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/raw_ostream.h"
11 #include "llvm/Support/Debug.h"
12 //#define DEBUG_CAST_OPERATORS
13 #include "llvm/Support/Casting.h"
15 #include "gtest/gtest.h"
21 // set up two example classes
22 // 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);
51 } // End llvm namespace
57 const foo *null_foo = NULL;
61 // test various configurations of const
63 const bar *const B4 = B2;
65 TEST(CastingTest, isa) {
66 EXPECT_TRUE(isa<foo>(B1));
67 EXPECT_TRUE(isa<foo>(B2));
68 EXPECT_TRUE(isa<foo>(B3));
69 EXPECT_TRUE(isa<foo>(B4));
72 TEST(CastingTest, cast) {
73 foo &F1 = cast<foo>(B1);
74 EXPECT_NE(&F1, null_foo);
75 const foo *F3 = cast<foo>(B2);
76 EXPECT_NE(F3, null_foo);
77 const foo *F4 = cast<foo>(B2);
78 EXPECT_NE(F4, null_foo);
79 const foo &F5 = cast<foo>(B3);
80 EXPECT_NE(&F5, null_foo);
81 const foo *F6 = cast<foo>(B4);
82 EXPECT_NE(F6, null_foo);
83 foo *F7 = cast<foo>(fub());
84 EXPECT_EQ(F7, null_foo);
86 /* foo *F8 = B1.baz();
87 EXPECT_NE(F8, null_foo);*/
90 TEST(CastingTest, cast_or_null) {
91 const foo *F11 = cast_or_null<foo>(B2);
92 EXPECT_NE(F11, null_foo);
93 const foo *F12 = cast_or_null<foo>(B2);
94 EXPECT_NE(F12, null_foo);
95 const foo *F13 = cast_or_null<foo>(B4);
96 EXPECT_NE(F13, null_foo);
97 const foo *F14 = cast_or_null<foo>(fub()); // Shouldn't print.
98 EXPECT_EQ(F14, null_foo);
101 // These lines are errors...
102 //foo *F20 = cast<foo>(B2); // Yields const foo*
103 //foo &F21 = cast<foo>(B3); // Yields const foo&
104 //foo *F22 = cast<foo>(B4); // Yields const foo*
105 //foo &F23 = cast_or_null<foo>(B1);
106 //const foo &F24 = cast_or_null<foo>(B3);
112 } // anonymous namespace
114 bar *llvm::fub() { return 0; }