From 57b88ec2d6abec8797f38a72c3d3e28da21d0b91 Mon Sep 17 00:00:00 2001
From: Marc Laval <mlaval@amadeus.com>
Date: Thu, 21 May 2015 18:18:19 +0200
Subject: [PATCH] fix(collection): new Set(iterable) is not supported (IE11,
 Safari)

Closes #2063
---
 modules/angular2/src/facade/collection.ts | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/modules/angular2/src/facade/collection.ts b/modules/angular2/src/facade/collection.ts
index 47659c5755..b76358af5e 100644
--- a/modules/angular2/src/facade/collection.ts
+++ b/modules/angular2/src/facade/collection.ts
@@ -233,7 +233,26 @@ export function iterateListLike(obj, fn: Function) {
   }
 }
 
+
+// Safari and Internet Explorer do not support the iterable parameter to the
+// Set constructor.  We work around that by manually adding the items.
+var createSetFromList: {(lst: List<any>): Set<any>} = (function() {
+  var test = new Set([1, 2, 3]);
+  if (test.size === 3) {
+    return function createSetFromList(lst: List<any>): Set<any> { return new Set(lst); };
+  } else {
+    return function createSetAndPopulateFromList(lst: List<any>): Set<any> {
+      var res = new Set(lst);
+      if (res.size !== lst.length) {
+        for (var i = 0; i < lst.length; i++) {
+          res.add(lst[i]);
+        }
+      }
+      return res;
+    };
+  }
+})();
 export class SetWrapper {
-  static createFromList<T>(lst: List<T>): Set<T> { return new Set(lst); }
+  static createFromList<T>(lst: List<T>): Set<T> { return createSetFromList(lst); }
   static has<T>(s: Set<T>, key: T): boolean { return s.has(key); }
 }