Java Code Examples for com.google.javascript.rhino.Token#RSH

The following examples show how to use com.google.javascript.rhino.Token#RSH . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: Cardumen_0014_t.java    From coming with MIT License 5 votes vote down vote up 
static int getOpFromAssignmentOp(Node n) {
  switch (n.getType()){
    case Token.ASSIGN_BITOR:
      return Token.BITOR;
    case Token.ASSIGN_BITXOR:
      return Token.BITXOR;
    case Token.ASSIGN_BITAND:
      return Token.BITAND;
    case Token.ASSIGN_LSH:
      return Token.LSH;
    case Token.ASSIGN_RSH:
      return Token.RSH;
    case Token.ASSIGN_URSH:
      return Token.URSH;
    case Token.ASSIGN_ADD:
      return Token.ADD;
    case Token.ASSIGN_SUB:
      return Token.SUB;
    case Token.ASSIGN_MUL:
      return Token.MUL;
    case Token.ASSIGN_DIV:
      return Token.DIV;
    case Token.ASSIGN_MOD:
      return Token.MOD;
  }
  throw new IllegalArgumentException("Not an assignment op:" + n);
}
Example 2
Source File: Cardumen_00149_s.java    From coming with MIT License 5 votes vote down vote up 
/**
 * A "simple" operator is one whose children are expressions,
 * has no direct side-effects (unlike '+='), and has no
 * conditional aspects (unlike '||').
 */
static boolean isSimpleOperatorType(int type) {
  switch (type) {
    case Token.ADD:
    case Token.BITAND:
    case Token.BITNOT:
    case Token.BITOR:
    case Token.BITXOR:
    case Token.COMMA:
    case Token.DIV:
    case Token.EQ:
    case Token.GE:
    case Token.GETELEM:
    case Token.GETPROP:
    case Token.GT:
    case Token.INSTANCEOF:
    case Token.LE:
    case Token.LSH:
    case Token.LT:
    case Token.MOD:
    case Token.MUL:
    case Token.NE:
    case Token.NOT:
    case Token.RSH:
    case Token.SHEQ:
    case Token.SHNE:
    case Token.SUB:
    case Token.TYPEOF:
    case Token.VOID:
    case Token.POS:
    case Token.NEG:
    case Token.URSH:
      return true;

    default:
      return false;
  }
}
Example 3
Source File: Cardumen_00149_s.java    From coming with MIT License 5 votes vote down vote up 
static int getOpFromAssignmentOp(Node n) {
  switch (n.getType()){
    case Token.ASSIGN_BITOR:
      return Token.BITOR;
    case Token.ASSIGN_BITXOR:
      return Token.BITXOR;
    case Token.ASSIGN_BITAND:
      return Token.BITAND;
    case Token.ASSIGN_LSH:
      return Token.LSH;
    case Token.ASSIGN_RSH:
      return Token.RSH;
    case Token.ASSIGN_URSH:
      return Token.URSH;
    case Token.ASSIGN_ADD:
      return Token.ADD;
    case Token.ASSIGN_SUB:
      return Token.SUB;
    case Token.ASSIGN_MUL:
      return Token.MUL;
    case Token.ASSIGN_DIV:
      return Token.DIV;
    case Token.ASSIGN_MOD:
      return Token.MOD;
  }
  throw new IllegalArgumentException("Not an assignment op:" + n);
}
Example 4
Source File: Closure_10_NodeUtil_t.java    From coming with MIT License 5 votes vote down vote up 
/**
 * A "simple" operator is one whose children are expressions,
 * has no direct side-effects (unlike '+='), and has no
 * conditional aspects (unlike '||').
 */
static boolean isSimpleOperatorType(int type) {
  switch (type) {
    case Token.ADD:
    case Token.BITAND:
    case Token.BITNOT:
    case Token.BITOR:
    case Token.BITXOR:
    case Token.COMMA:
    case Token.DIV:
    case Token.EQ:
    case Token.GE:
    case Token.GETELEM:
    case Token.GETPROP:
    case Token.GT:
    case Token.INSTANCEOF:
    case Token.LE:
    case Token.LSH:
    case Token.LT:
    case Token.MOD:
    case Token.MUL:
    case Token.NE:
    case Token.NOT:
    case Token.RSH:
    case Token.SHEQ:
    case Token.SHNE:
    case Token.SUB:
    case Token.TYPEOF:
    case Token.VOID:
    case Token.POS:
    case Token.NEG:
    case Token.URSH:
      return true;

