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
|
//===--- tools/extra/clang-rename/USRLocFinder.cpp - Clang rename tool ----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief Mehtods for finding all instances of a USR. Our strategy is very
/// simple; we just compare the USR at every relevant AST node with the one
/// provided.
///
//===----------------------------------------------------------------------===//
#include "USRLocFinder.h"
#include "USRFinder.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Lex/Lexer.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Casting.h"
#include <cstddef>
#include <set>
#include <string>
#include <vector>
using namespace llvm;
namespace clang {
namespace rename {
namespace {
// \brief This visitor recursively searches for all instances of a USR in a
// translation unit and stores them for later usage.
class USRLocFindingASTVisitor
: public clang::RecursiveASTVisitor<USRLocFindingASTVisitor> {
public:
explicit USRLocFindingASTVisitor(const std::vector<std::string> &USRs,
StringRef PrevName,
const ASTContext &Context)
: USRSet(USRs.begin(), USRs.end()), PrevName(PrevName), Context(Context) {
}
// Declaration visitors:
bool VisitCXXConstructorDecl(clang::CXXConstructorDecl *ConstructorDecl) {
for (const auto *Initializer : ConstructorDecl->inits()) {
// Ignore implicit initializers.
if (!Initializer->isWritten())
continue;
if (const clang::FieldDecl *FieldDecl = Initializer->getMember()) {
if (USRSet.find(getUSRForDecl(FieldDecl)) != USRSet.end())
LocationsFound.push_back(Initializer->getSourceLocation());
}
}
return true;
}
bool VisitNamedDecl(const NamedDecl *Decl) {
if (USRSet.find(getUSRForDecl(Decl)) != USRSet.end())
checkAndAddLocation(Decl->getLocation());
return true;
}
// Expression visitors:
bool VisitDeclRefExpr(const DeclRefExpr *Expr) {
const NamedDecl *Decl = Expr->getFoundDecl();
if (USRSet.find(getUSRForDecl(Decl)) != USRSet.end()) {
const SourceManager &Manager = Decl->getASTContext().getSourceManager();
SourceLocation Location = Manager.getSpellingLoc(Expr->getLocation());
checkAndAddLocation(Location);
}
return true;
}
bool VisitMemberExpr(const MemberExpr *Expr) {
const NamedDecl *Decl = Expr->getFoundDecl().getDecl();
if (USRSet.find(getUSRForDecl(Decl)) != USRSet.end()) {
const SourceManager &Manager = Decl->getASTContext().getSourceManager();
SourceLocation Location = Manager.getSpellingLoc(Expr->getMemberLoc());
checkAndAddLocation(Location);
}
return true;
}
// Other visitors:
bool VisitTypeLoc(const TypeLoc Loc) {
if (USRSet.find(getUSRForDecl(Loc.getType()->getAsCXXRecordDecl())) !=
USRSet.end())
checkAndAddLocation(Loc.getBeginLoc());
if (const auto *TemplateTypeParm =
dyn_cast<TemplateTypeParmType>(Loc.getType())) {
if (USRSet.find(getUSRForDecl(TemplateTypeParm->getDecl())) !=
USRSet.end())
checkAndAddLocation(Loc.getBeginLoc());
}
return true;
}
// Non-visitors:
// \brief Returns a list of unique locations. Duplicate or overlapping
// locations are erroneous and should be reported!
const std::vector<clang::SourceLocation> &getLocationsFound() const {
return LocationsFound;
}
// Namespace traversal:
void handleNestedNameSpecifierLoc(NestedNameSpecifierLoc NameLoc) {
while (NameLoc) {
const NamespaceDecl *Decl =
NameLoc.getNestedNameSpecifier()->getAsNamespace();
if (Decl && USRSet.find(getUSRForDecl(Decl)) != USRSet.end())
checkAndAddLocation(NameLoc.getLocalBeginLoc());
NameLoc = NameLoc.getPrefix();
}
}
private:
void checkAndAddLocation(SourceLocation Loc) {
const SourceLocation BeginLoc = Loc;
const SourceLocation EndLoc = Lexer::getLocForEndOfToken(
BeginLoc, 0, Context.getSourceManager(), Context.getLangOpts());
StringRef TokenName =
Lexer::getSourceText(CharSourceRange::getTokenRange(BeginLoc, EndLoc),
Context.getSourceManager(), Context.getLangOpts());
size_t Offset = TokenName.find(PrevName);
// The token of the source location we find actually has the old
// name.
if (Offset != StringRef::npos)
LocationsFound.push_back(BeginLoc.getLocWithOffset(Offset));
}
const std::set<std::string> USRSet;
const std::string PrevName;
std::vector<clang::SourceLocation> LocationsFound;
const ASTContext &Context;
};
} // namespace
std::vector<SourceLocation>
getLocationsOfUSRs(const std::vector<std::string> &USRs, StringRef PrevName,
Decl *Decl) {
USRLocFindingASTVisitor Visitor(USRs, PrevName, Decl->getASTContext());
Visitor.TraverseDecl(Decl);
NestedNameSpecifierLocFinder Finder(Decl->getASTContext());
for (const auto &Location : Finder.getNestedNameSpecifierLocations())
Visitor.handleNestedNameSpecifierLoc(Location);
return Visitor.getLocationsFound();
}
} // namespace rename
} // namespace clang
|
