The task of an incremental attribute evaluator is to produce a consistent, fuily attributed tree after each subtree replacement. All nonincremental attribute evaluator could be applied to completely reevaluate the tree.
The purpose of this paper is ...
The task of an incremental attribute evaluator is to produce a consistent, fuily attributed tree after each subtree replacement. All nonincremental attribute evaluator could be applied to completely reevaluate the tree.
The purpose of this paper is to minimize the works by reevaluation required after each subtree relacement, to suggest the algorithm about evaluation method for incremental attribute to construct syntaxdirected editor using attribute grammal, and to generate the model fo text type syntax - directed editor.