trace.java

来自「一个JAVA编写的简单编译器」· Java 代码 · 共 38 行

package util;

public class Trace {
  
  private static int tracedepth = 0;
  
  private static void parsertraceindent () {
    for (int i = 0; i < tracedepth; i++)
      System.out.print ("  ");
  }
  
  public static void begin (String text) {
    if (Options.getpparse()) {
      parsertraceindent ();
      System.out.println ("->" + text);    
      tracedepth++;
    }
  }
  
  public static void end (String text) {
    if (Options.getpparse()) {
      tracedepth--;
      parsertraceindent ();
      System.out.println ("<-" + text);    
    }
  }
  
  public static void symbol (int sy) {
    if (Options.getpscan())
      System.out.println ("sy " + " " + sy + " " + syntax.CKeyWords.getText (sy));
  }
  
  public static void decl (String text) {
    if (Options.getpsymbol())
      System.out.println (text);
    }
 }