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

The following examples show how to use com.google.javascript.rhino.Token#NEG . 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_00200_t.java    From coming with MIT License 6 votes vote down vote up 
/**
 * Returns true if this is an immutable value.
 */
static boolean isImmutableValue(Node n) {
  switch (n.getType()) {
    case Token.STRING:
    case Token.NUMBER:
    case Token.NULL:
    case Token.TRUE:
    case Token.FALSE:
      return true;
    case Token.NOT:
      return isImmutableValue(n.getFirstChild());
    case Token.VOID:
    case Token.NEG:
      return isImmutableValue(n.getFirstChild());
    case Token.NAME:
      String name = n.getString();
      // We assume here that programs don't change the value of the keyword
      // undefined to something other than the value undefined.
      return "undefined".equals(name)
          || "Infinity".equals(name)
          || "NaN".equals(name);
  }

  return false;
}
Example 2
Source File: Closure_61_NodeUtil_t.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 3
Source File: Cardumen_0014_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 4
Source File: Closure_78_PeepholeFoldConstants_t.java    From coming with MIT License 5 votes vote down vote up 
@Override
Node optimizeSubtree(Node subtree) {
  switch(subtree.getType()) {
    case Token.CALL:
      return tryFoldKnownMethods(subtree);

    case Token.NEW:
      return tryFoldCtorCall(subtree);

    case Token.TYPEOF:
      return tryFoldTypeof(subtree);

    case Token.NOT:
    case Token.POS:
    case Token.NEG:
    case Token.BITNOT:
      tryReduceOperandsForOp(subtree);
      return tryFoldUnaryOperator(subtree);

    case Token.VOID:
      return tryReduceVoid(subtree);

    default:
      tryReduceOperandsForOp(subtree);
      return tryFoldBinaryOperator(subtree);
  }
}
Example 5
Source File: Closure_94_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 6
Source File: Cardumen_0014_t.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 7
Source File: Closure_10_NodeUtil_s.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Gets the value of a node as a Number, or null if it cannot be converted.
 * When it returns a non-null Double, this method effectively emulates the
 * <code>Number()</code> JavaScript cast function.
 */
static Double getNumberValue(Node n) {
  switch (n.getType()) {
    case Token.TRUE:
      return 1.0;

    case Token.FALSE:
    case Token.NULL:
      return 0.0;

    case Token.NUMBER:
      return n.getDouble();

    case Token.VOID:
      if (mayHaveSideEffects(n.getFirstChild())) {
        return null;
      } else {
        return Double.NaN;
      }

    case Token.NAME:
      // Check for known constants
      String name = n.getString();
      if (name.equals("undefined")) {
        return Double.NaN;
      }
      if (name.equals("NaN")) {
        return Double.NaN;
      }
      if (name.equals("Infinity")) {
        return Double.POSITIVE_INFINITY;
      }
      return null;

    case Token.NEG:
      if (n.getChildCount() == 1 && n.getFirstChild().isName()
          && n.getFirstChild().getString().equals("Infinity")) {
        return Double.NEGATIVE_INFINITY;
      }
      return null;

    case Token.NOT:
      TernaryValue child = getPureBooleanValue(n.getFirstChild());
      if (child != TernaryValue.UNKNOWN) {
        return child.toBoolean(true) ? 0.0 : 1.0; // reversed.
      }
      break;

    case Token.STRING:
      return getStringNumberValue(n.getString());

    case Token.ARRAYLIT:
    case Token.OBJECTLIT:
      String value = getStringValue(n);
      return value != null ? getStringNumberValue(value) : null;
  }

  return null;
}
Example 8
Source File: jKali_003_s.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Gets the value of a node as a Number, or null if it cannot be converted.
 * When it returns a non-null Double, this method effectively emulates the
 * <code>Number()</code> JavaScript cast function.
 */
static Double getNumberValue(Node n) {
  switch (n.getType()) {
    case Token.TRUE:
      return 1.0;

    case Token.FALSE:
    case Token.NULL:
      return 0.0;

    case Token.NUMBER:
      return n.getDouble();

    case Token.VOID:
      if (mayHaveSideEffects(n.getFirstChild())) {
        return null;
      } else {
        return Double.NaN;
      }

    case Token.NAME:
      // Check for known constants
      String name = n.getString();
      if (name.equals("undefined")) {
        return Double.NaN;
      }
      if (name.equals("NaN")) {
        return Double.NaN;
      }
      if (name.equals("Infinity")) {
        return Double.POSITIVE_INFINITY;
      }
      return null;

    case Token.NEG:
      if (n.getChildCount() == 1 && n.getFirstChild().isName()
          && n.getFirstChild().getString().equals("Infinity")) {
        return Double.NEGATIVE_INFINITY;
      }
      return null;

    case Token.NOT:
      TernaryValue child = getPureBooleanValue(n.getFirstChild());
      if (child != TernaryValue.UNKNOWN) {
        return child.toBoolean(true) ? 0.0 : 1.0; // reversed.
      }
      break;

    case Token.STRING:
      return getStringNumberValue(n.getString());