    default:
      return false;
  }
}
Example 5
Source File: jKali_003_s.java    From coming with MIT License 5 votes vote down vote up 
static boolean isNumericResultHelper(Node n) {
  switch (n.getType()) {
    case Token.ADD:
      return !mayBeString(n.getFirstChild())
          && !mayBeString(n.getLastChild());
    case Token.BITNOT:
    case Token.BITOR:
    case Token.BITXOR:
    case Token.BITAND:
    case Token.LSH:
    case Token.RSH:
    case Token.URSH:
    case Token.SUB:
    case Token.MUL:
    case Token.MOD:
    case Token.DIV:
    case Token.INC:
    case Token.DEC:
    case Token.POS:
    case Token.NEG:
    case Token.NUMBER:
      return true;
    case Token.NAME:
      String name = n.getString();
      if (name.equals("NaN")) {
        return true;
      }
      if (name.equals("Infinity")) {
        return true;
      }
      return false;
    default:
      return false;
  }
}
Example 6
Source File: Closure_60_NodeUtil_t.java    From coming with MIT License 5 votes vote down vote up 
/**
 * A "simple" operator is one whose children are expressions,
 * has no direct side-effects (unlike '+='), and has no
 * conditional aspects (unlike '||').
 */
static boolean isSimpleOperatorType(int type) {
  switch (type) {
    case Token.ADD:
    case Token.BITAND:
    case Token.BITNOT:
    case Token.BITOR:
    case Token.BITXOR:
    case Token.COMMA:
    case Token.DIV:
    case Token.EQ:
    case Token.GE:
    case Token.GETELEM:
    case Token.GETPROP:
    case Token.GT:
    case Token.INSTANCEOF:
    case Token.LE:
    case Token.LSH:
    case Token.LT:
    case Token.MOD:
    case Token.MUL:
    case Token.NE:
    case Token.NOT:
    case Token.RSH:
    case Token.SHEQ:
    case Token.SHNE:
    case Token.SUB:
    case Token.TYPEOF:
    case Token.VOID:
    case Token.POS:
    case Token.NEG:
    case Token.URSH:
      return true;

