polymorphism

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C++ stream polymorphy on stack?

I would like to do something like this: std::wistream input = std::wifstream(text); if (!input) input = std::wistringstream(text);[详细]

2023-04-10 04:05 分类：问答
Scala: using Nothing for singleton instances of polymorphic types

Given a polymorphic trait like trait Transform[T] { def apply( t: T ) : T } one might like to implement various sp开发者_高级运维ecialized instances, such as[详细]

2023-04-09 21:47 分类：问答
Resolving of vptr

class base { public: virtual void fn(){} }; class der : public base {}; I know that compiler provides a member call VPTR inclass which is initialised with th开发者_StackOverflow社区e exact VTABLE a[详细]

2023-04-09 10:44 分类：问答
Is it considered good practice to change the protection level of a method?

In other 开发者_C百科words if I have a class class A { public: A() { .. } virtual void somemethod() { .. }[详细]

2023-04-08 21:27 分类：问答
Polymorphic lift-json deserialization in a composed class

I am trying to automatically deserialize json object to a scala class using Lift-Json with a coordinate class inside used to store GeoJson information.[详细]

2023-04-08 09:22 分类：问答
Seeking a more elegant method to populate a WPF DataGrid with dynamic columns (one column for each object's property)

I am trying to setup a WPF datagrid. The standard datagrid is setup to accept a list of objects which are displayed on different rows, with a column for each property. I actually need to do the invers[详细]

2023-04-08 09:01 分类：问答
Polymorphic static const member variables in an ABC?

I have a rather strange situation where I would like to be able to define certain constants that a subclass of an ABC can override.[详细]

2023-04-07 07:03 分类：问答
NSArrayController for polymorphic class

I have the following (stripped down) class interfaces: @interface ScriptEvent : NSObject { ... } @interface SingleLine : ScriptE开发者_C百科vent {[详细]

2023-04-07 02:48 分类：问答
How can I tell what class in the polymorphic hierarchy contains the method I'm about to call?

If I have: class A(): def f(self): print(\"running function, f from class A\") class B(A)开发者_Python百科:[详细]

2023-04-06 20:51 分类：问答
C++ polymorphism and type casting

I am relatively new to C++ andI have been working on a basic 3D rendering engine using OpenGL.I have the following issue:[详细]

2023-04-06 18:40 分类：问答