metaclass वाक्य
उदाहरण वाक्य
मोबाइल
- Because different classes can have different sets of class methods, each class must have its own separate metaclass.
- The explicit metaclass support in ObjVlisp influenced the provision of the same capability in the Common Lisp Object System.
- In UML 2 . x, a powertype is a metaclass whose instances are subclasses of a given class.
- ObjVlisp provided a far more flexible metaclass model than that provided by earlier object-oriented languages, especially Smalltalk.
- In the Semantic Web, a "'metaclass "'is a class whose instances are classes.
- This enables knowledge about instances of those metaclasses to be inferred by semantic reasoners using statements made in the metaclass.
- Powertype ( UML ) and " singleton class " seems to exists in literature in the metaclass context.
- Because of this, many objects in Inform do not inherit from any class, other than the " metaclass " Object.
- In turn, the class Car is again an object and as such an instance of the metaclass of Car called Car class.
- Since there is no requirement that metaclasses behave differently from each other, all metaclasses are instances of only one class called Metaclass.
- Unlike Smalltalk, the metaclass of the root class inherits from the root class ( usually NSObject using the Cocoa framework ) itself.
- Metaclasses can be implemented by having classes be first-class citizen, in which case a metaclass is simply an object that constructs classes.
- Groovy's changes in code through prototyping are not visible in Java, since each attribute / method invocation in Groovy goes through the metaclass registry.
- Variable order metaclasses, on the other hand, can have instances, one example of variable order metaclass is the class of all fixed order classes.
- Together this implies that a class in Smalltalk is an object and that therefore a class needs to be an instance of a class ( called metaclass ).
- By contrast, in ObjVlisp, it is possible to define named metaclasses, and when defining a class one must specify which named metaclass it will instantiate.
- Like Smalltalk, in Objective-C, class methods are simply methods called on the class object, hence a class's class methods must be defined as instance methods in its metaclass.
- Classes and metaclasses are always created as a pair : the runtime has functions objc _ allocateClassPair ( ) and objc _ registerClassPair ( ) to create and register class-metaclass pairs, respectively.
- Thus evaluating Car class results in the metaclass object for Car whose name is Car class ( one can confirm this by evaluating Car class name which returns the name of the metaclass of Car .)
- Thus evaluating Car class results in the metaclass object for Car whose name is Car class ( one can confirm this by evaluating Car class name which returns the name of the metaclass of Car .)
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