    default:
      return false;
  }
}
Example 7
Source File: Closure_80_NodeUtil_t.java    From coming with MIT License 5 votes vote down vote up 
static int getOpFromAssignmentOp(Node n) {
  switch (n.getType()){
    case Token.ASSIGN_BITOR:
      return Token.BITOR;
    case Token.ASSIGN_BITXOR:
      return Token.BITXOR;
    case Token.ASSIGN_BITAND:
      return Token.BITAND;
    case Token.ASSIGN_LSH:
      return Token.LSH;
    case Token.ASSIGN_RSH:
      return Token.RSH;
    case Token.ASSIGN_URSH:
      return Token.URSH;
    case Token.ASSIGN_ADD:
      return Token.ADD;
    case Token.ASSIGN_SUB:
      return Token.SUB;
    case Token.ASSIGN_MUL:
      return Token.MUL;
    case Token.ASSIGN_DIV:
      return Token.DIV;
    case Token.ASSIGN_MOD:
      return Token.MOD;
  }
  throw new IllegalArgumentException("Not an assiment op");
}
Example 8
Source File: Closure_74_PeepholeFoldConstants_s.java    From coming with MIT License 5 votes vote down vote up 
private void tryReduceOperandsForOp(Node n) {
  switch (n.getType()) {
    case Token.ADD:
      Node left = n.getFirstChild();
      Node right = n.getLastChild();
      if (!NodeUtil.mayBeString(left) && !NodeUtil.mayBeString(right)) {
        tryConvertOperandsToNumber(n);
      }
      break;
    case Token.ASSIGN_BITOR:
    case Token.ASSIGN_BITXOR:
    case Token.ASSIGN_BITAND:
      // TODO(johnlenz): convert these to integers.
    case Token.ASSIGN_LSH:
    case Token.ASSIGN_RSH:
    case Token.ASSIGN_URSH:
    case Token.ASSIGN_SUB:
    case Token.ASSIGN_MUL:
    case Token.ASSIGN_MOD:
    case Token.ASSIGN_DIV:
      tryConvertToNumber(n.getLastChild());
      break;
    case Token.BITNOT:
    case Token.BITOR:
    case Token.BITXOR:
    case Token.BITAND:
    case Token.LSH:
    case Token.RSH:
    case Token.URSH:
    case Token.SUB:
    case Token.MUL:
    case Token.MOD:
    case Token.DIV:
    case Token.POS:
    case Token.NEG:
      tryConvertOperandsToNumber(n);
      break;
  }
}
Example 9
Source File: jMutRepair_003_s.java    From coming with MIT License 5 votes vote down vote up 
/**
 * A "simple" operator is one whose children are expressions,
 * has no direct side-effects (unlike '+='), and has no
 * conditional aspects (unlike '||').
 */
static boolean isSimpleOperatorType(int type) {
  switch (type) {
    case Token.ADD:
    case Token.BITAND:
    case Token.BITNOT:
    case Token.BITOR:
    case Token.BITXOR:
    case Token.COMMA:
    case Token.DIV:
    case Token.EQ:
    case Token.GE:
    case Token.GETELEM:
    case Token.GETPROP:
    case Token.GT:
    case Token.INSTANCEOF:
    case Token.LE:
    case Token.LSH:
    case Token.LT:
    case Token.MOD:
    case Token.MUL:
    case Token.NE:
    case Token.NOT:
    case Token.RSH:
    case Token.SHEQ:
    case Token.SHNE:
    case Token.SUB:
    case Token.TYPEOF:
    case Token.VOID:
    case Token.POS:
    case Token.NEG:
    case Token.URSH:
      return true;

    default:
      return false;
  }
}
Example 10
Source File: Closure_97_PeepholeFoldConstants_t.java    From coming with MIT License 4 votes vote down vote up 
private Node tryFoldAssign(Node n, Node left, Node right) {
  Preconditions.checkArgument(n.getType() == Token.ASSIGN);

  // Tries to convert x = x + y -> x += y;
  if (!right.hasChildren() ||
      right.getFirstChild().getNext() != right.getLastChild()) {
    // RHS must have two children.
    return n;
  }

  if (NodeUtil.mayHaveSideEffects(left)) {
    return n;
  }

  Node leftChild = right.getFirstChild();
  if (!areNodesEqualForInlining(left, leftChild)) {
    return n;
  }

  int newType = -1;
  switch (right.getType()) {
    case Token.ADD:
      newType = Token.ASSIGN_ADD;
      break;
    case Token.BITAND:
      newType = Token.ASSIGN_BITAND;
      break;
    case Token.BITOR:
      newType = Token.ASSIGN_BITOR;
      break;
    case Token.BITXOR:
      newType = Token.ASSIGN_BITXOR;
      break;
    case Token.DIV:
      newType = Token.ASSIGN_DIV;
      break;
    case Token.LSH:
      newType = Token.ASSIGN_LSH;
      break;
    case Token.MOD:
      newType = Token.ASSIGN_MOD;
      break;
    case Token.MUL:
      newType = Token.ASSIGN_MUL;
      break;
    case Token.RSH:
      newType = Token.ASSIGN_RSH;
      break;
    case Token.SUB:
      newType = Token.ASSIGN_SUB;
      break;
    case Token.URSH:
      newType = Token.ASSIGN_URSH;
      break;
    default:
      return n;
  }

