TreePrinterListener.java 文件源码

@Override
public void visitTerminal(TerminalNode node) {
    String text = Utils.escapeWhitespace(Trees.getNodeText(node, ruleNames), false);
    if(text.startsWith(" ") || text.endsWith(" ")){
        text = "'" + text + "'";
    }
    stack.get(node.getParent()).add(text);
}