Implement ES2015 Function.prototype[@@hasInstance] (#3225)

Added hasInstance well known symbol implementation for Function.prototype.
This change however does not implement the ES2015 `instanceof` operator changes.

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com
JerryScript-DCO-1.0-Signed-off-by: Dániel Vince vinced@inf.u-szeged.hu

tests/jerry/es2015/function-prototype-hasinstance-class.js

@@ -0,0 +1,53 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+class base {
+  constructor (value) {
+    this.member = value;
+  }
+
+  method () {
+    return this.member;
+  }
+}
+
+class sub {
+  constructor (value) {
+    this.member = value;
+  }
+}
+
+var obj_base = new base (3);
+var obj_sub = new sub (4);
+
+assert (base[Symbol.hasInstance](obj_base) === true);
+assert (base[Symbol.hasInstance](obj_sub) === false);
+
+assert (sub[Symbol.hasInstance](obj_base) === false);
+assert (sub[Symbol.hasInstance](obj_sub) === true);
+
+
+class sub_c extends base {
+  constructor (value) {
+    super(value);
+    this.member = value;
+  }
+}
+
+var obj_sub_c = new sub_c (5);
+
+assert (base[Symbol.hasInstance](obj_sub_c) === true);
+
+assert (sub_c[Symbol.hasInstance](obj_base) === false);
+assert (sub_c[Symbol.hasInstance](obj_sub_c) === true);

tests/jerry/es2015/function-prototype-hasinstance.js

@@ -0,0 +1,81 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+function base (value) {
+  this.member = value;
+}
+
+base.prototype.method = function () { return this.member; }
+
+function sub (value) {
+  this.member = value;
+}
+
+sub.prototype = base;
+
+
+var obj_base = new base (3);
+var obj_sub = new sub (4);
+
+assert (base[Symbol.hasInstance] (obj_base) === true);
+assert (base[Symbol.hasInstance] (obj_sub) === false);
+assert (Object[Symbol.hasInstance] (obj_base) === true);
+assert (Object[Symbol.hasInstance] (obj_sub) === true);
+assert (obj_base.method () === 3);
+
+assert (sub[Symbol.hasInstance] (obj_base) === false);
+assert (sub[Symbol.hasInstance] (obj_sub) === true);
+assert (obj_sub.method === undefined);
+
+function sub_c (value) {
+  this.member = value;
+}
+
+sub_c.prototype = Object.create (base.prototype)
+sub_c.prototype.constructor = sub_c
+
+var obj_sub_c = new sub_c (5);
+
+assert (base[Symbol.hasInstance] (obj_sub_c) === true);
+
+assert (sub_c[Symbol.hasInstance] (obj_base) === false);
+assert (sub_c[Symbol.hasInstance] (obj_sub_c) === true);
+assert (Object[Symbol.hasInstance] (obj_sub_c) === true);
+assert (Function.prototype[Symbol.hasInstance].call (sub_c, obj_sub_c) === true);
+
+assert (obj_sub_c.method () === 5);
+
+assert (base[Symbol.hasInstance] (3) === false);
+assert (Number[Symbol.hasInstance] (33) === false);
+assert (Number[Symbol.hasInstance] (new Number (33)) === true);
+assert (Object[Symbol.hasInstance] (44) === false);
+assert (Object[Symbol.hasInstance] (new Number (22)) === true);
+
+assert (base[Symbol.hasInstance] ('demo') === false);
+assert (String[Symbol.hasInstance] ('demo') === false);
+assert (String[Symbol.hasInstance] (new String ('demo')) === true);
+assert (Object[Symbol.hasInstance] ('demo') === false);
+assert (Object[Symbol.hasInstance] (new String ('demo')) === true);
+
+assert (base[Symbol.hasInstance] ([]) === false);
+assert (base[Symbol.hasInstance] ([1, 2]) === false);
+assert (Array[Symbol.hasInstance] ([1, 2]) === true);
+assert (Array[Symbol.hasInstance] (new Array(1, 2)) === true);
+assert (Object[Symbol.hasInstance] ([]) === true);
+assert (Object[Symbol.hasInstance] (new Array()) === true);
+
+assert (base[Symbol.hasInstance] (new RegExp('abc')) === false);
+assert (RegExp[Symbol.hasInstance] (/abc/) === true);
+assert (RegExp[Symbol.hasInstance] (new RegExp('abc')) === true);
+assert (Object[Symbol.hasInstance] (/abc/) === true);