scanner.java

用Java实现的编译器。把源代码编译成SPARC汇编程序

		}
		while (true) {
			if (yy_initial && yy_at_bol) yy_lookahead = YY_BOL;
			else yy_lookahead = yy_advance();
			yy_next_state = YY_F;
			yy_next_state = yy_nxt[yy_rmap[yy_state]][yy_cmap[yy_lookahead]];
			if (YY_EOF == yy_lookahead && true == yy_initial) {

  return new Symbol(sym.EOF);
			}
			if (YY_F != yy_next_state) {
				yy_state = yy_next_state;
				yy_initial = false;
				yy_this_accept = yy_acpt[yy_state];
				if (YY_NOT_ACCEPT != yy_this_accept) {
					yy_last_accept_state = yy_state;
					yy_mark_end();
				}
			}
			else {
				if (YY_NO_STATE == yy_last_accept_state) {
					throw (new Error("Lexical Error: Unmatched Input."));
				}
				else {
					yy_anchor = yy_acpt[yy_last_accept_state];
					if (0 != (YY_END & yy_anchor)) {
						yy_move_end();
					}
					yy_to_mark();
					switch (yy_last_accept_state) {
					case 1:
						
					case -2:
						break;
					case 2:
						{ }
					case -3:
						break;
					case 3:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.ASSIGN, 		(yyline+1),yychar, new String("=")));}
					case -4:
						break;
					case 4:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.COMMA,		(yyline+1),yychar, new String(","))); }
					case -5:
						break;
					case 5:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.SEMI,		(yyline+1),yychar, new String(";"))); }
					case -6:
						break;
					case 6:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.LPAREN,		(yyline+1),yychar, new String("("))); }
					case -7:
						break;
					case 7:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.RPAREN,		(yyline+1),yychar, new String(")"))); }
					case -8:
						break;
					case 8:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.LSQUARE,	(yyline+1),yychar, new String("["))); }
					case -9:
						break;
					case 9:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.RSQUARE,	(yyline+1),yychar, new String("]"))); }
					case -10:
						break;
					case 10:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.LCURLY, 		(yyline+1),yychar, new String("{"))); }
					case -11:
						break;
					case 11:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.RCURLY, 		(yyline+1),yychar, new String("}"))); }
					case -12:
						break;
					case 12:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.LESSTHAN, 	(yyline+1),yychar, new String("<"))); }
					case -13:
						break;
					case 13:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.GREATERTHAN,(yyline+1),yychar, new String(">"))); }
					case -14:
						break;
					case 14:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.PLUS, 		(yyline+1),yychar, new String("+"))); }
					case -15:
						break;
					case 15:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.MINUS, 		(yyline+1),yychar, new String("-"))); }
					case -16:
						break;
					case 16:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.MULT, 		(yyline+1),yychar, new String("*"))); }
					case -17:
						break;
					case 17:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.DIVIDE,	 	(yyline+1),yychar, new String("/"))); }
					case -18:
						break;
					case 18:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.MOD, 		(yyline+1),yychar, new String("%"))); }
					case -19:
						break;
					case 19:
						{
		System.err.println(parser.infile + ": "+ (yyline+1) +": Lexical error: Illegal character: '"+yytext());
		ClassProgram.numOfError++;
		ClassProgram.semanticCheck=false;	
}
					case -20:
						break;
					case 20:
						{
	if (debug) System.out.println("Token (Indentifier) at line ("+(yyline+1)+"): "+yytext());
	lineno = yyline + 1; return (new Symbol(sym.ID,(yyline+1),yychar, new String(yytext())));
}
					case -21:
						break;
					case 21:
						{
	if (debug) System.out.println("Token (Integer Literal) at line ("+(yyline+1)+"): "+yytext());
	lineno = yyline + 1; return (new Symbol(sym.INTLIT,(yyline+1),yychar, new String(yytext())));
}
					case -22:
						break;
					case 22:
						{
		System.err.println(parser.infile + ": "+ (yyline+1) +": Lexical error: Unclosed char literal: '"+yytext());
		ClassProgram.numOfError++;
		ClassProgram.semanticCheck=false;
}
					case -23:
						break;
					case 23:
						{
		System.err.println(parser.infile + ": "+ (yyline+1) +": Lexical error: Unclosed string literal: '"+yytext());
		ClassProgram.numOfError++;
		ClassProgram.semanticCheck=false;	
}
					case -24:
						break;
					case 24:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.EQUAL, 		(yyline+1),yychar, new String("=="))); }
					case -25:
						break;
					case 25:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.LTOE, 		(yyline+1),yychar, new String("<="))); }
					case -26:
						break;
					case 26:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.SHIFTLEFT,	(yyline+1),yychar, new String("<<"))); }
					case -27:
						break;
					case 27:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.GTOE, 		(yyline+1),yychar, new String(">="))); }
					case -28:
						break;
					case 28:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.SHIFTRIGHT,	(yyline+1),yychar, new String(">>"))); }
					case -29:
						break;
					case 29:
						{
	//if (debug) System.out.println("Token (Comment line) at line ("+(yyline+1)+"): "+yytext());
}
					case -30:
						break;
					case 30:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.NOTEQUAL,	(yyline+1),yychar, new String("!="))); }
					case -31:
						break;
