text: // This file is automatically generated by scheme2js, except for the
  // benchmark harness code at the beginning and end of the file.
  
  /************* GENERATED FILE - DO NOT EDIT *************/
  /************* GENERATED FILE - DO NOT EDIT *************/
  /************* GENERATED FILE - DO NOT EDIT *************/
  /************* GENERATED FILE - DO NOT EDIT *************/
  /************* GENERATED FILE - DO NOT EDIT *************/
  /************* GENERATED FILE - DO NOT EDIT *************/
  /************* GENERATED FILE - DO NOT EDIT *************/
  /************* GENERATED FILE - DO NOT EDIT *************/
  /*
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   * Simply setting SC_DEFAULT_OUT and SC_ERROR_OUT to the desired values
   * should do the trick.
   * In the following example the std-out and error-port are redirected to
   * a DIV.
  function initRuntime() {
      function escapeHTML(s) {
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  	tmp = tmp.replace(/&/g, "&amp;");
  	tmp = tmp.replace(/</g, "&lt;");
  	tmp = tmp.replace(/>/g, "&gt;");
  	tmp = tmp.replace(/ /g, "&nbsp;");
  	tmp = tmp.replace(/\n/g, "<br />");
  	tmp = tmp.replace(/\t/g, "&nbsp;&nbsp;&nbsp;&nbsp");
  	return tmp;
  	
      }
  
      document.write("<div id='stdout'></div>");
      SC_DEFAULT_OUT = new sc_GenericOutputPort(
  	function(s) {
  	    var stdout = document.getElementById('stdout');
  	    stdout.innerHTML = stdout.innerHTML + escapeHTML(s);
  	});
      SC_ERROR_OUT = SC_DEFAULT_OUT;
  }
  */
  
  
  function sc_print_debug() {
      sc_print.apply(null, arguments);
  }
  /*** META ((export *js*)) */
  var sc_JS_GLOBALS = this;
  
  var __sc_LINE=-1;
  var __sc_FILE="";
  
  /*** META ((export #t)) */
  function sc_alert() {
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     var s = "";
     var i;
  
     for( i = 0; i < len; i++ ) {
         s += sc_toDisplayString(arguments[ i ]);
     }
  
     return alert( s );
  }
  
  /*** META ((export #t)) */
  function sc_typeof( x ) {
     return typeof x;
  }
  
  /*** META ((export #t)) */
  function sc_error() {
      var a = [sc_jsstring2symbol("*error*")];
      for (var i = 0; i < arguments.length; i++) {
  	a[i+1] = arguments[i];
      }
      throw a;
  }
  
  /*** META ((export #t)
             (peephole (prefix "throw ")))
  */
  function sc_raise(obj) {
      throw obj;
  }
  
  /*** META ((export with-handler-lambda)) */
  function sc_withHandlerLambda(handler, body) {
      try {
  	return body();
      } catch(e) {
  	if (!e._internalException)
  	    return handler(e);
  	else
  	    throw e;
      }
  }
  
  var sc_properties = new Object();
  
  /*** META ((export #t)) */
  function sc_putpropBang(sym, key, val) {
      var ht = sc_properties[sym];
      if (!ht) {
  	ht = new Object();
  	sc_properties[sym] = ht;
      }
      ht[key] = val;
  }
  
  /*** META ((export #t)) */
  function sc_getprop(sym, key) {
      var ht = sc_properties[sym];
      if (ht) {
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  	else
  	    return false;
      } else
  	return false;
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  /*** META ((export #t)) */
  function sc_rempropBang(sym, key) {
      var ht = sc_properties[sym];
      if (ht)
  	delete ht[key];
  }
  
  /*** META ((export #t)) */
  function sc_any2String(o) {
      return jsstring2string(sc_toDisplayString(o));
  }
  
  /*** META ((export #t)
             (peephole (infix 2 2 "==="))
             (type bool))
  */
  function sc_isEqv(o1, o2) {
      return (o1 === o2);
  }
  
  /*** META ((export #t)
             (peephole (infix 2 2 "==="))
             (type bool))
  */
  function sc_isEq(o1, o2) {
      return (o1 === o2);
  }
  
  /*** META ((export #t)
             (type bool))
  */
  function sc_isNumber(n) {
      return (typeof n === "number");
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  /*** META ((export #t)
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  */
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      return sc_isNumber(n);
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  /*** META ((export #t)
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  */
  function sc_isReal(n) {
      return sc_isNumber(n);
  }
  
  /*** META ((export #t)
             (type bool))
  */
  function sc_isRational(n) {
      return sc_isReal(n);
  }
  
  /*** META ((export #t)
             (type bool))
  */
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      return (parseInt(n) === n);
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix ", false")))
  */
  // we don't have exact numbers...
  function sc_isExact(n) {
      return false;
  }
  
  /*** META ((export #t)
             (peephole (postfix ", true"))
  	   (type bool))
  */
  function sc_isInexact(n) {
      return true;
  }
  
  /*** META ((export = =fx =fl)
             (type bool)
             (peephole (infix 2 2 "===")))
  */
  function sc_equal(x) {
      for (var i = 1; i < arguments.length; i++)
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  	    return false;
      return true;
  }
  
  /*** META ((export < <fx <fl)
             (type bool)
             (peephole (infix 2 2 "<")))
  */
  function sc_less(x) {
      for (var i = 1; i < arguments.length; i++) {
  	if (x >= arguments[i])
  	    return false;
  	x = arguments[i];
      }
      return true;
  }
  
  /*** META ((export > >fx >fl)
             (type bool)
             (peephole (infix 2 2 ">")))
  */
  function sc_greater(x, y) {
      for (var i = 1; i < arguments.length; i++) {
  	if (x <= arguments[i])
  	    return false;
  	x = arguments[i];
      }
      return true;
  }
  
  /*** META ((export <= <=fx <=fl)
             (type bool)
             (peephole (infix 2 2 "<=")))
  */
  function sc_lessEqual(x, y) {
      for (var i = 1; i < arguments.length; i++) {
  	if (x > arguments[i])
  	    return false;
  	x = arguments[i];
      }
      return true;
  }
  
  /*** META ((export >= >=fl >=fx)
             (type bool)
             (peephole (infix 2 2 ">=")))
  */
  function sc_greaterEqual(x, y) {
      for (var i = 1; i < arguments.length; i++) {
  	if (x < arguments[i])
  	    return false;
  	x = arguments[i];
      }
      return true;
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix "=== 0")))
  */
  function sc_isZero(x) {
      return (x === 0);
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix "> 0")))
  */
  function sc_isPositive(x) {
      return (x > 0);
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix "< 0")))
  */
  function sc_isNegative(x) {
      return (x < 0);
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix "%2===1")))
  */
  function sc_isOdd(x) {
      return (x % 2 === 1);
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix "%2===0")))
  */
  function sc_isEven(x) {
      return (x % 2 === 0);
  }
  
  /*** META ((export #t)) */
  var sc_max = Math.max;
  /*** META ((export #t)) */
  var sc_min = Math.min;
  
  /*** META ((export + +fx +fl)
             (peephole (infix 0 #f "+" "0")))
  */
  function sc_plus() {
      var sum = 0;
      for (var i = 0; i < arguments.length; i++)
  	sum += arguments[i];
      return sum;
  }
  
  /*** META ((export * *fx *fl)
             (peephole (infix 0 #f "*" "1")))
  */
  function sc_multi() {
      var product = 1;
      for (var i = 0; i < arguments.length; i++)
  	product *= arguments[i];
      return product;
  }
  
  /*** META ((export - -fx -fl)
             (peephole (minus)))
  */
  function sc_minus(x) {
      if (arguments.length === 1)
  	return -x;
      else {
  	var res = x;
  	for (var i = 1; i < arguments.length; i++)
  	    res -= arguments[i];
  	return res;
      }
  }
  
  /*** META ((export / /fl)
             (peephole (div)))
  */
  function sc_div(x) {
      if (arguments.length === 1)
  	return 1/x;
      else {
  	var res = x;
  	for (var i = 1; i < arguments.length; i++)
  	    res /= arguments[i];
  	return res;
      }
  }
  
  /*** META ((export #t)) */
  var sc_abs = Math.abs;
  
  /*** META ((export quotient /fx)
             (peephole (hole 2 "parseInt(" x "/" y ")")))
  */
  function sc_quotient(x, y) {
      return parseInt(x / y);
  }
  
  /*** META ((export #t)
             (peephole (infix 2 2 "%")))
  */
  function sc_remainder(x, y) {
      return x % y;
  }
  
  /*** META ((export #t)
             (peephole (modulo)))
  */
  function sc_modulo(x, y) {
      var remainder = x % y;
      // if they don't have the same sign
      if ((remainder * y) < 0)
  	return remainder + y;
      else
  	return remainder;
  }
  
  function sc_euclid_gcd(a, b) {
      var temp;
      if (a === 0) return b;
      if (b === 0) return a;
      if (a < 0) {a = -a;};
      if (b < 0) {b = -b;};
      if (b > a) {temp = a; a = b; b = temp;};
      while (true) {
  	a %= b;
  	if(a === 0) {return b;};
  	b %= a;
  	if(b === 0) {return a;};
      };
      return b;
  }
  
  /*** META ((export #t)) */
  function sc_gcd() {
      var gcd = 0;
      for (var i = 0; i < arguments.length; i++)
  	gcd = sc_euclid_gcd(gcd, arguments[i]);
      return gcd;
  }
  
  /*** META ((export #t)) */
  function sc_lcm() {
      var lcm = 1;
      for (var i = 0; i < arguments.length; i++) {
  	var f = Math.round(arguments[i] / sc_euclid_gcd(arguments[i], lcm));
  	lcm *= Math.abs(f);
      }
      return lcm;
  }
  
  // LIMITATION: numerator and denominator don't make sense in floating point world.
  //var SC_MAX_DECIMALS = 1000000
  //
  // function sc_numerator(x) {
  //     var rounded = Math.round(x * SC_MAX_DECIMALS);
  //     return Math.round(rounded / sc_euclid_gcd(rounded, SC_MAX_DECIMALS));
  // }
  
  // function sc_denominator(x) {
  //     var rounded = Math.round(x * SC_MAX_DECIMALS);
  //     return Math.round(SC_MAX_DECIMALS / sc_euclid_gcd(rounded, SC_MAX_DECIMALS));
  // }
  
  /*** META ((export #t)) */
  var sc_floor = Math.floor;
  /*** META ((export #t)) */
  var sc_ceiling = Math.ceil;
  /*** META ((export #t)) */
  var sc_truncate = parseInt;
  /*** META ((export #t)) */
  var sc_round = Math.round;
  
  // LIMITATION: sc_rationalize doesn't make sense in a floating point world.
  
  /*** META ((export #t)) */
  var sc_exp = Math.exp;
  /*** META ((export #t)) */
  var sc_log = Math.log;
  /*** META ((export #t)) */
  var sc_sin = Math.sin;
  /*** META ((export #t)) */
  var sc_cos = Math.cos;
  /*** META ((export #t)) */
  var sc_tan = Math.tan;
  /*** META ((export #t)) */
  var sc_asin = Math.asin;
  /*** META ((export #t)) */
  var sc_acos = Math.acos;
  /*** META ((export #t)) */
  var sc_atan = Math.atan;
  
  /*** META ((export #t)) */
  var sc_sqrt = Math.sqrt;
  /*** META ((export #t)) */
  var sc_expt = Math.pow;
  
  // LIMITATION: we don't have complex numbers.
  // LIMITATION: the following functions are hence not implemented.
  // LIMITATION: make-rectangular, make-polar, real-part, imag-part, magnitude, angle
  // LIMITATION: 2 argument atan
  
  /*** META ((export #t)
             (peephole (id)))
  */
  function sc_exact2inexact(x) {
      return x;
  }
  
  /*** META ((export #t)
             (peephole (id)))
  */
  function sc_inexact2exact(x) {
      return x;
  }
  
  function sc_number2jsstring(x, radix) {
      if (radix)
  	return x.toString(radix);
      else
  	return x.toString();
  }
  
  function sc_jsstring2number(s, radix) {
      if (s === "") return false;
  
      if (radix) {
  	var t = parseInt(s, radix);
  	if (!t && t !== 0) return false;
  	// verify that each char is in range. (parseInt ignores leading
  	// white and trailing chars)
  	var allowedChars = "01234567890abcdefghijklmnopqrstuvwxyz".substring(0, radix+1);
  	if ((new RegExp("^["+allowedChars+"]*$", "i")).test(s))
  	    return t;
  	else return false;
      } else {
  	var t = +s; // does not ignore trailing chars.
  	if (!t && t !== 0) return false;
  	// simply verify that first char is not whitespace.
  	var c = s.charAt(0);
  	// if +c is 0, but the char is not "0", then we have a whitespace.
  	if (+c === 0 && c !== "0") return false;
  	return t;
      }
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (not)))
  */
  function sc_not(b) {
      return b === false;
  }
  
  /*** META ((export #t)
             (type bool))
  */
  function sc_isBoolean(b) {
      return (b === true) || (b === false);
  }
  
  function sc_Pair(car, cdr) {
      this.car = car;
      this.cdr = cdr;
  }
  
  sc_Pair.prototype.toString = function() {
      return sc_toDisplayString(this);
  };
  sc_Pair.prototype.sc_toWriteOrDisplayString = function(writeOrDisplay) {
      var current = this;
  
      var res = "(";
  
      while(true) {
  	res += writeOrDisplay(current.car);
  	if (sc_isPair(current.cdr)) {
  	    res += " ";
  	    current = current.cdr;
  	} else if (current.cdr !== null) {
  	    res += " . " + writeOrDisplay(current.cdr);
  	    break;
  	} else // current.cdr == null
  	    break;
      }
  	
      res += ")";
  
      return res;
  };
  sc_Pair.prototype.sc_toDisplayString = function() {
      return this.sc_toWriteOrDisplayString(sc_toDisplayString);
  };
  sc_Pair.prototype.sc_toWriteString = function() {
      return this.sc_toWriteOrDisplayString(sc_toWriteString);
  };
  // sc_Pair.prototype.sc_toWriteCircleString in IO.js
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix " instanceof sc_Pair")))
  */
  function sc_isPair(p) {
      return (p instanceof sc_Pair);
  }
  
  function sc_isPairEqual(p1, p2, comp) {
      return (comp(p1.car, p2.car) && comp(p1.cdr, p2.cdr));
  }
  
  /*** META ((export #t)
             (peephole (hole 2 "new sc_Pair(" car ", " cdr ")")))
  */
  function sc_cons(car, cdr) {
      return new sc_Pair(car, cdr);
  }
  
  /*** META ((export cons*)) */
  function sc_consStar() {
      var res = arguments[arguments.length - 1];
      for (var i = arguments.length-2; i >= 0; i--)
  	res = new sc_Pair(arguments[i], res);
      return res;
  }
  
  /*** META ((export #t)
             (peephole (postfix ".car")))
  */
  function sc_car(p) {
      return p.car;
  }
  
  /*** META ((export #t)
             (peephole (postfix ".cdr")))
  */
  function sc_cdr(p) {
      return p.cdr;
  }
  
  /*** META ((export #t)
             (peephole (hole 2 p ".car = " val)))
  */
  function sc_setCarBang(p, val) {
      p.car = val;
  }
  
  /*** META ((export #t)
             (peephole (hole 2 p ".cdr = " val)))
  */
  function sc_setCdrBang(p, val) {
      p.cdr = val;
  }
  
  /*** META ((export #t)
             (peephole (postfix ".car.car")))
  */
  function sc_caar(p) { return p.car.car; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.car")))
  */
  function sc_cadr(p) { return p.cdr.car; }
  /*** META ((export #t)
             (peephole (postfix ".car.cdr")))
  */
  function sc_cdar(p) { return p.car.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.cdr")))
  */
  function sc_cddr(p) { return p.cdr.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".car.car.car")))
  */
  function sc_caaar(p) { return p.car.car.car; }
  /*** META ((export #t)
             (peephole (postfix ".car.cdr.car")))
  */
  function sc_cadar(p) { return p.car.cdr.car; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.car.car")))
  */
  function sc_caadr(p) { return p.cdr.car.car; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.cdr.car")))
  */
  function sc_caddr(p) { return p.cdr.cdr.car; }
  /*** META ((export #t)
             (peephole (postfix ".car.car.cdr")))
  */
  function sc_cdaar(p) { return p.car.car.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.car.cdr")))
  */
  function sc_cdadr(p) { return p.cdr.car.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".car.cdr.cdr")))
  */
  function sc_cddar(p) { return p.car.cdr.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.cdr.cdr")))
  */
  function sc_cdddr(p) { return p.cdr.cdr.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".car.car.car.car")))
  */
  function sc_caaaar(p) { return p.car.car.car.car; }
  /*** META ((export #t)
             (peephole (postfix ".car.cdr.car.car")))
  */
  function sc_caadar(p) { return p.car.cdr.car.car; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.car.car.car")))
  */
  function sc_caaadr(p) { return p.cdr.car.car.car; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.cdr.car.car")))
  */
  function sc_caaddr(p) { return p.cdr.cdr.car.car; }
  /*** META ((export #t)
             (peephole (postfix ".car.car.car.cdr")))
  */
  function sc_cdaaar(p) { return p.car.car.car.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".car.cdr.car.cdr")))
  */
  function sc_cdadar(p) { return p.car.cdr.car.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.car.car.cdr")))
  */
  function sc_cdaadr(p) { return p.cdr.car.car.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.cdr.car.cdr")))
  */
  function sc_cdaddr(p) { return p.cdr.cdr.car.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".car.car.cdr.car")))
  */
  function sc_cadaar(p) { return p.car.car.cdr.car; }
  /*** META ((export #t)
             (peephole (postfix ".car.cdr.cdr.car")))
  */
  function sc_caddar(p) { return p.car.cdr.cdr.car; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.car.cdr.car")))
  */
  function sc_cadadr(p) { return p.cdr.car.cdr.car; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.cdr.cdr.car")))
  */
  function sc_cadddr(p) { return p.cdr.cdr.cdr.car; }
  /*** META ((export #t)
             (peephole (postfix ".car.car.cdr.cdr")))
  */
  function sc_cddaar(p) { return p.car.car.cdr.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".car.cdr.cdr.cdr")))
  */
  function sc_cdddar(p) { return p.car.cdr.cdr.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.car.cdr.cdr")))
  */
  function sc_cddadr(p) { return p.cdr.car.cdr.cdr; }
  /*** META ((export #t)
             (peephole (postfix ".cdr.cdr.cdr.cdr")))
  */
  function sc_cddddr(p) { return p.cdr.cdr.cdr.cdr; }
  
  /*** META ((export #t)) */
  function sc_lastPair(l) {
      if (!sc_isPair(l)) sc_error("sc_lastPair: pair expected");
      var res = l;
      var cdr = l.cdr;
      while (sc_isPair(cdr)) {
  	res = cdr;
  	cdr = res.cdr;
      }
      return res;
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix " === null")))
  */
  function sc_isNull(o) {
      return (o === null);
  }
  
  /*** META ((export #t)
             (type bool))
  */
  function sc_isList(o) {
      var rabbit;
      var turtle;
  
      var rabbit = o;
      var turtle = o;
      while (true) {
  	if (rabbit === null ||
  	    (rabbit instanceof sc_Pair && rabbit.cdr === null))
  	    return true;  // end of list
  	else if ((rabbit instanceof sc_Pair) &&
  		 (rabbit.cdr instanceof sc_Pair)) {
  	    rabbit = rabbit.cdr.cdr;
  	    turtle = turtle.cdr;
  	    if (rabbit === turtle) return false; // cycle
  	} else
  	    return false; // not pair
      }
  }
  
  /*** META ((export #t)) */
  function sc_list() {
      var res = null;
      var a = arguments;
      for (var i = a.length-1; i >= 0; i--)
  	res = new sc_Pair(a[i], res);
      return res;
  }
  
  /*** META ((export #t)) */
  function sc_iota(num, init) {
     var res = null;
     if (!init) init = 0;
     for (var i = num - 1; i >= 0; i--)
        res = new sc_Pair(i + init, res);
     return res;
  }
  
  /*** META ((export #t)) */
  function sc_makeList(nbEls, fill) {
      var res = null;
      for (var i = 0; i < nbEls; i++)
  	res = new sc_Pair(fill, res);
      return res;
  }
  
  /*** META ((export #t)) */
  function sc_length(l) {
      var res = 0;
      while (l !== null) {
  	res++;
  	l = l.cdr;
      }
      return res;
  }
  
  /*** META ((export #t)) */
  function sc_remq(o, l) {
      var dummy = { cdr : null };
      var tail = dummy;
      while (l !== null) {
  	if (l.car !== o) {
  	    tail.cdr = sc_cons(l.car, null);
  	    tail = tail.cdr;
  	}
  	l = l.cdr;
      }
      return dummy.cdr;
  }
  
