text: //===-- FindAllMacros.cpp - find all macros ---------------------*- C++ -*-===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  
  #include "FindAllMacros.h"
  #include "HeaderMapCollector.h"
  #include "PathConfig.h"
  #include "SymbolInfo.h"
  #include "clang/Basic/FileManager.h"
  #include "clang/Basic/IdentifierTable.h"
  #include "clang/Basic/SourceManager.h"
  #include "clang/Lex/MacroInfo.h"
  #include "clang/Lex/Token.h"
  #include "llvm/Support/Path.h"
  
  namespace clang {
  namespace find_all_symbols {
  
  llvm::Optional<SymbolInfo>
  FindAllMacros::CreateMacroSymbol(const Token &MacroNameTok,
                                   const MacroInfo *info) {
    std::string FilePath =
        getIncludePath(*SM, info->getDefinitionLoc(), Collector);
    if (FilePath.empty())
      return llvm::None;
    return SymbolInfo(MacroNameTok.getIdentifierInfo()->getName(),
                      SymbolInfo::SymbolKind::Macro, FilePath, {});
  }
  
  void FindAllMacros::MacroDefined(const Token &MacroNameTok,
                                   const MacroDirective *MD) {
    if (auto Symbol = CreateMacroSymbol(MacroNameTok, MD->getMacroInfo()))
      ++FileSymbols[*Symbol].Seen;
  }
  
  void FindAllMacros::MacroUsed(const Token &Name, const MacroDefinition &MD) {
    if (!MD || !SM->isInMainFile(SM->getExpansionLoc(Name.getLocation())))
      return;
    if (auto Symbol = CreateMacroSymbol(Name, MD.getMacroInfo()))
      ++FileSymbols[*Symbol].Used;
  }
  
  void FindAllMacros::MacroExpands(const Token &MacroNameTok,
                                   const MacroDefinition &MD, SourceRange Range,
                                   const MacroArgs *Args) {
    MacroUsed(MacroNameTok, MD);
  }
  
  void FindAllMacros::Ifdef(SourceLocation Loc, const Token &MacroNameTok,
                            const MacroDefinition &MD) {
    MacroUsed(MacroNameTok, MD);
  }
  
  void FindAllMacros::Ifndef(SourceLocation Loc, const Token &MacroNameTok,
                             const MacroDefinition &MD) {
    MacroUsed(MacroNameTok, MD);
  }
  
  void FindAllMacros::EndOfMainFile() {
    Reporter->reportSymbols(SM->getFileEntryForID(SM->getMainFileID())->getName(),
                            FileSymbols);
    FileSymbols.clear();
  }
  
  } // namespace find_all_symbols
  } // namespace clang
  