					case 31:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.AND, 		(yyline+1),yychar, new String("&&"))); }
					case -32:
						break;
					case 32:
						{ if (debug) System.out.println("Token at line ("+(yyline+1)+"): "+yytext());
				   lineno = yyline + 1; return (new Symbol(sym.OR,	 		(yyline+1),yychar, new String("||"))); }
					case -33:
						break;
					case 33:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.IF,		(yyline+1),yychar, new String(yytext())));
	}
					case -34:
						break;
					case 34:
						{
		System.err.println(parser.infile + ": "+ (yyline+1) +": Lexical error: Illegal identifier: '"+yytext());
		ClassProgram.numOfError++;
		ClassProgram.semanticCheck=false;
}
					case -35:
						break;
					case 35:
						{
	String str =  yytext().substring(1,yytext().length() - 1);
	if (debug) System.out.println("Token (String Literal) at line ("+(yyline+1)+"): "+str);
	lineno = yyline + 1; return (new Symbol(sym.STRINGLIT,(yyline+1),yychar, new String(str)));
}
					case -36:
						break;
					case 36:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.NEW,		(yyline+1),yychar, new String(yytext())));
	}
					case -37:
						break;
					case 37:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.FOR,		(yyline+1),yychar, new String(yytext())));
	}
					case -38:
						break;
					case 38:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.INT,		(yyline+1),yychar, new String(yytext())));
	}
					case -39:
						break;
					case 39:
						{
	String str =  yytext().substring(1,yytext().length() - 1);
	if (debug) System.out.println("Token (Char Literal) at line ("+(yyline+1)+"): "+str);
	lineno = yyline + 1; return (new Symbol(sym.CHARLIT,(yyline+1),yychar, new Character(str.charAt(0))));
}
					case -40:
						break;
					case 40:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.ELSE,		(yyline+1),yychar, new String(yytext())));
	}
					case -41:
						break;
					case 41:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.NULL,		(yyline+1),yychar, new String(yytext())));
	}
					case -42:
						break;
					case 42:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.BOOLTRUE,(yyline+1),yychar,new Boolean(yytext())));
	}
					case -43:
						break;
					case 43:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.THIS,		(yyline+1),yychar, new String(yytext())));
	}
					case -44:
						break;
					case 44:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.VOID,		(yyline+1),yychar, new String(yytext())));
	}
					case -45:
						break;
					case 45:
						{
		System.err.println(parser.infile + ": "+ (yyline+1) +": Lexical error: Double quotation marks needed for string: '"+yytext());
		ClassProgram.numOfError++;
		ClassProgram.semanticCheck=false;	
}
					case -46:
						break;
					case 46:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.CLASS,	(yyline+1),yychar, new String(yytext())));
	}
					case -47:
						break;
					case 47:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.BOOLFALSE,(yyline+1),yychar, new Boolean(yytext())));
	}
					case -48:
						break;
					case 48:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.WHILE,	(yyline+1),yychar, new String(yytext())));
	}
					case -49:
						break;
					case 49:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.RETURN,	(yyline+1),yychar, new String(yytext())));
	}
					case -50:
						break;
					case 50:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.BOOLEAN,	(yyline+1),yychar, new String(yytext())));
	}
					case -51:
						break;
					case 51:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.EXTENDS,	(yyline+1),yychar, new String(yytext())));
	}
					case -52:
						break;
					case 52:
						{
		if (debug) System.out.println("Token (Keyword) at line ("+(yyline+1)+"): "+yytext());
		lineno = yyline + 1; return (new Symbol(sym.CALLOUT,	(yyline+1),yychar, new String(yytext())));
	}
					case -53:
						break;
					case 54:
						{
		System.err.println(parser.infile + ": "+ (yyline+1) +": Lexical error: Illegal character: '"+yytext());
		ClassProgram.numOfError++;
		ClassProgram.semanticCheck=false;	
}
					case -54:
						break;
					case 55:
						{
	if (debug) System.out.println("Token (Indentifier) at line ("+(yyline+1)+"): "+yytext());
	lineno = yyline + 1; return (new Symbol(sym.ID,(yyline+1),yychar, new String(yytext())));
}
					case -55:
						break;
					case 56:
						{
	if (debug) System.out.println("Token (Integer Literal) at line ("+(yyline+1)+"): "+yytext());
	lineno = yyline + 1; return (new Symbol(sym.INTLIT,(yyline+1),yychar, new String(yytext())));
}
					case -56:
						break;
					case 57:
						{
		System.err.println(parser.infile + ": "+ (yyline+1) +": Lexical error: Unclosed char literal: '"+yytext());
		ClassProgram.numOfError++;
		ClassProgram.semanticCheck=false;
}
					case -57:
						break;
					case 58:
						{
		System.err.println(parser.infile + ": "+ (yyline+1) +": Lexical error: Illegal identifier: '"+yytext());
		ClassProgram.numOfError++;
		ClassProgram.semanticCheck=false;
}
					case -58:
						break;
					case 60:
						{
		System.err.println(parser.infile + ": "+ (yyline+1) +": Lexical error: Illegal character: '"+yytext());
		ClassProgram.numOfError++;
		ClassProgram.semanticCheck=false;	
}
					case -59:
						break;
					case 61:
						{
	if (debug) System.out.println("Token (Indentifier) at line ("+(yyline+1)+"): "+yytext());
	lineno = yyline + 1; return (new Symbol(sym.ID,(yyline+1),yychar, new String(yytext())));