  /*** META ((export #t)) */
  function sc_remqBang(o, l) {
      var dummy = { cdr : null };
      var tail = dummy;
      var needsAssig = true;
      while (l !== null) {
  	if (l.car === o) {
  	    needsAssig = true;
  	} else {
  	    if (needsAssig) {
  		tail.cdr = l;
  		needsAssig = false;
  	    }
  	    tail = l;
  	}
  	l = l.cdr;
      }
      tail.cdr = null;
      return dummy.cdr;
  }
  
  /*** META ((export #t)) */
  function sc_delete(o, l) {
      var dummy = { cdr : null };
      var tail = dummy;
      while (l !== null) {
  	if (!sc_isEqual(l.car, o)) {
  	    tail.cdr = sc_cons(l.car, null);
  	    tail = tail.cdr;
  	}
  	l = l.cdr;
      }
      return dummy.cdr;
  }
  
  /*** META ((export #t)) */
  function sc_deleteBang(o, l) {
      var dummy = { cdr : null };
      var tail = dummy;
      var needsAssig = true;
      while (l !== null) {
  	if (sc_isEqual(l.car, o)) {
  	    needsAssig = true;
  	} else {
  	    if (needsAssig) {
  		tail.cdr = l;
  		needsAssig = false;
  	    }
  	    tail = l;
  	}
  	l = l.cdr;
      }
      tail.cdr = null;
      return dummy.cdr;
  }
  
  function sc_reverseAppendBang(l1, l2) {
      var res = l2;
      while (l1 !== null) {
  	var tmp = res;
  	res = l1;
  	l1 = l1.cdr;
  	res.cdr = tmp;
      }
      return res;
  }
  	
  function sc_dualAppend(l1, l2) {
      if (l1 === null) return l2;
      if (l2 === null) return l1;
      var rev = sc_reverse(l1);
      return sc_reverseAppendBang(rev, l2);
  }
  
  /*** META ((export #t)) */
  function sc_append() {
      if (arguments.length === 0)
  	return null;
      var res = arguments[arguments.length - 1];
      for (var i = arguments.length - 2; i >= 0; i--)
  	res = sc_dualAppend(arguments[i], res);
      return res;
  }
  
  function sc_dualAppendBang(l1, l2) {
      if (l1 === null) return l2;
      if (l2 === null) return l1;
      var tmp = l1;
      while (tmp.cdr !== null) tmp=tmp.cdr;
      tmp.cdr = l2;
      return l1;
  }
  
  /*** META ((export #t)) */
  function sc_appendBang() {
      var res = null;
      for (var i = 0; i < arguments.length; i++)
  	res = sc_dualAppendBang(res, arguments[i]);
      return res;
  }
  
  /*** META ((export #t)) */
  function sc_reverse(l1) {
      var res = null;
      while (l1 !== null) {
  	res = sc_cons(l1.car, res);
  	l1 = l1.cdr;
      }
      return res;
  }
  
  /*** META ((export #t)) */
  function sc_reverseBang(l) {
      return sc_reverseAppendBang(l, null);
  }
  
  /*** META ((export #t)) */
  function sc_listTail(l, k) {
      var res = l;
      for (var i = 0; i < k; i++) {
  	res = res.cdr;
      }
      return res;
  }
  
  /*** META ((export #t)) */
  function sc_listRef(l, k) {
      return sc_listTail(l, k).car;
  }
  
  /* // unoptimized generic versions
  function sc_memX(o, l, comp) {
      while (l != null) {
  	if (comp(l.car, o))
  	    return l;
  	l = l.cdr;
      }
      return false;
  }
  function sc_memq(o, l) { return sc_memX(o, l, sc_isEq); }
  function sc_memv(o, l) { return sc_memX(o, l, sc_isEqv); }
  function sc_member(o, l) { return sc_memX(o, l, sc_isEqual); }
  */
  
  /* optimized versions */
  /*** META ((export #t)) */
  function sc_memq(o, l) {
      while (l !== null) {
  	if (l.car === o)
  	    return l;
  	l = l.cdr;
      }
      return false;
  }
  /*** META ((export #t)) */
  function sc_memv(o, l) {
      while (l !== null) {
  	if (l.car === o)
  	    return l;
  	l = l.cdr;
      }
      return false;
  }
  /*** META ((export #t)) */
  function sc_member(o, l) {
      while (l !== null) {
  	if (sc_isEqual(l.car,o))
  	    return l;
  	l = l.cdr;
      }
      return false;
  }
  
  /* // generic unoptimized versions
  function sc_assX(o, al, comp) {
      while (al != null) {
  	if (comp(al.car.car, o))
  	    return al.car;
  	al = al.cdr;
      }
      return false;
  }
  function sc_assq(o, al) { return sc_assX(o, al, sc_isEq); }
  function sc_assv(o, al) { return sc_assX(o, al, sc_isEqv); }
  function sc_assoc(o, al) { return sc_assX(o, al, sc_isEqual); }
  */
  // optimized versions
  /*** META ((export #t)) */
  function sc_assq(o, al) {
      while (al !== null) {
  	if (al.car.car === o)
  	    return al.car;
  	al = al.cdr;
      }
      return false;
  }
  /*** META ((export #t)) */
  function sc_assv(o, al) {
      while (al !== null) {
  	if (al.car.car === o)
  	    return al.car;
  	al = al.cdr;
      }
      return false;
  }
  /*** META ((export #t)) */
  function sc_assoc(o, al) {
      while (al !== null) {
  	if (sc_isEqual(al.car.car, o))
  	    return al.car;
  	al = al.cdr;
      }
      return false;
  }
  
  /* can be used for mutable strings and characters */
  function sc_isCharStringEqual(cs1, cs2) { return cs1.val === cs2.val; }
  function sc_isCharStringLess(cs1, cs2) { return cs1.val < cs2.val; }
  function sc_isCharStringGreater(cs1, cs2) { return cs1.val > cs2.val; }
  function sc_isCharStringLessEqual(cs1, cs2) { return cs1.val <= cs2.val; }
  function sc_isCharStringGreaterEqual(cs1, cs2) { return cs1.val >= cs2.val; }
  function sc_isCharStringCIEqual(cs1, cs2)
      { return cs1.val.toLowerCase() === cs2.val.toLowerCase(); }
  function sc_isCharStringCILess(cs1, cs2)
      { return cs1.val.toLowerCase() < cs2.val.toLowerCase(); }
  function sc_isCharStringCIGreater(cs1, cs2)
      { return cs1.val.toLowerCase() > cs2.val.toLowerCase(); }
  function sc_isCharStringCILessEqual(cs1, cs2)
      { return cs1.val.toLowerCase() <= cs2.val.toLowerCase(); }
  function sc_isCharStringCIGreaterEqual(cs1, cs2)
      { return cs1.val.toLowerCase() >= cs2.val.toLowerCase(); }
  
  
  
  
  function sc_Char(c) {
      var cached = sc_Char.lazy[c];
      if (cached)
  	return cached;
      this.val = c;
      sc_Char.lazy[c] = this;
      // add return, so FF does not complain.
      return undefined;
  }
  sc_Char.lazy = new Object();
  // thanks to Eric
  sc_Char.char2readable = {
      "\000": "#\\null",
      "\007": "#\\bell",
      "\010": "#\\backspace",
      "\011": "#\\tab",
      "\012": "#\\newline",
      "\014": "#\\page",
      "\015": "#\\return",
      "\033": "#\\escape",
      "\040": "#\\space",
      "\177": "#\\delete",
  
    /* poeticless names */
      "\001": "#\\soh",
      "\002": "#\\stx",
      "\003": "#\\etx",
      "\004": "#\\eot",
      "\005": "#\\enq",
      "\006": "#\\ack",
  
      "\013": "#\\vt",
      "\016": "#\\so",
      "\017": "#\\si",
  
      "\020": "#\\dle",
      "\021": "#\\dc1",
      "\022": "#\\dc2",
      "\023": "#\\dc3",
      "\024": "#\\dc4",
      "\025": "#\\nak",
      "\026": "#\\syn",
      "\027": "#\\etb",
  
      "\030": "#\\can",
      "\031": "#\\em",
      "\032": "#\\sub",
      "\033": "#\\esc",
      "\034": "#\\fs",
      "\035": "#\\gs",
      "\036": "#\\rs",
      "\037": "#\\us"};
  
  sc_Char.readable2char = {
      "null": "\000",
      "bell": "\007",
      "backspace": "\010",
      "tab": "\011",
      "newline": "\012",
      "page": "\014",
      "return": "\015",
      "escape": "\033",
      "space": "\040",
      "delete": "\000",
      "soh": "\001",
      "stx": "\002",
      "etx": "\003",
      "eot": "\004",
      "enq": "\005",
      "ack": "\006",
      "bel": "\007",
      "bs": "\010",
      "ht": "\011",
      "nl": "\012",
      "vt": "\013",
      "np": "\014",
      "cr": "\015",
      "so": "\016",
      "si": "\017",
      "dle": "\020",
      "dc1": "\021",
      "dc2": "\022",
      "dc3": "\023",
      "dc4": "\024",
      "nak": "\025",
      "syn": "\026",
      "etb": "\027",
      "can": "\030",
      "em": "\031",
      "sub": "\032",
      "esc": "\033",
      "fs": "\034",
      "gs": "\035",
      "rs": "\036",
      "us": "\037",
      "sp": "\040",
      "del": "\177"};
  
  sc_Char.prototype.toString = function() {
      return this.val;
  };
  // sc_toDisplayString == toString
  sc_Char.prototype.sc_toWriteString = function() {
      var entry = sc_Char.char2readable[this.val];
      if (entry)
  	return entry;
      else
  	return "#\\" + this.val;
  };
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix "instanceof sc_Char")))
  */
  function sc_isChar(c) {
      return (c instanceof sc_Char);
  }
  
  /*** META ((export char=?)
             (type bool)
             (peephole (hole 2 c1 ".val === " c2 ".val")))
  */
  var sc_isCharEqual = sc_isCharStringEqual;
  /*** META ((export char<?)
             (type bool)
             (peephole (hole 2 c1 ".val < " c2 ".val")))
  */
  var sc_isCharLess = sc_isCharStringLess;
  /*** META ((export char>?)
             (type bool)
             (peephole (hole 2 c1 ".val > " c2 ".val")))
  */
  var sc_isCharGreater = sc_isCharStringGreater;
  /*** META ((export char<=?)
             (type bool)
             (peephole (hole 2 c1 ".val <= " c2 ".val")))
  */
  var sc_isCharLessEqual = sc_isCharStringLessEqual;
  /*** META ((export char>=?)
             (type bool)
             (peephole (hole 2 c1 ".val >= " c2 ".val")))
  */
  var sc_isCharGreaterEqual = sc_isCharStringGreaterEqual;
  /*** META ((export char-ci=?)
             (type bool)
             (peephole (hole 2 c1 ".val.toLowerCase() === " c2 ".val.toLowerCase()")))
  */
  var sc_isCharCIEqual = sc_isCharStringCIEqual;
  /*** META ((export char-ci<?)
             (type bool)
             (peephole (hole 2 c1 ".val.toLowerCase() < " c2 ".val.toLowerCase()")))
  */
  var sc_isCharCILess = sc_isCharStringCILess;
  /*** META ((export char-ci>?)
             (type bool)
             (peephole (hole 2 c1 ".val.toLowerCase() > " c2 ".val.toLowerCase()")))
  */
  var sc_isCharCIGreater = sc_isCharStringCIGreater;
  /*** META ((export char-ci<=?)
             (type bool)
             (peephole (hole 2 c1 ".val.toLowerCase() <= " c2 ".val.toLowerCase()")))
  */
  var sc_isCharCILessEqual = sc_isCharStringCILessEqual;
  /*** META ((export char-ci>=?)
             (type bool)
             (peephole (hole 2 c1 ".val.toLowerCase() >= " c2 ".val.toLowerCase()")))
  */
  var sc_isCharCIGreaterEqual = sc_isCharStringCIGreaterEqual;
  
  var SC_NUMBER_CLASS = "0123456789";
  var SC_WHITESPACE_CLASS = ' \r\n\t\f';
  var SC_LOWER_CLASS = 'abcdefghijklmnopqrstuvwxyz';
  var SC_UPPER_CLASS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
  
  function sc_isCharOfClass(c, cl) { return (cl.indexOf(c) != -1); }
  /*** META ((export #t)
             (type bool))
  */
  function sc_isCharAlphabetic(c)
      { return sc_isCharOfClass(c.val, SC_LOWER_CLASS) ||
  	  sc_isCharOfClass(c.val, SC_UPPER_CLASS); }
  /*** META ((export #t)
             (type bool)
             (peephole (hole 1 "SC_NUMBER_CLASS.indexOf(" c ".val) != -1")))
  */
  function sc_isCharNumeric(c)
      { return sc_isCharOfClass(c.val, SC_NUMBER_CLASS); }
  /*** META ((export #t)
             (type bool))
  */
  function sc_isCharWhitespace(c) {
      var tmp = c.val;
      return tmp === " " || tmp === "\r" || tmp === "\n" || tmp === "\t" || tmp === "\f";
  }
  /*** META ((export #t)
             (type bool)
             (peephole (hole 1 "SC_UPPER_CLASS.indexOf(" c ".val) != -1")))
  */
  function sc_isCharUpperCase(c)
      { return sc_isCharOfClass(c.val, SC_UPPER_CLASS); }
  /*** META ((export #t)
             (type bool)
             (peephole (hole 1 "SC_LOWER_CLASS.indexOf(" c ".val) != -1")))
  */
  function sc_isCharLowerCase(c)
      { return sc_isCharOfClass(c.val, SC_LOWER_CLASS); }
  
  /*** META ((export #t)
             (peephole (postfix ".val.charCodeAt(0)")))
  */
  function sc_char2integer(c)
      { return c.val.charCodeAt(0); }
  /*** META ((export #t)
             (peephole (hole 1 "new sc_Char(String.fromCharCode(" n "))")))
  */
  function sc_integer2char(n)
      { return new sc_Char(String.fromCharCode(n)); }
  
  /*** META ((export #t)
             (peephole (hole 1 "new sc_Char(" c ".val.toUpperCase())")))
  */
  function sc_charUpcase(c)
      { return new sc_Char(c.val.toUpperCase()); }
  /*** META ((export #t)
             (peephole (hole 1 "new sc_Char(" c ".val.toLowerCase())")))
  */
  function sc_charDowncase(c)
      { return new sc_Char(c.val.toLowerCase()); }
  
  function sc_makeJSStringOfLength(k, c) {
      var fill;
      if (c === undefined)
  	fill = " ";
      else
  	fill = c;
      var res = "";
      var len = 1;
      // every round doubles the size of fill.
      while (k >= len) {
  	if (k & len)
  	    res = res.concat(fill);
  	fill = fill.concat(fill);
  	len *= 2;
      }
      return res;
  }
  
  function sc_makejsString(k, c) {
      var fill;
      if (c)
  	fill = c.val;
      else
  	fill = " ";
      return sc_makeJSStringOfLength(k, fill);
  }
  
  function sc_jsstring2list(s) {
      var res = null;
      for (var i = s.length - 1; i >= 0; i--)
  	res = sc_cons(new sc_Char(s.charAt(i)), res);
      return res;
  }
  
  function sc_list2jsstring(l) {
      var a = new Array();
      while(l !== null) {
  	a.push(l.car.val);
  	l = l.cdr;
      }
      return "".concat.apply("", a);
  }
  
  var sc_Vector = Array;
  
  sc_Vector.prototype.sc_toWriteOrDisplayString = function(writeOrDisplay) {
      if (this.length === 0) return "#()";
  
      var res = "#(" + writeOrDisplay(this[0]);
      for (var i = 1; i < this.length; i++)
  	res += " " + writeOrDisplay(this[i]);
      res += ")";
      return res;
  };
  sc_Vector.prototype.sc_toDisplayString = function() {
      return this.sc_toWriteOrDisplayString(sc_toDisplayString);
  };
  sc_Vector.prototype.sc_toWriteString = function() {
      return this.sc_toWriteOrDisplayString(sc_toWriteString);
  };
  
  /*** META ((export vector? array?)
             (type bool)
             (peephole (postfix " instanceof sc_Vector")))
  */
  function sc_isVector(v) {
      return (v instanceof sc_Vector);
  }
  
  // only applies to vectors
  function sc_isVectorEqual(v1, v2, comp) {
      if (v1.length !== v2.length) return false;
      for (var i = 0; i < v1.length; i++)
  	if (!comp(v1[i], v2[i])) return false;
      return true;
  }
  
  /*** META ((export make-vector make-array)) */
  function sc_makeVector(size, fill) {
      var a = new sc_Vector(size);
      if (fill !== undefined)
  	sc_vectorFillBang(a, fill);
      return a;
  }
  
  /*** META ((export vector array)
             (peephole (vector)))
  */
  function sc_vector() {
      var a = new sc_Vector();
      for (var i = 0; i < arguments.length; i++)
  	a.push(arguments[i]);
      return a;
  }
  
  /*** META ((export vector-length array-length)
             (peephole (postfix ".length")))
  */
  function sc_vectorLength(v) {
      return v.length;
  }
  
  /*** META ((export vector-ref array-ref)
             (peephole (hole 2 v "[" pos "]")))
  */
  function sc_vectorRef(v, pos) {
      return v[pos];
  }
  
  /*** META ((export vector-set! array-set!)
             (peephole (hole 3 v "[" pos "] = " val)))
  */
  function sc_vectorSetBang(v, pos, val) {
      v[pos] = val;
  }
  
  /*** META ((export vector->list array->list)) */
  function sc_vector2list(a) {
      var res = null;
      for (var i = a.length-1; i >= 0; i--)
  	res = sc_cons(a[i], res);
      return res;
  }
  
  /*** META ((export list->vector list->array)) */
  function sc_list2vector(l) {
      var a = new sc_Vector();
      while(l !== null) {
  	a.push(l.car);
  	l = l.cdr;
      }
      return a;
  }
  
  /*** META ((export vector-fill! array-fill!)) */
  function sc_vectorFillBang(a, fill) {
      for (var i = 0; i < a.length; i++)
  	a[i] = fill;
  }
  
  
  /*** META ((export #t)) */
  function sc_copyVector(a, len) {
      if (len <= a.length)
  	return a.slice(0, len);
      else {
  	var tmp = a.concat();
  	tmp.length = len;
  	return tmp;
      }
  }
  
  /*** META ((export #t)
             (peephole (hole 3 a ".slice(" start "," end ")")))
  */
  function sc_vectorCopy(a, start, end) {
      return a.slice(start, end);
  }
  
  /*** META ((export #t)) */
  function sc_vectorCopyBang(target, tstart, source, sstart, send) {
      if (!sstart) sstart = 0;
      if (!send) send = source.length;
  
      // if target == source we don't want to overwrite not yet copied elements.
      if (tstart <= sstart) {
  	for (var i = tstart, j = sstart; j < send; i++, j++) {
  	    target[i] = source[j];
  	}
      } else {
  	var diff = send - sstart;
  	for (var i = tstart + diff - 1, j = send - 1;
  	     j >= sstart;
  	     i--, j--) {
  	    target[i] = source[j];
  	}
      }
      return target;
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (hole 1 "typeof " o " === 'function'")))
  */
  function sc_isProcedure(o) {
      return (typeof o === "function");
  }
  
  /*** META ((export #t)) */
  function sc_apply(proc) {
      var args = new Array();
      // first part of arguments are not in list-form.
      for (var i = 1; i < arguments.length - 1; i++)
  	args.push(arguments[i]);
      var l = arguments[arguments.length - 1];
      while (l !== null) {
  	args.push(l.car);
  	l = l.cdr;
      }
      return proc.apply(null, args);
  }
  
  /*** META ((export #t)) */
  function sc_map(proc, l1) {
      if (l1 === undefined)
  	return null;
      // else
      var nbApplyArgs = arguments.length - 1;
      var applyArgs = new Array(nbApplyArgs);
      var revres = null;
      while (l1 !== null) {
  	for (var i = 0; i < nbApplyArgs; i++) {
  	    applyArgs[i] = arguments[i + 1].car;
  	    arguments[i + 1] = arguments[i + 1].cdr;
  	}
  	revres = sc_cons(proc.apply(null, applyArgs), revres);
      }
      return sc_reverseAppendBang(revres, null);
  }
  
  /*** META ((export #t)) */
  function sc_mapBang(proc, l1) {
      if (l1 === undefined)
  	return null;
      // else
      var l1_orig = l1;
      var nbApplyArgs = arguments.length - 1;
      var applyArgs = new Array(nbApplyArgs);
      while (l1 !== null) {
  	var tmp = l1;
  	for (var i = 0; i < nbApplyArgs; i++) {
  	    applyArgs[i] = arguments[i + 1].car;
  	    arguments[i + 1] = arguments[i + 1].cdr;
  	}
  	tmp.car = proc.apply(null, applyArgs);
      }
      return l1_orig;
  }
  
