downcast

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Use Method by Real Type

I learned that I can use the real type of a Object to define which Method is used开发者_运维技巧, such like this:[详细]

2023-04-11 17:38 分类：问答
Interface Downcasting

Please suppose I have the following extension method in order to be able to force evaluation of an IEnumerable:[详细]

2023-04-10 13:36 分类：问答
Why can't static_cast be used to down-cast when virtual inheritance is involved?

Consider the following code: struct Base {}; struct Derived : public virtual Base {}; void f() { Base* b = new Derived;[详细]

2023-04-05 22:56 分类：问答
Downcasting with Entity Framework

I have a project where I\'ve defined in EF an Employer as a derived class of User.In my process I create a user without knowing whether it will eventually be an employer (or other kinds of users) and[详细]

2023-04-02 04:52 分类：问答
What's faster: down-cast from virtual base or cross-cast?

This is somewhat hypothetical as I\'m not too worried about performance - just wondering which option is actually the fastest/most efficient in general, or if there is no difference whatsoever.[详细]

2023-03-25 16:34 分类：问答
Dynamic downcast on private inheritance within private scope

A tweak on this question that I\'ve run into. Consider: class A {}; class B : private A { static void foo();[详细]

2023-03-25 04:16 分类：问答
How does one downcast a std::shared_ptr?

Consider: struct SomethingThatsABase { virtual bool IsChildOne() const { return false; } virtual bool IsChildTwo() const { return false; }[详细]

2023-03-22 20:31 分类：问答
Downcasting from Object to Integer Runtime Error: java.lang.ClassCastException

Run time exception-- java.lang.ClassCastingException... Integer intArr[] = new Integer[arrList.size()];[详细]

2023-03-20 01:36 分类：问答
Scala: downcasting throws java.lang.ClassCastException

Coming from a non-Java background to Scala has brought me a wide range of difficulties including this one.[详细]

2023-03-18 23:32 分类：问答
problem with a HashSet's Iterator

I\'m trying to see if HashSet would be the solution for my next project so i\'m doing some very easy test to check functionalities.[详细]

2023-03-10 21:03 分类：问答