common.h

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/************************************************************
* file: common.h
* date: 2006-03-28
* author: wuzuyang
* describe: none;
*************************************************************/
#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