src/bigi/lib/bigi.js
function bnShiftLeft(n) {
  var r = new BigInteger()
  if (n < 0) this.rShiftTo(-n, r)
  else this.lShiftTo(n, r)
  return r
}
function bnShiftLeft(n) {
  var r = new BigInteger()
  if (n < 0) this.rShiftTo(-n, r)
  else this.lShiftTo(n, r)
  return r
}
function bnShiftLeft ( n ) { var r = new BigInteger ( ) if ( n < 0 ) this . rShiftTo ( - n , r ) else this . lShiftTo ( n , r ) return r }
(public) this << n
( public ) this << n