1//===- PreprocessorLexer.cpp - C Language Family Lexer --------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9//  This file implements the PreprocessorLexer and Token interfaces.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/Lex/PreprocessorLexer.h"
14#include "clang/Basic/SourceManager.h"
15#include "clang/Lex/LexDiagnostic.h"
16#include "clang/Lex/Preprocessor.h"
17#include "clang/Lex/Token.h"
18#include <cassert>
19
20using namespace clang;
21
22void PreprocessorLexer::anchor() {}
23
24PreprocessorLexer::PreprocessorLexer(Preprocessor *pp, FileID fid)
25    : PP(pp), FID(fid) {
26  if (pp)
27    InitialNumSLocEntries = pp->getSourceManager().local_sloc_entry_size();
28}
29
30/// After the preprocessor has parsed a \#include, lex and
31/// (potentially) macro expand the filename.
32void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {
33  assert(ParsingFilename == false && "reentered LexIncludeFilename");
34
35  // We are now parsing a filename!
36  ParsingFilename = true;
37
38  // Lex the filename.
39  if (LexingRawMode)
40    IndirectLex(FilenameTok);
41  else
42    PP->Lex(FilenameTok);
43
44  // We should have obtained the filename now.
45  ParsingFilename = false;
46}
47
48/// getFileEntry - Return the FileEntry corresponding to this FileID.  Like
49/// getFileID(), this only works for lexers with attached preprocessors.
50const FileEntry *PreprocessorLexer::getFileEntry() const {
51  return PP->getSourceManager().getFileEntryForID(getFileID());
52}
53