common.h

一个上课很好用的课件

#ifndef COMMON_H
#define COMMON_H
typedef enum{
ERROR, UNKNOWN,
LEXER_DONE, // success!
IF, THEN, ELSE, WHILE, DO, BEGIN, END,  //9
ID, NUM,    //11
AND, OR,
LT, LE, GT, GE, EQ, //18
ASSIGN, PLUS, MINUS, MUL, DIV,  //23
LP, RP, SEMI
}TokenType;
typedef struct{
TokenType type;
char *name;
}Token;
typedef enum{
INERROR,
START,
DONE,
INID,
INNUM,
INLE,   // LT & LE
INGE,   // GT & GE
INEQ,   // EQ & ASSIGN
INCOMMENT
}ScannerState;
typedef enum{
ST_ERROR,
ST_NORMAL,  // undefined, but not error
ST_EXP, // expression
ST_IF, ST_THEN, ST_WHILE, ST_ASSIGN, ST_BEGIN
}StatementType;
#endif