blob: f96af665b15748e647b12efc39eff90beda1d668 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
//===--- PTHLexer.h - Lexer based on Pre-tokenized input --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the PTHLexer interface.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LEX_PTHLEXER_H
#define LLVM_CLANG_LEX_PTHLEXER_H
#include "clang/Lex/PreprocessorLexer.h"
namespace clang {
class PTHManager;
class PTHSpellingSearch;
class PTHLexer : public PreprocessorLexer {
SourceLocation FileStartLoc;
/// TokBuf - Buffer from PTH file containing raw token data.
const unsigned char* TokBuf;
/// CurPtr - Pointer into current offset of the token buffer where
/// the next token will be read.
const unsigned char* CurPtr;
/// LastHashTokPtr - Pointer into TokBuf of the last processed '#'
/// token that appears at the start of a line.
const unsigned char* LastHashTokPtr;
/// PPCond - Pointer to a side table in the PTH file that provides a
/// a concise summary of the preprocessor conditional block structure.
/// This is used to perform quick skipping of conditional blocks.
const unsigned char* PPCond;
/// CurPPCondPtr - Pointer inside PPCond that refers to the next entry
/// to process when doing quick skipping of preprocessor blocks.
const unsigned char* CurPPCondPtr;
PTHLexer(const PTHLexer &) = delete;
void operator=(const PTHLexer &) = delete;
/// ReadToken - Used by PTHLexer to read tokens TokBuf.
void ReadToken(Token& T);
bool LexEndOfFile(Token &Result);
/// PTHMgr - The PTHManager object that created this PTHLexer.
PTHManager& PTHMgr;
Token EofToken;
protected:
friend class PTHManager;
/// Create a PTHLexer for the specified token stream.
PTHLexer(Preprocessor& pp, FileID FID, const unsigned char *D,
const unsigned char* ppcond, PTHManager &PM);
public:
~PTHLexer() override {}
/// Lex - Return the next token.
bool Lex(Token &Tok);
void getEOF(Token &Tok);
/// DiscardToEndOfLine - Read the rest of the current preprocessor line as an
/// uninterpreted string. This switches the lexer out of directive mode.
void DiscardToEndOfLine();
/// isNextPPTokenLParen - Return 1 if the next unexpanded token will return a
/// tok::l_paren token, 0 if it is something else and 2 if there are no more
/// tokens controlled by this lexer.
unsigned isNextPPTokenLParen() {
// isNextPPTokenLParen is not on the hot path, and all we care about is
// whether or not we are at a token with kind tok::eof or tok::l_paren.
// Just read the first byte from the current token pointer to determine
// its kind.
tok::TokenKind x = (tok::TokenKind)*CurPtr;
return x == tok::eof ? 2 : x == tok::l_paren;
}
/// IndirectLex - An indirect call to 'Lex' that can be invoked via
/// the PreprocessorLexer interface.
void IndirectLex(Token &Result) override { Lex(Result); }
/// getSourceLocation - Return a source location for the token in
/// the current file.
SourceLocation getSourceLocation() override;
/// SkipBlock - Used by Preprocessor to skip the current conditional block.
bool SkipBlock();
};
} // end namespace clang
#endif
|
