//===- PreprocessorLexer.cpp - C Language Family Lexer --------------------===//

//

// 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

//

//===----------------------------------------------------------------------===//

//

//  This file implements the PreprocessorLexer and Token interfaces.

//

//===----------------------------------------------------------------------===//

#include "clang/Lex/PreprocessorLexer.h"

#include "clang/Basic/SourceManager.h"

#include "clang/Lex/LexDiagnostic.h"

#include "clang/Lex/Preprocessor.h"

#include "clang/Lex/Token.h"

#include <cassert>

using namespace clang;

void PreprocessorLexer::anchor() {}

PreprocessorLexer::PreprocessorLexer(Preprocessor *pp, FileID fid)

    : PP(pp), FID(fid) {

  if (pp)

    InitialNumSLocEntries = pp->getSourceManager().local_sloc_entry_size();

}

/// After the preprocessor has parsed a \#include, lex and

/// (potentially) macro expand the filename.

void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {

  assert(ParsingFilename == false && "reentered LexIncludeFilename");

  // We are now parsing a filename!

  ParsingFilename = true;

  // Lex the filename.

  if (LexingRawMode)

    IndirectLex(FilenameTok);

  else

    PP->Lex(FilenameTok);

  // We should have obtained the filename now.

  ParsingFilename = false;

}

/// getFileEntry - Return the FileEntry corresponding to this FileID.  Like

/// getFileID(), this only works for lexers with attached preprocessors.

OptionalFileEntryRefDegradesToFileEntryPtr

PreprocessorLexer::getFileEntry() const {

  return PP->getSourceManager().getFileEntryRefForID(getFileID());

}