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'use strict';
var clear = require('es5-ext/array/#/clear')
, eIndexOf = require('es5-ext/array/#/e-index-of')
, setPrototypeOf = require('es5-ext/object/set-prototype-of')
, callable = require('es5-ext/object/valid-callable')
, d = require('d')
, ee = require('event-emitter')
, Symbol = require('es6-symbol')
, iterator = require('es6-iterator/valid-iterable')
, forOf = require('es6-iterator/for-of')
, Iterator = require('./lib/iterator')
, isNative = require('./is-native-implemented')
, call = Function.prototype.call
, defineProperty = Object.defineProperty, getPrototypeOf = Object.getPrototypeOf
, SetPoly, getValues, NativeSet;
if (isNative) NativeSet = Set;
module.exports = SetPoly = function Set(/*iterable*/) {
var iterable = arguments[0], self;
if (!(this instanceof SetPoly)) throw new TypeError('Constructor requires \'new\'');
if (isNative && setPrototypeOf) self = setPrototypeOf(new NativeSet(), getPrototypeOf(this));
else self = this;
if (iterable != null) iterator(iterable);
defineProperty(self, '__setData__', d('c', []));
if (!iterable) return self;
forOf(iterable, function (value) {
if (eIndexOf.call(this, value) !== -1) return;
this.push(value);
}, self.__setData__);
return self;
};
if (isNative) {
if (setPrototypeOf) setPrototypeOf(SetPoly, NativeSet);
SetPoly.prototype = Object.create(NativeSet.prototype, { constructor: d(SetPoly) });
}
ee(Object.defineProperties(SetPoly.prototype, {
add: d(function (value) {
if (this.has(value)) return this;
this.emit('_add', this.__setData__.push(value) - 1, value);
return this;
}),
clear: d(function () {
if (!this.__setData__.length) return;
clear.call(this.__setData__);
this.emit('_clear');
}),
delete: d(function (value) {
var index = eIndexOf.call(this.__setData__, value);
if (index === -1) return false;
this.__setData__.splice(index, 1);
this.emit('_delete', index, value);
return true;
}),
entries: d(function () { return new Iterator(this, 'key+value'); }),
forEach: d(function (cb/*, thisArg*/) {
var thisArg = arguments[1], iterator, result, value;
callable(cb);
iterator = this.values();
result = iterator._next();
while (result !== undefined) {
value = iterator._resolve(result);
call.call(cb, thisArg, value, value, this);
result = iterator._next();
}
}),
has: d(function (value) {
return (eIndexOf.call(this.__setData__, value) !== -1);
}),
keys: d(getValues = function () { return this.values(); }),
size: d.gs(function () { return this.__setData__.length; }),
values: d(function () { return new Iterator(this); }),
toString: d(function () { return '[object Set]'; })
}));
defineProperty(SetPoly.prototype, Symbol.iterator, d(getValues));
defineProperty(SetPoly.prototype, Symbol.toStringTag, d('c', 'Set'));
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