智能指针小试

shared_ptr.cpp

@@ -1,5 +1,7 @@
 // 智能指针小试
 
+
+
 #include <iostream>
 #include <string>
 #include <boost/smart_ptr.hpp>
@@ -34,8 +36,15 @@ int main(){
     test_pc2->print_str(2);
     std::cout<<"test_pc2 use_count = "<<test_pc2.use_count()<<std::endl;
 
+    boost::weak_ptr<TC> weak_pc = test_pc2;
+    std::cout<<"weak_pc use_count = "<<weak_pc.use_count()<<std::endl;
+    // 本以为也有 weak_pc->print_str(3)
+    // weak_ptr,没有重载->和* 呵呵, 也没有get(),呵呵呵
+    // Compared to shared_ptr, weak_ptr provides a very limited subset of operations
+    // http://www.boost.org/doc/libs/1_54_0/libs/smart_ptr/weak_ptr.htm
+
     boost::shared_ptr<TC> test_pc3 = test_pc2;
-    test_pc3->print_str(3);
+    test_pc3->print_str(4);
     std::cout<<"test_pc3 use_count = "<<test_pc3.use_count()<<std::endl;
 
     return 0;