1 files changed, 154 insertions, 0 deletions
diff --git a/unittests/Support/Casting.cpp b/unittests/Support/Casting.cpp
new file mode 100644
index 0000000..ae84693
--- /dev/null
+++ b/unittests/Support/Casting.cpp
@@ -0,0 +1,154 @@
+//===---------- llvm/unittest/Support/Casting.cpp - Casting tests ---------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/Casting.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
+
+#include "gtest/gtest.h"
+#include <cstdlib>
+
+namespace llvm {
+
+// set up two example classes
+// with conversion facility
+//
+struct bar {
+  bar() {}
+  struct foo *baz();
+  struct foo *caz();
+  struct foo *daz();
+  struct foo *naz();
+private:
+  bar(const bar &);
+};
+struct foo {
+  void ext() const;
+  /*  static bool classof(const bar *X) {
+    cerr << "Classof: " << X << "\n";
+    return true;
+    }*/
+};
+
+template <> struct isa_impl<foo, bar> {
+  static inline bool doit(const bar &Val) {
+    dbgs() << "Classof: " << &Val << "\n";
+    return true;
+  }
+};
+
+foo *bar::baz() {
+    return cast<foo>(this);
+}
+
+foo *bar::caz() {
+    return cast_or_null<foo>(this);
+}
+
+foo *bar::daz() {
+    return dyn_cast<foo>(this);
+}
+
+foo *bar::naz() {
+    return dyn_cast_or_null<foo>(this);
+}
+
+
+bar *fub();
+} // End llvm namespace
+
+using namespace llvm;
+
+namespace {
+
+const foo *null_foo = NULL;
+
+extern bar &B1;
+extern const bar *B2;
+// test various configurations of const
+const bar &B3 = B1;
+const bar *const B4 = B2;
+
+TEST(CastingTest, isa) {
+  EXPECT_TRUE(isa<foo>(B1));
+  EXPECT_TRUE(isa<foo>(B2));
+  EXPECT_TRUE(isa<foo>(B3));
+  EXPECT_TRUE(isa<foo>(B4));
+}
+
+TEST(CastingTest, cast) {
+  foo &F1 = cast<foo>(B1);
+  EXPECT_NE(&F1, null_foo);
+  const foo *F3 = cast<foo>(B2);
+  EXPECT_NE(F3, null_foo);
+  const foo *F4 = cast<foo>(B2);
+  EXPECT_NE(F4, null_foo);
+  const foo &F5 = cast<foo>(B3);
+  EXPECT_NE(&F5, null_foo);
+  const foo *F6 = cast<foo>(B4);
+  EXPECT_NE(F6, null_foo);
+  foo *F7 = cast<foo>(fub());
+  EXPECT_EQ(F7, null_foo);
+  foo *F8 = B1.baz();
+  EXPECT_NE(F8, null_foo);
+}
+
+TEST(CastingTest, cast_or_null) {
+  const foo *F11 = cast_or_null<foo>(B2);
+  EXPECT_NE(F11, null_foo);
+  const foo *F12 = cast_or_null<foo>(B2);
+  EXPECT_NE(F12, null_foo);
+  const foo *F13 = cast_or_null<foo>(B4);
+  EXPECT_NE(F13, null_foo);
+  const foo *F14 = cast_or_null<foo>(fub());  // Shouldn't print.
+  EXPECT_EQ(F14, null_foo);
+  foo *F15 = B1.caz();
+  EXPECT_NE(F15, null_foo);
+}
+
+TEST(CastingTest, dyn_cast) {
+  const foo *F1 = dyn_cast<foo>(B2);
+  EXPECT_NE(F1, null_foo);
+  const foo *F2 = dyn_cast<foo>(B2);
+  EXPECT_NE(F2, null_foo);
+  const foo *F3 = dyn_cast<foo>(B4);
+  EXPECT_NE(F3, null_foo);
+  // foo *F4 = dyn_cast<foo>(fub()); // not permittible
+  // EXPECT_EQ(F4, null_foo);
+  foo *F5 = B1.daz();
+  EXPECT_NE(F5, null_foo);
+}
+
+TEST(CastingTest, dyn_cast_or_null) {
+  const foo *F1 = dyn_cast_or_null<foo>(B2);
+  EXPECT_NE(F1, null_foo);
+  const foo *F2 = dyn_cast_or_null<foo>(B2);
+  EXPECT_NE(F2, null_foo);
+  const foo *F3 = dyn_cast_or_null<foo>(B4);
+  EXPECT_NE(F3, null_foo);
+  foo *F4 = dyn_cast_or_null<foo>(fub());
+  EXPECT_EQ(F4, null_foo);
+  foo *F5 = B1.naz();
+  EXPECT_NE(F5, null_foo);
+}
+
+// These lines are errors...
+//foo *F20 = cast<foo>(B2);  // Yields const foo*
+//foo &F21 = cast<foo>(B3);  // Yields const foo&
+//foo *F22 = cast<foo>(B4);  // Yields const foo*
+//foo &F23 = cast_or_null<foo>(B1);
+//const foo &F24 = cast_or_null<foo>(B3);
+
+
+bar B;
+bar &B1 = B;
+const bar *B2 = &B;
+}  // anonymous namespace
+
+bar *llvm::fub() { return 0; }