 +283,8 @@ bool Preprocessor::HandleMacroExpandedIdentifier(Token &Identifier,
         for (unsigned i=0, e = DelayedMacroExpandsCallbacks.size(); i!=e; ++i) {
           MacroExpandsInfo &Info = DelayedMacroExpandsCallbacks[i];
           // FIXME: We lose macro args info with delayed callback.
-          Callbacks->MacroExpands(Info.Tok, Info.MD, Info.Range, /*Args=*/0);
+          Callbacks->MacroExpands(Info.Tok, Info.MD, Info.Range,
+                                  /*Args=*/nullptr);
         }
         DelayedMacroExpandsCallbacks.clear();
       }
@@ -557,7 +559,7 @@ MacroArgs *Preprocessor::ReadFunctionLikeMacroArgs(Token &MacroName,
             << MacroName.getIdentifierInfo();
           // Do not lose the EOF/EOD.  Return it to the client.
           MacroName = Tok;
-          return 0;
+          return nullptr;
         } else {
           // Do not lose the EOF/EOD.
           Token *Toks = new Token[1];
@@ -589,7 +591,7 @@ MacroArgs *Preprocessor::ReadFunctionLikeMacroArgs(Token &MacroName,
         // If this is a comment token in the argument list and we're just in
         // -C mode (not -CC mode), discard the comment.
         continue;
-      } else if (Tok.getIdentifierInfo() != 0) {
+      } else if (Tok.getIdentifierInfo() != nullptr) {
         // Reading macro arguments can cause macros that we are currently
         // expanding from to be popped off the expansion stack.  Doing so causes
         // them to be reenabled for expansion.  Here we record whether any
@@ -681,10 +683,10 @@ MacroArgs *Preprocessor::ReadFunctionLikeMacroArgs(Token &MacroName,
           DB << *Range;
         }
       }
-      return 0;
+      return nullptr;
     }
     if (FixedNumArgs != MinArgsExpected)
-      return 0;
+      return nullptr;
 
     DiagnosticBuilder DB = Diag(MacroName, diag::note_suggest_parens_for_macro);
     for (SmallVector<SourceRange, 4>::iterator
@@ -751,7 +753,7 @@ MacroArgs *Preprocessor::ReadFunctionLikeMacroArgs(Token &MacroName,
       Diag(Tok, diag::err_too_few_args_in_macro_invoc);
       Diag(MI->getDefinitionLoc(), diag::note_macro_here)
         << MacroName.getIdentifierInfo();
-      return 0;
+      return nullptr;
     }
 
     // Add a marker EOF token to the end of the token list for this argument.
@@ -773,7 +775,7 @@ MacroArgs *Preprocessor::ReadFunctionLikeMacroArgs(Token &MacroName,
     Diag(MacroName, diag::err_too_many_args_in_macro_invoc);
     Diag(MI->getDefinitionLoc(), diag::note_macro_here)
       << MacroName.getIdentifierInfo();
-    return 0;
+    return nullptr;
   }
 
   return MacroArgs::create(MI, ArgTokens, isVarargsElided, *this);
@@ -788,7 +790,7 @@ Token *Preprocessor::cacheMacroExpandedTokens(TokenLexer *tokLexer,
                                               ArrayRef<Token> tokens) {
   assert(tokLexer);
   if (tokens.empty())
-    return 0;
+    return nullptr;
 
   size_t newIndex = MacroExpandedTokens.size();
   bool cacheNeedsToGrow = tokens.size() >
@@ -824,7 +826,7 @@ void Preprocessor::removeCachedMacroExpandedTokensOfLastLexer() {
 /// the identifier tokens inserted.
 static void ComputeDATE_TIME(SourceLocation &DATELoc, SourceLocation &TIMELoc,
                              Preprocessor &PP) {
-  time_t TT = time(0);
+  time_t TT = time(nullptr);
   struct tm *TM = localtime(&TT);
 
   static const char * const Months[] = {
@@ -1154,18 +1156,18 @@ static bool EvaluateHasIncludeCommon(Token &Tok,
   // Search include directories.
   const DirectoryLookup *CurDir;
   const FileEntry *File =
-      PP.LookupFile(FilenameLoc, Filename, isAngled, LookupFrom, CurDir, NULL,
-                    NULL, NULL);
+      PP.LookupFile(FilenameLoc, Filename, isAngled, LookupFrom, CurDir,
+                    nullptr, nullptr, nullptr);
 
   // Get the result value.  A result of true means the file exists.
-  return File != 0;
+  return File != nullptr;
 }
 
 /// EvaluateHasInclude - Process a '__has_include("path")' expression.
 /// Returns true if successful.
 static bool EvaluateHasInclude(Token &Tok, IdentifierInfo *II,
                                Preprocessor &PP) {
-  return EvaluateHasIncludeCommon(Tok, II, PP, NULL);
+  return EvaluateHasIncludeCommon(Tok, II, PP, nullptr);
 }
 
 /// EvaluateHasIncludeNext - Process '__has_include_next("path")' expression.
@@ -1177,9 +1179,9 @@ static bool EvaluateHasIncludeNext(Token &Tok,
   // issue a diagnostic.
   const DirectoryLookup *Lookup = PP.GetCurDirLookup();
   if (PP.isInPrimaryFile()) {
-    Lookup = 0;
+    Lookup = nullptr;
     PP.Diag(Tok, diag::pp_include_next_in_primary);
-  } else if (Lookup == 0) {
+  } else if (!Lookup) {
     PP.Diag(Tok, diag::pp_include_next_absolute_path);
   } else {
     // Start looking up in the next directory.
@@ -1252,7 +1254,7 @@ void Preprocessor::ExpandBuiltinMacro(Token &Tok) {
   llvm::raw_svector_ostream OS(TmpBuffer);
 
   // Set up the return result.
-  Tok.setIdentifierInfo(0);
+  Tok.setIdentifierInfo(nullptr);
   Tok.clearFlag(Token::NeedsCleaning);
 
   if (II == Ident__LINE__) {
@@ -1341,7 +1343,7 @@ void Preprocessor::ExpandBuiltinMacro(Token &Tok) {
 
     // Get the file that we are lexing out of.  If we're currently lexing from
     // a macro, dig into the include stack.
-    const FileEntry *CurFile = 0;
+    const FileEntry *CurFile = nullptr;
     PreprocessorLexer *TheLexer = getCurrentFileLexer();
 
     if (TheLexer)
@@ -1371,7 +1373,7 @@ void Preprocessor::ExpandBuiltinMacro(Token &Tok) {
     SourceLocation StartLoc = Tok.getLocation();
 
     bool IsValid = false;
-    IdentifierInfo *FeatureII = 0;
+    IdentifierInfo *FeatureII = nullptr;
 
     // Read the '('.
     LexUnexpandedToken(Tok);