[regexp] implement \p{Other_ID_Start} and \p{Other_ID_Continue}.

test/mjsunit/harmony/regexp-property-special.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --harmony-regexp-property
 
 function t(re, s) { assertTrue(re.test(s)); }
 function f(re, s) { assertFalse(re.test(s)); }
 
 t(/\p{ASCII}+/u, "abc123");
@@ skipping 26 matching lines @@
 t(/\p{Assigned}+/u, "🄰🄱🄲");
 f(/\p{Assigned}+/u, "\ufdd0");
 f(/\p{Assigned}+/u, "\u{fffff}");
 
 f(/\P{Assigned}+/u, "123");
 f(/\P{Assigned}+/u, "🄰🄱🄲");
 t(/\P{Assigned}+/u, "\ufdd0");
 t(/\P{Assigned}+/u, "\u{fffff}");
 f(/\P{Assigned}/u, "");
 
-t(/[^\P{Assigned}]+/u, "123");
-f(/[\P{Assigned}]+/u, "🄰🄱🄲");
-f(/[^\P{Assigned}]+/u, "\ufdd0");
-t(/[\P{Assigned}]+/u, "\u{fffff}");
-f(/[\P{Assigned}]/u, "");
+f(/[^\u1234\p{ASCII}]+/u, "\u1234");
+t(/[x\P{ASCII}]+/u, "x");
+t(/[\u1234\p{ASCII}]+/u, "\u1234");
+
+t(/^\p{Other_ID_Start}+$/u, "\u1885\u1886\u2118\u212e\u309b\u309c");
+f(/\P{OIDS}/u, "\u1885\u1886\u2118\u212e\u309b\u309c");
+f(/^[x\P{Other_ID_Start}]+$/u, "\u1885\u1886\u2118\u212e\u309b\u309cx");
+t(/[x\P{OIDS}]/u, "\u1885\u1886\u2118\u212e\u309b\u309cx");

[jgruber, 2017/04/10 13:46:50]

Is this test missing anchors? Otherwise it will match just due to the 'x'.

[Yang, 2017/04/11 09:00:37]

Good catch. Fixed.

+
+t(/^\p{Other_ID_Continue}+$/u, "\u00b7\u0387\u1369\u1371\u19da");

[jgruber, 2017/04/10 13:46:50]

We could include 

0x136A, 0x136B, 0x136C, 0x136D, 0x136E, 0x136F, 0x1370

just to be complete.

[Yang, 2017/04/11 09:00:37]

Done.

+f(/\P{OIDC}/u, "\u00b7\u0387\u1369\u1371\u19da");