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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===--- Designator.h - Initialization Designator ---------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file defines interfaces used to represent designators (a la
// C99 designated initializers) during parsing.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_SEMA_DESIGNATOR_H
#define LLVM_CLANG_SEMA_DESIGNATOR_H
#include "clang/Basic/SourceLocation.h"
#include "llvm/ADT/SmallVector.h"
namespace clang {
class Expr;
class IdentifierInfo;
class Sema;
/// Designator - A designator in a C99 designated initializer.
///
/// This class is a discriminated union which holds the various
/// different sorts of designators possible. A Designation is an array of
/// these. An example of a designator are things like this:
/// [8] .field [47] // C99 designation: 3 designators
/// [8 ... 47] field: // GNU extensions: 2 designators
/// These occur in initializers, e.g.:
/// int a[10] = {2, 4, [8]=9, 10};
///
class Designator {
public:
enum DesignatorKind {
FieldDesignator, ArrayDesignator, ArrayRangeDesignator
};
private:
Designator() {};
DesignatorKind Kind;
struct FieldDesignatorInfo {
const IdentifierInfo *II;
SourceLocation DotLoc;
SourceLocation NameLoc;
};
struct ArrayDesignatorInfo {
Expr *Index;
SourceLocation LBracketLoc;
mutable SourceLocation RBracketLoc;
};
struct ArrayRangeDesignatorInfo {
Expr *Start, *End;
SourceLocation LBracketLoc, EllipsisLoc;
mutable SourceLocation RBracketLoc;
};
union {
FieldDesignatorInfo FieldInfo;
ArrayDesignatorInfo ArrayInfo;
ArrayRangeDesignatorInfo ArrayRangeInfo;
};
public:
DesignatorKind getKind() const { return Kind; }
bool isFieldDesignator() const { return Kind == FieldDesignator; }
bool isArrayDesignator() const { return Kind == ArrayDesignator; }
bool isArrayRangeDesignator() const { return Kind == ArrayRangeDesignator; }
const IdentifierInfo *getField() const {
assert(isFieldDesignator() && "Invalid accessor");
return FieldInfo.II;
}
SourceLocation getDotLoc() const {
assert(isFieldDesignator() && "Invalid accessor");
return FieldInfo.DotLoc;
}
SourceLocation getFieldLoc() const {
assert(isFieldDesignator() && "Invalid accessor");
return FieldInfo.NameLoc;
}
Expr *getArrayIndex() const {
assert(isArrayDesignator() && "Invalid accessor");
return ArrayInfo.Index;
}
Expr *getArrayRangeStart() const {
assert(isArrayRangeDesignator() && "Invalid accessor");
return ArrayRangeInfo.Start;
}
Expr *getArrayRangeEnd() const {
assert(isArrayRangeDesignator() && "Invalid accessor");
return ArrayRangeInfo.End;
}
SourceLocation getLBracketLoc() const {
assert((isArrayDesignator() || isArrayRangeDesignator()) &&
"Invalid accessor");
if (isArrayDesignator())
return ArrayInfo.LBracketLoc;
else
return ArrayRangeInfo.LBracketLoc;
}
SourceLocation getRBracketLoc() const {
assert((isArrayDesignator() || isArrayRangeDesignator()) &&
"Invalid accessor");
if (isArrayDesignator())
return ArrayInfo.RBracketLoc;
else
return ArrayRangeInfo.RBracketLoc;
}
SourceLocation getEllipsisLoc() const {
assert(isArrayRangeDesignator() && "Invalid accessor");
return ArrayRangeInfo.EllipsisLoc;
}
static Designator getField(const IdentifierInfo *II, SourceLocation DotLoc,
SourceLocation NameLoc) {
Designator D;
D.Kind = FieldDesignator;
new (&D.FieldInfo) FieldDesignatorInfo;
D.FieldInfo.II = II;
D.FieldInfo.DotLoc = DotLoc;
D.FieldInfo.NameLoc = NameLoc;
return D;
}
static Designator getArray(Expr *Index,
SourceLocation LBracketLoc) {
Designator D;
D.Kind = ArrayDesignator;
new (&D.ArrayInfo) ArrayDesignatorInfo;
D.ArrayInfo.Index = Index;
D.ArrayInfo.LBracketLoc = LBracketLoc;
D.ArrayInfo.RBracketLoc = SourceLocation();
return D;
}
static Designator getArrayRange(Expr *Start,
Expr *End,
SourceLocation LBracketLoc,
SourceLocation EllipsisLoc) {
Designator D;
D.Kind = ArrayRangeDesignator;
new (&D.ArrayRangeInfo) ArrayRangeDesignatorInfo;
D.ArrayRangeInfo.Start = Start;
D.ArrayRangeInfo.End = End;
D.ArrayRangeInfo.LBracketLoc = LBracketLoc;
D.ArrayRangeInfo.EllipsisLoc = EllipsisLoc;
D.ArrayRangeInfo.RBracketLoc = SourceLocation();
return D;
}
void setRBracketLoc(SourceLocation RBracketLoc) const {
assert((isArrayDesignator() || isArrayRangeDesignator()) &&
"Invalid accessor");
if (isArrayDesignator())
ArrayInfo.RBracketLoc = RBracketLoc;
else
ArrayRangeInfo.RBracketLoc = RBracketLoc;
}
/// ClearExprs - Null out any expression references, which prevents
/// them from being 'delete'd later.
void ClearExprs(Sema &Actions) {}
/// FreeExprs - Release any unclaimed memory for the expressions in
/// this designator.
void FreeExprs(Sema &Actions) {}
};
/// Designation - Represent a full designation, which is a sequence of
/// designators. This class is mostly a helper for InitListDesignations.
class Designation {
/// Designators - The actual designators for this initializer.
SmallVector<Designator, 2> Designators;
public:
/// AddDesignator - Add a designator to the end of this list.
void AddDesignator(Designator D) {
Designators.push_back(D);
}
bool empty() const { return Designators.empty(); }
unsigned getNumDesignators() const { return Designators.size(); }
const Designator &getDesignator(unsigned Idx) const {
assert(Idx < Designators.size());
return Designators[Idx];
}
/// ClearExprs - Null out any expression references, which prevents them from
/// being 'delete'd later.
void ClearExprs(Sema &Actions) {}
/// FreeExprs - Release any unclaimed memory for the expressions in this
/// designation.
void FreeExprs(Sema &Actions) {}
};
} // end namespace clang
#endif
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
|
