| //===- llvm/unittest/ADT/polymorphic_ptr.h - polymorphic_ptr<T> tests -----===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "gtest/gtest.h" |
| #include "llvm/ADT/polymorphic_ptr.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| struct S { |
| S(int x) : x(x) {} |
| S *clone() { return new S(*this); } |
| int x; |
| }; |
| |
| // A function that forces the return of a copy. |
| template <typename T> |
| T dummy_copy(const T &arg) { return arg; } |
| |
| TEST(polymorphic_ptr_test, Basic) { |
| polymorphic_ptr<S> null; |
| EXPECT_FALSE((bool)null); |
| EXPECT_TRUE(!null); |
| EXPECT_EQ((S*)0, null.get()); |
| |
| S *s = new S(42); |
| polymorphic_ptr<S> p(s); |
| EXPECT_TRUE((bool)p); |
| EXPECT_FALSE(!p); |
| EXPECT_TRUE(p != null); |
| EXPECT_FALSE(p == null); |
| EXPECT_TRUE(p == s); |
| EXPECT_TRUE(s == p); |
| EXPECT_FALSE(p != s); |
| EXPECT_FALSE(s != p); |
| EXPECT_EQ(s, &*p); |
| EXPECT_EQ(s, p.operator->()); |
| EXPECT_EQ(s, p.get()); |
| EXPECT_EQ(42, p->x); |
| |
| EXPECT_EQ(s, p.take()); |
| EXPECT_FALSE((bool)p); |
| EXPECT_TRUE(!p); |
| p = s; |
| EXPECT_TRUE((bool)p); |
| EXPECT_FALSE(!p); |
| EXPECT_EQ(s, &*p); |
| EXPECT_EQ(s, p.operator->()); |
| EXPECT_EQ(s, p.get()); |
| EXPECT_EQ(42, p->x); |
| |
| polymorphic_ptr<S> p2((llvm_move(p))); |
| #if !LLVM_HAS_RVALUE_REFERENCES |
| // 'p' may not have been moved from in C++98, fake it for the test. |
| p2 = p.take(); |
| #endif |
| EXPECT_FALSE((bool)p); |
| EXPECT_TRUE(!p); |
| EXPECT_TRUE((bool)p2); |
| EXPECT_FALSE(!p2); |
| EXPECT_EQ(s, &*p2); |
| |
| using std::swap; |
| swap(p, p2); |
| EXPECT_TRUE((bool)p); |
| EXPECT_FALSE(!p); |
| EXPECT_EQ(s, &*p); |
| EXPECT_FALSE((bool)p2); |
| EXPECT_TRUE(!p2); |
| |
| // Force copies and that everything survives. |
| polymorphic_ptr<S> p3 = dummy_copy(polymorphic_ptr<S>(p)); |
| EXPECT_TRUE((bool)p3); |
| EXPECT_FALSE(!p3); |
| EXPECT_NE(s, &*p3); |
| EXPECT_EQ(42, p3->x); |
| |
| // Force copies of null without trying to dereference anything. |
| polymorphic_ptr<S> null_copy = dummy_copy(polymorphic_ptr<S>(null)); |
| EXPECT_FALSE((bool)null_copy); |
| EXPECT_TRUE(!null_copy); |
| EXPECT_EQ(null, null_copy); |
| } |
| |
| struct Base { |
| virtual ~Base() {} |
| virtual Base *clone() = 0; |
| virtual StringRef name() { return "Base"; } |
| }; |
| |
| struct DerivedA : Base { |
| virtual DerivedA *clone() { return new DerivedA(); } |
| virtual StringRef name() { return "DerivedA"; } |
| }; |
| struct DerivedB : Base { |
| virtual DerivedB *clone() { return new DerivedB(); } |
| virtual StringRef name() { return "DerivedB"; } |
| }; |
| |
| TEST(polymorphic_ptr_test, Polymorphism) { |
| polymorphic_ptr<Base> a(new DerivedA()); |
| polymorphic_ptr<Base> b(new DerivedB()); |
| |
| EXPECT_EQ("DerivedA", a->name()); |
| EXPECT_EQ("DerivedB", b->name()); |
| |
| polymorphic_ptr<Base> copy = dummy_copy(a); |
| EXPECT_NE(a, copy); |
| EXPECT_EQ("DerivedA", copy->name()); |
| |
| copy = dummy_copy(b); |
| EXPECT_NE(b, copy); |
| EXPECT_EQ("DerivedB", copy->name()); |
| |
| // Test creating a copy out of a temporary directly. |
| copy = dummy_copy<polymorphic_ptr<Base> >(new DerivedA()); |
| EXPECT_NE(a, copy); |
| EXPECT_EQ("DerivedA", copy->name()); |
| } |
| |
| } |