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
|
//===--- MakeSmartPtrCheck.cpp - clang-tidy--------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "MakeSharedCheck.h"
#include "clang/Lex/Lexer.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace modernize {
const char MakeSmartPtrCheck::PointerType[] = "pointerType";
const char MakeSmartPtrCheck::ConstructorCall[] = "constructorCall";
const char MakeSmartPtrCheck::NewExpression[] = "newExpression";
MakeSmartPtrCheck::MakeSmartPtrCheck(StringRef Name, ClangTidyContext *Context,
std::string makeSmartPtrFunctionName)
: ClangTidyCheck(Name, Context),
makeSmartPtrFunctionName(std::move(makeSmartPtrFunctionName)) {}
void MakeSmartPtrCheck::registerMatchers(ast_matchers::MatchFinder *Finder) {
if (!getLangOpts().CPlusPlus11)
return;
Finder->addMatcher(
cxxBindTemporaryExpr(
has(cxxConstructExpr(
hasType(getSmartPointerTypeMatcher()), argumentCountIs(1),
hasArgument(
0, cxxNewExpr(hasType(pointsTo(qualType(hasCanonicalType(
equalsBoundNode(PointerType))))))
.bind(NewExpression)))
.bind(ConstructorCall))),
this);
}
void MakeSmartPtrCheck::check(const MatchFinder::MatchResult &Result) {
// 'smart_ptr' refers to 'std::shared_ptr' or 'std::unique_ptr' or other
// pointer, 'make_smart_ptr' refers to 'std::make_shared' or
// 'std::make_unique' or other function that creates smart_ptr.
SourceManager &SM = *Result.SourceManager;
const auto *Construct =
Result.Nodes.getNodeAs<CXXConstructExpr>(ConstructorCall);
const auto *Type = Result.Nodes.getNodeAs<QualType>(PointerType);
const auto *New = Result.Nodes.getNodeAs<CXXNewExpr>(NewExpression);
if (New->getNumPlacementArgs() != 0)
return;
SourceLocation ConstructCallStart = Construct->getExprLoc();
bool Invalid = false;
StringRef ExprStr = Lexer::getSourceText(
CharSourceRange::getCharRange(
ConstructCallStart, Construct->getParenOrBraceRange().getBegin()),
SM, LangOptions(), &Invalid);
if (Invalid)
return;
auto Diag = diag(ConstructCallStart, "use %0 instead")
<< makeSmartPtrFunctionName;
// Find the location of the template's left angle.
size_t LAngle = ExprStr.find("<");
SourceLocation ConstructCallEnd;
if (LAngle == StringRef::npos) {
// If the template argument is missing (because it is part of the alias)
// we have to add it back.
ConstructCallEnd = ConstructCallStart.getLocWithOffset(ExprStr.size());
Diag << FixItHint::CreateInsertion(
ConstructCallEnd, "<" + Type->getAsString(getLangOpts()) + ">");
} else {
ConstructCallEnd = ConstructCallStart.getLocWithOffset(LAngle);
}
Diag << FixItHint::CreateReplacement(
CharSourceRange::getCharRange(ConstructCallStart, ConstructCallEnd),
makeSmartPtrFunctionName);
// If the smart_ptr is built with brace enclosed direct initialization, use
// parenthesis instead.
if (Construct->isListInitialization()) {
SourceRange BraceRange = Construct->getParenOrBraceRange();
Diag << FixItHint::CreateReplacement(
CharSourceRange::getCharRange(
BraceRange.getBegin(), BraceRange.getBegin().getLocWithOffset(1)),
"(");
Diag << FixItHint::CreateReplacement(
CharSourceRange::getCharRange(BraceRange.getEnd(),
BraceRange.getEnd().getLocWithOffset(1)),
")");
}
SourceLocation NewStart = New->getSourceRange().getBegin();
SourceLocation NewEnd = New->getSourceRange().getEnd();
switch (New->getInitializationStyle()) {
case CXXNewExpr::NoInit: {
Diag << FixItHint::CreateRemoval(SourceRange(NewStart, NewEnd));
break;
}
case CXXNewExpr::CallInit: {
SourceRange InitRange = New->getDirectInitRange();
Diag << FixItHint::CreateRemoval(
SourceRange(NewStart, InitRange.getBegin()));
Diag << FixItHint::CreateRemoval(SourceRange(InitRange.getEnd(), NewEnd));
break;
}
case CXXNewExpr::ListInit: {
// Range of the substring that we do not want to remove.
SourceRange InitRange;
if (const auto *NewConstruct = New->getConstructExpr()) {
// Direct initialization with initialization list.
// struct S { S(int x) {} };
// smart_ptr<S>(new S{5});
// The arguments in the initialization list are going to be forwarded to
// the constructor, so this has to be replaced with:
// struct S { S(int x) {} };
// std::make_smart_ptr<S>(5);
InitRange = SourceRange(
NewConstruct->getParenOrBraceRange().getBegin().getLocWithOffset(1),
NewConstruct->getParenOrBraceRange().getEnd().getLocWithOffset(-1));
} else {
// Aggregate initialization.
// smart_ptr<Pair>(new Pair{first, second});
// Has to be replaced with:
// smart_ptr<Pair>(Pair{first, second});
InitRange = SourceRange(
New->getAllocatedTypeSourceInfo()->getTypeLoc().getLocStart(),
New->getInitializer()->getSourceRange().getEnd());
}
Diag << FixItHint::CreateRemoval(
CharSourceRange::getCharRange(NewStart, InitRange.getBegin()));
Diag << FixItHint::CreateRemoval(
SourceRange(InitRange.getEnd().getLocWithOffset(1), NewEnd));
break;
}
}
}
} // namespace modernize
} // namespace tidy
} // namespace clang
|
