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var global = require('./_global')
, core = require('./_core')
, hide = require('./_hide')
, redefine = require('./_redefine')
, ctx = require('./_ctx')
, PROTOTYPE = 'prototype';
var $export = function(type, name, source){
var IS_FORCED = type & $export.F
, IS_GLOBAL = type & $export.G
, IS_STATIC = type & $export.S
, IS_PROTO = type & $export.P
, IS_BIND = type & $export.B
, target = IS_GLOBAL ? global : IS_STATIC ? global[name] || (global[name] = {}) : (global[name] || {})[PROTOTYPE]
, exports = IS_GLOBAL ? core : core[name] || (core[name] = {})
, expProto = exports[PROTOTYPE] || (exports[PROTOTYPE] = {})
, key, own, out, exp;
if(IS_GLOBAL)source = name;
for(key in source){
// contains in native
own = !IS_FORCED && target && target[key] !== undefined;
// export native or passed
out = (own ? target : source)[key];
// bind timers to global for call from export context
exp = IS_BIND && own ? ctx(out, global) : IS_PROTO && typeof out == 'function' ? ctx(Function.call, out) : out;
// extend global
if(target)redefine(target, key, out, type & $export.U);
// export
if(exports[key] != out)hide(exports, key, exp);
if(IS_PROTO && expProto[key] != out)expProto[key] = out;
}
};
global.core = core;
// type bitmap
$export.F = 1; // forced
$export.G = 2; // global
$export.S = 4; // static
$export.P = 8; // proto
$export.B = 16; // bind
$export.W = 32; // wrap
$export.U = 64; // safe
$export.R = 128; // real proto method for `library`
module.exports = $export;
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