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CODERDRIVER/Compilation

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#模式的正规则表示
letter = [a-zA-Z]
digit=[0-9]
COMMENT="//" | "--"
WHITE_SPACE = (" "|\t|\n)+
SEMICO = ";"
L_BRACKET ="("
R_BRACKET = ")"
COMMA = ","
PLUS ="+"
MINUS ="-"
MUL ="*"
DIV ="/"
POWER = "**"
CONST_ID = digit+("."digit*)?
ID = letter+(letter|digit)*
文件目录解析:
com.lxy.lexical:
 此目录下为词法分析器的全部文件,
 其中bean为词法分析其中所用到的javabean对象
 interface 为词法分析其为外接提供的接口
 test为测试类,用来测试一些简单api的使用
 utils是词法分析其所用到的工具类
 Function为词法分析其用到的一些方法 FunctionImpl为其实现类
 Main函数为词法分析器测试程序的入口点
com.lxy.grammar
 此目录为语法分析器额全部文件
 其中errorHandler为错误处理包
 GrammarInterface为语法分析器提供的接口,GrammarInterface为其实现类
 javabean为语法分析器所用到的对象
 recursiveProgramInterface为语法分析器中所用到的所有递归子程序的所有方法的接口,..Impl为其实现类
 Utils里面包含有语法树的构以及其他辅助程序

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