    case Token.ARRAYLIT:
    case Token.OBJECTLIT:
      String value = getStringValue(n);
      return value != null ? getStringNumberValue(value) : null;
  }

  return null;
}
Example 9
Source File: jKali_003_t.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.CALL:
    case Token.GETELEM:
    case Token.GETPROP:
    // Data values
    case Token.ARRAYLIT:
    case Token.EMPTY:  // TODO(johnlenz): remove this.
    case Token.FALSE:
    case Token.FUNCTION:
    case Token.NAME:
    case Token.NULL:
    case Token.NUMBER:
    case Token.OBJECTLIT:
    case Token.REGEXP:
    case Token.STRING:
    case Token.STRING_KEY:
    case Token.THIS:
    case Token.TRUE:
      return 15;

    default: throw new Error("Unknown precedence for " +
                             Token.name(type) +
                             " (type " + type + ")");
  }
}
Example 10
Source File: Closure_86_NodeUtil_t.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 11
Source File: Cardumen_00200_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);

    // Unary 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 12
Source File: jMutRepair_003_s.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Gets the value of a node as a Number, or null if it cannot be converted.
 * When it returns a non-null Double, this method effectively emulates the
 * <code>Number()</code> JavaScript cast function.
 */
static Double getNumberValue(Node n) {
  switch (n.getType()) {
    case Token.TRUE:
      return 1.0;

    case Token.FALSE:
    case Token.NULL:
      return 0.0;

    case Token.NUMBER:
      return n.getDouble();

    case Token.VOID:
      if (mayHaveSideEffects(n.getFirstChild())) {
        return null;
      } else {
        return Double.NaN;
      }

    case Token.NAME:
      // Check for known constants
      String name = n.getString();
      if (name.equals("undefined")) {
        return Double.NaN;
      }
      if (name.equals("NaN")) {
        return Double.NaN;
      }
      if (name.equals("Infinity")) {
        return Double.POSITIVE_INFINITY;
      }
      return null;

    case Token.NEG:
      if (n.getChildCount() == 1 && n.getFirstChild().isName()
          && n.getFirstChild().getString().equals("Infinity")) {
        return Double.NEGATIVE_INFINITY;
      }
      return null;

    case Token.NOT:
      TernaryValue child = getPureBooleanValue(n.getFirstChild());
      if (child != TernaryValue.UNKNOWN) {
        return child.toBoolean(true) ? 0.0 : 1.0; // reversed.
      }
      break;

    case Token.STRING:
      return getStringNumberValue(n.getString());

    case Token.ARRAYLIT:
    case Token.OBJECTLIT:
      String value = getStringValue(n);
      return value != null ? getStringNumberValue(value) : null;
  }

  return null;
}
Example 13
Source File: Closure_80_NodeUtil_t.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 14
Source File: PeepholeFoldConstants.java    From astor with GNU General Public License v2.0 4 votes vote down vote up 
private Node tryFoldUnaryOperator(Node n) {
  Preconditions.checkState(n.hasOneChild());

  Node left = n.getFirstChild();
  Node parent = n.getParent();

  if (left == null) {
    return n;
  }

  TernaryValue leftVal = NodeUtil.getPureBooleanValue(left);
  if (leftVal == TernaryValue.UNKNOWN) {
    return n;
  }

  switch (n.getType()) {
    case Token.NOT:
      // Don't fold !0 and !1 back to false.
      if (late && left.isNumber()) {
        double numValue = left.getDouble();
        if (numValue == 0 || numValue == 1) {
          return n;
        }
      }
      Node replacementNode = NodeUtil.booleanNode(!leftVal.toBoolean(true));
      parent.replaceChild(n, replacementNode);
      reportCodeChange();
      return replacementNode;
    case Token.POS:
      if (NodeUtil.isNumericResult(left)) {
        // POS does nothing to numeric values.
        parent.replaceChild(n, left.detachFromParent());
        reportCodeChange();
        return left;
      }
      return n;
    case Token.NEG:
      if (left.isName()) {
        if (left.getString().equals("Infinity")) {
          // "-Infinity" is valid and a literal, don't modify it.
          return n;
        } else if (left.getString().equals("NaN")) {
          // "-NaN" is "NaN".
          n.removeChild(left);
          parent.replaceChild(n, left);
          reportCodeChange();
          return left;
        }
      }

      if (left.isNumber()) {
        double negNum = -left.getDouble();

