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'use strict';
var redefineAll = require('./_redefine-all')
, getWeak = require('./_meta').getWeak
, anObject = require('./_an-object')
, isObject = require('./_is-object')
, anInstance = require('./_an-instance')
, forOf = require('./_for-of')
, createArrayMethod = require('./_array-methods')
, $has = require('./_has')
, arrayFind = createArrayMethod(5)
, arrayFindIndex = createArrayMethod(6)
, id = 0;
// fallback for uncaught frozen keys
var uncaughtFrozenStore = function(that){
return that._l || (that._l = new UncaughtFrozenStore);
};
var UncaughtFrozenStore = function(){
this.a = [];
};
var findUncaughtFrozen = function(store, key){
return arrayFind(store.a, function(it){
return it[0] === key;
});
};
UncaughtFrozenStore.prototype = {
get: function(key){
var entry = findUncaughtFrozen(this, key);
if(entry)return entry[1];
},
has: function(key){
return !!findUncaughtFrozen(this, key);
},
set: function(key, value){
var entry = findUncaughtFrozen(this, key);
if(entry)entry[1] = value;
else this.a.push([key, value]);
},
'delete': function(key){
var index = arrayFindIndex(this.a, function(it){
return it[0] === key;
});
if(~index)this.a.splice(index, 1);
return !!~index;
}
};
module.exports = {
getConstructor: function(wrapper, NAME, IS_MAP, ADDER){
var C = wrapper(function(that, iterable){
anInstance(that, C, NAME, '_i');
that._i = id++; // collection id
that._l = undefined; // leak store for uncaught frozen objects
if(iterable != undefined)forOf(iterable, IS_MAP, that[ADDER], that);
});
redefineAll(C.prototype, {
// 23.3.3.2 WeakMap.prototype.delete(key)
// 23.4.3.3 WeakSet.prototype.delete(value)
'delete': function(key){
if(!isObject(key))return false;
var data = getWeak(key);
if(data === true)return uncaughtFrozenStore(this)['delete'](key);
return data && $has(data, this._i) && delete data[this._i];
},
// 23.3.3.4 WeakMap.prototype.has(key)
// 23.4.3.4 WeakSet.prototype.has(value)
has: function has(key){
if(!isObject(key))return false;
var data = getWeak(key);
if(data === true)return uncaughtFrozenStore(this).has(key);
return data && $has(data, this._i);
}
});
return C;
},
def: function(that, key, value){
var data = getWeak(anObject(key), true);
if(data === true)uncaughtFrozenStore(that).set(key, value);
else data[that._i] = value;
return that;
},
ufstore: uncaughtFrozenStore
};
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