Dealing with Syntactic Bracket in Operand_ First Syntax Analysis

A priority of handling syntactic bracket and grammar character is needed in operand__first syntax analysis. But the priorities can not be calculated by usual algorithm of building operand__priority table. In this paper, an operand__first grammar is modified by adding the syntactic bracket into its character set,and then,a new grammar named expansionary grammar is obtained. The needed priorities can be drawn directly by executing the same algorithm on expansionary grammar.