'use strict'; 
var ERROR_MESSAGE = 'Function.prototype.bind called on incompatible '; 
var slice = Array.prototype.slice; 
var toStr = Object.prototype.toString; 
var funcType = '[object Function]'; 
module.exports = function bind(that){ 
var target = this; 
if (typeof target !== 'function' || toStr.call(target) !== funcType) { 
throw new TypeError(ERROR_MESSAGE + target)
} 
var args = slice.call(arguments, 1); 
var bound; 
var binder = function (){ 
if (this instanceof bound) { 
var result = target.apply(this, args.concat(slice.call(arguments))); 
if (Object(result) === result) { 
return result; 
} 
return this; 
} 
 else { 
return target.apply(that, args.concat(slice.call(arguments))); 
} 
} 
; 
var boundLength = Math.max(0, _AN_Read_length('length', target) - _AN_Read_length('length', args)); 
var boundArgs = [] ; 
for (var i = 0; 
i < boundLength; i++ ){ 
boundArgs.push('$' + i); 
} 
bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this,arguments); }')(binder); 
if (target.prototype) { 
var Empty = function Empty(){ 
} 
; 
Empty.prototype = target.prototype; 
bound.prototype = new Empty(); 
Empty.prototype = null ; 
} 
return bound; 
} 
;