Abstract: "Maintenance tends to degrade the structure of software, ultimately making maintenance more costly. At times, then, it is worthwhile to manipulate the structure of a system to make changes easier. However, it is shown that manual restructuring is an error-prone and expensive activity....

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	Griswold, William G. (VerfasserIn)
Format:	Buch
Sprache:	English
Veröffentlicht:	Seattle, Wash. 1991
Schriftenreihe:	University of Washington <Seattle, Wash.> / Department of Computer Science: Technical report 91,8,4
Schlagworte:	Software engineering
Zusammenfassung:	Abstract: "Maintenance tends to degrade the structure of software, ultimately making maintenance more costly. At times, then, it is worthwhile to manipulate the structure of a system to make changes easier. However, it is shown that manual restructuring is an error-prone and expensive activity. By separating structural manipulations from other maintenance activities, the semantics of a system can be held constant by a tool, assuring that no errors are introduced by restructuring To allow the maintenance team to focus on the aspects of restructuring and maintenance requiring human judgment, a transformation- based tool can be provided -- based on a model that exploits preserving data flow-dependence and control flow-dependence -- to automate the repetitive, error-prone, and computationally demanding aspects of restructuring. A set of automatable transformations is introduced; their impact on structure is described, and their usefulness is demonstrated in examples. A model to aid building meaning-preserving restructuring transformations is described, and its realization in a functioning prototype tool for restructuring Scheme programs is discussed.
Beschreibung:	IX, 189 S.