Ejemplo n.º 1
0
  private void ref_id() {
    if (tok.kind == TK.TILDE) {
      scan();
      if (tok.kind == TK.NUM) {
        int num = Integer.parseInt(tok.string);
        scan();
        if (num > curBlock) {
          System.err.println(
              "no such variable ~" + num + tok.string + " on line " + tok.lineNumber);
          System.exit(1);
        }
        if (searchTildaSpec(tok.string, num))
          System.out.print("x_" + (curBlock - num) + tok.string);
      } else {
        if (searchTildaGlob(tok.string)) System.out.print("x_0" + tok.string);
      }
      mustbe(TK.ID);

    } else {
      if (searchUndeclared(tok.string)) {
        int numPrint = searchNum(tok.string);
        System.out.print("x_" + numPrint + tok.string);
      }
      mustbe(TK.ID);
    }
  }
Ejemplo n.º 2
0
 private void declaration() {
   mustbe(TK.DECLARE);
   if (searchCurBlock(tok.string)) System.out.println("int x_" + curBlock + tok.string + ";");
   mustbe(TK.ID);
   while (is(TK.COMMA)) {
     scan();
     if (searchCurBlock(tok.string)) System.out.println("int x_" + curBlock + tok.string + ";");
     mustbe(TK.ID);
   }
 }
Ejemplo n.º 3
0
 private void assign() {
   ref_id();
   System.out.print("=");
   mustbe(TK.ASSIGN);
   expr();
   System.out.println(";");
 }
Ejemplo n.º 4
0
 private void factor() {
   if (tok.kind == TK.LPAREN) {
     System.out.print("(");
     scan();
     expr();
     System.out.print(")");
     mustbe(TK.RPAREN);
   } else if (tok.kind == TK.NUM) {
     while (is(TK.NUM)) {
       System.out.print(tok.string);
       // System.out.println(tok+"In the Factor");
       mustbe(TK.NUM);
     }
   } else {
     ref_id();
   }
 }
Ejemplo n.º 5
0
 private void If_statement() {
   System.out.print("if");
   mustbe(TK.IF);
   guarded_command();
   while (is(TK.ELSEIF)) {
     System.out.print("else if");
     scan();
     guarded_command();
   }
   if (tok.kind == TK.ELSE) {
     System.out.print("else");
     scan();
     addBlock();
     System.out.println("{");
     block();
     System.out.println("}");
     removeBlock();
   }
   mustbe(TK.ENDIF);
 }
Ejemplo n.º 6
0
 private void guarded_command() {
   System.out.print("(");
   expr();
   System.out.print(" <= 0");
   mustbe(TK.THEN);
   System.out.print(")");
   addBlock();
   System.out.println("{");
   block();
   System.out.println("}");
   removeBlock();
 }
Ejemplo n.º 7
0
  private void forl_statement() {
    System.out.print("for (");
    scan();

    System.out.print("int i = 0; i<=" + tok.string + "; i ++)");
    addBlock();
    System.out.print("{");

    scan();
    block();

    mustbe(TK.ENDFORL);

    System.out.println("}");
    removeBlock();
  }
Ejemplo n.º 8
0
  private void statement_list() {

    while (tok.kind == TK.ID
        || tok.kind == TK.PRINT
        || tok.kind == TK.DO
        || tok.kind == TK.IF
        || tok.kind == TK.TILDE
        || tok.kind == TK.FORL) {

      while (tok.kind == TK.ID || tok.kind == TK.TILDE) {
        // System.out.println(tok + "I am in ID");
        assign();
        // System.out.println(tok + "I am done in here");
      }

      while (is(TK.PRINT)) {

        pr();
      }

      while (is(TK.IF)) {
        If_statement();
      }

      while (is(TK.DO)) {
        Do_statement();
      }

      while (is(TK.FORL)) {
        forl_statement();
      }

      while (is(TK.TILDE)) {
        ref_id();
        if (is(TK.ASSIGN)) {
          System.out.print("=");
          mustbe(TK.ASSIGN);
          expr();
          System.out.println(";");
        }
      }
    } // big while loop
    // System.out.println("out of statement_list");
  }
Ejemplo n.º 9
0
 private void Do_statement() {
   System.out.print("while");
   mustbe(TK.DO);
   guarded_command();
   mustbe(TK.ENDDO);
 }