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
|
#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===- DeclGroup.h - Classes for representing groups of Decls ---*- 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 the DeclGroup, DeclGroupRef, and OwningDeclGroup classes.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_DECLGROUP_H
#define LLVM_CLANG_AST_DECLGROUP_H
#include "llvm/Support/TrailingObjects.h"
#include <cassert>
#include <cstdint>
namespace clang {
class ASTContext;
class Decl;
class DeclGroup final : private llvm::TrailingObjects<DeclGroup, Decl *> {
// FIXME: Include a TypeSpecifier object.
unsigned NumDecls = 0;
private:
DeclGroup() = default;
DeclGroup(unsigned numdecls, Decl** decls);
public:
friend TrailingObjects;
static DeclGroup *Create(ASTContext &C, Decl **Decls, unsigned NumDecls);
unsigned size() const { return NumDecls; }
Decl*& operator[](unsigned i) {
assert (i < NumDecls && "Out-of-bounds access.");
return getTrailingObjects<Decl *>()[i];
}
Decl* const& operator[](unsigned i) const {
assert (i < NumDecls && "Out-of-bounds access.");
return getTrailingObjects<Decl *>()[i];
}
};
class DeclGroupRef {
// Note this is not a PointerIntPair because we need the address of the
// non-group case to be valid as a Decl** for iteration.
enum Kind { SingleDeclKind=0x0, DeclGroupKind=0x1, Mask=0x1 };
Decl* D = nullptr;
Kind getKind() const {
return (Kind) (reinterpret_cast<uintptr_t>(D) & Mask);
}
public:
DeclGroupRef() = default;
explicit DeclGroupRef(Decl* d) : D(d) {}
explicit DeclGroupRef(DeclGroup* dg)
: D((Decl*) (reinterpret_cast<uintptr_t>(dg) | DeclGroupKind)) {}
static DeclGroupRef Create(ASTContext &C, Decl **Decls, unsigned NumDecls) {
if (NumDecls == 0)
return DeclGroupRef();
if (NumDecls == 1)
return DeclGroupRef(Decls[0]);
return DeclGroupRef(DeclGroup::Create(C, Decls, NumDecls));
}
using iterator = Decl **;
using const_iterator = Decl * const *;
bool isNull() const { return D == nullptr; }
bool isSingleDecl() const { return getKind() == SingleDeclKind; }
bool isDeclGroup() const { return getKind() == DeclGroupKind; }
Decl *getSingleDecl() {
assert(isSingleDecl() && "Isn't a single decl");
return D;
}
const Decl *getSingleDecl() const {
return const_cast<DeclGroupRef*>(this)->getSingleDecl();
}
DeclGroup &getDeclGroup() {
assert(isDeclGroup() && "Isn't a declgroup");
return *((DeclGroup*)(reinterpret_cast<uintptr_t>(D) & ~Mask));
}
const DeclGroup &getDeclGroup() const {
return const_cast<DeclGroupRef*>(this)->getDeclGroup();
}
iterator begin() {
if (isSingleDecl())
return D ? &D : nullptr;
return &getDeclGroup()[0];
}
iterator end() {
if (isSingleDecl())
return D ? &D+1 : nullptr;
DeclGroup &G = getDeclGroup();
return &G[0] + G.size();
}
const_iterator begin() const {
if (isSingleDecl())
return D ? &D : nullptr;
return &getDeclGroup()[0];
}
const_iterator end() const {
if (isSingleDecl())
return D ? &D+1 : nullptr;
const DeclGroup &G = getDeclGroup();
return &G[0] + G.size();
}
void *getAsOpaquePtr() const { return D; }
static DeclGroupRef getFromOpaquePtr(void *Ptr) {
DeclGroupRef X;
X.D = static_cast<Decl*>(Ptr);
return X;
}
};
} // namespace clang
namespace llvm {
// DeclGroupRef is "like a pointer", implement PointerLikeTypeTraits.
template <typename T>
struct PointerLikeTypeTraits;
template <>
struct PointerLikeTypeTraits<clang::DeclGroupRef> {
static inline void *getAsVoidPointer(clang::DeclGroupRef P) {
return P.getAsOpaquePtr();
}
static inline clang::DeclGroupRef getFromVoidPointer(void *P) {
return clang::DeclGroupRef::getFromOpaquePtr(P);
}
static constexpr int NumLowBitsAvailable = 0;
};
} // namespace llvm
#endif // LLVM_CLANG_AST_DECLGROUP_H
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
|
