tokentype.java

java版本的词法分析器

//:LexicalAnalyser:TokenType.java
//using interfaces to create the token types which are constants
package LexicalAnalyser;

public interface TokenType{
     int   
/* 1 book-keeping tokens */
     ERROR=1,
    /* 2 multicharacter tokens */
    ID=2,NUM=3,
    /* 13 special symbols */
    ASSIGN=4,EQ=5,LT=6,LTE=7,
    PLUS=8,MINUS=9,TIMES=10,OVER=11,
    LPAREN=12,RPAREN=13,SEMI=14,LCBRACKET=15,
    RCBRACKET=16;

}