Revert "[clang-format][NFC] Make LangOpts global in namespace Format"

This reverts commit 32e65b0.

It seems to break some PowerPC bots.

See #81390 (comment).

Author: owenca

clang/lib/Format/FormatTokenLexer.cpp

@@ -13,7 +13,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "FormatTokenLexer.h"
-#include "TokenAnalyzer.h"
+#include "FormatToken.h"
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Format/Format.h"
+#include "llvm/Support/Regex.h"
 
 namespace clang {
 namespace format {
@@ -24,12 +28,12 @@ FormatTokenLexer::FormatTokenLexer(
     llvm::SpecificBumpPtrAllocator<FormatToken> &Allocator,
     IdentifierTable &IdentTable)
     : FormatTok(nullptr), IsFirstToken(true), StateStack({LexerState::NORMAL}),
-      Column(Column), TrailingWhitespace(0), SourceMgr(SourceMgr), ID(ID),
+      Column(Column), TrailingWhitespace(0),
+      LangOpts(getFormattingLangOpts(Style)), SourceMgr(SourceMgr), ID(ID),
       Style(Style), IdentTable(IdentTable), Keywords(IdentTable),
       Encoding(Encoding), Allocator(Allocator), FirstInLineIndex(0),
       FormattingDisabled(false), MacroBlockBeginRegex(Style.MacroBlockBegin),
       MacroBlockEndRegex(Style.MacroBlockEnd) {
-  assert(LangOpts.CPlusPlus);
   Lex.reset(new Lexer(ID, SourceMgr.getBufferOrFake(ID), SourceMgr, LangOpts));
   Lex->SetKeepWhitespaceMode(true);
 
@@ -1438,7 +1442,7 @@ void FormatTokenLexer::readRawToken(FormatToken &Tok) {
 
 void FormatTokenLexer::resetLexer(unsigned Offset) {
   StringRef Buffer = SourceMgr.getBufferData(ID);
-  assert(LangOpts.CPlusPlus);
+  LangOpts = getFormattingLangOpts(Style);
   Lex.reset(new Lexer(SourceMgr.getLocForStartOfFile(ID), LangOpts,
                       Buffer.begin(), Buffer.begin() + Offset, Buffer.end()));
   Lex->SetKeepWhitespaceMode(true);

clang/lib/Format/FormatTokenLexer.h

@@ -17,9 +17,14 @@
 
 #include "Encoding.h"
 #include "FormatToken.h"
+#include "clang/Basic/LangOptions.h"
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Format/Format.h"
 #include "llvm/ADT/MapVector.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/StringSet.h"
+#include "llvm/Support/Regex.h"
 
 #include <stack>
 
@@ -115,6 +120,7 @@ class FormatTokenLexer {
   unsigned Column;
   unsigned TrailingWhitespace;
   std::unique_ptr<Lexer> Lex;
+  LangOptions LangOpts;
   const SourceManager &SourceMgr;
   FileID ID;
   const FormatStyle &Style;

clang/lib/Format/IntegerLiteralSeparatorFixer.cpp

@@ -79,7 +79,7 @@ IntegerLiteralSeparatorFixer::process(const Environment &Env,
   AffectedRangeManager AffectedRangeMgr(SourceMgr, Env.getCharRanges());
 
   const auto ID = Env.getFileID();
-  assert(LangOpts.CPlusPlus);
+  const auto LangOpts = getFormattingLangOpts(Style);
   Lexer Lex(ID, SourceMgr.getBufferOrFake(ID), SourceMgr, LangOpts);
   Lex.SetCommentRetentionState(true);
 

clang/lib/Format/TokenAnalyzer.cpp

@@ -35,8 +35,6 @@
 namespace clang {
 namespace format {
 
-LangOptions LangOpts;
-
 // FIXME: Instead of printing the diagnostic we should store it and have a
 // better way to return errors through the format APIs.
 class FatalDiagnosticConsumer : public DiagnosticConsumer {
@@ -101,11 +99,9 @@ TokenAnalyzer::TokenAnalyzer(const Environment &Env, const FormatStyle &Style)
 
 std::pair<tooling::Replacements, unsigned>
 TokenAnalyzer::process(bool SkipAnnotation) {
-  LangOpts = getFormattingLangOpts(Style);
-
   tooling::Replacements Result;
   llvm::SpecificBumpPtrAllocator<FormatToken> Allocator;
-  IdentifierTable IdentTable(LangOpts);
+  IdentifierTable IdentTable(getFormattingLangOpts(Style));
   FormatTokenLexer Lex(Env.getSourceManager(), Env.getFileID(),
                        Env.getFirstStartColumn(), Style, Encoding, Allocator,
                        IdentTable);

clang/lib/Format/TokenAnalyzer.h

@@ -34,8 +34,6 @@
 namespace clang {
 namespace format {
 
-extern LangOptions LangOpts;
-
 class Environment {
 public:
   // This sets up an virtual file system with file \p FileName containing the