"Hello World!\n"; } }; void f() { C c; throw c; // copying the named object c into the exception object. } // 由于异常对象保存在线程信息块TIB中,这里的复制构造不可省略. 这使得调用栈上压栈保存的函数都有机会处理这个异常对象
need to mimic object composition by stepwise copying fields from one object to another. It natively supports Trait and Mixin based object composition via
Kevo implemented a pure concatenation-based object model in which new objects were created by copying and the namespaces of all the objects were always