// Syntax: void method() no exceptions { doSomething(); }
// (rethrows all inner exceptions as runtime exceptions)
//
// Alternative syntax: void method() ctex { doSomething(); }
// (ctex for catches thrown exceptions or something like that)

!592 1000265 // auto-importer, standard function adder 

public class main {
  public static void main(String[] args) throws Exception {
    String s = loadMainJava();
    
    Pattern regex = Pattern.compile("\\s+(no\\s+exceptions|ctex|null on exception)\\s*\\{");
    
    for (int i = 0; i < 100; i++) {
      Matcher matcher = regex.matcher(s);
      if (!matcher.find())
        break;
      String kind = matcher.group(1);

      System.out.println("Iteration " + (i+1));
      int start = matcher.start(), end = matcher.end();
      int endOfBlock = findEndOfBlock(s, end);
      
      String catchBlock, catchWhat;
      if (kind.startsWith("null")) {
        catchBlock = "return null;";
        catchWhat = "Throwable";
      } else {
        catchBlock = "throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e);";
        catchWhat = "Throwable";
      }
        
      String tryBlock = " { try {\n " +
        s.substring(end, endOfBlock) + "\n} catch (" + catchWhat + " __e) { " + catchBlock + " }";
      s = s.substring(0, start) + tryBlock + s.substring(endOfBlock);
    }
    
    saveMainJava(s);
  }
  
  // start is the index AFTER the opening bracket
  // returns index OF closing bracket
  static int findEndOfBlock(String s, int start) {
    int level = 1;
    for (int i = start; i < s.length(); i++) {
      if (s.charAt(i) == '{') ++level;
      else if (s.charAt(i) == '}') --level;
      if (level == 0)
        return i;
    }
    return s.length();
  }
}