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//===- 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());
}
}
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