这是一个简单的算符优先的语法分析程序。从文件输入文法规则以后，能够判断文法规则是否为算符优先的，并构造算符优先关系表，然后由用户输入一段合法的句子，然后对这个句子进行规约。-This is a simple operator precedence parser. From file input grammar rules, grammar rules can determine whether the operator precedence, and construct the operator

　　利用C语言编制递归下降分析程序,并对简单语言进行语法分析。-The use of C language prepared recursive descent parser, and simple language parsing.

a simple command parser

The UART to Bus IP Core is a simple command parser that can be used to access an internal bus via a UART interface. This core can be used during initial board debugging or as a permanent solution when high speed interfaces are not required. The i