  Node newNode = new Node(newType,
      left.detachFromParent(), right.getLastChild().detachFromParent());
  n.getParent().replaceChild(n, newNode);

  reportCodeChange();

  return newNode;
}
Example 11
Source File: 1_NodeUtil.java    From SimFix with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Converts an operator's token value (see {@link Token}) to a string
 * representation.
 *
 * @param operator the operator's token value to convert
 * @return the string representation or {@code null} if the token value is
 * not an operator
 */
static String opToStr(int operator) {
  switch (operator) {
    case Token.BITOR: return "|";
    case Token.OR: return "||";
    case Token.BITXOR: return "^";
    case Token.AND: return "&&";
    case Token.BITAND: return "&";
    case Token.SHEQ: return "===";
    case Token.EQ: return "==";
    case Token.NOT: return "!";
    case Token.NE: return "!=";
    case Token.SHNE: return "!==";
    case Token.LSH: return "<<";
    case Token.IN: return "in";
    case Token.LE: return "<=";
    case Token.LT: return "<";
    case Token.URSH: return ">>>";
    case Token.RSH: return ">>";
    case Token.GE: return ">=";
    case Token.GT: return ">";
    case Token.MUL: return "*";
    case Token.DIV: return "/";
    case Token.MOD: return "%";
    case Token.BITNOT: return "~";
    case Token.ADD: return "+";
    case Token.SUB: return "-";
    case Token.POS: return "+";
    case Token.NEG: return "-";
    case Token.ASSIGN: return "=";
    case Token.ASSIGN_BITOR: return "|=";
    case Token.ASSIGN_BITXOR: return "^=";
    case Token.ASSIGN_BITAND: return "&=";
    case Token.ASSIGN_LSH: return "<<=";
    case Token.ASSIGN_RSH: return ">>=";
    case Token.ASSIGN_URSH: return ">>>=";
    case Token.ASSIGN_ADD: return "+=";
    case Token.ASSIGN_SUB: return "-=";
    case Token.ASSIGN_MUL: return "*=";
    case Token.ASSIGN_DIV: return "/=";
    case Token.ASSIGN_MOD: return "%=";
    case Token.VOID: return "void";
    case Token.TYPEOF: return "typeof";
    case Token.INSTANCEOF: return "instanceof";
    default: return null;
  }
}
Example 12
Source File: Closure_23_PeepholeFoldConstants_s.java    From coming with MIT License 4 votes vote down vote up 
private Node tryFoldAssign(Node n, Node left, Node right) {
  Preconditions.checkArgument(n.isAssign());

  if (!late) {
    return n;
  }

  // Tries to convert x = x + y -> x += y;
  if (!right.hasChildren() ||
      right.getFirstChild().getNext() != right.getLastChild()) {
    // RHS must have two children.
    return n;
  }

  if (mayHaveSideEffects(left)) {
    return n;
  }

  Node newRight;
  if (areNodesEqualForInlining(left, right.getFirstChild())) {
    newRight = right.getLastChild();
  } else if (NodeUtil.isCommutative(right.getType()) &&
        areNodesEqualForInlining(left, right.getLastChild())) {
    newRight = right.getFirstChild();
  } else {
    return n;
  }

  int newType = -1;
  switch (right.getType()) {
    case Token.ADD:
      newType = Token.ASSIGN_ADD;
      break;
    case Token.BITAND:
      newType = Token.ASSIGN_BITAND;
      break;
    case Token.BITOR:
      newType = Token.ASSIGN_BITOR;
      break;
    case Token.BITXOR:
      newType = Token.ASSIGN_BITXOR;
      break;
    case Token.DIV:
      newType = Token.ASSIGN_DIV;
      break;
    case Token.LSH:
      newType = Token.ASSIGN_LSH;
      break;
    case Token.MOD:
      newType = Token.ASSIGN_MOD;
      break;
    case Token.MUL:
      newType = Token.ASSIGN_MUL;
      break;
    case Token.RSH:
      newType = Token.ASSIGN_RSH;
      break;
    case Token.SUB:
      newType = Token.ASSIGN_SUB;
      break;
    case Token.URSH:
      newType = Token.ASSIGN_URSH;
      break;
    default:
      return n;
  }

