ES6 symbols: enable symbols as weak map keys

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/12456004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13829 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/collection.js

@@ -197,7 +197,7 @@ function WeakMapGet(key) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['WeakMap.prototype.get', this]);
   }
-  if (!IS_SPEC_OBJECT(key)) {
+  if (!(IS_SPEC_OBJECT(key) || IS_SYMBOL(key))) {
     throw %MakeTypeError('invalid_weakmap_key', [this, key]);
   }
   return %WeakMapGet(this, key);
@@ -209,7 +209,7 @@ function WeakMapSet(key, value) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['WeakMap.prototype.set', this]);
   }
-  if (!IS_SPEC_OBJECT(key)) {
+  if (!(IS_SPEC_OBJECT(key) || IS_SYMBOL(key))) {
     throw %MakeTypeError('invalid_weakmap_key', [this, key]);
   }
   return %WeakMapSet(this, key, value);
@@ -221,7 +221,7 @@ function WeakMapHas(key) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['WeakMap.prototype.has', this]);
   }
-  if (!IS_SPEC_OBJECT(key)) {
+  if (!(IS_SPEC_OBJECT(key) || IS_SYMBOL(key))) {
     throw %MakeTypeError('invalid_weakmap_key', [this, key]);
   }
   return %WeakMapHas(this, key);
@@ -233,7 +233,7 @@ function WeakMapDelete(key) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['WeakMap.prototype.delete', this]);
   }
-  if (!IS_SPEC_OBJECT(key)) {
+  if (!(IS_SPEC_OBJECT(key) || IS_SYMBOL(key))) {
     throw %MakeTypeError('invalid_weakmap_key', [this, key]);
   }
   return %WeakMapDelete(this, key);

src/runtime.cc

@@ -899,7 +899,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapGet) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSWeakMap, weakmap, 0);
-  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, key, 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
   Handle<ObjectHashTable> table(ObjectHashTable::cast(weakmap->table()));
   Handle<Object> lookup(table->Lookup(*key), isolate);
   return lookup->IsTheHole() ? isolate->heap()->undefined_value() : *lookup;
@@ -910,7 +910,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapHas) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSWeakMap, weakmap, 0);
-  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, key, 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
   Handle<ObjectHashTable> table(ObjectHashTable::cast(weakmap->table()));
   Handle<Object> lookup(table->Lookup(*key), isolate);
   return isolate->heap()->ToBoolean(!lookup->IsTheHole());
@@ -921,7 +921,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapDelete) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSWeakMap, weakmap, 0);
-  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, key, 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
   Handle<ObjectHashTable> table(ObjectHashTable::cast(weakmap->table()));
   Handle<Object> lookup(table->Lookup(*key), isolate);
   Handle<ObjectHashTable> new_table =
@@ -935,7 +935,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapSet) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 3);
   CONVERT_ARG_HANDLE_CHECKED(JSWeakMap, weakmap, 0);
-  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, key, 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
   Handle<Object> value(args[2], isolate);
   Handle<ObjectHashTable> table(ObjectHashTable::cast(weakmap->table()));
   Handle<ObjectHashTable> new_table = PutIntoObjectHashTable(table, key, value);

test/mjsunit/harmony/symbols.js

@@ -114,17 +114,33 @@ function TestSet() {
 TestSet()
 
 
-function TestMap() {
+function TestCollections() {
+  var set = new Set
   var map = new Map
+  var weakmap = new WeakMap
   for (var i in symbols) {
+    set.add(symbols[i])
     map.set(symbols[i], i)
+    weakmap.set(symbols[i], i)
   }
+  assertEquals(symbols.length, set.size)
+  assertEquals(symbols.length, map.size)
   for (var i in symbols) {
+    assertTrue(set.has(symbols[i]))
     assertTrue(map.has(symbols[i]))
+    assertTrue(weakmap.has(symbols[i]))
     assertEquals(i, map.get(symbols[i]))
+    assertEquals(i, weakmap.get(symbols[i]))
   }
+  for (var i in symbols) {
+    assertTrue(set.delete(symbols[i]))
+    assertTrue(map.delete(symbols[i]))
+    assertTrue(weakmap.delete(symbols[i]))
+  }
+  assertEquals(0, set.size)
+  assertEquals(0, map.size)
 }
-TestMap()
+TestCollections()