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
|
#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===- StmtIterator.h - Iterators for Statements ----------------*- 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 StmtIterator and ConstStmtIterator classes.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_STMTITERATOR_H
#define LLVM_CLANG_AST_STMTITERATOR_H
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <iterator>
namespace clang {
class Decl;
class Stmt;
class VariableArrayType;
class StmtIteratorBase {
protected:
enum {
StmtMode = 0x0,
SizeOfTypeVAMode = 0x1,
DeclGroupMode = 0x2,
Flags = 0x3
};
union {
Stmt **stmt;
Decl **DGI;
};
uintptr_t RawVAPtr = 0;
Decl **DGE;
StmtIteratorBase(Stmt **s) : stmt(s) {}
StmtIteratorBase(const VariableArrayType *t);
StmtIteratorBase(Decl **dgi, Decl **dge);
StmtIteratorBase() : stmt(nullptr) {}
bool inDeclGroup() const {
return (RawVAPtr & Flags) == DeclGroupMode;
}
bool inSizeOfTypeVA() const {
return (RawVAPtr & Flags) == SizeOfTypeVAMode;
}
bool inStmt() const {
return (RawVAPtr & Flags) == StmtMode;
}
const VariableArrayType *getVAPtr() const {
return reinterpret_cast<const VariableArrayType*>(RawVAPtr & ~Flags);
}
void setVAPtr(const VariableArrayType *P) {
assert(inDeclGroup() || inSizeOfTypeVA());
RawVAPtr = reinterpret_cast<uintptr_t>(P) | (RawVAPtr & Flags);
}
void NextDecl(bool ImmediateAdvance = true);
bool HandleDecl(Decl* D);
void NextVA();
Stmt*& GetDeclExpr() const;
};
template <typename DERIVED, typename REFERENCE>
class StmtIteratorImpl : public StmtIteratorBase {
protected:
StmtIteratorImpl(const StmtIteratorBase& RHS) : StmtIteratorBase(RHS) {}
public:
using iterator_category = std::forward_iterator_tag;
using value_type = REFERENCE;
using difference_type = std::ptrdiff_t;
using pointer = REFERENCE;
using reference = REFERENCE;
StmtIteratorImpl() = default;
StmtIteratorImpl(Stmt **s) : StmtIteratorBase(s) {}
StmtIteratorImpl(Decl **dgi, Decl **dge) : StmtIteratorBase(dgi, dge) {}
StmtIteratorImpl(const VariableArrayType *t) : StmtIteratorBase(t) {}
DERIVED& operator++() {
if (inStmt())
++stmt;
else if (getVAPtr())
NextVA();
else
NextDecl();
return static_cast<DERIVED&>(*this);
}
DERIVED operator++(int) {
DERIVED tmp = static_cast<DERIVED&>(*this);
operator++();
return tmp;
}
friend bool operator==(const DERIVED &LHS, const DERIVED &RHS) {
return LHS.stmt == RHS.stmt && LHS.DGI == RHS.DGI &&
LHS.RawVAPtr == RHS.RawVAPtr;
}
friend bool operator!=(const DERIVED &LHS, const DERIVED &RHS) {
return !(LHS == RHS);
}
REFERENCE operator*() const {
return inStmt() ? *stmt : GetDeclExpr();
}
REFERENCE operator->() const { return operator*(); }
};
struct ConstStmtIterator;
struct StmtIterator : public StmtIteratorImpl<StmtIterator, Stmt*&> {
explicit StmtIterator() = default;
StmtIterator(Stmt** S) : StmtIteratorImpl<StmtIterator, Stmt*&>(S) {}
StmtIterator(Decl** dgi, Decl** dge)
: StmtIteratorImpl<StmtIterator, Stmt*&>(dgi, dge) {}
StmtIterator(const VariableArrayType *t)
: StmtIteratorImpl<StmtIterator, Stmt*&>(t) {}
private:
StmtIterator(const StmtIteratorBase &RHS)
: StmtIteratorImpl<StmtIterator, Stmt *&>(RHS) {}
inline friend StmtIterator
cast_away_const(const ConstStmtIterator &RHS);
};
struct ConstStmtIterator : public StmtIteratorImpl<ConstStmtIterator,
const Stmt*> {
explicit ConstStmtIterator() = default;
ConstStmtIterator(const StmtIterator& RHS)
: StmtIteratorImpl<ConstStmtIterator, const Stmt*>(RHS) {}
ConstStmtIterator(Stmt * const *S)
: StmtIteratorImpl<ConstStmtIterator, const Stmt *>(
const_cast<Stmt **>(S)) {}
};
inline StmtIterator cast_away_const(const ConstStmtIterator &RHS) {
return RHS;
}
} // namespace clang
#endif // LLVM_CLANG_AST_STMTITERATOR_H
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
|