  Node newNode = new Node(newType,
      left.detachFromParent(), newRight.detachFromParent());
  n.getParent().replaceChild(n, newNode);

  reportCodeChange();

  return newNode;
}
Example 13
Source File: Closure_60_NodeUtil_s.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Converts an operator's token value (see {@link Token}) to a string
 * representation.
 *
 * @param operator the operator's token value to convert
 * @return the string representation or {@code null} if the token value is
 * not an operator
 */
static String opToStr(int operator) {
  switch (operator) {
    case Token.BITOR: return "|";
    case Token.OR: return "||";
    case Token.BITXOR: return "^";
    case Token.AND: return "&&";
    case Token.BITAND: return "&";
    case Token.SHEQ: return "===";
    case Token.EQ: return "==";
    case Token.NOT: return "!";
    case Token.NE: return "!=";
    case Token.SHNE: return "!==";
    case Token.LSH: return "<<";
    case Token.IN: return "in";
    case Token.LE: return "<=";
    case Token.LT: return "<";
    case Token.URSH: return ">>>";
    case Token.RSH: return ">>";
    case Token.GE: return ">=";
    case Token.GT: return ">";
    case Token.MUL: return "*";
    case Token.DIV: return "/";
    case Token.MOD: return "%";
    case Token.BITNOT: return "~";
    case Token.ADD: return "+";
    case Token.SUB: return "-";
    case Token.POS: return "+";
    case Token.NEG: return "-";
    case Token.ASSIGN: return "=";
    case Token.ASSIGN_BITOR: return "|=";
    case Token.ASSIGN_BITXOR: return "^=";
    case Token.ASSIGN_BITAND: return "&=";
    case Token.ASSIGN_LSH: return "<<=";
    case Token.ASSIGN_RSH: return ">>=";
    case Token.ASSIGN_URSH: return ">>>=";
    case Token.ASSIGN_ADD: return "+=";
    case Token.ASSIGN_SUB: return "-=";
    case Token.ASSIGN_MUL: return "*=";
    case Token.ASSIGN_DIV: return "/=";
    case Token.ASSIGN_MOD: return "%=";
    case Token.VOID: return "void";
    case Token.TYPEOF: return "typeof";
    case Token.INSTANCEOF: return "instanceof";
    default: return null;
  }
}
Example 14
Source File: Closure_86_NodeUtil_s.java    From coming with MIT License 4 votes vote down vote up 
static int precedence(int type) {
  switch (type) {
    case Token.COMMA:  return 0;
    case Token.ASSIGN_BITOR:
    case Token.ASSIGN_BITXOR:
    case Token.ASSIGN_BITAND:
    case Token.ASSIGN_LSH:
    case Token.ASSIGN_RSH:
    case Token.ASSIGN_URSH:
    case Token.ASSIGN_ADD:
    case Token.ASSIGN_SUB:
    case Token.ASSIGN_MUL:
    case Token.ASSIGN_DIV:
    case Token.ASSIGN_MOD:
    case Token.ASSIGN: return 1;
    case Token.HOOK:   return 2;  // ?: operator
    case Token.OR:     return 3;
    case Token.AND:    return 4;
    case Token.BITOR:  return 5;
    case Token.BITXOR: return 6;
    case Token.BITAND: return 7;
    case Token.EQ:
    case Token.NE:
    case Token.SHEQ:
    case Token.SHNE:   return 8;
    case Token.LT:
    case Token.GT:
    case Token.LE:
    case Token.GE:
    case Token.INSTANCEOF:
    case Token.IN:     return 9;
    case Token.LSH:
    case Token.RSH:
    case Token.URSH:   return 10;
    case Token.SUB:
    case Token.ADD:    return 11;
    case Token.MUL:
    case Token.MOD:
    case Token.DIV:    return 12;
    case Token.INC:
    case Token.DEC:
    case Token.NEW:
    case Token.DELPROP:
    case Token.TYPEOF:
    case Token.VOID:
    case Token.NOT:
    case Token.BITNOT:
    case Token.POS:
    case Token.NEG:    return 13;

    case Token.ARRAYLIT:
    case Token.CALL:
    case Token.EMPTY:
    case Token.FALSE:
    case Token.FUNCTION:
    case Token.GETELEM:
    case Token.GETPROP:
    case Token.GET_REF:
    case Token.IF:
    case Token.LP:
    case Token.NAME:
    case Token.NULL:
    case Token.NUMBER:
    case Token.OBJECTLIT:
    case Token.REGEXP:
    case Token.RETURN:
    case Token.STRING:
    case Token.THIS:
    case Token.TRUE:
      return 15;

