I have two structs: template <typename T> struct Odp { T m_t; T operator=(const T rhs) { return m_t = rhs; } }; struct Ftw : public Odp<int> { bool operator==(const Ftw& rhs) { return m_t == rhs.m_t; } }; I would like the following to compile: int main() { Odp<int> odp; odp = 2; ...
I would like the following to compile, but it does not: template <typename T> struct Odp { public: operator*() const { return m_p; } T* operator->() const { return m_p; } T** operator&() { return &m_p; } private: T* m_p; }; struct Ftw : public Odp<int> { bool o...
Hi! I try to load an entity with some details and there is a resellerId in the entity. Now I inherit a subclass from it, and try to access the resellerId but it's not there. How to pass the attributes to the subclasses? I really need it loaded. Thanks! edit: class Crm_Entity extends Crm_Abstract { protected $_mapper = 'Crm_Mapp...
Is it possible to do something like the following: public class ChildClass : BaseClass { public ChildClass(BaseClass o) { base = o; } } Basically, I want a transparent way to wrap a base class inside of other functionality. One example I've thought of is a custom Settings Provider which transparently audits the set...
I'm looking for bad examples of using inheritance. I'm not very creative so this was the best I could think of: class Car : public Engine {} A car has an engine, but it is not an engine. This would probably work to explain the concept, but I believe there are more illustrative examples? ...
Hi, I am involved in a web application project at the moment and we are not going to be using a framework. I am looking for the 'best' javascript inheritance implementation. I have worked with prototypal style classes as follows: function animal(options) { self = this; //properties this.name = options.name; //eve...
I have created an interface which I am inheriting from another (COM) interface: public interface IDTSComponentMetaData : IDTSComponentMetaData90 { } That's all it does. The reason behind this is, depending on which version of SQL Server I am working with, the base may be IDTSComponentMetaData90 (2005) or IDTSComponentMetaData100 (20...
I have a base class foo that will be used in multiple child classes of similar but slightly different function: Public MustInherit Class foo Public Function bar1() as Something ''// Perfectly OK to change what this method does End Function Public Function bar2() as Something ''// Does a very specific thing I...
Say I have the following traits: trait A trait B { this: A => } trait C extends B // { this: A => } Compiler error: illegal inheritance; self-type C does not conform to B's selftype B with A As expected if I uncomment the self type annotation, the compiler is happy. I think it's quite obvious why C also needs this self type. What ...
If I have a multi-module project, how can I inherit a menu from my parent POM? The project layout is: main <-- main project which just contains modules parent <-- parent POM ext <-- 3rd party code I tried this in my parent's site.xml: <menu name="Projects"> <item name="Main Project" href="${web-root}/" collapse="false...
I have a VERY complex service host which consists of multiple DUPLEX services here. They provide a bit of common functionality (Connect, Disconnect, KeepAlive, etc...) but besides that they provide very specific functionality each. All my services inherit from a common base class (abstract). So, I'm also responsible for a part of the c...
In Java, you can do instanceof. Is there a Ruby equivalent? ...
I'm working with .NET Compact Framework and just started to refactor some UI code. I'm defining a base user control to encapsulate common functionality, the project compiles OK but when I try to open a child user control in design mode I'm getting an error. I made my class hierarchy taking into account this question. My classes are like...
I'm making a memory patcher for a game but when compiling it with only a single patch implemented, no vtable was created (Using mingw). Could someone tell me what is the problem and how I can fix it? a_patch.cpp (Compile this) #include "a_patch.h" void a_patch::init_patch() { /* example initilisation */ init_var(); vector...
Hi experts! I'm working on a project where I have an abstract class of Appointment. There are Workouts, Meals and Measurements that all derived from Appointment. My architecture looks like this so far: Dao - with data access layer being entity framework 4 right now POCO classes using the T4 templates WCF Silverlight Client, ASP.net MVP...
I'm using Boost.Property_Tree for a project and I want to add a small bit of functionality to it. I want to add a "fromFile" static member variable that will figure out the file type and then use the proper parser. In my project, this is currently how I've got it. typedef boost::property_tree::ptree ConfigNode; Then I have another cla...
<disclaimer> What follows is the fruits of a thought experiment. What I'm doing isn't the issue; the symptoms are. Thank you. </disclaimer> I've finally wrapped my head around constructors, prototypes, and prototypal inheritance in JavaScript. But the SomethingSpectactular method in the sample below bugs me: function FinalClass() { ...
Multiple inheritance is not supported in dotnet. But multiple interface supports. Why this kind of behaviour exists. Any specific reasons?? ...
Hi. I have same settings for all of my forms for example color , font , align, etc How can i do these settings for one form and inheriting it on all forms. thanks. Edition 1 : i am using Windows Forms. ...
Hello I would like to use in my css simple inheritance from the browsers default values: .myfromh1{ font-weight: bold; } Can I tell css that .myfromh1 class is owning all properties of the h1 default class? thanks Arman. ...