梁美英 / programming · Files

'use strict';
var path      = require('./_path')
  , invoke    = require('./_invoke')
  , aFunction = require('./_a-function');
module.exports = function(/* ...pargs */){
  var fn     = aFunction(this)
    , length = arguments.length
    , pargs  = Array(length)
    , i      = 0
    , _      = path._
    , holder = false;
  while(length > i)if((pargs[i] = arguments[i++]) === _)holder = true;
  return function(/* ...args */){
    var that = this
      , aLen = arguments.length
      , j = 0, k = 0, args;
    if(!holder && !aLen)return invoke(fn, pargs, that);
    args = pargs.slice();
    if(holder)for(;length > j; j++)if(args[j] === _)args[j] = arguments[k++];
    while(aLen > k)args.push(arguments[k++]);
    return invoke(fn, args, that);
  };
};