    default: throw new Error("Unknown precedence for " +
                             Node.tokenToName(type) +
                             " (type " + type + ")");
  }
}
Example 15
Source File: Closure_78_PeepholeFoldConstants_s.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Try to fold shift operations
 */
private Node tryFoldShift(Node n, Node left, Node right) {
  if (left.getType() == Token.NUMBER &&
      right.getType() == Token.NUMBER) {

    double result;
    double lval = left.getDouble();
    double rval = right.getDouble();

    // check ranges.  We do not do anything that would clip the double to
    // a 32-bit range, since the user likely does not intend that.
    if (!(lval >= Integer.MIN_VALUE && lval <= Integer.MAX_VALUE)) {
      error(BITWISE_OPERAND_OUT_OF_RANGE, left);
      return n;
    }

    // only the lower 5 bits are used when shifting, so don't do anything
    // if the shift amount is outside [0,32)
    if (!(rval >= 0 && rval < 32)) {
      error(SHIFT_AMOUNT_OUT_OF_BOUNDS, right);
      return n;
    }

    // Convert the numbers to ints
    int lvalInt = (int) lval;
    if (lvalInt != lval) {
      error(FRACTIONAL_BITWISE_OPERAND, left);
      return n;
    }

    int rvalInt = (int) rval;
    if (rvalInt != rval) {
      error(FRACTIONAL_BITWISE_OPERAND, right);
      return n;
    }

    switch (n.getType()) {
      case Token.LSH:
        result = lvalInt << rvalInt;
        break;
      case Token.RSH:
        result = lvalInt >> rvalInt;
        break;
      case Token.URSH:
        // JavaScript handles zero shifts on signed numbers differently than
        // Java as an Java int can not represent the unsigned 32-bit number
        // where JavaScript can so use a long here.
        long lvalLong = lvalInt & 0xffffffffL;
        result = lvalLong >>> rvalInt;
        break;
      default:
        throw new AssertionError("Unknown shift operator: " +
            Node.tokenToName(n.getType()));
    }

    Node newNumber = Node.newNumber(result);
    n.getParent().replaceChild(n, newNumber);
    reportCodeChange();

    return newNumber;
  }

  return n;
}
Example 16
Source File: Closure_96_TypeCheck_t.java    From coming with MIT License 4 votes vote down vote up 
/**
 * This function unifies the type checking involved in the core binary
 * operators and the corresponding assignment operators.  The representation
 * used internally is such that common code can handle both kinds of
 * operators easily.
 *
 * @param op The operator.
 * @param t The traversal object, needed to report errors.
 * @param n The node being checked.
 */
private void visitBinaryOperator(int op, NodeTraversal t, Node n) {
  Node left = n.getFirstChild();
  JSType leftType = getJSType(left);
  Node right = n.getLastChild();
  JSType rightType = getJSType(right);
  switch (op) {
    case Token.ASSIGN_LSH:
    case Token.ASSIGN_RSH:
    case Token.LSH:
    case Token.RSH:
    case Token.ASSIGN_URSH:
    case Token.URSH:
      if (!leftType.matchesInt32Context()) {
        report(t, left, BIT_OPERATION,
                 NodeUtil.opToStr(n.getType()), leftType.toString());
      }
      if (!rightType.matchesUint32Context()) {
        report(t, right, BIT_OPERATION,
                 NodeUtil.opToStr(n.getType()), rightType.toString());
      }
      break;

    case Token.ASSIGN_DIV:
    case Token.ASSIGN_MOD:
    case Token.ASSIGN_MUL:
    case Token.ASSIGN_SUB:
    case Token.DIV:
    case Token.MOD:
    case Token.MUL:
    case Token.SUB:
      validator.expectNumber(t, left, leftType, "left operand");
      validator.expectNumber(t, right, rightType, "right operand");
      break;

