Support ES6 based octal literals (#3338)

JerryScript-DCO-1.0-Signed-off-by: Roland Takacs r.takacs2@partner.samsung.com

tests/jerry/es2015/octal-literal.js

@@ -0,0 +1,46 @@
+/* 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 checkSyntaxError (str) {
+  try {
+    eval (str);
+    assert (false);
+  } catch (e) {
+    assert (e instanceof SyntaxError);
+  }
+}
+
+checkSyntaxError ("0p");
+checkSyntaxError ("0o");
+checkSyntaxError ("0o0123456789");
+checkSyntaxError ("0o9");
+
+checkSyntaxError ("0p");
+checkSyntaxError ("0O");
+checkSyntaxError ("0O9");
+
+// Check strict mode
+checkSyntaxError ("'use strict'; 0777");
+assert (eval ("'use strict'; 0o777") === 511);
+
+assert (0o123 === 83);
+assert (0o77777777 === 16777215);
+assert (0o767 === parseInt ("767", 8));
+assert (0767 === 0o767);
+
+assert (0O123 === 83);
+assert (0O77777777 === 16777215);
+assert (0O767 === parseInt ("767", 8));
+assert (0767 === 0O767);