  /*** META ((export #t)) */
  function sc_forEach(proc, l1) {
      if (l1 === undefined)
  	return undefined;
      // else
      var nbApplyArgs = arguments.length - 1;
      var applyArgs = new Array(nbApplyArgs);
      while (l1 !== null) {
  	for (var i = 0; i < nbApplyArgs; i++) {
  	    applyArgs[i] = arguments[i + 1].car;
  	    arguments[i + 1] = arguments[i + 1].cdr;
  	}
  	proc.apply(null, applyArgs);
      }
      // add return so FF does not complain.
      return undefined;
  }
  
  /*** META ((export #t)) */
  function sc_filter(proc, l1) {
      var dummy = { cdr : null };
      var tail = dummy;
      while (l1 !== null) {
  	if (proc(l1.car) !== false) {
  	    tail.cdr = sc_cons(l1.car, null);
  	    tail = tail.cdr;
  	}
  	l1 = l1.cdr;
      }
      return dummy.cdr;
  }
  
  /*** META ((export #t)) */
  function sc_filterBang(proc, l1) {
      var head = sc_cons("dummy", l1);
      var it = head;
      var next = l1;
      while (next !== null) {
          if (proc(next.car) !== false) {
  	    it.cdr = next
  	    it = next;
  	}
  	next = next.cdr;
      }
      it.cdr = null;
      return head.cdr;
  }
  
  function sc_filterMap1(proc, l1) {
      var revres = null;
      while (l1 !== null) {
          var tmp = proc(l1.car)
          if (tmp !== false) revres = sc_cons(tmp, revres);
          l1 = l1.cdr;
      }
      return sc_reverseAppendBang(revres, null);
  }
  function sc_filterMap2(proc, l1, l2) {
      var revres = null;
      while (l1 !== null) {
          var tmp = proc(l1.car, l2.car);
          if(tmp !== false) revres = sc_cons(tmp, revres);
  	l1 = l1.cdr;
  	l2 = l2.cdr
      }
      return sc_reverseAppendBang(revres, null);
  }
  
  /*** META ((export #t)) */
  function sc_filterMap(proc, l1, l2, l3) {
      if (l2 === undefined)
  	return sc_filterMap1(proc, l1);
      else if (l3 === undefined)
  	return sc_filterMap2(proc, l1, l2);
      // else
      var nbApplyArgs = arguments.length - 1;
      var applyArgs = new Array(nbApplyArgs);
      var revres = null;
      while (l1 !== null) {
  	for (var i = 0; i < nbApplyArgs; i++) {
  	    applyArgs[i] = arguments[i + 1].car;
  	    arguments[i + 1] = arguments[i + 1].cdr;
  	}
  	var tmp = proc.apply(null, applyArgs);
  	if(tmp !== false) revres = sc_cons(tmp, revres);
      }
      return sc_reverseAppendBang(revres, null);
  }
  
  /*** META ((export #t)) */
  function sc_any(proc, l) {
      var revres = null;
      while (l !== null) {
          var tmp = proc(l.car);
          if(tmp !== false) return tmp;
  	l = l.cdr;
      }
      return false;
  }
  
  /*** META ((export any?)
             (peephole (hole 2 "sc_any(" proc "," l ") !== false")))
  */
  function sc_anyPred(proc, l) {
      return sc_any(proc, l)!== false;
  }
  
  /*** META ((export #t)) */
  function sc_every(proc, l) {
      var revres = null;
      var tmp = true;
      while (l !== null) {
          tmp = proc(l.car);
          if (tmp === false) return false;
  	l = l.cdr;
      }
      return tmp;
  }
  
  /*** META ((export every?)
             (peephole (hole 2 "sc_every(" proc "," l ") !== false")))
  */
  function sc_everyPred(proc, l) {
      var tmp = sc_every(proc, l);
      if (tmp !== false) return true;
      return false;
  }
  
  /*** META ((export #t)
             (peephole (postfix "()")))
  */
  function sc_force(o) {
      return o();
  }
  
  /*** META ((export #t)) */
  function sc_makePromise(proc) {
      var isResultReady = false;
      var result = undefined;
      return function() {
  	if (!isResultReady) {
  	    var tmp = proc();
  	    if (!isResultReady) {
  		isResultReady = true;
  		result = tmp;
  	    }
  	}
  	return result;
      };
  }
  
  function sc_Values(values) {
      this.values = values;
  }
  
  /*** META ((export #t)
             (peephole (values)))
  */
  function sc_values() {
      if (arguments.length === 1)
  	return arguments[0];
      else
  	return new sc_Values(arguments);
  }
  
  /*** META ((export #t)) */
  function sc_callWithValues(producer, consumer) {
      var produced = producer();
      if (produced instanceof sc_Values)
  	return consumer.apply(null, produced.values);
      else
  	return consumer(produced);
  }
  
  /*** META ((export #t)) */
  function sc_dynamicWind(before, thunk, after) {
      before();
      try {
  	var res = thunk();
  	return res;
      } finally {
  	after();
      }
  }
  
  
  // TODO: eval/scheme-report-environment/null-environment/interaction-environment
  
  // LIMITATION: 'load' doesn't exist without files.
  // LIMITATION: transcript-on/transcript-off doesn't exist without files.
  
  
  function sc_Struct(name) {
      this.name = name;
  }
  sc_Struct.prototype.sc_toDisplayString = function() {
      return "#<struct" + sc_hash(this) + ">";
  };
  sc_Struct.prototype.sc_toWriteString = sc_Struct.prototype.sc_toDisplayString;
  
  /*** META ((export #t)
             (peephole (hole 1 "new sc_Struct(" name ")")))
  */
  function sc_makeStruct(name) {
      return new sc_Struct(name);
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix " instanceof sc_Struct")))
  */
  function sc_isStruct(o) {
      return (o instanceof sc_Struct);
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (hole 2 "(" 1 " instanceof sc_Struct) && ( " 1 ".name === " 0 ")")))
  */
  function sc_isStructNamed(name, s) {
      return ((s instanceof sc_Struct) && (s.name === name));
  }
  
  /*** META ((export struct-field)
             (peephole (hole 3 0 "[" 2 "]")))
  */
  function sc_getStructField(s, name, field) {
      return s[field];
  }
  
  /*** META ((export struct-field-set!)
             (peephole (hole 4 0 "[" 2 "] = " 3)))
  */
  function sc_setStructFieldBang(s, name, field, val) {
      s[field] = val;
  }
  
  /*** META ((export #t)
             (peephole (prefix "~")))
  */
  function sc_bitNot(x) {
      return ~x;
  }
  
  /*** META ((export #t)
             (peephole (infix 2 2 "&")))
  */
  function sc_bitAnd(x, y) {
      return x & y;
  }
  
  /*** META ((export #t)
             (peephole (infix 2 2 "|")))
  */
  function sc_bitOr(x, y) {
      return x | y;
  }
  
  /*** META ((export #t)
             (peephole (infix 2 2 "^")))
  */
  function sc_bitXor(x, y) {
      return x ^ y;
  }
  
  /*** META ((export #t)
             (peephole (infix 2 2 "<<")))
  */
  function sc_bitLsh(x, y) {
      return x << y;
  }
  
  /*** META ((export #t)
             (peephole (infix 2 2 ">>")))
  */
  function sc_bitRsh(x, y) {
      return x >> y;
  }
  
  /*** META ((export #t)
             (peephole (infix 2 2 ">>>")))
  */
  function sc_bitUrsh(x, y) {
      return x >>> y;
  }
  
  /*** META ((export js-field js-property)
             (peephole (hole 2 o "[" field "]")))
  */
  function sc_jsField(o, field) {
      return o[field];
  }
  
  /*** META ((export js-field-set! js-property-set!)
             (peephole (hole 3 o "[" field "] = " val)))
  */
  function sc_setJsFieldBang(o, field, val) {
      return o[field] = val;
  }
  
  /*** META ((export js-field-delete! js-property-delete!)
             (peephole (hole 2 "delete" o "[" field "]")))
  */
  function sc_deleteJsFieldBang(o, field) {
      delete o[field];
  }
  
  /*** META ((export #t)
             (peephole (jsCall)))
  */
  function sc_jsCall(o, fun) {
      var args = new Array();
      for (var i = 2; i < arguments.length; i++)
  	args[i-2] = arguments[i];
      return fun.apply(o, args);
  }
  
  /*** META ((export #t)
             (peephole (jsMethodCall)))
  */
  function sc_jsMethodCall(o, field) {
      var args = new Array();
      for (var i = 2; i < arguments.length; i++)
  	args[i-2] = arguments[i];
      return o[field].apply(o, args);
  }
  
  /*** META ((export new js-new)
             (peephole (jsNew)))
  */
  function sc_jsNew(c) {
      var evalStr = "new c(";
      evalStr +=arguments.length > 1? "arguments[1]": "";
      for (var i = 2; i < arguments.length; i++)
  	evalStr += ", arguments[" + i + "]";
      evalStr +=")";
      return eval(evalStr);
  }
  
  // ======================== RegExp ====================
  /*** META ((export #t)) */
  function sc_pregexp(re) {
      return new RegExp(sc_string2jsstring(re));
  }
  
  /*** META ((export #t)) */
  function sc_pregexpMatch(re, s) {
      var reg = (re instanceof RegExp) ? re : sc_pregexp(re);
      var tmp = reg.exec(sc_string2jsstring(s));
  
      if (tmp == null) return false;
  
      var res = null;
      for (var i = tmp.length-1; i >= 0; i--) {
  	if (tmp[i] !== null) {
  	    res = sc_cons(sc_jsstring2string(tmp[i]), res);
  	} else {
  	    res = sc_cons(false, res);
  	}
      }
      return res;
  }
  
  /*** META ((export #t)) */
  function sc_pregexpReplace(re, s1, s2) {
     var reg;
     var jss1 = sc_string2jsstring(s1);
     var jss2 = sc_string2jsstring(s2);
  
     if (re instanceof RegExp) {
         if (re.global)
  	   reg = re;
         else
  	   reg = new RegExp(re.source);
     } else {
         reg = new RegExp(sc_string2jsstring(re));
     }
  
     return jss1.replace(reg, jss2);
  }
  
  /*** META ((export pregexp-replace*)) */
  function sc_pregexpReplaceAll(re, s1, s2) {
     var reg;
     var jss1 = sc_string2jsstring(s1);
     var jss2 = sc_string2jsstring(s2);
  
     if (re instanceof RegExp) {
        if (re.global)
  	  reg = re;
        else
  	  reg = new RegExp(re.source, "g");
     } else {
         reg = new RegExp(sc_string2jsstring(re), "g");
     }
  
     return jss1.replace(reg, jss2);
  }
  
  /*** META ((export #t)) */
  function sc_pregexpSplit(re, s) {
     var reg = ((re instanceof RegExp) ?
  	      re :
  	      new RegExp(sc_string2jsstring(re)));
     var jss = sc_string2jsstring(s);
     var tmp = jss.split(reg);
  
     if (tmp == null) return false;
  
     return sc_vector2list(tmp);
  }
  
  
  /* =========================================================================== */
  /* Other library stuff */
  /* =========================================================================== */
  
  /*** META ((export #t)
             (peephole (hole 1 "Math.floor(Math.random()*" 'n ")")))
  */
  function sc_random(n) {
      return Math.floor(Math.random()*n);
  }
  
  /*** META ((export current-date)
             (peephole (hole 0 "new Date()")))
  */
  function sc_currentDate() {
     return new Date();
  }
  
  function sc_Hashtable() {
  }
  sc_Hashtable.prototype.toString = function() {
      return "#{%hashtable}";
  };
  // sc_toWriteString == sc_toDisplayString == toString
  
  function sc_HashtableElement(key, val) {
      this.key = key;
      this.val = val;
  }
  
  /*** META ((export #t)
             (peephole (hole 0 "new sc_Hashtable()")))
  */
  function sc_makeHashtable() {
      return new sc_Hashtable();
  }
  
  /*** META ((export #t)) */
  function sc_hashtablePutBang(ht, key, val) {
      var hash = sc_hash(key);
      ht[hash] = new sc_HashtableElement(key, val);
  }
  
  /*** META ((export #t)) */
  function sc_hashtableGet(ht, key) {
      var hash = sc_hash(key);
      if (hash in ht)
  	return ht[hash].val;
      else
  	return false;
  }
  
  /*** META ((export #t)) */
  function sc_hashtableForEach(ht, f) {
      for (var v in ht) {
  	if (ht[v] instanceof sc_HashtableElement)
  	    f(ht[v].key, ht[v].val);
      }
  }
  
  /*** META ((export hashtable-contains?)
             (peephole (hole 2 "sc_hash(" 1 ") in " 0)))
  */
  function sc_hashtableContains(ht, key) {
      var hash = sc_hash(key);
      if (hash in ht)
  	return true;
      else
  	return false;
  }
  
  var SC_HASH_COUNTER = 0;
  
  function sc_hash(o) {
      if (o === null)
  	return "null";
      else if (o === undefined)
  	return "undefined";
      else if (o === true)
  	return "true";
      else if (o === false)
  	return "false";
      else if (typeof o === "number")
  	return "num-" + o;
      else if (typeof o === "string")
  	return "jsstr-" + o;
      else if (o.sc_getHash)
  	return o.sc_getHash();
      else
  	return sc_counterHash.call(o);
  }
  function sc_counterHash() {
      if (!this.sc_hash) {
  	this.sc_hash = "hash-" + SC_HASH_COUNTER;
  	SC_HASH_COUNTER++;
      }
      return this.sc_hash;
  }
  
  function sc_Trampoline(args, maxTailCalls) {
      this['__trampoline return__'] = true;
      this.args = args;
      this.MAX_TAIL_CALLs = maxTailCalls;
  }
  // TODO: call/cc stuff
  sc_Trampoline.prototype.restart = function() {
      var o = this;
      while (true) {
  	// set both globals.
  	SC_TAIL_OBJECT.calls = o.MAX_TAIL_CALLs-1;
  	var fun = o.args.callee;
  	var res = fun.apply(SC_TAIL_OBJECT, o.args);
  	if (res instanceof sc_Trampoline)
  	    o = res;
  	else
  	    return res;
      }
  }
  
  /*** META ((export bind-exit-lambda)) */
  function sc_bindExitLambda(proc) {
      var escape_obj = new sc_BindExitException();
      var escape = function(res) {
  	escape_obj.res = res;
  	throw escape_obj;
      };
      try {
  	return proc(escape);
      } catch(e) {
  	if (e === escape_obj) {
  	    return e.res;
  	}
  	throw e;
      }
  }
  function sc_BindExitException() {
      this._internalException = true;
  }
  
  var SC_SCM2JS_GLOBALS = new Object();
  
  // default tail-call depth.
  // normally the program should set it again. but just in case...
  var SC_TAIL_OBJECT = new Object();
  SC_SCM2JS_GLOBALS.TAIL_OBJECT = SC_TAIL_OBJECT;
  // ======================== I/O =======================
  
  /*------------------------------------------------------------------*/
  
  function sc_EOF() {
  }
  var SC_EOF_OBJECT = new sc_EOF();
  
  function sc_Port() {
  }
  
  /* --------------- Input ports -------------------------------------*/
  
  function sc_InputPort() {
  }
  sc_InputPort.prototype = new sc_Port();
  
  sc_InputPort.prototype.peekChar = function() {
      if (!("peeked" in this))
  	this.peeked = this.getNextChar();
      return this.peeked;
  }
  sc_InputPort.prototype.readChar = function() {
      var tmp = this.peekChar();
      delete this.peeked;
      return tmp;
  }
  sc_InputPort.prototype.isCharReady = function() {
      return true;
  }
  sc_InputPort.prototype.close = function() {
      // do nothing
  }
  
  /* .............. String port ..........................*/
  function sc_ErrorInputPort() {
  };
  sc_ErrorInputPort.prototype = new sc_InputPort();
  sc_ErrorInputPort.prototype.getNextChar = function() {
      throw "can't read from error-port.";
  };
  sc_ErrorInputPort.prototype.isCharReady = function() {
      return false;
  };
  
  
  /* .............. String port ..........................*/
  
  function sc_StringInputPort(jsStr) {
      // we are going to do some charAts on the str.
      // instead of recreating all the time a String-object, we
      // create one in the beginning. (not sure, if this is really an optim)
      this.str = new String(jsStr);
      this.pos = 0;
  }
  sc_StringInputPort.prototype = new sc_InputPort();
  sc_StringInputPort.prototype.getNextChar = function() {
      if (this.pos >= this.str.length)
  	return SC_EOF_OBJECT;
      return this.str.charAt(this.pos++);
  };
  
  /* ------------- Read and other lib-funs  -------------------------------*/
  function sc_Token(type, val, pos) {
      this.type = type;
      this.val = val;
      this.pos = pos;
  }
  sc_Token.EOF = 0/*EOF*/;
  sc_Token.OPEN_PAR = 1/*OPEN_PAR*/;
  sc_Token.CLOSE_PAR = 2/*CLOSE_PAR*/;
  sc_Token.OPEN_BRACE = 3/*OPEN_BRACE*/;
  sc_Token.CLOSE_BRACE = 4/*CLOSE_BRACE*/;
  sc_Token.OPEN_BRACKET = 5/*OPEN_BRACKET*/;
  sc_Token.CLOSE_BRACKET = 6/*CLOSE_BRACKET*/;
  sc_Token.WHITESPACE = 7/*WHITESPACE*/;
  sc_Token.QUOTE = 8/*QUOTE*/;
  sc_Token.ID = 9/*ID*/;
  sc_Token.DOT = 10/*DOT*/;
  sc_Token.STRING = 11/*STRING*/;
  sc_Token.NUMBER = 12/*NUMBER*/;
  sc_Token.ERROR = 13/*ERROR*/;
  sc_Token.VECTOR_BEGIN = 14/*VECTOR_BEGIN*/;
  sc_Token.TRUE = 15/*TRUE*/;
  sc_Token.FALSE = 16/*FALSE*/;
  sc_Token.UNSPECIFIED = 17/*UNSPECIFIED*/;
  sc_Token.REFERENCE = 18/*REFERENCE*/;
  sc_Token.STORE = 19/*STORE*/;
  sc_Token.CHAR = 20/*CHAR*/;
  
  var SC_ID_CLASS = SC_LOWER_CLASS + SC_UPPER_CLASS + "!$%*+-./:<=>?@^_~";
  function sc_Tokenizer(port) {
      this.port = port;
  }
  sc_Tokenizer.prototype.peekToken = function() {
      if (this.peeked)
  	return this.peeked;
      var newToken = this.nextToken();
      this.peeked = newToken;
      return newToken;
  };
  sc_Tokenizer.prototype.readToken = function() {
      var tmp = this.peekToken();
      delete this.peeked;
      return tmp;
  };
  sc_Tokenizer.prototype.nextToken = function() {
      var port = this.port;
  
      function isNumberChar(c) {
  	return (c >= "0" && c <= "9");
      };
      function isIdOrNumberChar(c) {
  	return SC_ID_CLASS.indexOf(c) != -1 || // ID-char
  	    (c >= "0" && c <= "9");
      }
      function isWhitespace(c) {
  	return c === " " || c === "\r" || c === "\n" || c === "\t" || c === "\f";
      };
      function isWhitespaceOrEOF(c) {
  	return isWhitespace(c) || c === SC_EOF_OBJECT;
      };
  
      function readString() {
  	res = "";
  	while (true) {
  	    var c = port.readChar();
  	    switch (c) {
  	    case '"':
  		return new sc_Token(11/*STRING*/, res);
  	    case "\\":
  		var tmp = port.readChar();
  		switch (tmp) {
  		case '0': res += "\0"; break;
  		case 'a': res += "\a"; break;
  		case 'b': res += "\b"; break;
  		case 'f': res += "\f"; break;
  		case 'n': res += "\n"; break;
  		case 'r': res += "\r"; break;
  		case 't': res += "\t"; break;
  		case 'v': res += "\v"; break;
  		case '"': res += '"'; break;
  		case '\\': res += '\\'; break;
  		case 'x':
  		    /* hexa-number */
  		    var nb = 0;
  		    while (true) {
  			var hexC = port.peekChar();
  			if (hexC >= '0' && hexC <= '9') {
  			    port.readChar();
  			    nb = nb * 16 + hexC.charCodeAt(0) - '0'.charCodeAt(0);
  			} else if (hexC >= 'a' && hexC <= 'f') {
  			    port.readChar();
  			    nb = nb * 16 + hexC.charCodeAt(0) - 'a'.charCodeAt(0);
  			} else if (hexC >= 'A' && hexC <= 'F') {
  			    port.readChar();
  			    nb = nb * 16 + hexC.charCodeAt(0) - 'A'.charCodeAt(0);
  			} else {
  			    // next char isn't part of hex.
  			    res += String.fromCharCode(nb);
  			    break;
  			}
  		    }
  		    break;
  		default:
  		    if (tmp === SC_EOF_OBJECT) {
  			return new sc_Token(13/*ERROR*/, "unclosed string-literal" + res);
  		    }
  		    res += tmp;
  		}
  		break;
  	    default:
  		if (c === SC_EOF_OBJECT) {
  		    return new sc_Token(13/*ERROR*/, "unclosed string-literal" + res);
  		}
  		res += c;
  	    }
  	}
      };
      function readIdOrNumber(firstChar) {
  	var res = firstChar;
  	while (isIdOrNumberChar(port.peekChar()))
  	    res += port.readChar();
  	if (isNaN(res))
  	    return new sc_Token(9/*ID*/, res);
  	else
  	    return new sc_Token(12/*NUMBER*/, res - 0);
      };
  
      function skipWhitespaceAndComments() {
  	var done = false;
  	while (!done) {
  	    done = true;
  	    while (isWhitespace(port.peekChar()))
  		port.readChar();
  	    if (port.peekChar() === ';') {
  		port.readChar();
  		done = false;
  		while (true) {
  		    curChar = port.readChar();
  		    if (curChar === SC_EOF_OBJECT ||
  			curChar === '\n')
  			break;
  		}
  	    }
  	}
      };
  
      function readDot() {
  	if (isWhitespace(port.peekChar()))
  	    return new sc_Token(10/*DOT*/);
  	else
  	    return readIdOrNumber(".");
      };
  
      function readSharp() {
  	var c = port.readChar();
  	if (isWhitespace(c))
  	    return new sc_Token(13/*ERROR*/, "bad #-pattern0.");
  