        Node negNumNode = IR.number(negNum);
        parent.replaceChild(n, negNumNode);
        reportCodeChange();
        return negNumNode;
      } else {
        // left is not a number node, so do not replace, but warn the
        // user because they can't be doing anything good
        report(NEGATING_A_NON_NUMBER_ERROR, left);
        return n;
      }
    case Token.BITNOT:
      try {
        double val = left.getDouble();
        if (val >= Integer.MIN_VALUE && val <= Integer.MAX_VALUE) {
          int intVal = (int) val;
          if (intVal == val) {
            Node notIntValNode = IR.number(~intVal);
            parent.replaceChild(n, notIntValNode);
            reportCodeChange();
            return notIntValNode;
          } else {
            report(FRACTIONAL_BITWISE_OPERAND, left);
            return n;
          }
        } else {
          report(BITWISE_OPERAND_OUT_OF_RANGE, left);
          return n;
        }
      } catch (UnsupportedOperationException ex) {
        // left is not a number node, so do not replace, but warn the
        // user because they can't be doing anything good
        report(NEGATING_A_NON_NUMBER_ERROR, left);
        return n;
      }
      default:
        return n;
  }
}
Example 15
Source File: Closure_61_NodeUtil_t.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.CALL:
    case Token.GETELEM:
    case Token.GETPROP:
    // Data values
    case Token.ARRAYLIT:
    case Token.EMPTY:  // TODO(johnlenz): remove this.
    case Token.FALSE:
    case Token.FUNCTION:
    case Token.NAME:
    case Token.NULL:
    case Token.NUMBER:
    case Token.OBJECTLIT:
    case Token.REGEXP:
    case Token.STRING:
    case Token.THIS:
    case Token.TRUE:
      return 15;

    default: throw new Error("Unknown precedence for " +
                             Node.tokenToName(type) +
                             " (type " + type + ")");
  }
}
Example 16
Source File: Cardumen_00200_t.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Gets the value of a node as a Number, or null if it cannot be converted.
 * When it returns a non-null Double, this method effectively emulates the
 * <code>Number()</code> JavaScript cast function.
 */
static Double getNumberValue(Node n) {
  switch (n.getType()) {
    case Token.TRUE:
      return 1.0;

    case Token.FALSE:
    case Token.NULL:
      return 0.0;

    case Token.NUMBER:
      return n.getDouble();

    case Token.VOID:
      if (mayHaveSideEffects(n.getFirstChild())) {
        return null;
      } else {
        return Double.NaN;
      }

    case Token.NAME:
      // Check for known constants
      String name = n.getString();
      if (name.equals("undefined")) {
        return Double.NaN;
      }
      if (name.equals("NaN")) {
        return Double.NaN;
      }
      if (name.equals("Infinity")) {
        return Double.POSITIVE_INFINITY;
      }
      return null;

    case Token.NEG:
      if (n.getChildCount() == 1 && n.getFirstChild().isName()
          && n.getFirstChild().getString().equals("Infinity")) {
        return Double.NEGATIVE_INFINITY;
      }
      return null;

    case Token.NOT:
      TernaryValue child = getPureBooleanValue(n.getFirstChild());
      if (child != TernaryValue.UNKNOWN) {
        return child.toBoolean(true) ? 0.0 : 1.0; // reversed.
      }
      break;

    case Token.STRING:
      return getStringNumberValue(n.getString());

    case Token.ARRAYLIT:
    case Token.OBJECTLIT:
      String value = getStringValue(n);
      return value != null ? getStringNumberValue(value) : null;
  }

  return null;
}
Example 17
Source File: Closure_94_NodeUtil_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_75_NodeUtil_s.java    From coming with MIT License 4 votes vote down vote up 
/**
 * Gets the value of a node as a Number, or null if it cannot be converted.
 * When it returns a non-null Double, this method effectively emulates the
 * <code>Number()</code> JavaScript cast function.
 */
static Double getNumberValue(Node n) {
  switch (n.getType()) {
    case Token.TRUE:
      return 1.0;

    case Token.FALSE:
    case Token.NULL:
      return 0.0;

    case Token.NUMBER:
      return n.getDouble();

    case Token.VOID:
      if (mayHaveSideEffects(n.getFirstChild())) {
        return null;
      } else {
        return Double.NaN;
      }

    case Token.NAME:
      // Check for known constants
      String name = n.getString();
      if (name.equals("undefined")) {
        return Double.NaN;
      }
      if (name.equals("NaN")) {
        return Double.NaN;
      }
      if (name.equals("Infinity")) {
        return Double.POSITIVE_INFINITY;
      }
      return null;

    case Token.NEG:
      if (n.getChildCount() == 1 && n.getFirstChild().getType() == Token.NAME
          && n.getFirstChild().getString().equals("Infinity")) {
        return Double.NEGATIVE_INFINITY;
      }
      return null;

    case Token.NOT:
      TernaryValue child = getPureBooleanValue(n.getFirstChild());
      if (child != TernaryValue.UNKNOWN) {
        return child.toBoolean(true) ? 0.0 : 1.0; // reversed.
      }
      break;

    case Token.STRING:
      return getStringNumberValue(n.getString());

    case Token.ARRAYLIT:
    case Token.OBJECTLIT:
      String value = getStringValue(n);
      return value != null ? getStringNumberValue(value) : null;
  }

  return null;
}
Example 19
Source File: Closure_75_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.STRING:
    case Token.THIS:
    case Token.TRUE:
      return 15;

    default: throw new Error("Unknown precedence for " +
                             Node.tokenToName(type) +
                             " (type " + type + ")");
  }
}
Example 20
Source File: NodeUtil.java    From astor 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;
  }
}