PTHLexer.h revision 274b20863a728cc6a31ee75c670e3733600c1531 
1//===--- PTHLexer.h - Lexer based on Pre-tokenized input --------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines the PTHLexer interface.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_CLANG_PTHLexer_H
15#define LLVM_CLANG_PTHLexer_H
16
17#include "clang/Lex/PreprocessorLexer.h"
18
19namespace clang {
20
21class PTHLexer : public PreprocessorLexer {
22
23  /// PP - Preprocessor.
24  Preprocessor& PP;
25
26  /// FileLoc - Location for the start of the file.
27  ///
28  SourceLocation FileLoc;
29
30  /// Tokens - This is the pointer to an array of tokens that the macro is
31  /// defined to, with arguments expanded for function-like macros.  If this is
32  /// a token stream, these are the tokens we are returning.
33  const Token *Tokens;
34
35  /// NumTokens - This is the length of the Tokens array.
36  ///
37  unsigned NumTokens;
38
39  /// CurToken - This is the next token that Lex will return.
40  ///
41  unsigned CurToken;
42
43  PTHLexer(const PTHLexer&);  // DO NOT IMPLEMENT
44  void operator=(const PTHLexer&); // DO NOT IMPLEMENT
45
46public:
47
48  /// Create a PTHLexer for the specified token stream.
49  PTHLexer(Preprocessor& pp, SourceLocation fileloc,
50           const Token *TokArray, unsigned NumToks);
51  ~PTHLexer() {}
52
53  /// Lex - Return the next token.
54  void Lex(Token &Tok);
55
56  void setEOF(Token &Tok);
57
58  /// getFileLoc - Return the File Location for the file we are lexing out of.
59  /// The physical location encodes the location where the characters come from,
60  /// the virtual location encodes where we should *claim* the characters came
61  /// from.  Currently this is only used by _Pragma handling.
62  SourceLocation getFileLoc() const { return FileLoc; }
63};
64
65}  // end namespace clang
66
67#endif
68