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