  	// reference
  	if (isNumberChar(c)) {
  	    var nb = c - 0;
  	    while (isNumberChar(port.peekChar()))
  		nb = nb*10 + (port.readChar() - 0);
  	    switch (port.readChar()) {
  	    case '#':
  		return new sc_Token(18/*REFERENCE*/, nb);
  	    case '=':
  		return new sc_Token(19/*STORE*/, nb);
  	    default:
  		return new sc_Token(13/*ERROR*/, "bad #-pattern1." + nb);
  	    }
  	}
  
  	if (c === "(")
  	    return new sc_Token(14/*VECTOR_BEGIN*/);
  	
  	if (c === "\\") { // character
  	    var tmp = ""
  	    while (!isWhitespaceOrEOF(port.peekChar()))
  		tmp += port.readChar();
  	    switch (tmp.length) {
  	    case 0: // it's escaping a whitespace char:
  		if (sc_isEOFObject(port.peekChar))
  		    return new sc_Token(13/*ERROR*/, "bad #-pattern2.");
  		else
  		    return new sc_Token(20/*CHAR*/, port.readChar());
  	    case 1:
  		return new sc_Token(20/*CHAR*/, tmp);
  	    default:
  		var entry = sc_Char.readable2char[tmp.toLowerCase()];
  		if (entry)
  		    return new sc_Token(20/*CHAR*/, entry);
  		else
  		    return new sc_Token(13/*ERROR*/, "unknown character description: #\\" + tmp);
  	    }
  	}
  
  	// some constants (#t, #f, #unspecified)
  	var res;
  	var needing;
  	switch (c) {
  	case 't': res = new sc_Token(15/*TRUE*/, true); needing = ""; break;
  	case 'f': res = new sc_Token(16/*FALSE*/, false); needing = ""; break;
  	case 'u': res = new sc_Token(17/*UNSPECIFIED*/, undefined); needing = "nspecified"; break;
  	default:
  	    return new sc_Token(13/*ERROR*/, "bad #-pattern3: " + c);
  	}
  	while(true) {
  	    c = port.peekChar();
  	    if ((isWhitespaceOrEOF(c) || c === ')') &&
  		needing == "")
  		return res;
  	    else if (isWhitespace(c) || needing == "")
  		return new sc_Token(13/*ERROR*/, "bad #-pattern4 " + c + " " + needing);
  	    else if (needing.charAt(0) == c) {
  		port.readChar(); // consume
  		needing = needing.slice(1);
  	    } else
  		return new sc_Token(13/*ERROR*/, "bad #-pattern5");
  	}
  	
      };
  
      skipWhitespaceAndComments();
      var curChar = port.readChar();
      if (curChar === SC_EOF_OBJECT)
  	return new sc_Token(0/*EOF*/, curChar);
      switch (curChar)
      {
      case " ":
      case "\n":
      case "\t":
  	return readWhitespace();
      case "(":
  	return new sc_Token(1/*OPEN_PAR*/);
      case ")":
  	return new sc_Token(2/*CLOSE_PAR*/);
      case "{":
  	return new sc_Token(3/*OPEN_BRACE*/);
      case "}":
  	return new sc_Token(4/*CLOSE_BRACE*/);
      case "[":
  	return new sc_Token(5/*OPEN_BRACKET*/);
      case "]":
  	return new sc_Token(6/*CLOSE_BRACKET*/);
      case "'":
  	return new sc_Token(8/*QUOTE*/);
      case "#":
  	return readSharp();
      case ".":
  	return readDot();
      case '"':
  	return readString();
      default:
  	if (isIdOrNumberChar(curChar))
  	    return readIdOrNumber(curChar);
  	throw "unexpected character: " + curChar;
      }
  };
  
  function sc_Reader(tokenizer) {
      this.tokenizer = tokenizer;
      this.backref = new Array();
  }
  sc_Reader.prototype.read = function() {
      function readList(listBeginType) {
  	function matchesPeer(open, close) {
  	    return open === 1/*OPEN_PAR*/ && close === 2/*CLOSE_PAR*/
  	    	|| open === 3/*OPEN_BRACE*/ && close === 4/*CLOSE_BRACE*/
  		|| open === 5/*OPEN_BRACKET*/ && close === 6/*CLOSE_BRACKET*/;
  	};
  	var res = null;
  
  	while (true) {
  	    var token = tokenizer.peekToken();
  
  	    switch (token.type) {
  	    case 2/*CLOSE_PAR*/:
  	    case 4/*CLOSE_BRACE*/:
  	    case 6/*CLOSE_BRACKET*/:
  		if (matchesPeer(listBeginType, token.type)) {
  		    tokenizer.readToken(); // consume token
  		    return sc_reverseBang(res);
  		} else
  		    throw "closing par doesn't match: " + listBeginType
  			+ " " + listEndType;
  
  	    case 0/*EOF*/:
  		throw "unexpected end of file";
  
  	    case 10/*DOT*/:
  		tokenizer.readToken(); // consume token
  		var cdr = this.read();
  		var par = tokenizer.readToken();
  		if (!matchesPeer(listBeginType, par.type))
  		    throw "closing par doesn't match: " + listBeginType
  			+ " " + par.type;
  		else
  		    return sc_reverseAppendBang(res, cdr);
  		
  
  	    default:
  		res = sc_cons(this.read(), res);
  	    }
  	}
      };
      function readQuote() {
  	return sc_cons("quote", sc_cons(this.read(), null));
      };
      function readVector() {
  	// opening-parenthesis is already consumed
  	var a = new Array();
  	while (true) {
  	    var token = tokenizer.peekToken();
  	    switch (token.type) {
  	    case 2/*CLOSE_PAR*/:
  		tokenizer.readToken();
  		return a;
  		
  	    default:
  		a.push(this.read());
  	    }
  	}
      };
  
      function storeRefence(nb) {
  	var tmp = this.read();
  	this.backref[nb] = tmp;
  	return tmp;
      };
  	
      function readReference(nb) {
  	if (nb in this.backref)
  	    return this.backref[nb];
  	else
  	    throw "bad reference: " + nb;
      };
  
      var tokenizer = this.tokenizer;
  
      var token = tokenizer.readToken();
  
      // handle error
      if (token.type === 13/*ERROR*/)
  	throw token.val;
  
      switch (token.type) {
      case 1/*OPEN_PAR*/:
      case 3/*OPEN_BRACE*/:
      case 5/*OPEN_BRACKET*/:
  	return readList.call(this, token.type);
      case 8/*QUOTE*/:
  	return readQuote.call(this);
      case 11/*STRING*/:
  	return sc_jsstring2string(token.val);
      case 20/*CHAR*/:
  	return new sc_Char(token.val);
      case 14/*VECTOR_BEGIN*/:
  	return readVector.call(this);
      case 18/*REFERENCE*/:
  	return readReference.call(this, token.val);
      case 19/*STORE*/:
  	return storeRefence.call(this, token.val);
      case 9/*ID*/:
  	return sc_jsstring2symbol(token.val);
      case 0/*EOF*/:
      case 12/*NUMBER*/:
      case 15/*TRUE*/:
      case 16/*FALSE*/:
      case 17/*UNSPECIFIED*/:
  	return token.val;
      default:
  	throw "unexpected token " + token.type + " " + token.val;
      }
  };
  
  /*** META ((export #t)) */
  function sc_read(port) {
      if (port === undefined) // we assume the port hasn't been given.
  	port = SC_DEFAULT_IN; // THREAD: shared var...
      var reader = new sc_Reader(new sc_Tokenizer(port));
      return reader.read();
  }
  /*** META ((export #t)) */
  function sc_readChar(port) {
      if (port === undefined) // we assume the port hasn't been given.
  	port = SC_DEFAULT_IN; // THREAD: shared var...
      var t = port.readChar();
      return t === SC_EOF_OBJECT? t: new sc_Char(t);
  }
  /*** META ((export #t)) */
  function sc_peekChar(port) {
      if (port === undefined) // we assume the port hasn't been given.
  	port = SC_DEFAULT_IN; // THREAD: shared var...
      var t = port.peekChar();
      return t === SC_EOF_OBJECT? t: new sc_Char(t);
  }
  /*** META ((export #t)
             (type bool))
  */
  function sc_isCharReady(port) {
      if (port === undefined) // we assume the port hasn't been given.
  	port = SC_DEFAULT_IN; // THREAD: shared var...
      return port.isCharReady();
  }
  /*** META ((export #t)
             (peephole (postfix ".close()")))
  */
  function sc_closeInputPort(p) {
      return p.close();
  }
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix " instanceof sc_InputPort")))
  */
  function sc_isInputPort(o) {
      return (o instanceof sc_InputPort);
  }
  
  /*** META ((export eof-object?)
             (type bool)
             (peephole (postfix " === SC_EOF_OBJECT")))
  */
  function sc_isEOFObject(o) {
      return o === SC_EOF_OBJECT;
  }
  
  /*** META ((export #t)
             (peephole (hole 0 "SC_DEFAULT_IN")))
  */
  function sc_currentInputPort() {
      return SC_DEFAULT_IN;
  }
  
  /* ------------ file operations are not supported -----------*/
  /*** META ((export #t)) */
  function sc_callWithInputFile(s, proc) {
      throw "can't open " + s;
  }
  
  /*** META ((export #t)) */
  function sc_callWithOutputFile(s, proc) {
      throw "can't open " + s;
  }
  
  /*** META ((export #t)) */
  function sc_withInputFromFile(s, thunk) {
      throw "can't open " + s;
  }
  
  /*** META ((export #t)) */
  function sc_withOutputToFile(s, thunk) {
      throw "can't open " + s;
  }
  
  /*** META ((export #t)) */
  function sc_openInputFile(s) {
      throw "can't open " + s;
  }
  
  /*** META ((export #t)) */
  function sc_openOutputFile(s) {
      throw "can't open " + s;
  }
  
  /* ----------------------------------------------------------------------------*/
  /*** META ((export #t)) */
  function sc_basename(p) {
     var i = p.lastIndexOf('/');
  
     if(i >= 0)
        return p.substring(i + 1, p.length);
     else
        return '';
  }
  
  /*** META ((export #t)) */
  function sc_dirname(p) {
     var i = p.lastIndexOf('/');
  
     if(i >= 0)
        return p.substring(0, i);
     else
        return '';
  }
  
  /* ----------------------------------------------------------------------------*/
  
  /*** META ((export #t)) */
  function sc_withInputFromPort(p, thunk) {
      try {
  	var tmp = SC_DEFAULT_IN; // THREAD: shared var.
  	SC_DEFAULT_IN = p;
  	return thunk();
      } finally {
  	SC_DEFAULT_IN = tmp;
      }
  }
  
  /*** META ((export #t)) */
  function sc_withInputFromString(s, thunk) {
      return sc_withInputFromPort(new sc_StringInputPort(sc_string2jsstring(s)), thunk);
  }
  
  /*** META ((export #t)) */
  function sc_withOutputToPort(p, thunk) {
      try {
  	var tmp = SC_DEFAULT_OUT; // THREAD: shared var.
  	SC_DEFAULT_OUT = p;
  	return thunk();
      } finally {
  	SC_DEFAULT_OUT = tmp;
      }
  }
  
  /*** META ((export #t)) */
  function sc_withOutputToString(thunk) {
      var p = new sc_StringOutputPort();
      sc_withOutputToPort(p, thunk);
      return p.close();
  }
  
  /*** META ((export #t)) */
  function sc_withOutputToProcedure(proc, thunk) {
      var t = function(s) { proc(sc_jsstring2string(s)); };
      return sc_withOutputToPort(new sc_GenericOutputPort(t), thunk);
  }
  
  /*** META ((export #t)
             (peephole (hole 0 "new sc_StringOutputPort()")))
  */
  function sc_openOutputString() {
      return new sc_StringOutputPort();
  }
  
  /*** META ((export #t)) */
  function sc_openInputString(str) {
      return new sc_StringInputPort(sc_string2jsstring(str));
  }
  
  /* ----------------------------------------------------------------------------*/
  
  function sc_OutputPort() {
  }
  sc_OutputPort.prototype = new sc_Port();
  sc_OutputPort.prototype.appendJSString = function(obj) {
      /* do nothing */
  }
  sc_OutputPort.prototype.close = function() {
      /* do nothing */
  }
  
  function sc_StringOutputPort() {
      this.res = "";
  }
  sc_StringOutputPort.prototype = new sc_OutputPort();
  sc_StringOutputPort.prototype.appendJSString = function(s) {
      this.res += s;
  }
  sc_StringOutputPort.prototype.close = function() {
      return sc_jsstring2string(this.res);
  }
  
  /*** META ((export #t)) */
  function sc_getOutputString(sp) {
      return sc_jsstring2string(sp.res);
  }
  
  
  function sc_ErrorOutputPort() {
  }
  sc_ErrorOutputPort.prototype = new sc_OutputPort();
  sc_ErrorOutputPort.prototype.appendJSString = function(s) {
      throw "don't write on ErrorPort!";
  }
  sc_ErrorOutputPort.prototype.close = function() {
      /* do nothing */
  }
  
  function sc_GenericOutputPort(appendJSString, close) {
      this.appendJSString = appendJSString;
      if (close)
  	this.close = close;
  }
  sc_GenericOutputPort.prototype = new sc_OutputPort();
  
  /*** META ((export #t)
             (type bool)
             (peephole (postfix " instanceof sc_OutputPort")))
  */
  function sc_isOutputPort(o) {
      return (o instanceof sc_OutputPort);
  }
  
  /*** META ((export #t)
             (peephole (postfix ".close()")))
  */
  function sc_closeOutputPort(p) {
      return p.close();
  }
  
  /* ------------------ write ---------------------------------------------------*/
  
  /*** META ((export #t)) */
  function sc_write(o, p) {
      if (p === undefined) // we assume not given
  	p = SC_DEFAULT_OUT;
      p.appendJSString(sc_toWriteString(o));
  }
  
  function sc_toWriteString(o) {
      if (o === null)
  	return "()";
      else if (o === true)
  	return "#t";
      else if (o === false)
  	return "#f";
      else if (o === undefined)
  	return "#unspecified";
      else if (typeof o === 'function')
  	return "#<procedure " + sc_hash(o) + ">";
      else if (o.sc_toWriteString)
  	return o.sc_toWriteString();
      else
  	return o.toString();
  }
  
  function sc_escapeWriteString(s) {
      var res = "";
      var j = 0;
      for (i = 0; i < s.length; i++) {
  	switch (s.charAt(i)) {
  	case "\0": res += s.substring(j, i) + "\\0"; j = i + 1; break;
  	case "\b": res += s.substring(j, i) + "\\b"; j = i + 1; break;
  	case "\f": res += s.substring(j, i) + "\\f"; j = i + 1; break;
  	case "\n": res += s.substring(j, i) + "\\n"; j = i + 1; break;
  	case "\r": res += s.substring(j, i) + "\\r"; j = i + 1; break;
  	case "\t": res += s.substring(j, i) + "\\t"; j = i + 1; break;
  	case "\v": res += s.substring(j, i) + "\\v"; j = i + 1; break;
  	case '"': res += s.substring(j, i) + '\\"'; j = i + 1; break;
  	case "\\": res += s.substring(j, i) + "\\\\"; j = i + 1; break;
  	default:
  	    var c = s.charAt(i);
  	    if ("\a" !== "a" && c == "\a") {
  		res += s.substring(j, i) + "\\a"; j = i + 1; continue;
  	    }
  	    if ("\v" !== "v" && c == "\v") {
  		res += s.substring(j, i) + "\\v"; j = i + 1; continue;
  	    }
  	    //if (s.charAt(i) < ' ' || s.charCodeAt(i) > 127) {
  	    // CARE: Manuel is this OK with HOP?
  	    if (s.charAt(i) < ' ') {
  		/* non printable character and special chars */
  		res += s.substring(j, i) + "\\x" + s.charCodeAt(i).toString(16);
  		j = i + 1;
  	    }
  	    // else just let i increase...
  	}
      }
      res += s.substring(j, i);
      return res;
  }
  
  /* ------------------ display ---------------------------------------------------*/
  
  /*** META ((export #t)) */
  function sc_display(o, p) {
      if (p === undefined) // we assume not given
  	p = SC_DEFAULT_OUT;
      p.appendJSString(sc_toDisplayString(o));
  }
  
  function sc_toDisplayString(o) {
      if (o === null)
  	return "()";
      else if (o === true)
  	return "#t";
      else if (o === false)
  	return "#f";
      else if (o === undefined)
  	return "#unspecified";
      else if (typeof o === 'function')
  	return "#<procedure " + sc_hash(o) + ">";
      else if (o.sc_toDisplayString)
  	return o.sc_toDisplayString();
      else
  	return o.toString();
  }
  
  /* ------------------ newline ---------------------------------------------------*/
  
  /*** META ((export #t)) */
  function sc_newline(p) {
      if (p === undefined) // we assume not given
  	p = SC_DEFAULT_OUT;
      p.appendJSString("\n");
  }
  
  /* ------------------ write-char ---------------------------------------------------*/
  
  /*** META ((export #t)) */
  function sc_writeChar(c, p) {
      if (p === undefined) // we assume not given
  	p = SC_DEFAULT_OUT;
      p.appendJSString(c.val);
  }
  
  /* ------------------ write-circle ---------------------------------------------------*/
  
  /*** META ((export #t)) */
  function sc_writeCircle(o, p) {
      if (p === undefined) // we assume not given
  	p = SC_DEFAULT_OUT;
      p.appendJSString(sc_toWriteCircleString(o));
  }
  
  function sc_toWriteCircleString(o) {
      var symb = sc_gensym("writeCircle");
      var nbPointer = new Object();
      nbPointer.nb = 0;
      sc_prepWriteCircle(o, symb, nbPointer);
      return sc_genToWriteCircleString(o, symb);
  }
  
  function sc_prepWriteCircle(o, symb, nbPointer) {
      // TODO sc_Struct
      if (o instanceof sc_Pair ||
  	o instanceof sc_Vector) {
  	if (o[symb] !== undefined) {
  	    // not the first visit.
  	    o[symb]++;
  	    // unless there is already a number, assign one.
  	    if (!o[symb + "nb"]) o[symb + "nb"] = nbPointer.nb++;
  	    return;
  	}
  	o[symb] = 0;
  	if (o instanceof sc_Pair) {
  	    sc_prepWriteCircle(o.car, symb, nbPointer);
  	    sc_prepWriteCircle(o.cdr, symb, nbPointer);
  	} else {
  	    for (var i = 0; i < o.length; i++)
  		sc_prepWriteCircle(o[i], symb, nbPointer);
  	}
      }
  }
  
  function sc_genToWriteCircleString(o, symb) {
      if (!(o instanceof sc_Pair ||
  	  o instanceof sc_Vector))
  	return sc_toWriteString(o);
      return o.sc_toWriteCircleString(symb);
  }
  sc_Pair.prototype.sc_toWriteCircleString = function(symb, inList) {
      if (this[symb + "use"]) { // use-flag is set. Just use it.
  	var nb = this[symb + "nb"];
  	if (this[symb]-- === 0) { // if we are the last use. remove all fields.
  	    delete this[symb];
  	    delete this[symb + "nb"];
  	    delete this[symb + "use"];
  	}
  	if (inList)
  	    return '. #' + nb + '#';
  	else
  	    return '#' + nb + '#';
      }
      if (this[symb]-- === 0) { // if we are the last use. remove all fields.
  	delete this[symb];
  	delete this[symb + "nb"];
  	delete this[symb + "use"];
      }
  
      var res = "";
  
      if (this[symb] !== undefined) { // implies > 0
  	this[symb + "use"] = true;
  	if (inList)
  	    res += '. #' + this[symb + "nb"] + '=';
  	else
  	    res += '#' + this[symb + "nb"] + '=';
  	inList = false;
      }
  
      if (!inList)
  	res += "(";
  
