next

nx::next(3nx)                       NX API                       nx::next(3nx)



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NAME
       nx::next - Skip to the next most specific method implementation

SYNOPSIS
       next ?arguments?

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DESCRIPTION
       next ?arguments?
              This command is invoked inside a method body to call the next
              most specific method implementation in the list of available
              methods. This list of available methods is specific to the
              current method-call context. This context is set by the usage
              context of nx::next (method combination vs. method-call
              interception; see below). The optional arguments are the
              argument values to be passed into the next most specific method
              implementation. If omitted, the arguments of the current method
              call are automatically forwarded. To call the next most specific
              method implementation without arguments (or to suppress argument
              forwarding), arguments must be set to an empty string. To pass
              an empty string as a (single) argument value, protect it as a
              list. The result of a call to nx::next is the result of the next
              most specific method implementation.  If there are no more
              further applicable methods, the result of nx::next will depend
              on its usage context: method combination or method-call
              interception. If nx::next is used in a method body for method
              combination, the result will be an empty string. If nx::next is
              used in the body of a filter method for method-call
              interception, the result will be an error.

              When executing a method call, the NX dispatch mechanism computes
              a list of applicable method implementations for the method name
              requested from a given object receiving the call; in support of
              method combination and method-call interception.

              For method combination, the computed list contains any object-
              local method implementation and any method implementations
              inherited by the object from the classes in its precedence list.
              Examples are overloading method implementations in the class
              hierarchy of the object, as well as from mixin classes of the
              object. For method-call interception, the computed list contains
              the applicable filter methods, again ordered by their definition
              order according to the precedence list of the called object.

              To retrieve the next most specific method implementation to be
              invoked by nx::current from the internally computed list, if
              any, use nx::current.

COPYRIGHT
       Copyright (c) 2014-16 Stefan Sobernig <stefan.sobernig@wu.ac.at>, Gustaf Neumann <gustaf.neumann@wu.ac.at>




next                                 2.3.0                       nx::next(3nx)