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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
//===--- FormatTokenLexer.h - Format C++ code ----------------*- 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file contains FormatTokenLexer, which tokenizes a source file
/// into a token stream suitable for ClangFormat.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_FORMAT_FORMATTOKENLEXER_H
#define LLVM_CLANG_LIB_FORMAT_FORMATTOKENLEXER_H
#include "Encoding.h"
#include "FormatToken.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Format/Format.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/Support/Regex.h"
#include <stack>
namespace clang {
namespace format {
enum LexerState {
NORMAL,
TEMPLATE_STRING,
TOKEN_STASHED,
};
class FormatTokenLexer {
public:
FormatTokenLexer(const SourceManager &SourceMgr, FileID ID, unsigned Column,
const FormatStyle &Style, encoding::Encoding Encoding,
llvm::SpecificBumpPtrAllocator<FormatToken> &Allocator,
IdentifierTable &IdentTable);
ArrayRef<FormatToken *> lex();
const AdditionalKeywords &getKeywords() { return Keywords; }
private:
void tryMergePreviousTokens();
bool tryMergeLessLess();
bool tryMergeNSStringLiteral();
bool tryMergeJSPrivateIdentifier();
bool tryMergeCSharpStringLiteral();
bool tryMergeCSharpKeywordVariables();
bool tryMergeNullishCoalescingEqual();
bool tryTransformCSharpForEach();
bool tryMergeForEach();
bool tryTransformTryUsageForC();
bool tryMergeTokens(ArrayRef<tok::TokenKind> Kinds, TokenType NewType);
// Returns \c true if \p Tok can only be followed by an operand in JavaScript.
bool precedesOperand(FormatToken *Tok);
bool canPrecedeRegexLiteral(FormatToken *Prev);
// Tries to parse a JavaScript Regex literal starting at the current token,
// if that begins with a slash and is in a location where JavaScript allows
// regex literals. Changes the current token to a regex literal and updates
// its text if successful.
void tryParseJSRegexLiteral();
// Handles JavaScript template strings.
//
// JavaScript template strings use backticks ('`') as delimiters, and allow
// embedding expressions nested in ${expr-here}. Template strings can be
// nested recursively, i.e. expressions can contain template strings in turn.
//
// The code below parses starting from a backtick, up to a closing backtick or
// an opening ${. It also maintains a stack of lexing contexts to handle
// nested template parts by balancing curly braces.
void handleTemplateStrings();
void handleCSharpVerbatimAndInterpolatedStrings();
void tryParsePythonComment();
bool tryMerge_TMacro();
bool tryMergeConflictMarkers();
void truncateToken(size_t NewLen);
FormatToken *getStashedToken();
FormatToken *getNextToken();
FormatToken *FormatTok;
bool IsFirstToken;
std::stack<LexerState> StateStack;
unsigned Column;
unsigned TrailingWhitespace;
std::unique_ptr<Lexer> Lex;
LangOptions LangOpts;
const SourceManager &SourceMgr;
FileID ID;
const FormatStyle &Style;
IdentifierTable &IdentTable;
AdditionalKeywords Keywords;
encoding::Encoding Encoding;
llvm::SpecificBumpPtrAllocator<FormatToken> &Allocator;
// Index (in 'Tokens') of the last token that starts a new line.
unsigned FirstInLineIndex;
SmallVector<FormatToken *, 16> Tokens;
llvm::SmallMapVector<IdentifierInfo *, TokenType, 8> Macros;
bool FormattingDisabled;
llvm::Regex MacroBlockBeginRegex;
llvm::Regex MacroBlockEndRegex;
// Targets that may appear inside a C# attribute.
static const llvm::StringSet<> CSharpAttributeTargets;
/// Handle Verilog-specific tokens.
bool readRawTokenVerilogSpecific(Token &Tok);
void readRawToken(FormatToken &Tok);
void resetLexer(unsigned Offset);
};
} // namespace format
} // namespace clang
#endif
|