      // print car
      res += sc_genToWriteCircleString(this.car, symb);
  
      if (sc_isPair(this.cdr)) {
  	res += " " + this.cdr.sc_toWriteCircleString(symb, true);
      } else if (this.cdr !== null) {
  	res += " . " + sc_genToWriteCircleString(this.cdr, symb);
      }
      if (!inList)
  	res += ")";
      return res;
  };
  sc_Vector.prototype.sc_toWriteCircleString = function(symb) {
      if (this[symb + "use"]) { // use-flag is set. Just use it.
  	var nb = this[symb + "nb"];
  	if (this[symb]-- === 0) { // if we are the last use. remove all fields.
  	    delete this[symb];
  	    delete this[symb + "nb"];
  	    delete this[symb + "use"];
  	}
  	return '#' + nb + '#';
      }
      if (this[symb]-- === 0) { // if we are the last use. remove all fields.
  	delete this[symb];
  	delete this[symb + "nb"];
  	delete this[symb + "use"];
      }
  
      var res = "";
      if (this[symb] !== undefined) { // implies > 0
  	this[symb + "use"] = true;
  	res += '#' + this[symb + "nb"] + '=';
      }
      res += "#(";
      for (var i = 0; i < this.length; i++) {
  	res += sc_genToWriteCircleString(this[i], symb);
  	if (i < this.length - 1) res += " ";
      }
      res += ")";
      return res;
  };
  
  
  /* ------------------ print ---------------------------------------------------*/
  
  /*** META ((export #t)) */
  function sc_print(s) {
      if (arguments.length === 1) {
  	sc_display(s);
  	sc_newline();
      }
      else {
  	for (var i = 0; i < arguments.length; i++)
  	    sc_display(arguments[i]);
  	sc_newline();
      }
  }
  
  /* ------------------ format ---------------------------------------------------*/
  /*** META ((export #t)) */
  function sc_format(s, args) {
     var len = s.length;
     var p = new sc_StringOutputPort();
     var i = 0, j = 1;
  
     while( i < len ) {
        var i2 = s.indexOf("~", i);
  
        if (i2 == -1) {
  	  p.appendJSString( s.substring( i, len ) );
  	  return p.close();
        } else {
  	 if (i2 > i) {
  	    if (i2 == (len - 1)) {
  		p.appendJSString(s.substring(i, len));
  		return p.close();
  	    } else {
  	       p.appendJSString(s.substring(i, i2));
  	       i = i2;
  	    }
  	 }
  
  	 switch(s.charCodeAt(i2 + 1)) {
  	    case 65:
  	    case 97:
  	       // a
  	       sc_display(arguments[j], p);
  	       i += 2; j++;
  	       break;
  
  	    case 83:
  	    case 115:
  	       // s
  	       sc_write(arguments[j], p);
  	       i += 2; j++;
  	       break;
  
  	    case 86:
  	    case 118:
  	       // v
  	       sc_display(arguments[j], p);
  	       p.appendJSString("\n");
  	       i += 2; j++;
  	       break;
  
  	    case 67:
  	    case 99:
  	       // c
  	       p.appendJSString(String.fromCharCode(arguments[j]));
  	       i += 2; j++;
  	       break;
  
  	    case 88:
  	    case 120:
  	       // x
  	       p.appendJSString(arguments[j].toString(6));
  	       i += 2; j++;
  	       break;
  
  	    case 79:
  	    case 111:
  	       // o
  	       p.appendJSString(arguments[j].toString(8));
  	       i += 2; j++;
  	       break;
  
  	    case 66:
  	    case 98:
  	       // b
  	       p.appendJSString(arguments[j].toString(2));
  	       i += 2; j++;
  	       break;
  
  	    case 37:
  	    case 110:
  	       // %, n
  	       p.appendJSString("\n");
  	       i += 2; break;
  
  	    case 114:
  	       // r
  	       p.appendJSString("\r");
  	       i += 2; break;
  
  	    case 126:
  	       // ~
  	       p.appendJSString("~");
  	       i += 2; break;
  
  	    default:
  	       sc_error( "format: illegal ~"
  			 + String.fromCharCode(s.charCodeAt(i2 + 1))
  			 + " sequence" );
  	       return "";
  	 }
        }
     }
  
     return p.close();
  }
  
  /* ------------------ global ports ---------------------------------------------------*/
  
  var SC_DEFAULT_IN = new sc_ErrorInputPort();
  var SC_DEFAULT_OUT = new sc_ErrorOutputPort();
  var SC_ERROR_OUT = new sc_ErrorOutputPort();
  
  var sc_SYMBOL_PREFIX = "\u1E9C";
  var sc_KEYWORD_PREFIX = "\u1E9D";
  
  /*** META ((export #t)
             (peephole (id))) */
  function sc_jsstring2string(s) {
      return s;
  }
  
  /*** META ((export #t)
             (peephole (prefix "'\\u1E9C' +")))
  */
  function sc_jsstring2symbol(s) {
      return sc_SYMBOL_PREFIX + s;
  }
  
  /*** META ((export #t)
             (peephole (id)))
  */
  function sc_string2jsstring(s) {
      return s;
  }
  
  /*** META ((export #t)
             (peephole (symbol2jsstring_immutable)))
  */
  function sc_symbol2jsstring(s) {
      return s.slice(1);
  }
  
  /*** META ((export #t)
             (peephole (postfix ".slice(1)")))
  */
  function sc_keyword2jsstring(k) {
      return k.slice(1);
  }
  
  /*** META ((export #t)
             (peephole (prefix "'\\u1E9D' +")))
  */
  function sc_jsstring2keyword(s) {
      return sc_KEYWORD_PREFIX + s;
  }
  
  /*** META ((export #t)
             (type bool))
  */
  function sc_isKeyword(s) {
      return (typeof s === "string") &&
  	(s.charAt(0) === sc_KEYWORD_PREFIX);
  }
  
  
  /*** META ((export #t)) */
  var sc_gensym = function() {
      var counter = 1000;
      return function(sym) {
  	counter++;
  	if (!sym) sym = sc_SYMBOL_PREFIX;
  	return sym + "s" + counter + "~" + "^sC-GeNsYm ";
      };
  }();
  
  
  /*** META ((export #t)
             (type bool))
  */
  function sc_isEqual(o1, o2) {
      return ((o1 === o2) ||
  	    (sc_isPair(o1) && sc_isPair(o2)
  	     && sc_isPairEqual(o1, o2, sc_isEqual)) ||
  	    (sc_isVector(o1) && sc_isVector(o2)
  	     && sc_isVectorEqual(o1, o2, sc_isEqual)));
  }
  
  /*** META ((export number->symbol integer->symbol)) */
  function sc_number2symbol(x, radix) {
      return sc_SYMBOL_PREFIX + sc_number2jsstring(x, radix);
  }
  
  /*** META ((export number->string integer->string)) */
  var sc_number2string = sc_number2jsstring;
  
  /*** META ((export #t)) */
  function sc_symbol2number(s, radix) {
      return sc_jsstring2number(s.slice(1), radix);
  }
  
  /*** META ((export #t)) */
  var sc_string2number = sc_jsstring2number;
  
  /*** META ((export #t)
             (peephole (prefix "+" s)))
             ;; peephole will only apply if no radix is given.
  */
  function sc_string2integer(s, radix) {
      if (!radix) return +s;
      return parseInt(s, radix);
  }
  
  /*** META ((export #t)
             (peephole (prefix "+")))
  */
  function sc_string2real(s) {
      return +s;
  }
  
  
  /*** META ((export #t)
             (type bool))
  */
  function sc_isSymbol(s) {
      return (typeof s === "string") &&
  	(s.charAt(0) === sc_SYMBOL_PREFIX);
  }
  
  /*** META ((export #t)
             (peephole (symbol2string_immutable)))
  */
  function sc_symbol2string(s) {
      return s.slice(1);
  }
  
  /*** META ((export #t)
             (peephole (prefix "'\\u1E9C' +")))
  */
  function sc_string2symbol(s) {
      return sc_SYMBOL_PREFIX + s;
  }
  
  /*** META ((export symbol-append)
             (peephole (symbolAppend_immutable)))
  */
  function sc_symbolAppend() {
      var res = sc_SYMBOL_PREFIX;
      for (var i = 0; i < arguments.length; i++)
  	res += arguments[i].slice(1);
      return res;
  }
  
  /*** META ((export #t)
             (peephole (postfix ".val")))
  */
  function sc_char2string(c) { return c.val; }
  
  /*** META ((export #t)
             (peephole (hole 1 "'\\u1E9C' + " c ".val")))
  */
  function sc_char2symbol(c) { return sc_SYMBOL_PREFIX + c.val; }
  
  /*** META ((export #t)
             (type bool))
  */
  function sc_isString(s) {
      return (typeof s === "string") &&
  	(s.charAt(0) !== sc_SYMBOL_PREFIX);
  }
  
  /*** META ((export #t)) */
  var sc_makeString = sc_makejsString;
  
  
  /*** META ((export #t)) */
  function sc_string() {
      for (var i = 0; i < arguments.length; i++)
  	arguments[i] = arguments[i].val;
      return "".concat.apply("", arguments);
  }
  
  /*** META ((export #t)
             (peephole (postfix ".length")))
  */
  function sc_stringLength(s) { return s.length; }
  
  /*** META ((export #t)) */
  function sc_stringRef(s, k) {
      return new sc_Char(s.charAt(k));
  }
  
  /* there's no stringSet in the immutable version
  function sc_stringSet(s, k, c)
  */
  
  
  /*** META ((export string=?)
  	   (type bool)
             (peephole (hole 2 str1 " === " str2)))
  */
  function sc_isStringEqual(s1, s2) {
      return s1 === s2;
  }
  /*** META ((export string<?)
  	   (type bool)
             (peephole (hole 2 str1 " < " str2)))
  */
  function sc_isStringLess(s1, s2) {
      return s1 < s2;
  }
  /*** META ((export string>?)
  	   (type bool)
             (peephole (hole 2 str1 " > " str2)))
  */
  function sc_isStringGreater(s1, s2) {
      return s1 > s2;
  }
  /*** META ((export string<=?)
  	   (type bool)
             (peephole (hole 2 str1 " <= " str2)))
  */
  function sc_isStringLessEqual(s1, s2) {
      return s1 <= s2;
  }
  /*** META ((export string>=?)
  	   (type bool)
             (peephole (hole 2 str1 " >= " str2)))
  */
  function sc_isStringGreaterEqual(s1, s2) {
      return s1 >= s2;
  }
  /*** META ((export string-ci=?)
  	   (type bool)
             (peephole (hole 2 str1 ".toLowerCase() === " str2 ".toLowerCase()")))
  */
  function sc_isStringCIEqual(s1, s2) {
      return s1.toLowerCase() === s2.toLowerCase();
  }
  /*** META ((export string-ci<?)
  	   (type bool)
             (peephole (hole 2 str1 ".toLowerCase() < " str2 ".toLowerCase()")))
  */
  function sc_isStringCILess(s1, s2) {
      return s1.toLowerCase() < s2.toLowerCase();
  }
  /*** META ((export string-ci>?)
  	   (type bool)
             (peephole (hole 2 str1 ".toLowerCase() > " str2 ".toLowerCase()")))
  */
  function sc_isStringCIGreater(s1, s2) {
      return s1.toLowerCase() > s2.toLowerCase();
  }
  /*** META ((export string-ci<=?)
  	   (type bool)
             (peephole (hole 2 str1 ".toLowerCase() <= " str2 ".toLowerCase()")))
  */
  function sc_isStringCILessEqual(s1, s2) {
      return s1.toLowerCase() <= s2.toLowerCase();
  }
  /*** META ((export string-ci>=?)
  	   (type bool)
             (peephole (hole 2 str1 ".toLowerCase() >= " str2 ".toLowerCase()")))
  */
  function sc_isStringCIGreaterEqual(s1, s2) {
      return s1.toLowerCase() >= s2.toLowerCase();
  }
  
  /*** META ((export #t)
             (peephole (hole 3 s ".substring(" start ", " end ")")))
  */
  function sc_substring(s, start, end) {
      return s.substring(start, end);
  }
  
  /*** META ((export #t))
  */
  function sc_isSubstring_at(s1, s2, i) {
      return s2 == s1.substring(i, i+ s2.length);
  }
  
  /*** META ((export #t)
             (peephole (infix 0 #f "+" "''")))
  */
  function sc_stringAppend() {
      return "".concat.apply("", arguments);
  }
  
  /*** META ((export #t)) */
  var sc_string2list = sc_jsstring2list;
  
  /*** META ((export #t)) */
  var sc_list2string = sc_list2jsstring;
  
  /*** META ((export #t)
             (peephole (id)))
  */
  function sc_stringCopy(s) {
      return s;
  }
  
  /* there's no string-fill in the immutable version
  function sc_stringFill(s, c)
  */
  
  /*** META ((export #t)
             (peephole (postfix ".slice(1)")))
  */
  function sc_keyword2string(o) {
      return o.slice(1);
  }
  
  /*** META ((export #t)
             (peephole (prefix "'\\u1E9D' +")))
  */
  function sc_string2keyword(o) {
      return sc_KEYWORD_PREFIX + o;
  }
  
  String.prototype.sc_toDisplayString = function() {
      if (this.charAt(0) === sc_SYMBOL_PREFIX)
  	// TODO: care for symbols with spaces (escape-chars symbols).
  	return this.slice(1);
      else if (this.charAt(0) === sc_KEYWORD_PREFIX)
  	return ":" + this.slice(1);
      else
  	return this.toString();
  };
  
  String.prototype.sc_toWriteString = function() {
      if (this.charAt(0) === sc_SYMBOL_PREFIX)
  	// TODO: care for symbols with spaces (escape-chars symbols).
  	return this.slice(1);
      else if (this.charAt(0) === sc_KEYWORD_PREFIX)
  	return ":" + this.slice(1);
      else
  	return '"' + sc_escapeWriteString(this) + '"';
  };
  /* Exported Variables */
  var BgL_testzd2boyerzd2;
  var BgL_nboyerzd2benchmarkzd2;
  var BgL_setupzd2boyerzd2;
  /* End Exports */
  
