Re-target for ES.Next (#3901)

A list of changes:
- 'es2015-subset' profile is deprecated, and an 'es.next' profile is added.
- The default profile is changed to 'es.next'
- Renamed the JERRY_ES2015 guard to JERRY_ESNEXT
- Renamed JERRY_ES2015_BUILTIN_* guards to JERRY_BUILTIN_*
- Moved es2015 specific tests to a new 'es.next' subdirectory
- Updated docs, targets, and test runners to reflect these changes

Resolves #3737.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu

tests/jerry/es.next/regexp-routines.js

@@ -0,0 +1,146 @@
+// 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.
+
+var r = new RegExp('a', 'gimuy');
+assert (r.flags === 'gimuy');
+assert (r.toString() === '/a/gimuy');
+
+try {
+  Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags').get.call(42);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+var o = {
+  global: true,
+  unicode: true,
+  sticky: true,
+  source: "str"
+}
+
+Object.defineProperty(o, 'flags', Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags'));
+assert(o.flags === "guy");
+assert (RegExp.prototype.toString.call (o) === "/str/guy");
+
+Object.defineProperty(o, 'multiline', { 'get': function () {throw "abrupt flag get"; }});
+try {
+  o.flags
+  assert (false);
+} catch (e) {
+  assert (e === "abrupt flag get");
+}
+
+try {
+  RegExp.prototype.toString.call(42);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+assert (RegExp.prototype.toString.call({}) === "/undefined/undefined");
+
+var o = {};
+Object.defineProperty (o, 'source', { 'get' : function () {throw "abrupt source get"; } });
+try {
+  RegExp.prototype.toString.call(o);
+  assert (false);
+} catch (e) {
+  assert (e === "abrupt source get");
+}
+
+var o = {source: {toString: function() {throw "abrupt source toString";}}};
+try {
+  RegExp.prototype.toString.call(o);
+  assert (false);
+} catch (e) {
+  assert (e === "abrupt source toString");
+}
+
+var o = {source: "str"};
+Object.defineProperty (o, 'flags', { 'get' : function () {throw "abrupt flags get"; } });
+try {
+  RegExp.prototype.toString.call(o);
+  assert (false);
+} catch (e) {
+  assert (e === "abrupt flags get");
+}
+
+var o = {source: "str", flags: {toString: function() {throw "abrupt flags toString";}}};
+try {
+  RegExp.prototype.toString.call(o);
+  assert (false);
+} catch (e) {
+  assert (e === "abrupt flags toString");
+}
+
+var o = {
+  global: true,
+  source: "str"
+}
+
+Object.defineProperty(o, 'unicode', { 'get': function () {throw "abrupt unicode get"; }});
+try {
+  RegExp.prototype[Symbol.match].call(o, "str");
+  assert (false);
+} catch (e) {
+  assert (e === "abrupt unicode get");
+}
+
+assert ("str𐲡fgh".replace(/(?:)/gu, "x") === 'xsxtxrx𐲡xfxgxhx');
+assert ("str𐲡fgh".replace(/(?:)/g, "x") === 'xsxtxrx\ud803x\udca1xfxgxhx');
+
+r = /(?:)/gu;
+/* Disable fast path. */
+r.exec = function (s) { return RegExp.prototype.exec.call(this, s); };
+
+assert ("str𐲡fgh".replace(r, "x") === 'xsxtxrx𐲡xfxgxhx');
+Object.defineProperty(r, 'unicode', {value: false});
+assert ("str𐲡fgh".replace(r, "x") === 'xsxtxrx\ud803x\udca1xfxgxhx');
+
+r = /(?:)/gu;
+assert (RegExp.prototype[Symbol.match].call(r, "str𐲡fgh").length === 8);
+Object.defineProperty(r, 'unicode', {value: false});
+assert (RegExp.prototype[Symbol.match].call(r, "str𐲡fgh").length === 9);
+
+r = /(?:)/gy;
+r.lastIndex = 2;
+assert ("asd".replace(r, "x") === "xaxsxdx");
+assert (r.lastIndex === 0);
+
+r.lastIndex = 5;
+assert ("asd".replace(r, "x") === "xaxsxdx");
+assert (r.lastIndex === 0);
+
+r = /(?:)/y;
+r.lastIndex = 2;
+assert ("asd".replace(r, "x") === "asxd");
+assert (r.lastIndex === 2);
+
+r.lastIndex = 5;
+assert ("asd".replace(r, "x") === "asd");
+assert (r.lastIndex === 0);
+
+r.lastIndex = 2;
+/* Disable fast path. */
+r.exec = function (s) { return RegExp.prototype.exec.call(this, s); };
+assert ("asd".replace(r, "x") === "asxd");
+assert (r.lastIndex === 2);
+
+r.lastIndex = 5;
+assert ("asd".replace(r, "x") === "asd");
+assert (r.lastIndex === 0);
+
+assert (RegExp.prototype[Symbol.match].call(/a/y, "aaa").length === 1);
+assert (RegExp.prototype[Symbol.match].call(/a/gy, "aaa").length === 3);