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I've just seen some (presumably) C++ code which sports two "keywords" unknown to me (I'm assuming keywords but, since I have no context, they may be simple #define things).
They also don't seem to appear in the C++11 standard, at least the draft I have but, since that's a pretty late draft, I can't imagine them being just dropped into the standard at the last minute. They are ref and sealed.
The code I found them in was something like:
public ref class DevIface sealed {
private:
int currOffset;
public:
DevIface (int initOffset);
: : :
Does anyone know what these keywords are, and what they're meant to achieve?
345
Sealed classes are used to restrict the users from inheriting the class. A class can be sealed by using the sealed keyword. The keyword tells the compiler that the class is sealed, and therefore, cannot be extended. No class can be derived from a sealed class.
Sealed classes and interfaces represent restricted class hierarchies that provide more control over inheritance. All direct subclasses of a sealed class are known at compile time. No other subclasses may appear outside a module within which the sealed class is defined.
We use sealed classes to prevent inheritance. As we cannot inherit from a sealed class, the methods in the sealed class cannot be manipulated from other classes. It helps to prevent security issues.
The sealed modifier is used to prevent derivation from a class. An error occurs if a sealed class is specified as the base class of another class.
This is C++/CLI.
A ref class is a managed type.sealed means that the class cannot be inherited
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