  var translate_term_nboyer;
  var translate_args_nboyer;
  var untranslate_term_nboyer;
  var BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer;
  var BgL_sc_za2symbolzd2recordszd2alistza2_2z00_nboyer;
  var translate_alist_nboyer;
  var apply_subst_nboyer;
  var apply_subst_lst_nboyer;
  var tautologyp_nboyer;
  var if_constructor_nboyer;
  var rewrite_count_nboyer;
  var rewrite_nboyer;
  var rewrite_args_nboyer;
  var unify_subst_nboyer;
  var one_way_unify1_nboyer;
  var false_term_nboyer;
  var true_term_nboyer;
  var trans_of_implies1_nboyer;
  var is_term_equal_nboyer;
  var is_term_member_nboyer;
  var const_nboyer;
  var sc_const_3_nboyer;
  var sc_const_4_nboyer;
  {
      (sc_const_4_nboyer = (new sc_Pair("\u1E9Cimplies",(new sc_Pair((new sc_Pair("\u1E9Cand",(new sc_Pair((new sc_Pair("\u1E9Cimplies",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cand",(new sc_Pair((new sc_Pair("\u1E9Cimplies",(new sc_Pair("\u1E9Cy",(new sc_Pair("\u1E9Cz",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cand",(new sc_Pair((new sc_Pair("\u1E9Cimplies",(new sc_Pair("\u1E9Cz",(new sc_Pair("\u1E9Cu",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cimplies",(new sc_Pair("\u1E9Cu",(new sc_Pair("\u1E9Cw",null)))))),null)))))),null)))))),null)))))),(new sc_Pair((new sc_Pair("\u1E9Cimplies",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cw",null)))))),null)))))));
      (sc_const_3_nboyer = sc_list((new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Ccompile",(new sc_Pair("\u1E9Cform",null)))),(new sc_Pair((new sc_Pair("\u1E9Creverse",(new sc_Pair((new sc_Pair("\u1E9Ccodegen",(new sc_Pair((new sc_Pair("\u1E9Coptimize",(new sc_Pair("\u1E9Cform",null)))),(new sc_Pair((new sc_Pair("\u1E9Cnil",null)),null)))))),null)))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Ceqp",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cfix",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Cfix",(new sc_Pair("\u1E9Cy",null)))),null)))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cgreaterp",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair((new sc_Pair("\u1E9Clessp",(new sc_Pair("\u1E9Cy",(new sc_Pair("\u1E9Cx",null)))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Clesseqp",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cnot",(new sc_Pair((new sc_Pair("\u1E9Clessp",(new sc_Pair("\u1E9Cy",(new sc_Pair("\u1E9Cx",null)))))),null)))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cgreatereqp",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cnot",(new sc_Pair((new sc_Pair("\u1E9Clessp",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),null)))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cboolean",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Cor",(new sc_Pair((new sc_Pair("\u1E9Cequal",(new sc_Pair("\u1E9Cx",(new sc_Pair((new sc_Pair("\u1E9Ct",null)),null)))))),(new sc_Pair((new sc_Pair("\u1E9Cequal",(new sc_Pair("\u1E9Cx",(new sc_Pair((new sc_Pair("\u1E9Cf",null)),null)))))),null)))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Ciff",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cand",(new sc_Pair((new sc_Pair("\u1E9Cimplies",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cimplies",(new sc_Pair("\u1E9Cy",(new sc_Pair("\u1E9Cx",null)))))),null)))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Ceven1",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Czerop",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Ct",null)),(new sc_Pair((new sc_Pair("\u1E9Codd",(new sc_Pair((new sc_Pair("\u1E9Csub1",(new sc_Pair("\u1E9Cx",null)))),null)))),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Ccountps-",(new sc_Pair("\u1E9Cl",(new sc_Pair("\u1E9Cpred",null)))))),(new sc_Pair((new sc_Pair("\u1E9Ccountps-loop",(new sc_Pair("\u1E9Cl",(new sc_Pair("\u1E9Cpred",(new sc_Pair((new sc_Pair("\u1E9Czero",null)),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cfact-",(new sc_Pair("\u1E9Ci",null)))),(new sc_Pair((new sc_Pair("\u1E9Cfact-loop",(new sc_Pair("\u1E9Ci",(new sc_Pair((1),null)))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Creverse-",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Creverse-loop",(new sc_Pair("\u1E9Cx",(new sc_Pair((new sc_Pair("\u1E9Cnil",null)),null)))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cdivides",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair((new sc_Pair("\u1E9Czerop",(new sc_Pair((new sc_Pair("\u1E9Cremainder",(new sc_Pair("\u1E9Cy",(new sc_Pair("\u1E9Cx",null)))))),null)))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cassume-true",(new sc_Pair("\u1E9Cvar",(new sc_Pair("\u1E9Calist",null)))))),(new sc_Pair((new sc_Pair("\u1E9Ccons",(new sc_Pair((new sc_Pair("\u1E9Ccons",(new sc_Pair("\u1E9Cvar",(new sc_Pair((new sc_Pair("\u1E9Ct",null)),null)))))),(new sc_Pair("\u1E9Calist",null)))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cassume-false",(new sc_Pair("\u1E9Cvar",(new sc_Pair("\u1E9Calist",null)))))),(new sc_Pair((new sc_Pair("\u1E9Ccons",(new sc_Pair((new sc_Pair("\u1E9Ccons",(new sc_Pair("\u1E9Cvar",(new sc_Pair((new sc_Pair("\u1E9Cf",null)),null)))))),(new sc_Pair("\u1E9Calist",null)))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Ctautology-checker",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Ctautologyp",(new sc_Pair((new sc_Pair("\u1E9Cnormalize",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Cnil",null)),null)))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cfalsify",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Cfalsify1",(new sc_Pair((new sc_Pair("\u1E9Cnormalize",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Cnil",null)),null)))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cprime",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Cand",(new sc_Pair((new sc_Pair("\u1E9Cnot",(new sc_Pair((new sc_Pair("\u1E9Czerop",(new sc_Pair("\u1E9Cx",null)))),null)))),(new sc_Pair((new sc_Pair("\u1E9Cnot",(new sc_Pair((new sc_Pair("\u1E9Cequal",(new sc_Pair("\u1E9Cx",(new sc_Pair((new sc_Pair("\u1E9Cadd1",(new sc_Pair((new sc_Pair("\u1E9Czero",null)),null)))),null)))))),null)))),(new sc_Pair((new sc_Pair("\u1E9Cprime1",(new sc_Pair("\u1E9Cx",(new sc_Pair((new sc_Pair("\u1E9Csub1",(new sc_Pair("\u1E9Cx",null)))),null)))))),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cand",(new sc_Pair("\u1E9Cp",(new sc_Pair("\u1E9Cq",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair("\u1E9Cp",(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair("\u1E9Cq",(new sc_Pair((new 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sc_Pair("\u1E9Cadd1",(new sc_Pair("\u1E9Cy",null)))),null)))))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Cnumberp",(new sc_Pair("\u1E9Cy",null)))),(new sc_Pair((new sc_Pair("\u1E9Cplus",(new sc_Pair("\u1E9Cx",(new sc_Pair((new sc_Pair("\u1E9Ctimes",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),null)))))),(new sc_Pair((new sc_Pair("\u1E9Cfix",(new sc_Pair("\u1E9Cx",null)))),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cnth",(new sc_Pair((new sc_Pair("\u1E9Cnil",null)),(new sc_Pair("\u1E9Ci",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Czerop",(new sc_Pair("\u1E9Ci",null)))),(new sc_Pair((new sc_Pair("\u1E9Cnil",null)),(new sc_Pair((new sc_Pair("\u1E9Czero",null)),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Clast",(new sc_Pair((new sc_Pair("\u1E9Cappend",(new sc_Pair("\u1E9Ca",(new sc_Pair("\u1E9Cb",null)))))),null)))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Clistp",(new sc_Pair("\u1E9Cb",null)))),(new sc_Pair((new sc_Pair("\u1E9Clast",(new sc_Pair("\u1E9Cb",null)))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Clistp",(new sc_Pair("\u1E9Ca",null)))),(new sc_Pair((new sc_Pair("\u1E9Ccons",(new sc_Pair((new sc_Pair("\u1E9Ccar",(new sc_Pair((new sc_Pair("\u1E9Clast",(new sc_Pair("\u1E9Ca",null)))),null)))),(new sc_Pair("\u1E9Cb",null)))))),(new sc_Pair("\u1E9Cb",null)))))))),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Clessp",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair("\u1E9Cz",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Clessp",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Ct",null)),(new sc_Pair("\u1E9Cz",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cf",null)),(new sc_Pair("\u1E9Cz",null)))))),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cassignment",(new sc_Pair("\u1E9Cx",(new sc_Pair((new sc_Pair("\u1E9Cappend",(new sc_Pair("\u1E9Ca",(new sc_Pair("\u1E9Cb",null)))))),null)))))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Cassignedp",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Ca",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cassignment",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Ca",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cassignment",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cb",null)))))),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Ccar",(new sc_Pair((new sc_Pair("\u1E9Cgopher",(new sc_Pair("\u1E9Cx",null)))),null)))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Clistp",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Ccar",(new sc_Pair((new sc_Pair("\u1E9Cflatten",(new sc_Pair("\u1E9Cx",null)))),null)))),(new sc_Pair((new sc_Pair("\u1E9Czero",null)),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cflatten",(new sc_Pair((new sc_Pair("\u1E9Ccdr",(new sc_Pair((new sc_Pair("\u1E9Cgopher",(new sc_Pair("\u1E9Cx",null)))),null)))),null)))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Clistp",(new sc_Pair("\u1E9Cx",null)))),(new sc_Pair((new sc_Pair("\u1E9Ccdr",(new sc_Pair((new sc_Pair("\u1E9Cflatten",(new sc_Pair("\u1E9Cx",null)))),null)))),(new sc_Pair((new sc_Pair("\u1E9Ccons",(new sc_Pair((new sc_Pair("\u1E9Czero",null)),(new sc_Pair((new sc_Pair("\u1E9Cnil",null)),null)))))),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cquotient",(new sc_Pair((new sc_Pair("\u1E9Ctimes",(new sc_Pair("\u1E9Cy",(new sc_Pair("\u1E9Cx",null)))))),(new sc_Pair("\u1E9Cy",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Czerop",(new sc_Pair("\u1E9Cy",null)))),(new sc_Pair((new sc_Pair("\u1E9Czero",null)),(new sc_Pair((new sc_Pair("\u1E9Cfix",(new sc_Pair("\u1E9Cx",null)))),null)))))))),null)))))), (new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cget",(new sc_Pair("\u1E9Cj",(new sc_Pair((new sc_Pair("\u1E9Cset",(new sc_Pair("\u1E9Ci",(new sc_Pair("\u1E9Cval",(new sc_Pair("\u1E9Cmem",null)))))))),null)))))),(new sc_Pair((new sc_Pair("\u1E9Cif",(new sc_Pair((new sc_Pair("\u1E9Ceqp",(new sc_Pair("\u1E9Cj",(new sc_Pair("\u1E9Ci",null)))))),(new sc_Pair("\u1E9Cval",(new sc_Pair((new sc_Pair("\u1E9Cget",(new sc_Pair("\u1E9Cj",(new sc_Pair("\u1E9Cmem",null)))))),null)))))))),null))))))));
      (const_nboyer = (new sc_Pair((new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cf",(new sc_Pair((new sc_Pair("\u1E9Cplus",(new sc_Pair((new sc_Pair("\u1E9Cplus",(new sc_Pair("\u1E9Ca",(new sc_Pair("\u1E9Cb",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cplus",(new sc_Pair("\u1E9Cc",(new sc_Pair((new sc_Pair("\u1E9Czero",null)),null)))))),null)))))),null)))))),(new sc_Pair((new sc_Pair("\u1E9Cy",(new sc_Pair("\u1E9Cf",(new sc_Pair((new sc_Pair("\u1E9Ctimes",(new sc_Pair((new sc_Pair("\u1E9Ctimes",(new sc_Pair("\u1E9Ca",(new sc_Pair("\u1E9Cb",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cplus",(new sc_Pair("\u1E9Cc",(new sc_Pair("\u1E9Cd",null)))))),null)))))),null)))))),(new sc_Pair((new sc_Pair("\u1E9Cz",(new sc_Pair("\u1E9Cf",(new sc_Pair((new sc_Pair("\u1E9Creverse",(new sc_Pair((new sc_Pair("\u1E9Cappend",(new sc_Pair((new sc_Pair("\u1E9Cappend",(new sc_Pair("\u1E9Ca",(new sc_Pair("\u1E9Cb",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cnil",null)),null)))))),null)))),null)))))),(new sc_Pair((new sc_Pair("\u1E9Cu",(new sc_Pair("\u1E9Cequal",(new sc_Pair((new sc_Pair("\u1E9Cplus",(new sc_Pair("\u1E9Ca",(new sc_Pair("\u1E9Cb",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cdifference",(new sc_Pair("\u1E9Cx",(new sc_Pair("\u1E9Cy",null)))))),null)))))))),(new sc_Pair((new sc_Pair("\u1E9Cw",(new sc_Pair("\u1E9Clessp",(new sc_Pair((new sc_Pair("\u1E9Cremainder",(new sc_Pair("\u1E9Ca",(new sc_Pair("\u1E9Cb",null)))))),(new sc_Pair((new sc_Pair("\u1E9Cmember",(new sc_Pair("\u1E9Ca",(new sc_Pair((new sc_Pair("\u1E9Clength",(new sc_Pair("\u1E9Cb",null)))),null)))))),null)))))))),null)))))))))));
      BgL_nboyerzd2benchmarkzd2 = function() {
          var args = null;
          for (var sc_tmp = arguments.length - 1; sc_tmp >= 0; sc_tmp--) {
              args = sc_cons(arguments[sc_tmp], args);
          }
          var n;
          return ((n = ((args === null)?(0):(args.car))), (BgL_setupzd2boyerzd2()), (BgL_runzd2benchmarkzd2(("nboyer"+(sc_number2string(n))), (1), function() {
              return (BgL_testzd2boyerzd2(n));
          }, function(rewrites) {
              if ((sc_isNumber(rewrites)))
                  switch (n) {
                  case (0):
                      return (rewrites===(95024));
                      break;
                  case (1):
                      return (rewrites===(591777));
                      break;
                  case (2):
                      return (rewrites===(1813975));
                      break;
                  case (3):
                      return (rewrites===(5375678));
                      break;
                  case (4):
                      return (rewrites===(16445406));
                      break;
                  case (5):
                      return (rewrites===(51507739));
                      break;
                  default:
                      return true;
                      break;
                  }
              else
                  return false;
          })));
      };
      BgL_setupzd2boyerzd2 = function() {
          return true;
      };
      BgL_testzd2boyerzd2 = function() {
          return true;
      };
      translate_term_nboyer = function(term) {
          var lst;
          return (!(term instanceof sc_Pair)?term:(new sc_Pair((BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer((term.car))), ((lst = (term.cdr)), ((lst === null)?null:(new sc_Pair((translate_term_nboyer((lst.car))), (translate_args_nboyer((lst.cdr))))))))));
      };
      translate_args_nboyer = function(lst) {
          var sc_lst_5;
          var term;
          return ((lst === null)?null:(new sc_Pair(((term = (lst.car)), (!(term instanceof sc_Pair)?term:(new sc_Pair((BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer((term.car))), (translate_args_nboyer((term.cdr))))))), ((sc_lst_5 = (lst.cdr)), ((sc_lst_5 === null)?null:(new sc_Pair((translate_term_nboyer((sc_lst_5.car))), (translate_args_nboyer((sc_lst_5.cdr))))))))));
      };
      untranslate_term_nboyer = function(term) {
          var optrOpnd;
          var tail1131;
          var L1127;
          var falseHead1130;
          var symbol_record;
          if (!(term instanceof sc_Pair))
              return term;
          else
              {
                  (falseHead1130 = (new sc_Pair(null, null)));
                  (L1127 = (term.cdr));
                  (tail1131 = falseHead1130);
                  while (!(L1127 === null)) {
                      {
                          (tail1131.cdr = (new sc_Pair((untranslate_term_nboyer((L1127.car))), null)));
                          (tail1131 = (tail1131.cdr));
                          (L1127 = (L1127.cdr));
                      }
                  }
                  (optrOpnd = (falseHead1130.cdr));
                  return (new sc_Pair(((symbol_record = (term.car)), (symbol_record[(0)])), optrOpnd));
              }
      };
      BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer = function(sym) {
          var r;
          var x;
          return ((x = (sc_assq(sym, BgL_sc_za2symbolzd2recordszd2alistza2_2z00_nboyer))), ((x!== false)?(x.cdr):((r = [sym, null]), (BgL_sc_za2symbolzd2recordszd2alistza2_2z00_nboyer = (new sc_Pair((new sc_Pair(sym, r)), BgL_sc_za2symbolzd2recordszd2alistza2_2z00_nboyer))), r)));
      };
      (BgL_sc_za2symbolzd2recordszd2alistza2_2z00_nboyer = null);
      translate_alist_nboyer = function(alist) {
          var sc_alist_6;
          var term;
          return ((alist === null)?null:(new sc_Pair((new sc_Pair((alist.car.car), ((term = (alist.car.cdr)), (!(term instanceof sc_Pair)?term:(new sc_Pair((BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer((term.car))), (translate_args_nboyer((term.cdr))))))))), ((sc_alist_6 = (alist.cdr)), ((sc_alist_6 === null)?null:(new sc_Pair((new sc_Pair((sc_alist_6.car.car), (translate_term_nboyer((sc_alist_6.car.cdr))))), (translate_alist_nboyer((sc_alist_6.cdr))))))))));
      };
      apply_subst_nboyer = function(alist, term) {
          var lst;
          var temp_temp;
          return (!(term instanceof sc_Pair)?((temp_temp = (sc_assq(term, alist))), ((temp_temp!== false)?(temp_temp.cdr):term)):(new sc_Pair((term.car), ((lst = (term.cdr)), ((lst === null)?null:(new sc_Pair((apply_subst_nboyer(alist, (lst.car))), (apply_subst_lst_nboyer(alist, (lst.cdr))))))))));
      };
      apply_subst_lst_nboyer = function(alist, lst) {
          var sc_lst_7;
          return ((lst === null)?null:(new sc_Pair((apply_subst_nboyer(alist, (lst.car))), ((sc_lst_7 = (lst.cdr)), ((sc_lst_7 === null)?null:(new sc_Pair((apply_subst_nboyer(alist, (sc_lst_7.car))), (apply_subst_lst_nboyer(alist, (sc_lst_7.cdr))))))))));
      };
      tautologyp_nboyer = function(sc_x_11, true_lst, false_lst) {
          var tmp1125;
          var x;
          var tmp1126;
          var sc_x_8;
          var sc_tmp1125_9;
          var sc_tmp1126_10;
          var sc_x_11;
          var true_lst;
          var false_lst;
          while (true) {
              if ((((sc_tmp1126_10 = (is_term_equal_nboyer(sc_x_11, true_term_nboyer))), ((sc_tmp1126_10!== false)?sc_tmp1126_10:(is_term_member_nboyer(sc_x_11, true_lst))))!== false))
                  return true;
              else
                  if ((((sc_tmp1125_9 = (is_term_equal_nboyer(sc_x_11, false_term_nboyer))), ((sc_tmp1125_9!== false)?sc_tmp1125_9:(is_term_member_nboyer(sc_x_11, false_lst))))!== false))
                      return false;
                  else
                      if (!(sc_x_11 instanceof sc_Pair))
                          return false;
                      else
                          if (((sc_x_11.car)===if_constructor_nboyer))
                              if ((((sc_x_8 = (sc_x_11.cdr.car)), (tmp1126 = (is_term_equal_nboyer(sc_x_8, true_term_nboyer))), ((tmp1126!== false)?tmp1126:(is_term_member_nboyer(sc_x_8, true_lst))))!== false))
                                  (sc_x_11 = (sc_x_11.cdr.cdr.car));
                              else
                                  if ((((x = (sc_x_11.cdr.car)), (tmp1125 = (is_term_equal_nboyer(x, false_term_nboyer))), ((tmp1125!== false)?tmp1125:(is_term_member_nboyer(x, false_lst))))!== false))
                                      (sc_x_11 = (sc_x_11.cdr.cdr.cdr.car));
                                  else
                                      if (((tautologyp_nboyer((sc_x_11.cdr.cdr.car), (new sc_Pair((sc_x_11.cdr.car), true_lst)), false_lst))!== false))
                                          {
                                              (false_lst = (new sc_Pair((sc_x_11.cdr.car), false_lst)));
                                              (sc_x_11 = (sc_x_11.cdr.cdr.cdr.car));
                                          }
                                      else
                                          return false;
                          else
                              return false;
          }
      };
      (if_constructor_nboyer = "\u1E9C*");
      (rewrite_count_nboyer = (0));
      rewrite_nboyer = function(term) {
          var term2;
          var sc_term_12;
          var lst;
          var symbol_record;
          var sc_lst_13;
          {
              (++rewrite_count_nboyer);
              if (!(term instanceof sc_Pair))
                  return term;
              else
                  {
                      (sc_term_12 = (new sc_Pair((term.car), ((sc_lst_13 = (term.cdr)), ((sc_lst_13 === null)?null:(new sc_Pair((rewrite_nboyer((sc_lst_13.car))), (rewrite_args_nboyer((sc_lst_13.cdr))))))))));
                      (lst = ((symbol_record = (term.car)), (symbol_record[(1)])));
                      while (true) {
                          if ((lst === null))
                              return sc_term_12;
                          else
                              if ((((term2 = ((lst.car).cdr.car)), (unify_subst_nboyer = null), (one_way_unify1_nboyer(sc_term_12, term2)))!== false))
                                  return (rewrite_nboyer((apply_subst_nboyer(unify_subst_nboyer, ((lst.car).cdr.cdr.car)))));
                              else
                                  (lst = (lst.cdr));
                      }
                  }
          }
      };
      rewrite_args_nboyer = function(lst) {
          var sc_lst_14;
          return ((lst === null)?null:(new sc_Pair((rewrite_nboyer((lst.car))), ((sc_lst_14 = (lst.cdr)), ((sc_lst_14 === null)?null:(new sc_Pair((rewrite_nboyer((sc_lst_14.car))), (rewrite_args_nboyer((sc_lst_14.cdr))))))))));
      };
      (unify_subst_nboyer = "\u1E9C*");
      one_way_unify1_nboyer = function(term1, term2) {
          var lst1;
          var lst2;
          var temp_temp;
          if (!(term2 instanceof sc_Pair))
              {
                  (temp_temp = (sc_assq(term2, unify_subst_nboyer)));
                  if ((temp_temp!== false))
                      return (is_term_equal_nboyer(term1, (temp_temp.cdr)));
                  else
                      if ((sc_isNumber(term2)))
                          return (sc_isEqual(term1, term2));
                      else
                          {
                              (unify_subst_nboyer = (new sc_Pair((new sc_Pair(term2, term1)), unify_subst_nboyer)));
                              return true;
                          }
              }
          else
              if (!(term1 instanceof sc_Pair))
                  return false;
              else
                  if (((term1.car)===(term2.car)))
                      {
                          (lst1 = (term1.cdr));
                          (lst2 = (term2.cdr));
                          while (true) {
                              if ((lst1 === null))
                                  return (lst2 === null);
                              else
                                  if ((lst2 === null))
                                      return false;
                                  else
                                      if (((one_way_unify1_nboyer((lst1.car), (lst2.car)))!== false))
                                          {
                                              (lst1 = (lst1.cdr));
                                              (lst2 = (lst2.cdr));
                                          }
                                      else
                                          return false;
                          }
                      }
                  else
                      return false;
      };
      (false_term_nboyer = "\u1E9C*");
      (true_term_nboyer = "\u1E9C*");
      trans_of_implies1_nboyer = function(n) {
          var sc_n_15;
          return ((sc_isEqual(n, (1)))?(sc_list("\u1E9Cimplies", (0), (1))):(sc_list("\u1E9Cand", (sc_list("\u1E9Cimplies", (n-(1)), n)), ((sc_n_15 = (n-(1))), ((sc_isEqual(sc_n_15, (1)))?(sc_list("\u1E9Cimplies", (0), (1))):(sc_list("\u1E9Cand", (sc_list("\u1E9Cimplies", (sc_n_15-(1)), sc_n_15)), (trans_of_implies1_nboyer((sc_n_15-(1)))))))))));
      };
      is_term_equal_nboyer = function(x, y) {
          var lst1;
          var lst2;
          var r2;
          var r1;
          if ((x instanceof sc_Pair))
              if ((y instanceof sc_Pair))
                  if ((((r1 = (x.car)), (r2 = (y.car)), (r1===r2))!== false))
                      {
                          (lst1 = (x.cdr));
                          (lst2 = (y.cdr));
                          while (true) {
                              if ((lst1 === null))
                                  return (lst2 === null);
                              else
                                  if ((lst2 === null))
                                      return false;
                                  else
                                      if (((is_term_equal_nboyer((lst1.car), (lst2.car)))!== false))
                                          {
                                              (lst1 = (lst1.cdr));
                                              (lst2 = (lst2.cdr));
                                          }
                                      else
                                          return false;
                          }
                      }
                  else
                      return false;
              else
                  return false;
          else
              return (sc_isEqual(x, y));
      };
      is_term_member_nboyer = function(x, lst) {
          var x;
          var lst;
          while (true) {
              if ((lst === null))
                  return false;
              else
                  if (((is_term_equal_nboyer(x, (lst.car)))!== false))
                      return true;
                  else
                      (lst = (lst.cdr));
          }
      };
      BgL_setupzd2boyerzd2 = function() {
          var symbol_record;
          var value;
          var BgL_sc_symbolzd2record_16zd2;
          var sym;
          var sc_sym_17;
          var term;
          var lst;
          var sc_term_18;
          var sc_term_19;
          {
              (BgL_sc_za2symbolzd2recordszd2alistza2_2z00_nboyer = null);
              (if_constructor_nboyer = (BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer("\u1E9Cif")));
              (false_term_nboyer = ((sc_term_19 = (new sc_Pair("\u1E9Cf",null))), (!(sc_term_19 instanceof sc_Pair)?sc_term_19:(new sc_Pair((BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer((sc_term_19.car))), (translate_args_nboyer((sc_term_19.cdr))))))));
              (true_term_nboyer = ((sc_term_18 = (new sc_Pair("\u1E9Ct",null))), (!(sc_term_18 instanceof sc_Pair)?sc_term_18:(new sc_Pair((BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer((sc_term_18.car))), (translate_args_nboyer((sc_term_18.cdr))))))));
              (lst = sc_const_3_nboyer);
              while (!(lst === null)) {
                  {
                      (term = (lst.car));
                      if (((term instanceof sc_Pair)&&(((term.car)==="\u1E9Cequal")&&((term.cdr.car) instanceof sc_Pair))))
                          {
                              (sc_sym_17 = ((term.cdr.car).car));
                              (value = (new sc_Pair((!(term instanceof sc_Pair)?term:(new sc_Pair((BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer((term.car))), (translate_args_nboyer((term.cdr)))))), ((sym = ((term.cdr.car).car)), (BgL_sc_symbolzd2record_16zd2 = (BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer(sym))), (BgL_sc_symbolzd2record_16zd2[(1)])))));
                              (symbol_record = (BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer(sc_sym_17)));
                              (symbol_record[(1)] = value);
                          }
                      else
                          (sc_error("ADD-LEMMA did not like term:  ", term));
                      (lst = (lst.cdr));
                  }
              }
              return true;
          }
      };
      BgL_testzd2boyerzd2 = function(n) {
          var optrOpnd;
          var term;
          var sc_n_20;
          var answer;
          var sc_term_21;
          var sc_term_22;
          {
              (rewrite_count_nboyer = (0));
              (term = sc_const_4_nboyer);
              (sc_n_20 = n);
              while (!(sc_n_20=== 0)) {
                  {
                      (term = (sc_list("\u1E9Cor", term, (new sc_Pair("\u1E9Cf",null)))));
                      (--sc_n_20);
                  }
              }
              (sc_term_22 = term);
              if (!(sc_term_22 instanceof sc_Pair))
                  (optrOpnd = sc_term_22);
              else
                  (optrOpnd = (new sc_Pair((BgL_sc_symbolzd2ze3symbolzd2record_1ze3_nboyer((sc_term_22.car))), (translate_args_nboyer((sc_term_22.cdr))))));
              (sc_term_21 = (apply_subst_nboyer(((const_nboyer === null)?null:(new sc_Pair((new sc_Pair((const_nboyer.car.car), (translate_term_nboyer((const_nboyer.car.cdr))))), (translate_alist_nboyer((const_nboyer.cdr)))))), optrOpnd)));
              (answer = (tautologyp_nboyer((rewrite_nboyer(sc_term_21)), null, null)));
              (sc_write(rewrite_count_nboyer));
              (sc_display(" rewrites"));
              (sc_newline());
              if ((answer!== false))
                  return rewrite_count_nboyer;
              else
                  return false;
          }
      };
  }
  /* Exported Variables */
  var BgL_parsezd2ze3nbzd2treesze3;
  var BgL_earleyzd2benchmarkzd2;
  var BgL_parsezd2ze3parsedzf3zc2;
  var test;
  var BgL_parsezd2ze3treesz31;
  var BgL_makezd2parserzd2;
  /* End Exports */
  
