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
33 /* static bool classof(const bar *X) {
34 cerr << "Classof: " << X << "\n";
39 template <> struct isa_impl<foo, bar> {
40 static inline bool doit(const bar &Val) {
41 dbgs() << "Classof: " << &Val << "\n";
47 return cast<foo>(this);
51 return cast_or_null<foo>(this);
55 return dyn_cast<foo>(this);
59 return dyn_cast_or_null<foo>(this);
64 } // End llvm namespace
70 const foo *null_foo = NULL;
76 // test various configurations of const
78 const bar *const B4 = B2;
80 TEST(CastingTest, isa) {
81 EXPECT_TRUE(isa<foo>(B1));
82 EXPECT_TRUE(isa<foo>(B2));
83 EXPECT_TRUE(isa<foo>(B3));
84 EXPECT_TRUE(isa<foo>(B4));
87 TEST(CastingTest, cast) {
88 foo &F1 = cast<foo>(B1);
89 EXPECT_NE(&F1, null_foo);
90 const foo *F3 = cast<foo>(B2);
91 EXPECT_NE(F3, null_foo);
92 const foo *F4 = cast<foo>(B2);
93 EXPECT_NE(F4, null_foo);
94 const foo &F5 = cast<foo>(B3);
95 EXPECT_NE(&F5, null_foo);
96 const foo *F6 = cast<foo>(B4);
97 EXPECT_NE(F6, null_foo);
98 foo *F7 = cast<foo>(fub());
99 EXPECT_EQ(F7, null_foo);
101 EXPECT_NE(F8, null_foo);
104 TEST(CastingTest, cast_or_null) {
105 const foo *F11 = cast_or_null<foo>(B2);
106 EXPECT_NE(F11, null_foo);
107 const foo *F12 = cast_or_null<foo>(B2);
108 EXPECT_NE(F12, null_foo);
109 const foo *F13 = cast_or_null<foo>(B4);
110 EXPECT_NE(F13, null_foo);
111 const foo *F14 = cast_or_null<foo>(fub()); // Shouldn't print.
112 EXPECT_EQ(F14, null_foo);
114 EXPECT_NE(F15, null_foo);
117 TEST(CastingTest, dyn_cast) {
118 const foo *F1 = dyn_cast<foo>(B2);
119 EXPECT_NE(F1, null_foo);
120 const foo *F2 = dyn_cast<foo>(B2);
121 EXPECT_NE(F2, null_foo);
122 const foo *F3 = dyn_cast<foo>(B4);
123 EXPECT_NE(F3, null_foo);
124 // foo *F4 = dyn_cast<foo>(fub()); // not permittible
125 // EXPECT_EQ(F4, null_foo);
127 EXPECT_NE(F5, null_foo);
130 TEST(CastingTest, dyn_cast_or_null) {
131 const foo *F1 = dyn_cast_or_null<foo>(B2);
132 EXPECT_NE(F1, null_foo);
133 const foo *F2 = dyn_cast_or_null<foo>(B2);
134 EXPECT_NE(F2, null_foo);
135 const foo *F3 = dyn_cast_or_null<foo>(B4);
136 EXPECT_NE(F3, null_foo);
137 foo *F4 = dyn_cast_or_null<foo>(fub());
138 EXPECT_EQ(F4, null_foo);
140 EXPECT_NE(F5, null_foo);
143 // These lines are errors...
144 //foo *F20 = cast<foo>(B2); // Yields const foo*
145 //foo &F21 = cast<foo>(B3); // Yields const foo&
146 //foo *F22 = cast<foo>(B4); // Yields const foo*
147 //foo &F23 = cast_or_null<foo>(B1);
148 //const foo &F24 = cast_or_null<foo>(B3);
151 } // anonymous namespace
153 bar *llvm::fub() { return 0; }