Implement parsing of ES6 Rest Parameters

src/token.h

 // Copyright 2012 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_TOKEN_H_
 #define V8_TOKEN_H_
 
 #include "src/base/logging.h"
 #include "src/globals.h"
 
@@ skipping 22 matching lines @@
   /* Punctuators (ECMA-262, section 7.7, page 15). */                \
   T(LPAREN, "(", 0)                                                  \
   T(RPAREN, ")", 0)                                                  \
   T(LBRACK, "[", 0)                                                  \
   T(RBRACK, "]", 0)                                                  \
   T(LBRACE, "{", 0)                                                  \
   T(RBRACE, "}", 0)                                                  \
   T(COLON, ":", 0)                                                   \
   T(SEMICOLON, ";", 0)                                               \
   T(PERIOD, ".", 0)                                                  \
+  T(ELLIPSIS, "...", 0)                                               \
   T(CONDITIONAL, "?", 3)                                             \
   T(INC, "++", 0)                                                    \
   T(DEC, "--", 0)                                                    \
   T(ARROW, "=>", 0)                                                  \
                                                                      \
   /* Assignment operators. */                                        \
   /* IsAssignmentOp() and Assignment::is_compound() relies on */     \
   /* this block of enum values being contiguous and sorted in the */ \
   /* same order! */                                                  \
   T(INIT_VAR, "=init_var", 2)                   /* AST-use only. */  \
@@ skipping 258 matching lines @@
  private:
   static const char* const name_[NUM_TOKENS];
   static const char* const string_[NUM_TOKENS];
   static const int8_t precedence_[NUM_TOKENS];
   static const char token_type[NUM_TOKENS];
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TOKEN_H_