  var const_earley;
  {
      (const_earley = (new sc_Pair((new sc_Pair("\u1E9Cs",(new sc_Pair((new sc_Pair("\u1E9Ca",null)),(new sc_Pair((new sc_Pair("\u1E9Cs",(new sc_Pair("\u1E9Cs",null)))),null)))))),null)));
      BgL_makezd2parserzd2 = function(grammar, lexer) {
          var i;
          var parser_descr;
          var def_loop;
          var nb_nts;
          var names;
          var steps;
          var predictors;
          var enders;
          var starters;
          var nts;
          var sc_names_1;
          var sc_steps_2;
          var sc_predictors_3;
          var sc_enders_4;
          var sc_starters_5;
          var nb_confs;
          var BgL_sc_defzd2loop_6zd2;
          var BgL_sc_nbzd2nts_7zd2;
          var sc_nts_8;
          var BgL_sc_defzd2loop_9zd2;
          var ind;
          {
              ind = function(nt, sc_nts_10) {
                  var i;
                  {
                      (i = ((sc_nts_10.length)-(1)));
                      while (true) {
                          if ((i>=(0)))
                              if ((sc_isEqual((sc_nts_10[i]), nt)))
                                  return i;
                              else
                                  (--i);
                          else
                              return false;
                      }
                  }
              };
              (sc_nts_8 = ((BgL_sc_defzd2loop_9zd2 = function(defs, sc_nts_11) {
                  var rule_loop;
                  var head;
                  var def;
                  return ((defs instanceof sc_Pair)?((def = (defs.car)), (head = (def.car)), (rule_loop = function(rules, sc_nts_12) {
                      var nt;
                      var l;
                      var sc_nts_13;
                      var rule;
                      if ((rules instanceof sc_Pair))
                          {
                              (rule = (rules.car));
                              (l = rule);
                              (sc_nts_13 = sc_nts_12);
                              while ((l instanceof sc_Pair)) {
                                  {
                                      (nt = (l.car));
                                      (l = (l.cdr));
                                      (sc_nts_13 = (((sc_member(nt, sc_nts_13))!== false)?sc_nts_13:(new sc_Pair(nt, sc_nts_13))));
                                  }
                              }
                              return (rule_loop((rules.cdr), sc_nts_13));
                          }
                      else
                          return (BgL_sc_defzd2loop_9zd2((defs.cdr), sc_nts_12));
                  }), (rule_loop((def.cdr), (((sc_member(head, sc_nts_11))!== false)?sc_nts_11:(new sc_Pair(head, sc_nts_11)))))):(sc_list2vector((sc_reverse(sc_nts_11)))));
              }), (BgL_sc_defzd2loop_9zd2(grammar, null))));
              (BgL_sc_nbzd2nts_7zd2 = (sc_nts_8.length));
              (nb_confs = (((BgL_sc_defzd2loop_6zd2 = function(defs, BgL_sc_nbzd2confs_14zd2) {
                  var rule_loop;
                  var def;
                  return ((defs instanceof sc_Pair)?((def = (defs.car)), (rule_loop = function(rules, BgL_sc_nbzd2confs_15zd2) {
                      var l;
                      var BgL_sc_nbzd2confs_16zd2;
                      var rule;
                      if ((rules instanceof sc_Pair))
                          {
                              (rule = (rules.car));
                              (l = rule);
                              (BgL_sc_nbzd2confs_16zd2 = BgL_sc_nbzd2confs_15zd2);
                              while ((l instanceof sc_Pair)) {
                                  {
                                      (l = (l.cdr));
                                      (++BgL_sc_nbzd2confs_16zd2);
                                  }
                              }
                              return (rule_loop((rules.cdr), (BgL_sc_nbzd2confs_16zd2+(1))));
                          }
                      else
                          return (BgL_sc_defzd2loop_6zd2((defs.cdr), BgL_sc_nbzd2confs_15zd2));
                  }), (rule_loop((def.cdr), BgL_sc_nbzd2confs_14zd2))):BgL_sc_nbzd2confs_14zd2);
              }), (BgL_sc_defzd2loop_6zd2(grammar, (0))))+BgL_sc_nbzd2nts_7zd2));
              (sc_starters_5 = (sc_makeVector(BgL_sc_nbzd2nts_7zd2, null)));
              (sc_enders_4 = (sc_makeVector(BgL_sc_nbzd2nts_7zd2, null)));
              (sc_predictors_3 = (sc_makeVector(BgL_sc_nbzd2nts_7zd2, null)));
              (sc_steps_2 = (sc_makeVector(nb_confs, false)));
              (sc_names_1 = (sc_makeVector(nb_confs, false)));
              (nts = sc_nts_8);
              (starters = sc_starters_5);
              (enders = sc_enders_4);
              (predictors = sc_predictors_3);
              (steps = sc_steps_2);
              (names = sc_names_1);
              (nb_nts = (sc_nts_8.length));
              (i = (nb_nts-(1)));
              while ((i>=(0))) {
                  {
                      (sc_steps_2[i] = (i-nb_nts));
                      (sc_names_1[i] = (sc_list((sc_nts_8[i]), (0))));
                      (sc_enders_4[i] = (sc_list(i)));
                      (--i);
                  }
              }
              def_loop = function(defs, conf) {
                  var rule_loop;
                  var head;
                  var def;
                  return ((defs instanceof sc_Pair)?((def = (defs.car)), (head = (def.car)), (rule_loop = function(rules, conf, rule_num) {
                      var i;
                      var sc_i_17;
                      var nt;
                      var l;
                      var sc_conf_18;
                      var sc_i_19;
                      var rule;
                      if ((rules instanceof sc_Pair))
                          {
                              (rule = (rules.car));
                              (names[conf] = (sc_list(head, rule_num)));
                              (sc_i_19 = (ind(head, nts)));
                              (starters[sc_i_19] = (new sc_Pair(conf, (starters[sc_i_19]))));
                              (l = rule);
                              (sc_conf_18 = conf);
                              while ((l instanceof sc_Pair)) {
                                  {
                                      (nt = (l.car));
                                      (steps[sc_conf_18] = (ind(nt, nts)));
                                      (sc_i_17 = (ind(nt, nts)));
                                      (predictors[sc_i_17] = (new sc_Pair(sc_conf_18, (predictors[sc_i_17]))));
                                      (l = (l.cdr));
                                      (++sc_conf_18);
                                  }
                              }
                              (steps[sc_conf_18] = ((ind(head, nts))-nb_nts));
                              (i = (ind(head, nts)));
                              (enders[i] = (new sc_Pair(sc_conf_18, (enders[i]))));
                              return (rule_loop((rules.cdr), (sc_conf_18+(1)), (rule_num+(1))));
                          }
                      else
                          return (def_loop((defs.cdr), conf));
                  }), (rule_loop((def.cdr), conf, (1)))):undefined);
              };
              (def_loop(grammar, (sc_nts_8.length)));
              (parser_descr = [lexer, sc_nts_8, sc_starters_5, sc_enders_4, sc_predictors_3, sc_steps_2, sc_names_1]);
              return function(input) {
                  var optrOpnd;
                  var sc_optrOpnd_20;
                  var sc_optrOpnd_21;
                  var sc_optrOpnd_22;
                  var loop1;
                  var BgL_sc_stateza2_23za2;
                  var toks;
                  var BgL_sc_nbzd2nts_24zd2;
                  var sc_steps_25;
                  var sc_enders_26;
                  var state_num;
                  var BgL_sc_statesza2_27za2;
                  var states;
                  var i;
                  var conf;
                  var l;
                  var tok_nts;
                  var sc_i_28;
                  var sc_i_29;
                  var l1;
                  var l2;
                  var tok;
                  var tail1129;
                  var L1125;
                  var goal_enders;
                  var BgL_sc_statesza2_30za2;
                  var BgL_sc_nbzd2nts_31zd2;
                  var BgL_sc_nbzd2confs_32zd2;
                  var nb_toks;
                  var goal_starters;
                  var sc_states_33;
                  var BgL_sc_nbzd2confs_34zd2;
                  var BgL_sc_nbzd2toks_35zd2;
                  var sc_toks_36;
                  var falseHead1128;
                  var sc_names_37;
                  var sc_steps_38;
                  var sc_predictors_39;
                  var sc_enders_40;
                  var sc_starters_41;
                  var sc_nts_42;
                  var lexer;
                  var sc_ind_43;
                  var make_states;
                  var BgL_sc_confzd2setzd2getza2_44za2;
                  var conf_set_merge_new_bang;
                  var conf_set_adjoin;
                  var BgL_sc_confzd2setzd2adjoinza2_45za2;
                  var BgL_sc_confzd2setzd2adjoinza2za2_46z00;
                  var conf_set_union;
                  var forw;
                  var is_parsed;
                  var deriv_trees;
                  var BgL_sc_derivzd2treesza2_47z70;
                  var nb_deriv_trees;
                  var BgL_sc_nbzd2derivzd2treesza2_48za2;
                  {
                      sc_ind_43 = function(nt, sc_nts_49) {
                          var i;
                          {
                              (i = ((sc_nts_49.length)-(1)));
                              while (true) {
                                  if ((i>=(0)))
                                      if ((sc_isEqual((sc_nts_49[i]), nt)))
                                          return i;
                                      else
                                          (--i);
                                  else
                                      return false;
                              }
                          }
                      };
                      make_states = function(BgL_sc_nbzd2toks_50zd2, BgL_sc_nbzd2confs_51zd2) {
                          var v;
                          var i;
                          var sc_states_52;
                          {
                              (sc_states_52 = (sc_makeVector((BgL_sc_nbzd2toks_50zd2+(1)), false)));
                              (i = BgL_sc_nbzd2toks_50zd2);
                              while ((i>=(0))) {
                                  {
                                      (v = (sc_makeVector((BgL_sc_nbzd2confs_51zd2+(1)), false)));
                                      (v[(0)] = (-1));
                                      (sc_states_52[i] = v);
                                      (--i);
                                  }
                              }
                              return sc_states_52;
                          }
                      };
                      BgL_sc_confzd2setzd2getza2_44za2 = function(state, BgL_sc_statezd2num_53zd2, sc_conf_54) {
                          var conf_set;
                          var BgL_sc_confzd2set_55zd2;
                          return ((BgL_sc_confzd2set_55zd2 = (state[(sc_conf_54+(1))])), ((BgL_sc_confzd2set_55zd2!== false)?BgL_sc_confzd2set_55zd2:((conf_set = (sc_makeVector((BgL_sc_statezd2num_53zd2+(6)), false))), (conf_set[(1)] = (-3)), (conf_set[(2)] = (-1)), (conf_set[(3)] = (-1)), (conf_set[(4)] = (-1)), (state[(sc_conf_54+(1))] = conf_set), conf_set)));
                      };
                      conf_set_merge_new_bang = function(conf_set) {
                          return ((conf_set[((conf_set[(1)])+(5))] = (conf_set[(4)])), (conf_set[(1)] = (conf_set[(3)])), (conf_set[(3)] = (-1)), (conf_set[(4)] = (-1)));
                      };
                      conf_set_adjoin = function(state, conf_set, sc_conf_56, i) {
                          var tail;
                          return ((tail = (conf_set[(3)])), (conf_set[(i+(5))] = (-1)), (conf_set[(tail+(5))] = i), (conf_set[(3)] = i), ((tail<(0))?((conf_set[(0)] = (state[(0)])), (state[(0)] = sc_conf_56)):undefined));
                      };
                      BgL_sc_confzd2setzd2adjoinza2_45za2 = function(sc_states_57, BgL_sc_statezd2num_58zd2, l, i) {
                          var conf_set;
                          var sc_conf_59;
                          var l1;
                          var state;
                          {
                              (state = (sc_states_57[BgL_sc_statezd2num_58zd2]));
                              (l1 = l);
                              while ((l1 instanceof sc_Pair)) {
                                  {
                                      (sc_conf_59 = (l1.car));
                                      (conf_set = (BgL_sc_confzd2setzd2getza2_44za2(state, BgL_sc_statezd2num_58zd2, sc_conf_59)));
                                      if (((conf_set[(i+(5))])=== false))
                                          {
                                              (conf_set_adjoin(state, conf_set, sc_conf_59, i));
                                              (l1 = (l1.cdr));
                                          }
                                      else
                                          (l1 = (l1.cdr));
                                  }
                              }
                              return undefined;
                          }
                      };
                      BgL_sc_confzd2setzd2adjoinza2za2_46z00 = function(sc_states_60, BgL_sc_statesza2_61za2, BgL_sc_statezd2num_62zd2, sc_conf_63, i) {
                          var BgL_sc_confzd2setza2_64z70;
                          var BgL_sc_stateza2_65za2;
                          var conf_set;
                          var state;
                          return ((state = (sc_states_60[BgL_sc_statezd2num_62zd2])), ((((conf_set = (state[(sc_conf_63+(1))])), ((conf_set!== false)?(conf_set[(i+(5))]):false))!== false)?((BgL_sc_stateza2_65za2 = (BgL_sc_statesza2_61za2[BgL_sc_statezd2num_62zd2])), (BgL_sc_confzd2setza2_64z70 = (BgL_sc_confzd2setzd2getza2_44za2(BgL_sc_stateza2_65za2, BgL_sc_statezd2num_62zd2, sc_conf_63))), (((BgL_sc_confzd2setza2_64z70[(i+(5))])=== false)?(conf_set_adjoin(BgL_sc_stateza2_65za2, BgL_sc_confzd2setza2_64z70, sc_conf_63, i)):undefined), true):false));
                      };
                      conf_set_union = function(state, conf_set, sc_conf_66, other_set) {
                          var i;
                          {
                              (i = (other_set[(2)]));
                              while ((i>=(0))) {
                                  if (((conf_set[(i+(5))])=== false))
                                      {
                                          (conf_set_adjoin(state, conf_set, sc_conf_66, i));
                                          (i = (other_set[(i+(5))]));
                                      }
                                  else
                                      (i = (other_set[(i+(5))]));
                              }
                              return undefined;
                          }
                      };
                      forw = function(sc_states_67, BgL_sc_statezd2num_68zd2, sc_starters_69, sc_enders_70, sc_predictors_71, sc_steps_72, sc_nts_73) {
                          var next_set;
                          var next;
                          var conf_set;
                          var ender;
                          var l;
                          var starter_set;
                          var starter;
                          var sc_l_74;
                          var sc_loop1_75;
                          var head;
                          var BgL_sc_confzd2set_76zd2;
                          var BgL_sc_statezd2num_77zd2;
                          var state;
                          var sc_states_78;
                          var preds;
                          var BgL_sc_confzd2set_79zd2;
                          var step;
                          var sc_conf_80;
                          var BgL_sc_nbzd2nts_81zd2;
                          var sc_state_82;
                          {
                              (sc_state_82 = (sc_states_67[BgL_sc_statezd2num_68zd2]));
                              (BgL_sc_nbzd2nts_81zd2 = (sc_nts_73.length));
                              while (true) {
                                  {
                                      (sc_conf_80 = (sc_state_82[(0)]));
                                      if ((sc_conf_80>=(0)))
                                          {
                                              (step = (sc_steps_72[sc_conf_80]));
                                              (BgL_sc_confzd2set_79zd2 = (sc_state_82[(sc_conf_80+(1))]));
                                              (head = (BgL_sc_confzd2set_79zd2[(4)]));
                                              (sc_state_82[(0)] = (BgL_sc_confzd2set_79zd2[(0)]));
                                              (conf_set_merge_new_bang(BgL_sc_confzd2set_79zd2));
                                              if ((step>=(0)))
                                                  {
                                                      (sc_l_74 = (sc_starters_69[step]));
                                                      while ((sc_l_74 instanceof sc_Pair)) {
                                                          {
                                                              (starter = (sc_l_74.car));
                                                              (starter_set = (BgL_sc_confzd2setzd2getza2_44za2(sc_state_82, BgL_sc_statezd2num_68zd2, starter)));
                                                              if (((starter_set[(BgL_sc_statezd2num_68zd2+(5))])=== false))
                                                                  {
                                                                      (conf_set_adjoin(sc_state_82, starter_set, starter, BgL_sc_statezd2num_68zd2));
                                                                      (sc_l_74 = (sc_l_74.cdr));
                                                                  }
                                                              else
                                                                  (sc_l_74 = (sc_l_74.cdr));
                                                          }
                                                      }
                                                      (l = (sc_enders_70[step]));
                                                      while ((l instanceof sc_Pair)) {
                                                          {
                                                              (ender = (l.car));
                                                              if ((((conf_set = (sc_state_82[(ender+(1))])), ((conf_set!== false)?(conf_set[(BgL_sc_statezd2num_68zd2+(5))]):false))!== false))
                                                                  {
                                                                      (next = (sc_conf_80+(1)));
                                                                      (next_set = (BgL_sc_confzd2setzd2getza2_44za2(sc_state_82, BgL_sc_statezd2num_68zd2, next)));
                                                                      (conf_set_union(sc_state_82, next_set, next, BgL_sc_confzd2set_79zd2));
                                                                      (l = (l.cdr));
                                                                  }
                                                              else
                                                                  (l = (l.cdr));
                                                          }
                                                      }
                                                  }
                                              else
                                                  {
                                                      (preds = (sc_predictors_71[(step+BgL_sc_nbzd2nts_81zd2)]));
                                                      (sc_states_78 = sc_states_67);
                                                      (state = sc_state_82);
                                                      (BgL_sc_statezd2num_77zd2 = BgL_sc_statezd2num_68zd2);
                                                      (BgL_sc_confzd2set_76zd2 = BgL_sc_confzd2set_79zd2);
                                                      sc_loop1_75 = function(l) {
                                                          var sc_state_83;
                                                          var BgL_sc_nextzd2set_84zd2;
                                                          var sc_next_85;
                                                          var pred_set;
                                                          var i;
                                                          var pred;
                                                          if ((l instanceof sc_Pair))
                                                              {
                                                                  (pred = (l.car));
                                                                  (i = head);
                                                                  while ((i>=(0))) {
                                                                      {
                                                                          (pred_set = ((sc_state_83 = (sc_states_78[i])), (sc_state_83[(pred+(1))])));
                                                                          if ((pred_set!== false))
                                                                              {
                                                                                  (sc_next_85 = (pred+(1)));
                                                                                  (BgL_sc_nextzd2set_84zd2 = (BgL_sc_confzd2setzd2getza2_44za2(state, BgL_sc_statezd2num_77zd2, sc_next_85)));
                                                                                  (conf_set_union(state, BgL_sc_nextzd2set_84zd2, sc_next_85, pred_set));
                                                                              }
                                                                          (i = (BgL_sc_confzd2set_76zd2[(i+(5))]));
                                                                      }
                                                                  }
                                                                  return (sc_loop1_75((l.cdr)));
                                                              }
                                                          else
                                                              return undefined;
                                                      };
                                                      (sc_loop1_75(preds));
                                                  }
                                          }
                                      else
                                          return undefined;
                                  }
                              }
                          }
                      };
                      is_parsed = function(nt, i, j, sc_nts_86, sc_enders_87, sc_states_88) {
                          var conf_set;
                          var state;
                          var sc_conf_89;
                          var l;
                          var BgL_sc_ntza2_90za2;
                          {
                              (BgL_sc_ntza2_90za2 = (sc_ind_43(nt, sc_nts_86)));
                              if ((BgL_sc_ntza2_90za2!== false))
                                  {
                                      (sc_nts_86.length);
                                      (l = (sc_enders_87[BgL_sc_ntza2_90za2]));
                                      while (true) {
                                          if ((l instanceof sc_Pair))
                                              {
                                                  (sc_conf_89 = (l.car));
                                                  if ((((state = (sc_states_88[j])), (conf_set = (state[(sc_conf_89+(1))])), ((conf_set!== false)?(conf_set[(i+(5))]):false))!== false))
                                                      return true;
                                                  else
                                                      (l = (l.cdr));
                                              }
                                          else
                                              return false;
                                      }
                                  }
                              else
                                  return false;
                          }
                      };
                      deriv_trees = function(sc_conf_91, i, j, sc_enders_92, sc_steps_93, sc_names_94, sc_toks_95, sc_states_96, BgL_sc_nbzd2nts_97zd2) {
                          var sc_loop1_98;
                          var prev;
                          var name;
                          return ((name = (sc_names_94[sc_conf_91])), ((name!== false)?((sc_conf_91<BgL_sc_nbzd2nts_97zd2)?(sc_list((sc_list(name, ((sc_toks_95[i]).car))))):(sc_list((sc_list(name))))):((prev = (sc_conf_91-(1))), (sc_loop1_98 = function(l1, l2) {
                              var loop2;
                              var ender_set;
                              var state;
                              var ender;
                              var l1;
                              var l2;
                              while (true) {
                                  if ((l1 instanceof sc_Pair))
                                      {
                                          (ender = (l1.car));
                                          (ender_set = ((state = (sc_states_96[j])), (state[(ender+(1))])));
