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Shell Programming and Scripting
Dynamic Variable data problem
Post 302809855 by Don Cragun on Monday 20th of May 2013 11:55:10 PM
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LEARN ABOUT NETBSD
transferfunct
TransferFunct(3U) InterViews Reference Manual TransferFunct(3U) NAME
TransferFunct - transfer function base class SYNOPSIS
#include <Unidraw/transfn.h> DESCRIPTION
A transfer function defines relationships between state variables. A component uses a transfer function to enforce dependencies between its state variables during dataflow. State variables whose values change as a result of data flowing into the component can thus affect the component's dependent state variables as defined by its transfer function. A transfer function can define dependencies between any number of state variables, but a component can define only one transfer function. PUBLIC OPERATIONS
virtual void Evaluate(Path* = nil) Enforce the transfer function's dependencies between its state variables, optionally depending on the information in a path. This operation does nothing by default. virtual TransferFunct* Copy() Return a copy of the transfer function. Subclasses redefine this operation to return an instance of their type. virtual void Read(istream&) virtual void Write(ostream&) Read and write the transfer function's contents to a stream to support catalog operations. Read and write typically call first the corresponding operations defined by their parent class, and then they read or write their class-specific state. virtual ClassId GetClassId() virtual boolean IsA(ClassId) GetClassId returns the unique class identifier for the TransferFunct subclass, while IsA returns whether the instance is of a class or subclass corresponding to the given identifier. IsA typically checks the given identifier against the instance's own (as defined by its GetClassId operation) and, failing that, calls its parent classes' IsA operation. All subclasses must redefine GetClassId and IsA to ensure that their identifiers are unique and that instances are written and read properly. PROTECTED OPERATIONS
TransferFunct() The constructor is protected to prevent instantiation. virtual Connector* GetBinding(StateVar*) Return the connector to which a state variable is bound. SEE ALSO
Catalog(3U), Component(3U), Connector(3U), Creator(3U), Path(3U), StateVar(3U) classes(3U), istream(3C++), ostream(3C++) Unidraw 6 August 1990 TransferFunct(3U)