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
141
142
|
//===--- RAIIObjectsForParser.h - RAII helpers for the parser ---*- 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 and implements the some simple RAII objects that are used
// by the parser to manage bits in recursion.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_PARSE_RAII_OBJECTS_FOR_PARSER_H
#define LLVM_CLANG_PARSE_RAII_OBJECTS_FOR_PARSER_H
#include "clang/Parse/ParseDiagnostic.h"
namespace clang {
// TODO: move ParsingDeclRAIIObject here.
// TODO: move ParsingClassDefinition here.
// TODO: move TentativeParsingAction here.
/// ExtensionRAIIObject - This saves the state of extension warnings when
/// constructed and disables them. When destructed, it restores them back to
/// the way they used to be. This is used to handle __extension__ in the
/// parser.
class ExtensionRAIIObject {
void operator=(const ExtensionRAIIObject &); // DO NOT IMPLEMENT
ExtensionRAIIObject(const ExtensionRAIIObject&); // DO NOT IMPLEMENT
DiagnosticsEngine &Diags;
public:
ExtensionRAIIObject(DiagnosticsEngine &diags) : Diags(diags) {
Diags.IncrementAllExtensionsSilenced();
}
~ExtensionRAIIObject() {
Diags.DecrementAllExtensionsSilenced();
}
};
/// ColonProtectionRAIIObject - This sets the Parser::ColonIsSacred bool and
/// restores it when destroyed. This says that "foo:" should not be
/// considered a possible typo for "foo::" for error recovery purposes.
class ColonProtectionRAIIObject {
Parser &P;
bool OldVal;
public:
ColonProtectionRAIIObject(Parser &p, bool Value = true)
: P(p), OldVal(P.ColonIsSacred) {
P.ColonIsSacred = Value;
}
/// restore - This can be used to restore the state early, before the dtor
/// is run.
void restore() {
P.ColonIsSacred = OldVal;
}
~ColonProtectionRAIIObject() {
restore();
}
};
/// \brief RAII object that makes '>' behave either as an operator
/// or as the closing angle bracket for a template argument list.
class GreaterThanIsOperatorScope {
bool &GreaterThanIsOperator;
bool OldGreaterThanIsOperator;
public:
GreaterThanIsOperatorScope(bool >IO, bool Val)
: GreaterThanIsOperator(GTIO), OldGreaterThanIsOperator(GTIO) {
GreaterThanIsOperator = Val;
}
~GreaterThanIsOperatorScope() {
GreaterThanIsOperator = OldGreaterThanIsOperator;
}
};
class InMessageExpressionRAIIObject {
bool &InMessageExpression;
bool OldValue;
public:
InMessageExpressionRAIIObject(Parser &P, bool Value)
: InMessageExpression(P.InMessageExpression),
OldValue(P.InMessageExpression) {
InMessageExpression = Value;
}
~InMessageExpressionRAIIObject() {
InMessageExpression = OldValue;
}
};
/// \brief RAII object that makes sure paren/bracket/brace count is correct
/// after declaration/statement parsing, even when there's a parsing error.
class ParenBraceBracketBalancer {
Parser &P;
unsigned short ParenCount, BracketCount, BraceCount;
public:
ParenBraceBracketBalancer(Parser &p)
: P(p), ParenCount(p.ParenCount), BracketCount(p.BracketCount),
BraceCount(p.BraceCount) { }
~ParenBraceBracketBalancer() {
P.ParenCount = ParenCount;
P.BracketCount = BracketCount;
P.BraceCount = BraceCount;
}
};
class PoisonSEHIdentifiersRAIIObject {
PoisonIdentifierRAIIObject Ident_AbnormalTermination;
PoisonIdentifierRAIIObject Ident_GetExceptionCode;
PoisonIdentifierRAIIObject Ident_GetExceptionInfo;
PoisonIdentifierRAIIObject Ident__abnormal_termination;
PoisonIdentifierRAIIObject Ident__exception_code;
PoisonIdentifierRAIIObject Ident__exception_info;
PoisonIdentifierRAIIObject Ident___abnormal_termination;
PoisonIdentifierRAIIObject Ident___exception_code;
PoisonIdentifierRAIIObject Ident___exception_info;
public:
PoisonSEHIdentifiersRAIIObject(Parser &Self, bool NewValue)
: Ident_AbnormalTermination(Self.Ident_AbnormalTermination, NewValue),
Ident_GetExceptionCode(Self.Ident_GetExceptionCode, NewValue),
Ident_GetExceptionInfo(Self.Ident_GetExceptionInfo, NewValue),
Ident__abnormal_termination(Self.Ident__abnormal_termination, NewValue),
Ident__exception_code(Self.Ident__exception_code, NewValue),
Ident__exception_info(Self.Ident__exception_info, NewValue),
Ident___abnormal_termination(Self.Ident___abnormal_termination, NewValue),
Ident___exception_code(Self.Ident___exception_code, NewValue),
Ident___exception_info(Self.Ident___exception_info, NewValue) {
}
};
} // end namespace clang
#endif
|
