[regexp] experimental implementation for \p property class.

src/regexp/regexp-parser.h

 // 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.
 
 #ifndef V8_REGEXP_REGEXP_PARSER_H_
 #define V8_REGEXP_REGEXP_PARSER_H_
 
 #include "src/objects.h"
 #include "src/regexp/regexp-ast.h"
 #include "src/zone.h"
@@ skipping 155 matching lines @@
 
   // Parses and returns a single escaped character.  The character
   // must not be 'b' or 'B' since they are usually handle specially.
   uc32 ParseClassCharacterEscape();
 
   // Checks whether the following is a length-digit hexadecimal number,
   // and sets the value if it is.
   bool ParseHexEscape(int length, uc32* value);
   bool ParseUnicodeEscape(uc32* value);
   bool ParseUnlimitedLengthHexNumber(int max_value, uc32* value);
+  ZoneList<CharacterRange>* ParsePropertyClass();
 
   uc32 ParseOctalLiteral();
 
   // Tries to parse the input as a back reference.  If successful it
   // stores the result in the output parameter and returns true.  If
   // it fails it will push back the characters read so the same characters
   // can be reparsed.
   bool ParseBackReferenceIndex(int* index_out);
 
   CharacterRange ParseClassAtom(uc16* char_class);
@@ skipping 102 matching lines @@
   bool simple_;
   bool contains_anchor_;
   bool is_scanned_for_captures_;
   bool failed_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_REGEXP_REGEXP_PARSER_H_