symbol.java

用java编译的PL0编译器 附带解释器

/**
 *　各种符号的编码
 */
public enum Symbol {
	nul, ident, number, plus, minus, times, slash,
	oddsym, eql, neq, lss, leq, gtr, geq, lparen, rparen,
	comma, semicolon, period, becomes, 
	beginsym, endsym, ifsym, thensym, whilesym, writesym,
	readsym, dosym, callsym, constsym, varsym, procsym,elsesym
}