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[yaffs-website] / node_modules / core-js / modules / _collection-strong.js

diff --git a/node_modules/core-js/modules/_collection-strong.js b/node_modules/core-js/modules/_collection-strong.js
new file mode 100644 (file)
index 0000000..55e4b61
--- /dev/null
+++ b/node_modules/core-js/modules/_collection-strong.js
@@ -0,0 +1,142 @@
+'use strict';
+var dP          = require('./_object-dp').f
+  , create      = require('./_object-create')
+  , redefineAll = require('./_redefine-all')
+  , ctx         = require('./_ctx')
+  , anInstance  = require('./_an-instance')
+  , defined     = require('./_defined')
+  , forOf       = require('./_for-of')
+  , $iterDefine = require('./_iter-define')
+  , step        = require('./_iter-step')
+  , setSpecies  = require('./_set-species')
+  , DESCRIPTORS = require('./_descriptors')
+  , fastKey     = require('./_meta').fastKey
+  , SIZE        = DESCRIPTORS ? '_s' : 'size';
+
+var getEntry = function(that, key){
+  // fast case
+  var index = fastKey(key), entry;
+  if(index !== 'F')return that._i[index];
+  // frozen object case
+  for(entry = that._f; entry; entry = entry.n){
+    if(entry.k == key)return entry;
+  }
+};
+
+module.exports = {
+  getConstructor: function(wrapper, NAME, IS_MAP, ADDER){
+    var C = wrapper(function(that, iterable){
+      anInstance(that, C, NAME, '_i');
+      that._i = create(null); // index
+      that._f = undefined;    // first entry
+      that._l = undefined;    // last entry
+      that[SIZE] = 0;         // size
+      if(iterable != undefined)forOf(iterable, IS_MAP, that[ADDER], that);
+    });
+    redefineAll(C.prototype, {
+      // 23.1.3.1 Map.prototype.clear()
+      // 23.2.3.2 Set.prototype.clear()
+      clear: function clear(){
+        for(var that = this, data = that._i, entry = that._f; entry; entry = entry.n){
+          entry.r = true;
+          if(entry.p)entry.p = entry.p.n = undefined;
+          delete data[entry.i];
+        }
+        that._f = that._l = undefined;
+        that[SIZE] = 0;
+      },
+      // 23.1.3.3 Map.prototype.delete(key)
+      // 23.2.3.4 Set.prototype.delete(value)
+      'delete': function(key){
+        var that  = this
+          , entry = getEntry(that, key);
+        if(entry){
+          var next = entry.n
+            , prev = entry.p;
+          delete that._i[entry.i];
+          entry.r = true;
+          if(prev)prev.n = next;
+          if(next)next.p = prev;
+          if(that._f == entry)that._f = next;
+          if(that._l == entry)that._l = prev;
+          that[SIZE]--;
+        } return !!entry;
+      },
+      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
+      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
+      forEach: function forEach(callbackfn /*, that = undefined */){
+        anInstance(this, C, 'forEach');
+        var f = ctx(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3)
+          , entry;
+        while(entry = entry ? entry.n : this._f){
+          f(entry.v, entry.k, this);
+          // revert to the last existing entry
+          while(entry && entry.r)entry = entry.p;
+        }
+      },
+      // 23.1.3.7 Map.prototype.has(key)
+      // 23.2.3.7 Set.prototype.has(value)
+      has: function has(key){
+        return !!getEntry(this, key);
+      }
+    });
+    if(DESCRIPTORS)dP(C.prototype, 'size', {
+      get: function(){
+        return defined(this[SIZE]);
+      }
+    });
+    return C;
+  },
+  def: function(that, key, value){
+    var entry = getEntry(that, key)
+      , prev, index;
+    // change existing entry
+    if(entry){
+      entry.v = value;
+    // create new entry
+    } else {
+      that._l = entry = {
+        i: index = fastKey(key, true), // <- index
+        k: key,                        // <- key
+        v: value,                      // <- value
+        p: prev = that._l,             // <- previous entry
+        n: undefined,                  // <- next entry
+        r: false                       // <- removed
+      };
+      if(!that._f)that._f = entry;
+      if(prev)prev.n = entry;
+      that[SIZE]++;
+      // add to index
+      if(index !== 'F')that._i[index] = entry;
+    } return that;
+  },
+  getEntry: getEntry,
+  setStrong: function(C, NAME, IS_MAP){
+    // add .keys, .values, .entries, [@@iterator]
+    // 23.1.3.4, 23.1.3.8, 23.1.3.11, 23.1.3.12, 23.2.3.5, 23.2.3.8, 23.2.3.10, 23.2.3.11
+    $iterDefine(C, NAME, function(iterated, kind){
+      this._t = iterated;  // target
+      this._k = kind;      // kind
+      this._l = undefined; // previous
+    }, function(){
+      var that  = this
+        , kind  = that._k
+        , entry = that._l;
+      // revert to the last existing entry
+      while(entry && entry.r)entry = entry.p;
+      // get next entry
+      if(!that._t || !(that._l = entry = entry ? entry.n : that._t._f)){
+        // or finish the iteration
+        that._t = undefined;
+        return step(1);
+      }
+      // return step by kind
+      if(kind == 'keys'  )return step(0, entry.k);
+      if(kind == 'values')return step(0, entry.v);
+      return step(0, [entry.k, entry.v]);
+    }, IS_MAP ? 'entries' : 'values' , !IS_MAP, true);
+
+    // add [@@species], 23.1.2.2, 23.2.2.2
+    setSpecies(NAME);
+  }
+};
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