    case Token.ASSIGN_BITAND:
    case Token.ASSIGN_BITXOR:
    case Token.ASSIGN_BITOR:
    case Token.BITAND:
    case Token.BITXOR:
    case Token.BITOR:
      validator.expectBitwiseable(t, left, leftType,
          "bad left operand to bitwise operator");
      validator.expectBitwiseable(t, right, rightType,
          "bad right operand to bitwise operator");
      break;

    case Token.ASSIGN_ADD:
    case Token.ADD:
      break;

    default:
      report(t, n, UNEXPECTED_TOKEN, Node.tokenToName(op));
  }
  ensureTyped(t, n);
}
Example 17
Source File: Cardumen_00149_t.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Converts an operator's token value (see {@link Token}) to a string
 * representation.
 *
 * @param operator the operator's token value to convert
 * @return the string representation or {@code null} if the token value is
 * not an operator
 */
static String opToStr(int operator) {
  switch (operator) {
    case Token.BITOR: return "|";
    case Token.OR: return "||";
    case Token.BITXOR: return "^";
    case Token.AND: return "&&";
    case Token.BITAND: return "&";
    case Token.SHEQ: return "===";
    case Token.EQ: return "==";
    case Token.NOT: return "!";
    case Token.NE: return "!=";
    case Token.SHNE: return "!==";
    case Token.LSH: return "<<";
    case Token.IN: return "in";
    case Token.LE: return "<=";
    case Token.LT: return "<";
    case Token.URSH: return ">>>";
    case Token.RSH: return ">>";
    case Token.GE: return ">=";
    case Token.GT: return ">";
    case Token.MUL: return "*";
    case Token.DIV: return "/";
    case Token.MOD: return "%";
    case Token.BITNOT: return "~";
    case Token.ADD: return "+";
    case Token.SUB: return "-";
    case Token.POS: return "+";
    case Token.NEG: return "-";
    case Token.ASSIGN: return "=";
    case Token.ASSIGN_BITOR: return "|=";
    case Token.ASSIGN_BITXOR: return "^=";
    case Token.ASSIGN_BITAND: return "&=";
    case Token.ASSIGN_LSH: return "<<=";
    case Token.ASSIGN_RSH: return ">>=";
    case Token.ASSIGN_URSH: return ">>>=";
    case Token.ASSIGN_ADD: return "+=";
    case Token.ASSIGN_SUB: return "-=";
    case Token.ASSIGN_MUL: return "*=";
    case Token.ASSIGN_DIV: return "/=";
    case Token.ASSIGN_MOD: return "%=";
    case Token.VOID: return "void";
    case Token.TYPEOF: return "typeof";
    case Token.INSTANCEOF: return "instanceof";
    default: return null;
  }
}
Example 18
Source File: Closure_74_PeepholeFoldConstants_s.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Try to fold shift operations
 */
private Node tryFoldShift(Node n, Node left, Node right) {
  if (left.getType() == Token.NUMBER &&
      right.getType() == Token.NUMBER) {

    double result;
    double lval = left.getDouble();
    double rval = right.getDouble();

    // check ranges.  We do not do anything that would clip the double to
    // a 32-bit range, since the user likely does not intend that.
    if (!(lval >= Integer.MIN_VALUE && lval <= Integer.MAX_VALUE)) {
      error(BITWISE_OPERAND_OUT_OF_RANGE, left);
      return n;
    }

    // only the lower 5 bits are used when shifting, so don't do anything
    // if the shift amount is outside [0,32)
    if (!(rval >= 0 && rval < 32)) {
      error(SHIFT_AMOUNT_OUT_OF_BOUNDS, right);
      return n;
    }

    // Convert the numbers to ints
    int lvalInt = (int) lval;
    if (lvalInt != lval) {
      error(FRACTIONAL_BITWISE_OPERAND, left);
      return n;
    }

    int rvalInt = (int) rval;
    if (rvalInt != rval) {
      error(FRACTIONAL_BITWISE_OPERAND, right);
      return n;
    }

    switch (n.getType()) {
      case Token.LSH:
        result = lvalInt << rvalInt;
        break;
      case Token.RSH:
        result = lvalInt >> rvalInt;
        break;
      case Token.URSH:
        // JavaScript handles zero shifts on signed numbers differently than
        // Java as an Java int can not represent the unsigned 32-bit number
        // where JavaScript can so use a long here.
        long lvalLong = lvalInt & 0xffffffffL;
        result = lvalLong >>> rvalInt;
        break;
      default:
        throw new AssertionError("Unknown shift operator: " +
            Node.tokenToName(n.getType()));
    }

