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
|
//===- unittests/Analysis/FlowSensitive/MatchSwitchTest.cpp ---------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "clang/Analysis/FlowSensitive/MatchSwitch.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/Expr.h"
#include "clang/AST/Stmt.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/ADT/StringRef.h"
#include "gtest/gtest.h"
#include <cstdint>
#include <memory>
#include <ostream>
#include <string>
#include <utility>
using namespace clang;
using namespace dataflow;
using namespace ast_matchers;
namespace {
TEST(MatchSwitchTest, Stmts) {
std::string Code = R"(
void Foo();
void Bar();
void f() {
int X = 1;
Foo();
Bar();
}
)";
auto Unit = tooling::buildASTFromCode(Code);
auto &Ctx = Unit->getASTContext();
llvm::StringRef XStr = "X";
llvm::StringRef FooStr = "Foo";
llvm::StringRef BarStr = "Bar";
auto XMatcher = declStmt(hasSingleDecl(varDecl(hasName(XStr))));
auto FooMatcher = callExpr(callee(functionDecl(hasName(FooStr))));
auto BarMatcher = callExpr(callee(functionDecl(hasName(BarStr))));
ASTMatchSwitch<Stmt, llvm::StringRef> MS =
ASTMatchSwitchBuilder<Stmt, llvm::StringRef>()
.CaseOf<Stmt>(XMatcher,
[&XStr](const Stmt *, const MatchFinder::MatchResult &,
llvm::StringRef &State) { State = XStr; })
.CaseOf<Stmt>(FooMatcher,
[&FooStr](const Stmt *,
const MatchFinder::MatchResult &,
llvm::StringRef &State) { State = FooStr; })
.Build();
llvm::StringRef State;
// State modified from the first case of the switch
const auto *X = selectFirst<Stmt>(XStr, match(XMatcher.bind(XStr), Ctx));
MS(*X, Ctx, State);
EXPECT_EQ(State, XStr);
// State modified from the second case of the switch
const auto *Foo =
selectFirst<Stmt>(FooStr, match(FooMatcher.bind(FooStr), Ctx));
MS(*Foo, Ctx, State);
EXPECT_EQ(State, FooStr);
// State unmodified, no case defined for calling Bar
const auto *Bar =
selectFirst<Stmt>(BarStr, match(BarMatcher.bind(BarStr), Ctx));
MS(*Bar, Ctx, State);
EXPECT_EQ(State, FooStr);
}
TEST(MatchSwitchTest, CtorInitializers) {
std::string Code = R"(
struct f {
int i;
int j;
int z;
f(): i(1), j(1), z(1) {}
};
)";
auto Unit = tooling::buildASTFromCode(Code);
auto &Ctx = Unit->getASTContext();
llvm::StringRef IStr = "i";
llvm::StringRef JStr = "j";
llvm::StringRef ZStr = "z";
auto InitI = cxxCtorInitializer(forField(hasName(IStr)));
auto InitJ = cxxCtorInitializer(forField(hasName(JStr)));
auto InitZ = cxxCtorInitializer(forField(hasName(ZStr)));
ASTMatchSwitch<CXXCtorInitializer, llvm::StringRef> MS =
ASTMatchSwitchBuilder<CXXCtorInitializer, llvm::StringRef>()
.CaseOf<CXXCtorInitializer>(
InitI, [&IStr](const CXXCtorInitializer *,
const MatchFinder::MatchResult &,
llvm::StringRef &State) { State = IStr; })
.CaseOf<CXXCtorInitializer>(
InitJ, [&JStr](const CXXCtorInitializer *,
const MatchFinder::MatchResult &,
llvm::StringRef &State) { State = JStr; })
.Build();
llvm::StringRef State;
// State modified from the first case of the switch
const auto *I =
selectFirst<CXXCtorInitializer>(IStr, match(InitI.bind(IStr), Ctx));
MS(*I, Ctx, State);
EXPECT_EQ(State, IStr);
// State modified from the second case of the switch
const auto *J =
selectFirst<CXXCtorInitializer>(JStr, match(InitJ.bind(JStr), Ctx));
MS(*J, Ctx, State);
EXPECT_EQ(State, JStr);
// State unmodified, no case defined for the initializer of z
const auto *Z =
selectFirst<CXXCtorInitializer>(ZStr, match(InitZ.bind(ZStr), Ctx));
MS(*Z, Ctx, State);
EXPECT_EQ(State, JStr);
}
TEST(MatchSwitchTest, ReturnNonVoid) {
auto Unit =
tooling::buildASTFromCode("void f() { int x = 42; }", "input.cc",
std::make_shared<PCHContainerOperations>());
auto &Context = Unit->getASTContext();
const auto *S =
selectFirst<FunctionDecl>(
"f",
match(functionDecl(isDefinition(), hasName("f")).bind("f"), Context))
->getBody();
ASTMatchSwitch<Stmt, const int, std::vector<int>> Switch =
ASTMatchSwitchBuilder<Stmt, const int, std::vector<int>>()
.CaseOf<Stmt>(stmt(),
[](const Stmt *, const MatchFinder::MatchResult &,
const int &State) -> std::vector<int> {
return {1, State, 3};
})
.Build();
std::vector<int> Actual = Switch(*S, Context, 7);
std::vector<int> Expected{1, 7, 3};
EXPECT_EQ(Actual, Expected);
}
} // namespace
|