                                          if ((ender_set!== false))
                                              {
                                                  loop2 = function(k, l2) {
                                                      var loop3;
                                                      var ender_trees;
                                                      var prev_trees;
                                                      var conf_set;
                                                      var sc_state_99;
                                                      var k;
                                                      var l2;
                                                      while (true) {
                                                          if ((k>=(0)))
                                                              if (((k>=i)&&(((sc_state_99 = (sc_states_96[k])), (conf_set = (sc_state_99[(prev+(1))])), ((conf_set!== false)?(conf_set[(i+(5))]):false))!== false)))
                                                                  {
                                                                      (prev_trees = (deriv_trees(prev, i, k, sc_enders_92, sc_steps_93, sc_names_94, sc_toks_95, sc_states_96, BgL_sc_nbzd2nts_97zd2)));
                                                                      (ender_trees = (deriv_trees(ender, k, j, sc_enders_92, sc_steps_93, sc_names_94, sc_toks_95, sc_states_96, BgL_sc_nbzd2nts_97zd2)));
                                                                      loop3 = function(l3, l2) {
                                                                          var l4;
                                                                          var sc_l2_100;
                                                                          var ender_tree;
                                                                          if ((l3 instanceof sc_Pair))
                                                                              {
                                                                                  (ender_tree = (sc_list((l3.car))));
                                                                                  (l4 = prev_trees);
                                                                                  (sc_l2_100 = l2);
                                                                                  while ((l4 instanceof sc_Pair)) {
                                                                                      {
                                                                                          (sc_l2_100 = (new sc_Pair((sc_append((l4.car), ender_tree)), sc_l2_100)));
                                                                                          (l4 = (l4.cdr));
                                                                                      }
                                                                                  }
                                                                                  return (loop3((l3.cdr), sc_l2_100));
                                                                              }
                                                                          else
                                                                              return (loop2((ender_set[(k+(5))]), l2));
                                                                      };
                                                                      return (loop3(ender_trees, l2));
                                                                  }
                                                              else
                                                                  (k = (ender_set[(k+(5))]));
                                                          else
                                                              return (sc_loop1_98((l1.cdr), l2));
                                                      }
                                                  };
                                                  return (loop2((ender_set[(2)]), l2));
                                              }
                                          else
                                              (l1 = (l1.cdr));
                                      }
                                  else
                                      return l2;
                              }
                          }), (sc_loop1_98((sc_enders_92[(sc_steps_93[prev])]), null)))));
                      };
                      BgL_sc_derivzd2treesza2_47z70 = function(nt, i, j, sc_nts_101, sc_enders_102, sc_steps_103, sc_names_104, sc_toks_105, sc_states_106) {
                          var conf_set;
                          var state;
                          var sc_conf_107;
                          var l;
                          var trees;
                          var BgL_sc_nbzd2nts_108zd2;
                          var BgL_sc_ntza2_109za2;
                          {
                              (BgL_sc_ntza2_109za2 = (sc_ind_43(nt, sc_nts_101)));
                              if ((BgL_sc_ntza2_109za2!== false))
                                  {
                                      (BgL_sc_nbzd2nts_108zd2 = (sc_nts_101.length));
                                      (l = (sc_enders_102[BgL_sc_ntza2_109za2]));
                                      (trees = null);
                                      while ((l instanceof sc_Pair)) {
                                          {
                                              (sc_conf_107 = (l.car));
                                              if ((((state = (sc_states_106[j])), (conf_set = (state[(sc_conf_107+(1))])), ((conf_set!== false)?(conf_set[(i+(5))]):false))!== false))
                                                  {
                                                      (l = (l.cdr));
                                                      (trees = (sc_append((deriv_trees(sc_conf_107, i, j, sc_enders_102, sc_steps_103, sc_names_104, sc_toks_105, sc_states_106, BgL_sc_nbzd2nts_108zd2)), trees)));
                                                  }
                                              else
                                                  (l = (l.cdr));
                                          }
                                      }
                                      return trees;
                                  }
                              else
                                  return false;
                          }
                      };
                      nb_deriv_trees = function(sc_conf_110, i, j, sc_enders_111, sc_steps_112, sc_toks_113, sc_states_114, BgL_sc_nbzd2nts_115zd2) {
                          var sc_loop1_116;
                          var tmp1124;
                          var prev;
                          return ((prev = (sc_conf_110-(1))), ((((tmp1124 = (sc_conf_110<BgL_sc_nbzd2nts_115zd2)), ((tmp1124!== false)?tmp1124:((sc_steps_112[prev])<(0))))!== false)?(1):((sc_loop1_116 = function(l, sc_n_118) {
                              var nb_ender_trees;
                              var nb_prev_trees;
                              var conf_set;
                              var state;
                              var k;
                              var n;
                              var ender_set;
                              var sc_state_117;
                              var ender;
                              var l;
                              var sc_n_118;
                              while (true) {
                                  if ((l instanceof sc_Pair))
                                      {
                                          (ender = (l.car));
                                          (ender_set = ((sc_state_117 = (sc_states_114[j])), (sc_state_117[(ender+(1))])));
                                          if ((ender_set!== false))
                                              {
                                                  (k = (ender_set[(2)]));
                                                  (n = sc_n_118);
                                                  while ((k>=(0))) {
                                                      if (((k>=i)&&(((state = (sc_states_114[k])), (conf_set = (state[(prev+(1))])), ((conf_set!== false)?(conf_set[(i+(5))]):false))!== false)))
                                                          {
                                                              (nb_prev_trees = (nb_deriv_trees(prev, i, k, sc_enders_111, sc_steps_112, sc_toks_113, sc_states_114, BgL_sc_nbzd2nts_115zd2)));
                                                              (nb_ender_trees = (nb_deriv_trees(ender, k, j, sc_enders_111, sc_steps_112, sc_toks_113, sc_states_114, BgL_sc_nbzd2nts_115zd2)));
                                                              (k = (ender_set[(k+(5))]));
                                                              (n +=(nb_prev_trees*nb_ender_trees));
                                                          }
                                                      else
                                                          (k = (ender_set[(k+(5))]));
                                                  }
                                                  return (sc_loop1_116((l.cdr), n));
                                              }
                                          else
                                              (l = (l.cdr));
                                      }
                                  else
                                      return sc_n_118;
                              }
                          }), (sc_loop1_116((sc_enders_111[(sc_steps_112[prev])]), (0))))));
                      };
                      BgL_sc_nbzd2derivzd2treesza2_48za2 = function(nt, i, j, sc_nts_119, sc_enders_120, sc_steps_121, sc_toks_122, sc_states_123) {
                          var conf_set;
                          var state;
                          var sc_conf_124;
                          var l;
                          var nb_trees;
                          var BgL_sc_nbzd2nts_125zd2;
                          var BgL_sc_ntza2_126za2;
                          {
                              (BgL_sc_ntza2_126za2 = (sc_ind_43(nt, sc_nts_119)));
                              if ((BgL_sc_ntza2_126za2!== false))
                                  {
                                      (BgL_sc_nbzd2nts_125zd2 = (sc_nts_119.length));
                                      (l = (sc_enders_120[BgL_sc_ntza2_126za2]));
                                      (nb_trees = (0));
                                      while ((l instanceof sc_Pair)) {
                                          {
                                              (sc_conf_124 = (l.car));
                                              if ((((state = (sc_states_123[j])), (conf_set = (state[(sc_conf_124+(1))])), ((conf_set!== false)?(conf_set[(i+(5))]):false))!== false))
                                                  {
                                                      (l = (l.cdr));
                                                      (nb_trees = ((nb_deriv_trees(sc_conf_124, i, j, sc_enders_120, sc_steps_121, sc_toks_122, sc_states_123, BgL_sc_nbzd2nts_125zd2))+nb_trees));
                                                  }
                                              else
                                                  (l = (l.cdr));
                                          }
                                      }
                                      return nb_trees;
                                  }
                              else
                                  return false;
                          }
                      };
                      (lexer = (parser_descr[(0)]));
                      (sc_nts_42 = (parser_descr[(1)]));
                      (sc_starters_41 = (parser_descr[(2)]));
                      (sc_enders_40 = (parser_descr[(3)]));
                      (sc_predictors_39 = (parser_descr[(4)]));
                      (sc_steps_38 = (parser_descr[(5)]));
                      (sc_names_37 = (parser_descr[(6)]));
                      (falseHead1128 = (new sc_Pair(null, null)));
                      (L1125 = (lexer(input)));
                      (tail1129 = falseHead1128);
                      while (!(L1125 === null)) {
                          {
                              (tok = (L1125.car));
                              (l1 = (tok.cdr));
                              (l2 = null);
                              while ((l1 instanceof sc_Pair)) {
                                  {
                                      (sc_i_29 = (sc_ind_43((l1.car), sc_nts_42)));
                                      if ((sc_i_29!== false))
                                          {
                                              (l1 = (l1.cdr));
                                              (l2 = (new sc_Pair(sc_i_29, l2)));
                                          }
                                      else
                                          (l1 = (l1.cdr));
                                  }
                              }
                              (sc_optrOpnd_22 = (new sc_Pair((tok.car), (sc_reverse(l2)))));
                              (sc_optrOpnd_21 = (new sc_Pair(sc_optrOpnd_22, null)));
                              (tail1129.cdr = sc_optrOpnd_21);
                              (tail1129 = (tail1129.cdr));
                              (L1125 = (L1125.cdr));
                          }
                      }
                      (sc_optrOpnd_20 = (falseHead1128.cdr));
                      (sc_toks_36 = (sc_list2vector(sc_optrOpnd_20)));
                      (BgL_sc_nbzd2toks_35zd2 = (sc_toks_36.length));
                      (BgL_sc_nbzd2confs_34zd2 = (sc_steps_38.length));
                      (sc_states_33 = (make_states(BgL_sc_nbzd2toks_35zd2, BgL_sc_nbzd2confs_34zd2)));
                      (goal_starters = (sc_starters_41[(0)]));
                      (BgL_sc_confzd2setzd2adjoinza2_45za2(sc_states_33, (0), goal_starters, (0)));
                      (forw(sc_states_33, (0), sc_starters_41, sc_enders_40, sc_predictors_39, sc_steps_38, sc_nts_42));
                      (sc_i_28 = (0));
                      while ((sc_i_28<BgL_sc_nbzd2toks_35zd2)) {
                          {
                              (tok_nts = ((sc_toks_36[sc_i_28]).cdr));
                              (BgL_sc_confzd2setzd2adjoinza2_45za2(sc_states_33, (sc_i_28+(1)), tok_nts, sc_i_28));
                              (forw(sc_states_33, (sc_i_28+(1)), sc_starters_41, sc_enders_40, sc_predictors_39, sc_steps_38, sc_nts_42));
                              (++sc_i_28);
                          }
                      }
                      (nb_toks = (sc_toks_36.length));
                      (BgL_sc_nbzd2confs_32zd2 = (sc_steps_38.length));
                      (BgL_sc_nbzd2nts_31zd2 = (sc_nts_42.length));
                      (BgL_sc_statesza2_30za2 = (make_states(nb_toks, BgL_sc_nbzd2confs_32zd2)));
                      (goal_enders = (sc_enders_40[(0)]));
                      (l = goal_enders);
                      while ((l instanceof sc_Pair)) {
                          {
                              (conf = (l.car));
                              (BgL_sc_confzd2setzd2adjoinza2za2_46z00(sc_states_33, BgL_sc_statesza2_30za2, nb_toks, conf, (0)));
                              (l = (l.cdr));
                          }
                      }
                      (i = nb_toks);
                      while ((i>=(0))) {
                          {
                              (states = sc_states_33);
                              (BgL_sc_statesza2_27za2 = BgL_sc_statesza2_30za2);
                              (state_num = i);
                              (sc_enders_26 = sc_enders_40);
                              (sc_steps_25 = sc_steps_38);
                              (BgL_sc_nbzd2nts_24zd2 = BgL_sc_nbzd2nts_31zd2);
                              (toks = sc_toks_36);
                              (BgL_sc_stateza2_23za2 = (BgL_sc_statesza2_30za2[i]));
                              loop1 = function() {
                                  var sc_loop1_127;
                                  var prev;
                                  var BgL_sc_statesza2_128za2;
                                  var sc_states_129;
                                  var j;
                                  var i;
                                  var sc_i_130;
                                  var head;
                                  var conf_set;
                                  var sc_conf_131;
                                  {
                                      (sc_conf_131 = (BgL_sc_stateza2_23za2[(0)]));
                                      if ((sc_conf_131>=(0)))
                                          {
                                              (conf_set = (BgL_sc_stateza2_23za2[(sc_conf_131+(1))]));
                                              (head = (conf_set[(4)]));
                                              (BgL_sc_stateza2_23za2[(0)] = (conf_set[(0)]));
                                              (conf_set_merge_new_bang(conf_set));
                                              (sc_i_130 = head);
                                              while ((sc_i_130>=(0))) {
                                                  {
                                                      (i = sc_i_130);
                                                      (j = state_num);
                                                      (sc_states_129 = states);
                                                      (BgL_sc_statesza2_128za2 = BgL_sc_statesza2_27za2);
                                                      (prev = (sc_conf_131-(1)));
                                                      if (((sc_conf_131>=BgL_sc_nbzd2nts_24zd2)&&((sc_steps_25[prev])>=(0))))
                                                          {
                                                              sc_loop1_127 = function(l) {
                                                                  var k;
                                                                  var ender_set;
                                                                  var state;
                                                                  var ender;
                                                                  var l;
                                                                  while (true) {
                                                                      if ((l instanceof sc_Pair))
                                                                          {
                                                                              (ender = (l.car));
                                                                              (ender_set = ((state = (sc_states_129[j])), (state[(ender+(1))])));
                                                                              if ((ender_set!== false))
                                                                                  {
                                                                                      (k = (ender_set[(2)]));
                                                                                      while ((k>=(0))) {
                                                                                          {
                                                                                              if ((k>=i))
                                                                                                  if (((BgL_sc_confzd2setzd2adjoinza2za2_46z00(sc_states_129, BgL_sc_statesza2_128za2, k, prev, i))!== false))
                                                                                                      (BgL_sc_confzd2setzd2adjoinza2za2_46z00(sc_states_129, BgL_sc_statesza2_128za2, j, ender, k));
                                                                                              (k = (ender_set[(k+(5))]));
                                                                                          }
                                                                                      }
                                                                                      return (sc_loop1_127((l.cdr)));
                                                                                  }
                                                                              else
                                                                                  (l = (l.cdr));
                                                                          }
                                                                      else
                                                                          return undefined;
                                                                  }
                                                              };
                                                              (sc_loop1_127((sc_enders_26[(sc_steps_25[prev])])));
                                                          }
                                                      (sc_i_130 = (conf_set[(sc_i_130+(5))]));
                                                  }
                                              }
                                              return (loop1());
                                          }
                                      else
                                          return undefined;
                                  }
                              };
                              (loop1());
                              (--i);
                          }
                      }
                      (optrOpnd = BgL_sc_statesza2_30za2);
                      return [sc_nts_42, sc_starters_41, sc_enders_40, sc_predictors_39, sc_steps_38, sc_names_37, sc_toks_36, optrOpnd, is_parsed, BgL_sc_derivzd2treesza2_47z70, BgL_sc_nbzd2derivzd2treesza2_48za2];
                  }
              };
          }
      };
      BgL_parsezd2ze3parsedzf3zc2 = function(parse, nt, i, j) {
          var is_parsed;
          var states;
          var enders;
          var nts;
          return ((nts = (parse[(0)])), (enders = (parse[(2)])), (states = (parse[(7)])), (is_parsed = (parse[(8)])), (is_parsed(nt, i, j, nts, enders, states)));
      };
      BgL_parsezd2ze3treesz31 = function(parse, nt, i, j) {
          var BgL_sc_derivzd2treesza2_132z70;
          var states;
          var toks;
          var names;
          var steps;
          var enders;
          var nts;
          return ((nts = (parse[(0)])), (enders = (parse[(2)])), (steps = (parse[(4)])), (names = (parse[(5)])), (toks = (parse[(6)])), (states = (parse[(7)])), (BgL_sc_derivzd2treesza2_132z70 = (parse[(9)])), (BgL_sc_derivzd2treesza2_132z70(nt, i, j, nts, enders, steps, names, toks, states)));
      };
      BgL_parsezd2ze3nbzd2treesze3 = function(parse, nt, i, j) {
          var BgL_sc_nbzd2derivzd2treesza2_133za2;
          var states;
          var toks;
          var steps;
          var enders;
          var nts;
          return ((nts = (parse[(0)])), (enders = (parse[(2)])), (steps = (parse[(4)])), (toks = (parse[(6)])), (states = (parse[(7)])), (BgL_sc_nbzd2derivzd2treesza2_133za2 = (parse[(10)])), (BgL_sc_nbzd2derivzd2treesza2_133za2(nt, i, j, nts, enders, steps, toks, states)));
      };
      test = function(k) {
          var x;
          var p;
          return ((p = (BgL_makezd2parserzd2(const_earley, function(l) {
              var sc_x_134;
              var tail1134;
              var L1130;
              var falseHead1133;
              {
                  (falseHead1133 = (new sc_Pair(null, null)));
                  (tail1134 = falseHead1133);
                  (L1130 = l);
                  while (!(L1130 === null)) {
                      {
                          (tail1134.cdr = (new sc_Pair(((sc_x_134 = (L1130.car)), (sc_list(sc_x_134, sc_x_134))), null)));
                          (tail1134 = (tail1134.cdr));
                          (L1130 = (L1130.cdr));
                      }
                  }
                  return (falseHead1133.cdr);
              }
          }))), (x = (p((sc_vector2list((sc_makeVector(k, "\u1E9Ca"))))))), (sc_length((BgL_parsezd2ze3treesz31(x, "\u1E9Cs", (0), k)))));
      };
      BgL_earleyzd2benchmarkzd2 = function() {
          var args = null;
          for (var sc_tmp = arguments.length - 1; sc_tmp >= 0; sc_tmp--) {
              args = sc_cons(arguments[sc_tmp], args);
          }
          var k;
          return ((k = ((args === null)?(7):(args.car))), (BgL_runzd2benchmarkzd2("earley", (1), function() {
              return (test(k));
          }, function(result) {
              return ((sc_display(result)), (sc_newline()), result == 132);
          })));
      };
  }
  
  
  /************* END OF GENERATED CODE *************/
  // Invoke this function to run a benchmark.
  // The first argument is a string identifying the benchmark.
  // The second argument is the number of times to run the benchmark.
  // The third argument is a function that runs the benchmark.
  // The fourth argument is a unary function that warns if the result
  // returned by the benchmark is incorrect.
  //
  // Example:
  // RunBenchmark("new Array()",
  //              1,
  //              function () { new Array(1000000); }
  //              function (v) {
  //                return (v instanceof Array) && (v.length == 1000000);
  //              });
  
  SC_DEFAULT_OUT = new sc_GenericOutputPort(function(s) {});
  SC_ERROR_OUT = SC_DEFAULT_OUT;
  
  function RunBenchmark(name, count, run, warn) {
    for (var n = 0; n < count; ++n) {
      result = run();
      if (!warn(result)) {
        throw new Error("Earley or Boyer did incorrect number of rewrites");
      }
    }
  }
  
  var BgL_runzd2benchmarkzd2 = RunBenchmark;
  
  class Benchmark {
      runIteration() {
          BgL_earleyzd2benchmarkzd2();
          BgL_nboyerzd2benchmarkzd2();
      }
  }
  