    Node newNumber = Node.newNumber(result);
    n.getParent().replaceChild(n, newNumber);
    reportCodeChange();

    return newNumber;
  }

  return n;
}
Example 19
Source File: Closure_61_NodeUtil_s.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Determines whether the given value may be assigned to a define.
 *
 * @param val The value being assigned.
 * @param defines The list of names of existing defines.
 */
static boolean isValidDefineValue(Node val, Set<String> defines) {
  switch (val.getType()) {
    case Token.STRING:
    case Token.NUMBER:
    case Token.TRUE:
    case Token.FALSE:
      return true;

    // Binary operators are only valid if both children are valid.
    case Token.ADD:
    case Token.BITAND:
    case Token.BITNOT:
    case Token.BITOR:
    case Token.BITXOR:
    case Token.DIV:
    case Token.EQ:
    case Token.GE:
    case Token.GT:
    case Token.LE:
    case Token.LSH:
    case Token.LT:
    case Token.MOD:
    case Token.MUL:
    case Token.NE:
    case Token.RSH:
    case Token.SHEQ:
    case Token.SHNE:
    case Token.SUB:
    case Token.URSH:
      return isValidDefineValue(val.getFirstChild(), defines)
          && isValidDefineValue(val.getLastChild(), defines);

    // Uniary operators are valid if the child is valid.
    case Token.NOT:
    case Token.NEG:
    case Token.POS:
      return isValidDefineValue(val.getFirstChild(), defines);

    // Names are valid if and only if they are defines themselves.
    case Token.NAME:
    case Token.GETPROP:
      if (val.isQualifiedName()) {
        return defines.contains(val.getQualifiedName());
      }
  }
  return false;
}
Example 20
Source File: Closure_97_PeepholeFoldConstants_s.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Try to fold shift operations
 */
private Node tryFoldShift(Node n, Node left, Node right) {
  if (left.getType() == Token.NUMBER &&
      right.getType() == Token.NUMBER) {

    double result;
    double lval = left.getDouble();
    double rval = right.getDouble();

    // check ranges.  We do not do anything that would clip the double to
    // a 32-bit range, since the user likely does not intend that.
    if (!(lval >= Integer.MIN_VALUE && lval <= Integer.MAX_VALUE)) {
      error(BITWISE_OPERAND_OUT_OF_RANGE, left);
      return n;
    }

    // only the lower 5 bits are used when shifting, so don't do anything
    // if the shift amount is outside [0,32)
    if (!(rval >= 0 && rval < 32)) {
      error(SHIFT_AMOUNT_OUT_OF_BOUNDS, right);
      return n;
    }

    // Convert the numbers to ints
    int lvalInt = (int) lval;
    if (lvalInt != lval) {
      error(FRACTIONAL_BITWISE_OPERAND, left);
      return n;
    }

    int rvalInt = (int) rval;
    if (rvalInt != rval) {
      error(FRACTIONAL_BITWISE_OPERAND, right);
      return n;
    }

    switch (n.getType()) {
      case Token.LSH:
        result = lvalInt << rvalInt;
        break;
      case Token.RSH:
        result = lvalInt >> rvalInt;
        break;
      case Token.URSH:
        // JavaScript handles zero shifts on signed numbers differently than
        // Java as an Java int can not represent the unsigned 32-bit number
        // where JavaScript can so use a long here.
        result = lvalInt >>> rvalInt;
        break;
      default:
        throw new AssertionError("Unknown shift operator: " +
            Node.tokenToName(n.getType()));
    }

    Node newNumber = Node.newNumber(result);
    n.getParent().replaceChild(n, newNumber);
    reportCodeChange();

    return newNumber;
  }

  return n;
}