ASTUtil.java 文件源码

public static void dumpAST(PrintWriter printer, Tree ast, int ident) {
    char[] identChars = new char[ident];
    Arrays.fill(identChars, ' ');

    if (ast == null) {
        renderNode(identChars, null, printer);
        return;
    }
    for (int i = 0; i < ast.getChildCount(); i++) {
        Tree node = ast.getChild(i);
        if (node == null) {
            throw new NullPointerException("Null AST node");
        }
        renderNode(identChars, node, printer);
        dumpAST(printer, node, ident + 2);
    }
}