Class AstNode

rhino/src/main/java/org/mozilla/javascript/ast/AstNode.java:53–623

Base class for AST node types. The goal of the AST is to represent the physical source code, to make it useful for code-processing tools such as IDEs or pretty-printers. The parser must not rewrite the parse tree when producing this representation. The AstNode hierarchy sits atop the old

 * distinction in JavaScript is not as clear-cut as in Java or C++.
 */
public abstract class AstNode extends Node implements Comparable<AstNode> {

    protected int position = -1;
    protected int length = 1;
    protected AstNode parent;
    /*
     * Holds comments that are on same line as of actual statement e.g.
     * For a for loop
     *      1) for(var i=0; i<10; i++) //test comment { }
     *      2) for(var i=0; i<10; i++)
     *          //test comment
     *          //test comment 2
     *          { }
     * For If Statement
     *      1) if (x == 2) //test if comment
     *             a = 3 + 4; //then comment
     * and so on
     */
    protected AstNode inlineComment;
    private static final Map<Integer, String> operatorNames = new HashMap<>();

    private static final int MAX_INDENT = 42;
    private static final String[] INDENTATIONS = new String[MAX_INDENT + 1];

    static {
        operatorNames.put(Token.IN, "in");
        operatorNames.put(Token.TYPEOF, "typeof");
        operatorNames.put(Token.INSTANCEOF, "instanceof");
        operatorNames.put(Token.DELPROP, "delete");
        operatorNames.put(Token.COMMA, ",");
        operatorNames.put(Token.COLON, ":");
        operatorNames.put(Token.OR, "||");
        operatorNames.put(Token.NULLISH_COALESCING, "??");
        operatorNames.put(Token.QUESTION_DOT, "?.");
        operatorNames.put(Token.AND, "&&");
        operatorNames.put(Token.INC, "++");
        operatorNames.put(Token.DEC, "--");
        operatorNames.put(Token.BITOR, "|");
        operatorNames.put(Token.BITXOR, "^");
        operatorNames.put(Token.BITAND, "&");
        operatorNames.put(Token.EQ, "==");
        operatorNames.put(Token.NE, "!=");
        operatorNames.put(Token.LT, "<");
        operatorNames.put(Token.GT, ">");
        operatorNames.put(Token.LE, "<=");
        operatorNames.put(Token.GE, ">=");
        operatorNames.put(Token.LSH, "<<");
        operatorNames.put(Token.RSH, ">>");
        operatorNames.put(Token.URSH, ">>>");
        operatorNames.put(Token.ADD, "+");
        operatorNames.put(Token.SUB, "-");
        operatorNames.put(Token.MUL, "*");
        operatorNames.put(Token.DIV, "/");
        operatorNames.put(Token.MOD, "%");
        operatorNames.put(Token.EXP, "**");
        operatorNames.put(Token.NOT, "!");
        operatorNames.put(Token.BITNOT, "~");
        operatorNames.put(Token.POS, "+");