一个关于语法分析的程-a grammatical analysis on the way

lex,yacc是词法、语法分析工具，文档介绍了词法语法分析过程及java下的lex-yacc工具——java-lex, yacc is a lexical, grammar analysis tools, document describes the process of lexical and syntax analysis under the lex-yacc java tools- javacc