1 //===---------- llvm/unittest/Support/Casting.cpp - Casting tests ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/Support/Casting.h"
11 #include "llvm/Support/Debug.h"
12 #include "llvm/Support/raw_ostream.h"
14 #include "gtest/gtest.h"
19 // set up two example classes
20 // with conversion facility
32 /* static bool classof(const bar *X) {
33 cerr << "Classof: " << X << "\n";
38 template <> struct isa_impl<foo,bar> {
39 static inline bool doit(const bar &Val) {
40 dbgs() << "Classof: " << &Val << "\n";
46 return cast<foo>(this);
50 return cast_or_null<foo>(this);
55 return dyn_cast<foo>(this);
60 } // End llvm namespace
66 const foo *null_foo = NULL;
70 // test various configurations of const
72 const bar *const B4 = B2;
74 TEST(CastingTest, isa) {
75 EXPECT_TRUE(isa<foo>(B1));
76 EXPECT_TRUE(isa<foo>(B2));
77 EXPECT_TRUE(isa<foo>(B3));
78 EXPECT_TRUE(isa<foo>(B4));
81 TEST(CastingTest, cast) {
82 foo &F1 = cast<foo>(B1);
83 EXPECT_NE(&F1, null_foo);
84 const foo *F3 = cast<foo>(B2);
85 EXPECT_NE(F3, null_foo);
86 const foo *F4 = cast<foo>(B2);
87 EXPECT_NE(F4, null_foo);
88 const foo &F5 = cast<foo>(B3);
89 EXPECT_NE(&F5, null_foo);
90 const foo *F6 = cast<foo>(B4);
91 EXPECT_NE(F6, null_foo);
92 foo *F7 = cast<foo>(fub());
93 EXPECT_EQ(F7, null_foo);
95 EXPECT_NE(F8, null_foo);
98 TEST(CastingTest, cast_or_null) {
99 const foo *F11 = cast_or_null<foo>(B2);
100 EXPECT_NE(F11, null_foo);
101 const foo *F12 = cast_or_null<foo>(B2);
102 EXPECT_NE(F12, null_foo);
103 const foo *F13 = cast_or_null<foo>(B4);
104 EXPECT_NE(F13, null_foo);
105 const foo *F14 = cast_or_null<foo>(fub()); // Shouldn't print.
106 EXPECT_EQ(F14, null_foo);
108 EXPECT_NE(F15, null_foo);
111 TEST(CastingTest, dyn_cast) {
112 const foo *F1 = dyn_cast<foo>(B2);
113 EXPECT_NE(F1, null_foo);
114 const foo *F2 = dyn_cast<foo>(B2);
115 EXPECT_NE(F2, null_foo);
116 const foo *F3 = dyn_cast<foo>(B4);
117 EXPECT_NE(F3, null_foo);
118 foo *F4 = dyn_cast<foo>(fub());
119 EXPECT_EQ(F4, null_foo);
120 // foo *F5 = B1.daz();
121 // EXPECT_NE(F5, null_foo);
124 // These lines are errors...
125 //foo *F20 = cast<foo>(B2); // Yields const foo*
126 //foo &F21 = cast<foo>(B3); // Yields const foo&
127 //foo *F22 = cast<foo>(B4); // Yields const foo*
128 //foo &F23 = cast_or_null<foo>(B1);
129 //const foo &F24 = cast_or_null<foo>(B3);
135 } // anonymous namespace
137 bar *llvm::fub() { return 0; }