Enable regular expressions.

- add regular expressions support to JS parser and interpreter;
- add tests for regular expressions.

JerryScript-DCO-1.0-Signed-off-by: Szilard Ledan szledan.u-szeged@partner.samsung.com
JerryScript-DCO-1.0-Signed-off-by: László Langó llango.u-szeged@partner.samsung.com

tests/jerry/regexp-construct.js

@@ -0,0 +1,88 @@
+// Copyright 2015 Samsung Electronics Co., Ltd.
+// Copyright 2015 University of Szeged.
+//
+// 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.
+
+var r;
+
+r = new RegExp ();
+assert (r.source == "(?:)");
+assert (r.global == false);
+assert (r.ignoreCase == false);
+assert (r.multiline == false);
+
+r = new RegExp ("a");
+assert (r.source == "a");
+assert (r.global == false);
+assert (r.ignoreCase == false);
+assert (r.multiline == false);
+
+r = new RegExp ("a","gim");
+assert (r.source == "a");
+assert (r.global == true);
+assert (r.ignoreCase == true);
+assert (r.multiline == true);
+
+r = RegExp ("a");
+assert (r.source == "a");
+assert (r.global == false);
+assert (r.ignoreCase == false);
+assert (r.multiline == false);
+
+r = RegExp ("a","gim");
+assert (r.source == "a");
+assert (r.global == true);
+assert (r.ignoreCase == true);
+assert (r.multiline == true);
+
+var r2;
+try {
+  r2 = RegExp (r,"gim");
+  assert(false);
+}
+catch ( e )
+{
+  assert (e instanceof TypeError);
+}
+
+r2 = RegExp (r);
+assert (r2.source == "a");
+assert (r2.global == true);
+assert (r2.ignoreCase == true);
+assert (r2.multiline == true);
+
+r2 = RegExp (r, undefined);
+assert (r2.source == "a");
+assert (r2.global == true);
+assert (r2.ignoreCase == true);
+assert (r2.multiline == true);
+
+r = /(?:)/;
+assert (r.source == "(?:)");
+assert (r.global == false);
+assert (r.ignoreCase == false);
+assert (r.multiline == false);
+
+r = /a/;
+assert (r.source == "a");
+assert (r.global == false);
+assert (r.ignoreCase == false);
+assert (r.multiline == false);
+
+r = /a/gim;
+assert (r.source == "a");
+assert (r.global == true);
+assert (r.ignoreCase == true);
+assert (r.multiline == true);
+
+assert(Object.prototype.toString.call(RegExp.prototype) === '[object RegExp]');