//: com:bruceeckel:tools:debug:Assert.java
// From Thinking in Java, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Assertion tool for debugging
package com.bruceeckel.tools.debug;

public class Assert {
  private static void perr(String msg) {
    System.err.println(msg);
  }
  public final static void is_true(boolean exp) {
    if(!exp) perr("Assertion failed");
  }
  public final static void is_false(boolean exp){
    if(exp) perr("Assertion failed");
  }
  public final static void 
  is_true(boolean exp, String msg) {
    if(!exp) perr("Assertion failed: " + msg);
  }
  public final static void 
  is_false(boolean exp, String msg) {
    if(exp) perr("Assertion failed: " + msg);
  }
} ///:~