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What is the curiously recurring template pattern (CRTP)?
...
In short, CRTP is when a class A has a base class which is a template specialization for the class A itself. E.g.
template <class T>
class X{...};
class A : public X<A> {...};
It is curiously recurring, isn't it? :)
Now, what does this give you? T...
Private virtual method in C++
...ly, a derived class's override of a virtual function will have to call the base class version. It can't if it's declared private:
class Base
{
private:
int m_data;
virtual void cleanup() { /*do something*/ }
protected:
Base(int idata): m_data (idata) {}
public:
int data() const { retur...
Inheritance and Overriding __init__ in python
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Yes, in case of multiple inheritance and base classes taking constructor arguments, you usually find yourself calling the constructors manually.
– Torsten Marek
Apr 15 '09 at 22:53
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How do I pass a unique_ptr argument to a constructor or a function?
...ointer as an argument, as well as their associated meaning.
(A) By Value
Base(std::unique_ptr<Base> n)
: next(std::move(n)) {}
In order for the user to call this, they must do one of the following:
Base newBase(std::move(nextBase));
Base fromTemp(std::unique_ptr<Base>(new Base(......
How can I get Visual Studio 2008 Windows Forms designer to render a Form that implements an abstract
...rom this code to the problem
Form1 : Form
Problem
public class Form1 : BaseForm
...
public abstract class BaseForm : Form
This is where the initial question came into play. As said before, a friend pointed out that System.Windows.Forms.Form implements a base class that is abstract. We were a...
How to invoke the super constructor in Python?
...mond-shaped inheritance very well, since you may end up calling the shared base class's initialiser twice.
Another way is to use super(), as others have shown. For single-inheritance, it does basically the same thing as letting you call the parent's initialiser.
However, super() is quite a bit mo...
What are Aggregates and PODs and how/why are they special?
... (12.1), no private or protected non-static data members (clause 11),
no base classes (clause 10), and no virtual functions (10.3).
So, OK, let's parse this definition. First of all, any array is an aggregate. A class can also be an aggregate if… wait! nothing is said about structs or unions, ...
augmented reality framework [closed]
... I would also add that it depends if you want do do location based AR or vision based (e.g. marker based) AR. I would say that on android for vision based ar metaio.com/software/mobile-sdk is realy good and for location based you can also try droidar.googlecode.com or code.google.com/p...
C++ Exceptions questions on rethrow of original exception
...ou will lose derived-class-specific data during the copy-construction of a base class instance.
Simple program to illustrate what's happening:
#include <stdio.h>
struct MyErr {
MyErr() {
printf(" Base default constructor, this=%p\n", this);
}
MyErr(const MyErr& other) {
...
Format bytes to kilobytes, megabytes, gigabytes
Scenario: the size of various files are stored in a database as bytes. What's the best way to format this size info to kilobytes, megabytes and gigabytes? For instance I have an MP3 that Ubuntu displays as "5.2 MB (5445632 bytes)". How would I display this on a web page as "5.2 MB" AND have files le...