From 18974ea2db48571277f9b6ecd8e18d6e2aec62cc Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Sat, 20 Apr 2019 18:54:13 +0300
Subject: [PATCH] Add cast tests to intrusive_ptr_test

---
 test/intrusive_ptr_test.cpp | 137 ++++++++++++++++++++++++++++++++++--
 1 file changed, 130 insertions(+), 7 deletions(-)

diff --git a/test/intrusive_ptr_test.cpp b/test/intrusive_ptr_test.cpp
index 0c49b97..475428f 100644
--- a/test/intrusive_ptr_test.cpp
+++ b/test/intrusive_ptr_test.cpp
@@ -42,7 +42,7 @@ class base
 {
 private:
 
-    boost::detail::atomic_count use_count_;
+    mutable boost::detail::atomic_count use_count_;
 
     base(base const &);
     base & operator=(base const &);
@@ -70,24 +70,24 @@ public:
 
 #if !defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
 
-    inline friend void intrusive_ptr_add_ref(base * p)
+    inline friend void intrusive_ptr_add_ref(base const * p)
     {
         ++p->use_count_;
     }
 
-    inline friend void intrusive_ptr_release(base * p)
+    inline friend void intrusive_ptr_release(base const * p)
     {
         if(--p->use_count_ == 0) delete p;
     }
 
 #else
 
-    void add_ref()
+    void add_ref() const
     {
         ++use_count_;
     }
 
-    void release()
+    void release() const
     {
         if(--use_count_ == 0) delete this;
     }
@@ -104,12 +104,12 @@ long base::instances = 0;
 namespace boost
 {
 
-inline void intrusive_ptr_add_ref(N::base * p)
+inline void intrusive_ptr_add_ref(N::base const * p)
 {
     p->add_ref();
 }
 
-inline void intrusive_ptr_release(N::base * p)
+inline void intrusive_ptr_release(N::base const * p)
 {
     p->release();
 }
@@ -904,15 +904,137 @@ namespace n_static_cast
 
 void test()
 {
+    {
+        boost::intrusive_ptr<X> px(new Y);
+
+        boost::intrusive_ptr<Y> py = boost::static_pointer_cast<Y>(px);
+        BOOST_TEST(px.get() == py.get());
+        BOOST_TEST(px->use_count() == 2);
+        BOOST_TEST(py->use_count() == 2);
+
+        boost::intrusive_ptr<X> px2(py);
+        BOOST_TEST(px2.get() == px.get());
+    }
+
+    BOOST_TEST( N::base::instances == 0 );
+
+    {
+        boost::intrusive_ptr<Y> py = boost::static_pointer_cast<Y>( boost::intrusive_ptr<X>(new Y) );
+        BOOST_TEST(py.get() != 0);
+        BOOST_TEST(py->use_count() == 1);
+    }
+
+    BOOST_TEST( N::base::instances == 0 );
 }
 
 } // namespace n_static_cast
 
+namespace n_const_cast
+{
+
+void test()
+{
+    {
+        boost::intrusive_ptr<X const> px;
+
+        boost::intrusive_ptr<X> px2 = boost::const_pointer_cast<X>(px);
+        BOOST_TEST(px2.get() == 0);
+    }
+
+    {
+        boost::intrusive_ptr<X> px2 = boost::const_pointer_cast<X>( boost::intrusive_ptr<X const>() );
+        BOOST_TEST(px2.get() == 0);
+    }
+
+    BOOST_TEST( N::base::instances == 0 );
+
+    {
+        boost::intrusive_ptr<X const> px(new X);
+
+        boost::intrusive_ptr<X> px2 = boost::const_pointer_cast<X>(px);
+        BOOST_TEST(px2.get() == px.get());
+        BOOST_TEST(px2->use_count() == 2);
+        BOOST_TEST(px->use_count() == 2);
+    }
+
+    BOOST_TEST( N::base::instances == 0 );
+
+    {
+        boost::intrusive_ptr<X> px = boost::const_pointer_cast<X>( boost::intrusive_ptr<X const>(new X) );
+        BOOST_TEST(px.get() != 0);
+        BOOST_TEST(px->use_count() == 1);
+    }
+
+    BOOST_TEST( N::base::instances == 0 );
+}
+
+} // namespace n_const_cast
+
 namespace n_dynamic_cast
 {
 
 void test()
 {
+    {
+        boost::intrusive_ptr<X> px;
+
+        boost::intrusive_ptr<Y> py = boost::dynamic_pointer_cast<Y>(px);
+        BOOST_TEST(py.get() == 0);
+    }
+
+    {
+        boost::intrusive_ptr<Y> py = boost::dynamic_pointer_cast<Y>( boost::intrusive_ptr<X>() );
+        BOOST_TEST(py.get() == 0);
+    }
+
+    {
+        boost::intrusive_ptr<X> px(static_cast<X*>(0));
+
+        boost::intrusive_ptr<Y> py = boost::dynamic_pointer_cast<Y>(px);
+        BOOST_TEST(py.get() == 0);
+    }
+
+    {
+        boost::intrusive_ptr<Y> py = boost::dynamic_pointer_cast<Y>( boost::intrusive_ptr<X>(static_cast<X*>(0)) );
+        BOOST_TEST(py.get() == 0);
+    }
+
+    {
+        boost::intrusive_ptr<X> px(new X);
+
+        boost::intrusive_ptr<Y> py = boost::dynamic_pointer_cast<Y>(px);
+        BOOST_TEST(py.get() == 0);
+    }
+
+    BOOST_TEST( N::base::instances == 0 );
+
+    {
+        boost::intrusive_ptr<Y> py = boost::dynamic_pointer_cast<Y>( boost::intrusive_ptr<X>(new X) );
+        BOOST_TEST(py.get() == 0);
+    }
+
+    BOOST_TEST( N::base::instances == 0 );
+
+    {
+        boost::intrusive_ptr<X> px(new Y);
+
+        boost::intrusive_ptr<Y> py = boost::dynamic_pointer_cast<Y>(px);
+        BOOST_TEST(py.get() == px.get());
+        BOOST_TEST(py->use_count() == 2);
+        BOOST_TEST(px->use_count() == 2);
+    }
+
+    BOOST_TEST( N::base::instances == 0 );
+
+    {
+        boost::intrusive_ptr<X> px(new Y);
+
+        boost::intrusive_ptr<Y> py = boost::dynamic_pointer_cast<Y>( boost::intrusive_ptr<X>(new Y) );
+        BOOST_TEST(py.get() != 0);
+        BOOST_TEST(py->use_count() == 1);
+    }
+
+    BOOST_TEST( N::base::instances == 0 );
 }
 
 } // namespace n_dynamic_cast
@@ -976,6 +1098,7 @@ int main()
     n_swap::test();
     n_comparison::test();
     n_static_cast::test();
+    n_const_cast::test();
     n_dynamic_cast::test();
 
     n_transitive::test();