Access Modifiers

Access Modifiers can be specified on Classes, Class (instance and class) variables and methods to set their visibility and accessibility These are also called 'isNames' in the Cobra doc and Discussion since they're specified with a leading is keyword.

Method Access modifiers

virtual, public is default for methods

protected is default for class/instance variables with _ prefix on name
public is default for variables without _ prefix

Valid 'is' keywords are

• fake - specifies item has no implementation - a placeholder
• shared - Specifies Class (static) method or variable,
• virtual, nonvirtual - on methods, specifies that its overridable or not
• override, new - on methods specifies that a method is overriding or replacing a baseclass method of same signature
• public, protected, private, internal - specifies item visibility
• abstract - specifies a template only, subclasses must define

Separate multiple by modifiers with , e.g .... is protected, override

is fake

temporary for defining class/method api without implementation

e.g

class TextWriter
    is fake

    get newLine as String
        pass

is shared

on instance variable makes it a class variable (same as static (in Java))

is public/protected/private

on class or method(s) adjust visibility (default public)

is abstract

on class or method(s) Is a Template for subclasses to provide implementation of.

is virtual

method is redefinable

is nonvirtual

method is not redefinable

is override

Specifies that this method implementation is a redefinition of an existing(shadowed virtual or abstract) method defined in a superclass

is new

Designate that this method is a new one that hides the one that would have been inherited from a baseclass. e.g

class Vehicle

    def drive is nonvirtual
        pass

class Car inherits Vehicle

    def drive is new
       pass

When a method, property or indexer has the same name and type signature as a base member, you must specify is override or specify is new or use base. in the implementation (which is an implicit is override)