Improve arguments object (#4145)

- Enhancement: Arguments object properties are now lazy instantiated
 - Bugfix: Mapped arguments object instantiated properties cannot be lcached
 - Bugfix: Mapped arguments should be constructed even if 0 formal parameters or arguments are provided
 - Update: remove 'caller' property of unmapped arguments object

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

tests/jerry/arguments.js

@@ -120,7 +120,6 @@ fn_expr = function (a, b, c)
     }
   }
 
-  check_type_error_for_property (arguments, 'caller');
   check_type_error_for_property (arguments, 'callee');
 }
 

tests/jerry/es.next/arguments.js

@@ -0,0 +1,21 @@
+// 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 f(a, b, c)
+{
+  'use strict';
+  assert(!Object.hasOwnProperty(arguments,'caller'));
+}
+
+f(1, 2, 3);

tests/jerry/es5.1/arguments.js

@@ -0,0 +1,26 @@
+// 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 f(a, b, c)
+{
+  'use strict';
+  try {
+    arguments['caller'];
+    assert(false);
+  } catch (e) {
+    assert(e instanceof TypeError);
+  }
+}
+
+f(1, 2, 3);