Implement Harmony sets and maps.

src/collection.js

+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// This file relies on the fact that the following declaration has been made
+// in runtime.js:
+// const $Object = global.Object;

[rossberg, 2011/10/24 15:44:11]

Not needed?

[Michael Starzinger, 2011/10/25 11:17:26]

Done.

+const $Set = global.Set;
+const $Map = global.Map;
+
+//-------------------------------------------------------------------
+
+function SetConstructor() {
+  if (%_IsConstructCall()) {
+    %SetInitialize(this);
+  } else {
+    return new $Set();
+  }
+}
+
+
+function SetAdd(key) {
+  return %SetAccess(this, key, SET_ACCESS_ADD);
+}
+
+
+function SetHas(key) {
+  return %SetAccess(this, key, SET_ACCESS_HAS);
+}
+
+
+function SetDelete(key) {
+  return %SetAccess(this, key, SET_ACCESS_DELETE);
+}
+
+
+function MapConstructor() {
+  if (%_IsConstructCall()) {
+    %MapInitialize(this);
+  } else {
+    return new $Map();
+  }
+}
+
+
+function MapGet(key) {
+  return %MapGet(this, key);
+}
+
+
+function MapSet(key, value) {
+  return %MapSet(this, key, value);
+}
+
+
+function MapHas(key) {
+  return !IS_UNDEFINED(%MapGet(this, key));
+}
+
+
+function MapDelete(key) {
+  if (!IS_UNDEFINED(%MapGet(this, key))) {
+    %MapSet(this, key, void 0);
+    return true;
+  } else {
+    return false;
+  }
+}
+
+// -------------------------------------------------------------------
+
+(function () {
+  %CheckIsBootstrapping();
+
+  // Set up the Set and Map constructor function.
+  %SetCode($Set, SetConstructor);
+  %SetCode($Map, MapConstructor);
+
+  // Set up the constructor property on the Set and Map prototype object.
+  %SetProperty($Set.prototype, "constructor", $Set, DONT_ENUM);
+  %SetProperty($Map.prototype, "constructor", $Map, DONT_ENUM);
+
+  // Set up the non-enumerable functions on the Set prototype object.
+  InstallFunctionsOnHiddenPrototype($Set.prototype, DONT_ENUM, $Array(
+    "add", SetAdd,
+    "has", SetHas,
+    "delete", SetDelete
+  ));
+
+  // Set up the non-enumerable functions on the Map prototype object.
+  InstallFunctionsOnHiddenPrototype($Map.prototype, DONT_ENUM, $Array(
+    "get", MapGet,
+    "set", MapSet,
+    "has", MapHas,
+    "delete", MapDelete
+  ));
+})();